Journal articles on the topic 'CBCT dentaire'
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1
Sygouros, Antonios, Melih Motro, Faysal Ugurlu, and Ahu Acar. "Expansion maxillaire rapide assistée chirurgicalement. Évaluation de différentes techniques chirurgicales et de leur effet sur le complexe dento-squelettique maxillaire par tomographie volumique à faisceau conique (CBCT). Rapport préliminaire." L'Orthodontie Française 85, no. 2 (June 2014): 175–87. http://dx.doi.org/10.1051/orthodfr/2014005.
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Objectif – Évaluer et comparer les effets dento-squelettiques associés à l’expansion maxillaire rapide assistée chirurgicalement (surgically assisted rapid maxillary expansion ou SARME) réalisée avec (+) et sans (–) disjonction ptérygo-maxillaire (pterygomaxillary disjunction ou PD), en utilisant la tomographie volumique à faisceau conique (cone beam computed tomography ou CBCT). Matériels et méthodes – Étude rétrospective sur neuf patients (1 homme, 8 femmes, âge moyen de 18,9 ans) ayant bénéficié de SARME et répartis en deux groupes. Dans le groupe (–PD), la technique chirurgicale suivie impliquait une ostéotomie bilatérale de type Lefort I ainsi qu’une ostéotomie médiane. Dans le groupe (+PD), le même protocole a été suivi et une disjonction ptérygoïdienne a été réalisée en plus. Des images CBCT tridimensionnelles ont été obtenues en pré-opératoire et après 3–6 mois de contention. Un disjoncteur avec résine de type Hyrax collé a été employé. Le logiciel MIMICS 14.0 (Materialise Europe, Belgique) a été utilisé pour évaluer l’expansion transversale aux niveaux squelettique, dento-alvéolaire et dentaire. De plus, les inclinaisons dentaires, la flexion alvéolaire et le schéma d’expansion sagittale ont été évalués. Le test de Wilcoxon et le test U de Mann et Whitney ont été utilisés pour les comparaisons. Résultats et discussion – Aux niveaux dentaire et dento-alvéolaire, toutes les mesures linéaires transversales ont montré une augmentation statistiquement significative (P < 0,05) dans les deux groupes traités. Au niveau squelettique, aucune différence statistiquement significative n’a été trouvée entre les deux groupes ou au sein des groupes (hormis l’expansion antérieure du maxillaire entre les rebords bilatéraux de l’orifice piriforme). Dans le groupe (–PD), une version vestibulaire significative de la première prémolaire a été observée, de même qu’une augmentation de la flexion vestibulaire de la crête alvéolaire. Conclusion – Cette étude confirme que la SARME est un traitement efficace de l’insuffisance maxillaire transversale. Le CBCT est un outil approprié pour évaluer les effets dento-squelettiques du traitement.
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Bellaiche, Norbert. "Cone beam et articulations temporo mandibulaires." Revue d'Orthopédie Dento-Faciale 57, no. 1 (March 2023): 55–71. http://dx.doi.org/10.1051/odf/2023007.
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Le CBCT (Cone Beam Computed Tomography) s’est imposé comme l’examen radiologique de choix à visée squelettique des articulations temporomandibulaires (ATM). Le CBCT est indiqué, en complément d’un panoramique dentaire : en cas de suspicion de dysfonctionnement discal : Syndrome algodysfonctionnel de l’appareil manducateur (SADAM) ou Désordre Temporo Mandibulaire (DTM). dans d’autres situations évocatrices de pathologies de l’ATM (traumatisme, contexte inflammatoire, malformation congénitale…). Les pathologies les plus fréquentes sont en rapport avec un dysfonctionnement discal : anomalies fonctionnelles (limitation d’ouverture buccale et trismus) et arthrose. Dans ces deux cas un traitement symptomatique fonctionnel est mis en place. Les autres pathologies sont plus rares : arthrites inflammatoires ou infectieuses, fractures, ankyloses, ostéonécrose aseptique d’un condyle, pathologies congénitales, tumeurs le plus souvent bénignes…
3
Couraud, Pierre. "Densité osseuse et radiographie panoramique : incidences orthodontiques." Revue d'Orthopédie Dento-Faciale 56, no. 4 (December 2022): 341–48. http://dx.doi.org/10.1051/odf/2022039.
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Introduction : le panoramique dentaire tient une place prépondérante dans l'investigation radiologique et le diagnostic en orthodontie. Les examens 3D comme le CBCT font office de gold standard dans l'étude de la qualité osseuse mais tous nos cabinets n'en sont pas encore équipés. Par sa simplicité d'utilisation et d'analyse le panoramique dentaire est quant à lui présent dans l'immense majorité de nos cabinets. Par des outils simples applicables sur un cliché panoramique il est possible d'obtenir une évaluation préliminaire de la densité osseuse. C'est dans ce contexte que nous avons souhaité étudier la densité osseuse sur panoramique et en connaître les intérêts dans notre pratique quotidienne. Conclusions : l'estimation de la densité osseuse sur radiographie panoramique est utile pour la planification de nos traitements d'orthodontie, le choix des dimensions des mini-vis d'ancrage, la durée, la stabilité du traitement et la détection de l'ostéoporose.
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Petitpas, Laurent, and Hugo Harter. "Aide de l’imagerie 3D pour le diagnostic d’une Classe II asymétrique." Revue d'Orthopédie Dento-Faciale 55, no. 3 (September 2021): 371–82. http://dx.doi.org/10.1051/odf/2021024.
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Depuis maintenant plusieurs années, nous pouvons compter sur l’utilisation des outils numériques d’imagerie 3D pour affiner un diagnostic orthodontique qui se veut de plus en plus précis. Ces différents outils 3D permettent de mettre en évidence de manière plus importante les dysmorphoses, notamment en visualisant le siège de nombreuses asymétries, et ce grâce à la réalisation de superpositions 3D des empreintes optiques et des enregistrements de CBCT (Cone Beam Computed Tomography). Cet article montre de nombreuses possibilités quant à la visualisation d’un patient virtualisé en 3D présentant une Classe II asymétrique dentaire et diverses dysmorphoses.
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Yan, Bin, Zongyang Sun, Henry Fields, and Lin Wang. "La canine maxillaire incluse augmente le risque de résorption radiculaire des dents adjacentes : un problème de proximité anatomique." L'Orthodontie Française 86, no. 2 (June 2015): 169–79. http://dx.doi.org/10.1051/orthodfr/2015014.
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Introduction : Notre objectif est d’étudier la fréquence, la localisation et l’étendue des résorptions, ainsi que les facteurs de risque de ces résorptions radiculaires associées aux canines incluses (RRACI) dans une population de patients chinois qui, contrairement aux caucasiens, présentent de façon prédominante des canines incluses en ectopie vestibulaire. Méthodes : Des cone beam (CBCT) de 170 sujets chinois (âge 12–30 ans; moyenne 14,5 ans) présentant des canines incluses (101 en position vestibulaire et 69 en position palatine) ont été comparés à ceux de 170 patients d’âge et de sexe équivalents sans canine incluse. Tous les cone beam furent analysés grâce à un logiciel par un seul évaluateur. La fréquence, la localisation et l’étendue des RRACI ont été évaluées sur les incisives centrales et latérales maxillaires, ainsi que sur la 1re prémolaire maxillaire. Afin d’identifier les facteurs de risques des RRACI, les sujets présentant des canines incluses ont été séparés en deux groupes (avec et sans résorption radiculaire). Pour chaque dent, dix variables ont été mesurées et comparées pour chaque groupe puis soumise à un test statistique de régression logique binaire. Résultats : En comparant avec le groupe contrôle et le côté indemne d’inclusion canine, les résorptions radiculaires étaient significativement plus présentes chez les sujets comportant les canines incluses et du côté de l’impaction (P < 0,001), avec un taux de prévalence respectif de 27 %, 18 % et 10 % sur l’incisive latérale maxillaire, l’incisive centrale et la 1re prémolaire. Affectant essentiellement le tiers apical, les RRACI, lorsqu’elles sont présentes, peuvent aussi atteindre la pulpe dentaire dans 36 % des incisives latérales maxillaires, 57 % des incisives centrales maxillaires et 0 % des premières prémolaires. Les différentes variables associées à la proximité radiculaire des dents adjacentes (présentant ou non des résorptions) à la canine incluse montrent des résultats différents selon les sites d’inclusion (quadrants), tandis que le stade de développement de la canine représente un facteur de risque significatif de résorption pour l’incisive centrale maxillaire et l’incisive latérale. Aucune différence significative de RRACI n’a été mise en évidence entre les sujets présentant des canines incluses en ectopie vestibulaires ou palatines. Le facteur de proximité entre la couronne de la canine et la racine dentaire, quelle qu’elle soit, représente le facteur de risque prédominant des RRACI. Une relation de proximité < 1 mm aboutissait à un taux de résorption radiculaire plus significatif comparée à une relation de proximité ≥ 1 mm. Les Odd ratios étaient de 9,9; 3,7 et 5,9 pour l’incisive latérale maxillaire, l’incisive centrale et la première prémolaire respectivement. Conclusions : Les canines maxillaires incluses augmentent le risque de résorption radiculaire des dents adjacentes (incisives et premières prémolaires). La proximité (<1 mm) entre la canine incluse et une racine adjacente est le facteur de risque de résorption radiculaire le plus significatif, que ce soit dans la population chinoise ou caucasienne.
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Felizardo, Rufino. "Imagerie des inclusions dentaires en CBCT." Revue d'Orthopédie Dento-Faciale 57, no. 1 (March 2023): 25–48. http://dx.doi.org/10.1051/odf/2023005.
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À la convergence de l’odontologie pédiatrique, de l’orthodontie et de la chirurgie orale la prise en charge des dents incluses est multidisciplinaire et nécessitera fréquemment le recours à un examen CBCT afin d’évaluer les options thérapeutiques (désinclusion chirurgico-orthodontique, avulsion, réimplantation, abstention), les atteintes des dents adjacentes, les voies d’abord chirurgicales et risques anatomiques associés dès lors que les limites des examens 2D sont atteintes. Par une large iconographie clinique nous aborderons les différentes étiologies des inclusions ainsi qu’une méthodologie simple d’analyse des volumes CBCT permettant au clinicien d’exploiter pleinement tous les éléments pouvant être mis en évidence sur ce type d’examen.
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Jurić, Barbara, and Tatjana Matijaš. "Uloga CBCT-a u području dentalne implantologije." Radiološki vjesnik 47, no. 1 (May 22, 2023): 16–27. http://dx.doi.org/10.55378/rv.47.1.2.
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As radiology rapidly and continuously develops, dental radiological devices are becoming integral to dental practice. CBCT enables a precise three-dimensional image of the orofacial region. The wider use of CBCT devices is further encouraged by the flaws of two-dimensional radiological methods, especially concerning dental implantology. This paper aims to describe the advantages and disadvantages of using CBCT devices in planning and placing dental implants. It offers an insight into artifacts and radiation doses and their influence on the quality of the resulting image. The generation of multiplanar slices of the area of interest, the possibility of 3D reconstruction, the reduction of the magnification error, and the radiation dose are some of the important advantages of the CBCT device. A Limited FOV and volume of the screening, a low range of contrasts, measuring of bone density and shades of grayscale, as well as possible artifacts of movement are some of its disadvantages. Not only did the CBCT device find a purpose in the processes of planning and placement of dental implants, but also in postoperative assessments of healing and possible complications. CBCT balances the price and radiation dose and the quality of clinical information. It is used in oral surgery, orthodontics, periodontology, and endodontics. Due to its precision and quality, the CBCT device is the foundation of dental implantology.
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Medeiros, Valeska Issahó Kageyama de, Fernanda Aparecida Stresser, Thays Regina Ferreira da Costa, Ângela Fernandes, Antonio Adilson Soares de Lima, José Vinicius Bolognesi Maciel, and Maria Ângela Naval Machado. "Anatomical and dimensional evaluation of the incisive canal in brazilians using cone-beam computed tomography." STUDIES IN HEALTH SCIENCES 3, no. 3 (August 12, 2022): 1540–53. http://dx.doi.org/10.54022/shsv3n3-021.
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Objective: To evaluate the dimensions of the incisive canal (IC) and incisive foramen (IF) in dentate and maxillary anterior edentulous (MAE) individuals using cone-beam computed tomography (CBCT). Methods: This retrospective, cross-sectional study analyzed dentate and MAE individuals aged ≥ 50 years of both sexes. Using CBCT, we measured the buccal-palatal (BPW) and mesial-distal (MDW) widths of the IF and the length of the buccal cortical (BC) and palatal cortical (PC) bones and the angulation (A) of the IC in relation to the nasal floor. Results: 151 CBCT were analyzed, of which 74 were MAE and 77 dentate with a mean age of 63.3 ± 7.9 and 61.4 ± 9.3, respectively. Compared to the dentate group, the MAE group showed higher MDW of the IF (p = 0.034) and, in the IC, lower BC (p = 0.000), PC (p = 0.006), and A (p = 0.000). In the MAE individuals, the PC was higher in men when compared to women (p = 0.030). Conclusion: IC dimensions were smaller, MDW of the IF was greater in Brazilian MAE, and the PC was greater in male MAE, highlighting the importance of CBCT in planning, in the absence of maxillary anterior teeth.
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Olszewski, Raphael, Stéphanie Theys, Eytan Perez, Katarzyna Wisniewska, and Marcin Wisniewski. "Revue illustrée des principales indications de CBCT en orthodontie." NEMESIS 12, no. 1 (May 2, 2020): 1–15. http://dx.doi.org/10.14428/nemesis.v12i1.54893.
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Cette revue illustrée porte sur les principales indications actuellement recommandées dans la littérature d’utilisation du cone beam computed tomography (CBCT) en orthodontie.
Il s’agit des anomalies dentaires, des canines incluses, des dents surnuméraires, des troubles de l’éruption et des résorptions radiculaires externes liées aux traitements orthodontiques.
L’examen CBCT doit être justifié individuellement, au cas par cas, et de pouvoir apporter un bénéfice au patient en terme de diagnostic et/ou de traitement orthodontique.
L’orthodontiste prescripteur doit être capable d’interpréter et est responsable de l’interprétation de tout ce qui est visible sur l’ensemble du champs de vue du CBCT.
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Delroisse, Adrien, and Raphael Olszewski. "Syndrome de Carpenter: revue illustrée utilisant la tomodensitométrie volumique à faisceau conique." NEMESIS 22, no. 1 (April 3, 2022): 1–16. http://dx.doi.org/10.14428/nemesis.v22i1.65683.
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Objectifs de travail: Evaluer la région dento-alvéolaire chez un patient pédiatrique atteint d'un très rare syndrome de Carpenter ou d'acrocéphalopolysyndactylie de type II à l'aide de la tomodensitométrie volumique à faisceau conique (CBCT).
Cas clinique: Nous avons retrouvé une oligodontie syndromique, une transmigration canine supérieure et une agénésie exceptionnelle des quatre incisives latérales. Nous avons également décrit le quatrième cas dans la littérature d'une seule incisive inférieure solitaire sur la ligne médiane, et le premier cas jamais illustré sur CBCT.
Conclusions: Nous avons proposé et illustré l'utilisation du système de numérotation progressive des dents sur des vues axiales CBCT pour mieux comprendre les situations cliniques dentaires complexes telles que l'oligodontie
syndromique.
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Landin, Melissa, Aniket Jadhav, Sumit Yadav, and Aditya Tadinada. "A comparative study between currently used methods and Small Volume-Cone Beam Tomography for surgical placement of mini implants." Angle Orthodontist 85, no. 3 (October 24, 2014): 446–53. http://dx.doi.org/10.2319/042214-298.1.
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ABSTRACT Objective: To compare the outcome of mini implant placement by four different methods: blind placement, a single periapical radiograph (PA), a single panoramic radiograph, and a small-volume cone-beam computed tomography (SV-CBCT). Our hypothesis was that SV-CBCT, with its high resolution, low radiation dose, and three-dimensional depiction of area of interest would yield superior diagnostic information in assessing the potential anchorage site compared to currently used methods that often result in undesired root perforations. Materials and Methods: Potential mini implant sites of 20 dentate or partially dentate human skulls were imaged using three different imaging modalities: PA, panoramic radiograph, and SV-CBCT. Mini implants were placed in 10 maxillary and 10 mandibular randomized sites blindly and using each of the three imaging modalities. Large-volume CBCT scans done postoperatively were used to detect root perforation. Two oral radiologists analyzed the images for perforation of root structures at each site. Results: There was significantly (P < .05) less root perforation with SV-CBCT when compared with other imaging modalities. Fifty-five percent of mini implants placed blindly, 60% of mini implants placed using PA, and 50% of mini implants placed using a panoramic radiograph perforated a root structure, whereas only 5% of mini implants placed using SV-CBCT perforated a root structure. Conclusions: Preoperative evaluation of potential mini implant insertion sites using SV-CBCT aids in predictable placement and results in the least amount of root perforation.
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Joseph, David, and Marin Vincent. "Radioprotection et CBCT en orthodontie : données actuelles." Revue d'Orthopédie Dento-Faciale 57, no. 1 (March 2023): 9–14. http://dx.doi.org/10.1051/odf/2023003.
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Tout comme l’ensemble des disciplines médicales, l’orthodontie s’est vu doter des dernières technologies d’imagerie permettant une meilleure prise en charge individuelle. Alors que la radiographie tridimensionnelle a su s’imposer dans le diagnostic, la prise en charge et le suivi du patient dans des domaines tels que l’endodontie ou l’implantologie, la téléradiographie de profil reste aujourd’hui le gold standard en orthodontie. La radiographie tridimensionnelle s’inscrit pourtant parfaitement dans la lignée d’une prise en charge d’orthopédie préventive et interceptive en offrant une vision précise de l’ensemble des bases osseuses et des organes dentaires, de leur localisation et de leur relation avec les structures environnantes. Les informations nécessaires à la gestion d’une canine incluse, à la pose d’ancrages temporaires ou encore à l’identification de résorptions radiculaires sont autant de données primordiales que l’examen radiologique tridimensionnelle complémentaire peut offrir. Les bonnes compréhension et application du principe ALADA, basées sur la réglementation de l’exposition aux rayonnements ionisants, permettent aujourd’hui de démocratiser l’examen tridimensionnel en orthodontie au profit d’une meilleure prise en charge du patient.
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Hassan, Nuhad A., Aseel S. Khazaal Al-Jaboori, and Afya Sahib Diab Al-Radha. "Evaluation of Cortical Bone Thickness of Posterior Implant Sites Using CBCT in Iraqi Population." International Journal of Dentistry 2022 (September 5, 2022): 1–9. http://dx.doi.org/10.1155/2022/5723397.
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Background. Cortical bone thickness (CBT) is a critical factor for implant success and for determining the long-term dental implant treatment outcome. Objectives. The objective of this investigation was to examine posterior cortical bone thickness buccally and lingually in dentate and edentulous implant sites according to gender. Materials and Methods. CBT of 160 patients requiring a single posterior tooth implant was investigated by CBCT. The study included 80 males and 80 females. CBT was measured for implant edentulous sites at 3 levels including crestal bone (level 1), five mm from the crest (level 2), and ten mm from the crest (level 3). CBT was also measured for dentate sites at 3 levels including crestal bone (level 1), midroot bone (level 2), and apical portion (level 3). The differences of bone thickness between the levels of dentate sites were statistically analyzed using a Kruskal–Wallis one-way analysis of variance. Mann–Whitney test was used to determine the specific differences between group members. For the edentulous site, a one-way ANOVA was used. Results. CBT increased gradually from the crestal level to the apical level in all groups (buccal and lingual side, male and female). However, CBT at lingual side was statistically higher than that at buccal side in all groups. The mean value of CBT was significantly higher in males than females for both edentulous and dentate site. The dentate site shows a higher CBT in the apical level than the edentulous group in both male and female/buccal and lingual groups. Conclusion. CBT at the coronal levels is low and susceptible for resorption compared to the apical portion, especially for the female group. Moreover, CBT is thicker in males than females. It is essential to measure the CBT before making a treatment plan with dental implant prosthesis.
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AlOtaibi, Mlook Ghazi, Ahmad Tawfig, and Hassan Mohamed Abouelkheir. "Evaluation of shape, size, and location of mental foramen in dentulous and edentulous among Saudi population using 3D cone-beam computed tomography." F1000Research 11 (August 9, 2022): 916. http://dx.doi.org/10.12688/f1000research.74434.1.
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Background: Mental foramen (MF) and its accessories are the important anatomical considerations while placing implants or doing surgical procedures in and around the mandibular premolar region. This study aimed to evaluate the shape, size, and location of mental foramen in dentulous and edentulous patients among the Saudi population using 3D cone-beam computed tomography (CBCT). Methods: In this retrospective study, CBCT scans that were taken between 2015 and 2020 from Riyadh Elm University were retrieved. A total of 180 samples of CBCT (90 dentate and 90 edentulous) were analyzed. Prevalence of different horizontal positions of the mental foramen (P1 to P6) and other additive parameters like the distance from mental foramen to alveolar crest and inferior border of the mandible, along with the mental foramen angle was assessed. The difference in the mental foramen location among dentate and edentulous subjects was assessed. Gender and age variation also was assessed. All the data were statistically analyzed using SPSS. Results: The predominant horizontal position is P4 followed by P3 (59 % in males and 63 % in females at P4, and 15 % each in males and females at P3, respectively). The horizontal position of the mental foramen and gender showed a statistical significance difference, especially at the P3B, P5, and P4 positions. Moreover, a statistically significant difference was seen in the mental foramen to the mandibular inferior border of the mandible (MF_MSB) and the width of mental foramen in the transverse section (MFW). Comparison of the mental foramen among dentate and edentulous subjects showed a statistically significant difference. There was a change in the mental foramen with age. Conclusions: Based on the methodology and sample of this study, it can be concluded that the edentulism only reduced the dimension of the mental foramen opening.
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AlOtaibi, Mlook Ghazi, Ahmad Tawfig, and Hassan Mohamed Abouelkheir. "Evaluation of shape, size, and location of mental foramen in dentulous and edentulous among Saudi population using 3D cone-beam computed tomography." F1000Research 11 (November 30, 2022): 916. http://dx.doi.org/10.12688/f1000research.74434.2.
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Background: Mental foramen (MF) and its accessories are the important anatomical considerations while placing implants or doing surgical procedures in and around the mandibular premolar region. This study aimed to evaluate the shape, size, and location of mental foramen in dentulous and edentulous patients among the Saudi population using 3D cone-beam computed tomography (CBCT). Methods: In this retrospective study, CBCT scans that were taken between 2015 and 2020 from Riyadh Elm University were retrieved. A total of 180 samples of CBCT (90 dentate and 90 edentulous) were analyzed. Prevalence of different horizontal positions of the mental foramen (P1 to P6) and other additive parameters like the distance from mental foramen to alveolar crest and inferior border of the mandible, along with the mental foramen angle was assessed. The difference in the mental foramen location among dentate and edentulous subjects was assessed. Gender and age variation also was assessed. All the data were statistically analyzed using SPSS. Results: The predominant horizontal position is P4 followed by P3 (59 % in males and 63 % in females at P4, and 15 % each in males and females at P3, respectively). The horizontal position of the mental foramen and gender showed a statistical significance difference, especially at the P3B, P5, and P4 positions. Moreover, a statistically significant difference was seen in the mental foramen to the mandibular inferior border of the mandible (MF_MSB) and the width of mental foramen in the transverse section (MFW). Comparison of the mental foramen among dentate and edentulous subjects showed a statistically significant difference. There was a change in the mental foramen with age. Conclusions: Based on the methodology and sample of this study, it can be concluded that the edentulism only reduced the dimension of the mental foramen opening.
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Park, Se-Won, Ra Gyoung Yoon, Hyunwoo Lee, Heon-Jin Lee, Yong-Do Choi, and Du-Hyeong Lee. "Impacts of Thresholds of Gray Value for Cone-Beam Computed Tomography 3D Reconstruction on the Accuracy of Image Matching with Optical Scan." International Journal of Environmental Research and Public Health 17, no. 17 (September 1, 2020): 6375. http://dx.doi.org/10.3390/ijerph17176375.
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In cone-beam computed tomography (CBCT), the minimum threshold of the gray value of segmentation is set to convert the CBCT images to the 3D mesh reconstruction model. This study aimed to assess the accuracy of image registration of optical scans to 3D CBCT reconstructions created by different thresholds of grey values of segmentation in partial edentulous jaw conditions. CBCT of a dentate jaw was reconstructed to 3D mesh models using three different thresholds of gray value (−500, 500, and 1500), and three partially edentulous models with different numbers of remaining teeth (4, 8, and 12) were made from each 3D reconstruction model. To merge CBCT and optical scan data, optical scan images were registered to respective 3D reconstruction CBCT images using a point-based best-fit algorithm. The accuracy of image registration was assessed by measuring the positional deviation between the matched 3D images. The Kruskal–Wallis test and a post hoc Mann–Whitney U test with Bonferroni correction were used to compare the results between groups (α = 0.05). The correlations between the experimental factors were calculated using the two-way analysis of variance test. The positional deviations were lowest with the threshold of 500, followed by the threshold of 1500, and then −500. A significant interaction was found between the threshold of gray values and the number of remaining teeth on the registration accuracy. The most significant deviation was observed in the arch model with four teeth reconstructed with a gray-value threshold of −500. The threshold for the gray value of CBCT segmentation affects the accuracy of image registration of optical scans to the 3D reconstruction model of CBCT. The appropriate gray value that can visualize the anatomical structure should be set, especially when few teeth remain in the dental arch.
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Bermeo Domínguez, Jéssica Belén, Pablo Mateo Morales González, and Manuel Estuardo Bravo Calderón. "Análisis de terceros molares y sus estructuras anatómicas adyacentes mediante CBCT: meta-análisis." Research, Society and Development 10, no. 11 (August 29, 2021): e226101119723. http://dx.doi.org/10.33448/rsd-v10i11.19723.
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El siguiente meta-análisis tiene por objetivo evaluar la posición de los terceros molares mandibulares y sus estructuras anatómicas cercanas (conducto dentario inferior, nervio dentario inferior, cortical lingual, segundo molar inferior). Se realizó mediante un filtro que permite la clasificación y evaluación de diversos artículos científicos, aplicando una búsqueda avanzada a través de bases digitales como PubMed, Cochrane, Science Direct y Wiley, los artículos seleccionados debían ser publicados entre los años 2017 - 2021. Además, detallamos las diferentes clasificaciones utilizadas para evaluar un tercer molar mandibular impactado, que según Winter la posición más prevalente es la mesioangular y según Pell y Gregory existe mayor prevalencia de la Clase 2-B; de igual manera detallamos clasificaciones recientes para molares impactados como son “Liqun Gu” y “Ogüz Boraham”. Estos hallazgos ilustran la importancia de ubicar estructuras cercanas al tercer molar mandibular, conocer diferentes clasificaciones para determinar la posición de un tercer molar impactado y la ventaja que presenta el CBCT en la planificación quirúrgica, evitando así posibles iatrogenias en la práctica clínica.
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Petitpas, Laurent. "De l’utilisation des technologies 3D numériques pour l’analyse, la planification et le rétrocontrôle d’un traitement orthodontique de troubles fonctionnels temporo-mandibulaires." Revue d'Orthopédie Dento-Faciale 53, no. 3 (September 2019): 297–315. http://dx.doi.org/10.1051/odf/2019027.
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Nous souhaitons présenter dans cet article, un cas clinique pédagogique d’une adolescente où les analyses numériques ont été utilisées tout au long de la gestion de sa reprise de traitement. L’arrivée de la tomodensitométrie à faisceau conique (CBCT) et de logiciels informatiques 3D, permet aux orthodontistes de fournir des diagnostics, des simulations et des traitements plus précis. D’un point de vue éthique, il n’est pas acceptable de soigner sans utiliser les méthodes les plus bénéfiques aux patients. En effet, les fichiers DICOM de CBCT renferment une multitude d’informations que nous ne possédions pas auparavant. Des techniques de segmentation par des logiciels de sélection par seuillage nous permettent de visualiser précisément les rapports radiculaires et osseux en 3D. Une connaissance précise de la position des racines dentaires et des bases osseuses améliore la détermination du succès du traitement orthodontique par une surveillance accrue. De nos jours, compte tenu de la rapidité du développement technologique, une combinaison de scanners intra-oraux, d’enregistrements numériques 3D, de multi-bagues individualisés, d’arcs personnalisés, de collage indirect numérique, et d’aligneurs de finition deviendra bientôt une obligation de moyens orthodontiques.
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Petitpas, Laurent. "De l’utilisation des technologies 3D numériques pour l’analyse, la planification et le rétrocontrôle d’un traitement orthodontique de troubles fonctionnels temporo-mandibulaires." Revue d'Orthopédie Dento-Faciale 54, no. 3 (September 2020): 331–48. http://dx.doi.org/10.1051/odf/2020034.
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Nous souhaitons présenter dans cet article, un cas clinique pédagogique d’une adolescente où les analyses numériques ont été utilisées tout au long de la gestion de sa reprise de traitement. L’arrivée de la tomodensitométrie à faisceau conique (CBCT) et de logiciels informatiques 3D, permet aux orthodontistes de fournir des diagnostics, des simulations et des traitements plus précis. D’un point de vue éthique, il n’est pas acceptable de soigner sans utiliser les méthodes les plus bénéfiques aux patients. En effet, les fichiers DICOM de CBCT renferment une multitude d’informations que nous ne possédions pas auparavant. Des techniques de segmentation par des logiciels de sélection par seuillage nous permettent de visualiser précisément les rapports radiculaires et osseux en 3D. Une connaissance précise de la position des racines dentaires et des bases osseuses améliore la détermination du succès du traitement orthodontique par une surveillance accrue. De nos jours, compte tenu de la rapidité du développement technologique, une combinaison de scanners intra-oraux, d’enregistrements numériques 3D, de multi-bagues individualisés, d’arcs personnalisés, de collage indirect numérique, et d’aligneurs de finition deviendra bientôt une obligation de moyens orthodontiques.
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Ayob, MAM, JS Md Jasin, MK Suparman, and NH Reduwan. "Comparison between Digital Panoramic Radiography and Cone-Beam Computed Tomography in Measuring Presurgical Dental Implant Vertical Height at Posterior Mandible." Compendium of Oral Science 9, no. 1 (January 11, 2022): 8. http://dx.doi.org/10.24191/cos.v9i1.16888.
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Objectives: This study aims to evaluate the reliability of panoramic radiograph in comparison to cone beam computed tomography for posterior mandibular pre-implant assessment. Materials and Methods: A retrospective evaluation of the panoramic (PAN) and CBCT images in complete, partially edentulous, and dentate patients was conducted on 66 cases for presurgical dental implant assessment. Assessment of the vertical bone height was conducted by dividing the posterior mandible region into anterior (first premolars to second premolars) and posterior (first molars to second molars) segments. The average mesiodistal crown dimensions from each segment were measured as a midpoint. The reference point to measure the vertical bone height was established from the alveolar crest to the superior border of mandibular canal. Therefore, the measurement will begin at the midpoint of total mesiodistal crown dimension of each segment from the alveolar crest to the superior border of mandibular canal. All measurements were independently performed by two observers thrice on each modality. Results: A paired comparison between PAN and CBCT images in measuring the presurgical dental implant vertical height from alveolar crest to the superior border of mandibular canal (paired t-tests) showed statistically significant difference in the mean difference of vertical bone height at each region between PAN and CBCT (p<0.001). Conclusion: PAN radiograph provides sufficient information for presurgical implant assessment at the posterior mandible in routine cases or during the unavailability of CBCT at the clinic. However, CBCT remains the best imaging modality for presurgical implant assessment as it has a minimal magnification error.
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Kunte, Varun Rajeev, Ajay Ramesh Bhoosreddy, Seema Ajay Bhoosreddy, Atul Ashok Pandharbale, Manila Rajaram Shinde, and Bhushan Sukhdeo Ahire. "Alveolar Bone Dimensions of Mandibular Posterior Teeth using Cone Beam Computed Tomography: A Pilot Study." Journal of Contemporary Dentistry 6, no. 1 (2016): 9–14. http://dx.doi.org/10.5005/jp-journals-10031-1135.
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ABSTRACT Aim The aim of this study was to analyze bone dimensions of the dentate posterior mandible using cone beam computed tomography (CBCT). Objectives The objectives of this study were • To measure thickness of buccal and lingual bone walls in mandibular posterior teeth using CBCT. • To measure alveolar bone width in mandibular posterior teeth using CBCT. Materials and Methods Ten CBCT scans were included in the study (n = 65 teeth). Thicknesses of buccal and lingual walls were measured at measurement point 1 (MP1) and measurement point 2 (MP2). Alveolar width was assessed at most coronal detected alveolar bone (BW1) and at superior border of mandibular canal (BW2). Vertical distance between BW1 and BW2 was measured (H). Data were tabulated and results were statistically analyzed using unpaired t test. Results The study showed that there was an increase in bone wall thickness from 1st premolar to 2nd molar for buccal and lingual alveolar plates. Lingual bone walls were thicker than buccal bone walls at MP1 and MP2 for all teeth. Bone width for premolars was considerably less than bone width of molars. Conclusion Careful preoperative analysis using CBCT is important to assess need of bone augmentation procedures. As the bone thickness and width in the molar region is more adequate, prognosis of implants placed in molar region may be better. Clinical significance Analysis of bone dimensions is of utmost importance for successful outcome of bone augmentation procedures in implant treatment. How to cite this article Kunte VR, Bhoosreddy AR, Bhoosreddy SA, Pandharbale AA, Shinde MR, Ahire BS. Alveolar Bone Dimensions of Mandibular Posterior Teeth using Cone Beam Computed Tomography: A Pilot Study. J Contemp Dent 2016;6(1):9-14.
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Talaat, W. M., S. W. Al Bayatti, D. E. Dohair, M. A. Zobeidi, and K. M. Hannouneh. "A CBCT measurement of the mandibular buccal bone thickness in dentate adults." Oral Surgery 8, no. 1 (September 11, 2014): 38–41. http://dx.doi.org/10.1111/ors.12123.
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Van Doorne, Luc, Pedram Gholami, Jan D’haese, Geert Hommez, Gert Meijer, and Hugo De Bruyn. "Three-Dimensional Radiographic Outcome of Free-Handed Flaplessly Placed Mini Dental Implants in Edentulous Maxillae after 2-Years Function." Journal of Clinical Medicine 9, no. 7 (July 5, 2020): 2120. http://dx.doi.org/10.3390/jcm9072120.
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Background: Free-handed, flaplessly placed mini dental implants (MDIs) are a valuable, more affordable and minimally invasive treatment to support overdentures in fully edentulous jaws, especially for medically compromised patients. However, critical 3D radiographic evaluation is lacking. This multicenter prospective case series assessed clinical outcome and carried out 3D- cone-beam computerized tomography (CBCT) analysis of free-handed flaplessly placed one-piece maxillary MDIs by an experienced maxillofacial surgeon. Methods: Thirty-one patients suffering from an ill-fitting maxillary denture relating to compromised bone volume (as confirmed on CBCT), with a dentate mandible, were selected. They received 5–6 MDIs free-hand flaplessly placed and mentally guided with preoperative CBCT. Final connection and attachment activation took place six months later. After two years each implant was individually assessed with CBCT for perforations on eight sites. Implant survival, prosthetic failure, clinical stability and sinus/nasal complaints were registered after three years. Results: 32/185 (17.3%) MDIs failed during the provisional loading with non-activated attachments; 17 replacements in 10 patients were performed. Of the 170 actively loaded 170 MDIs, 82.3% survived and 27/31 prostheses (87%) were fully functional. In total 98/170 MDIs showed no perforation. Based on 1360 CBCT observations, 231 perforations (16.9%) were registered. Of most perforations 37 (25%) were observed at the apical tip and 37 were positioned (21%) into the sinus/nasal cavity, although without clinical complaints. Conclusions: Given the compromised population, the minimally invasive procedure and the low treatment cost involved, a failure rate of 17% is substantial, however clinically acceptable given the critical bone condition. However, even in experienced surgical hands, freehanded and flapless placement yield a high risk for implant perforation, although this did not necessarily lead to complications.
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Gonçalves, Luiz Felipe Fernandes, Marcelo Augusto Oliveira de Sales, Yuri Barbosa Alves, and Lucas Rodrigues Pinheiro. "Anatomical evaluation of the nasopalatine canal using CBCT (Cone Beam Computed Tomography): Method validation in open source software." Research, Society and Development 9, no. 11 (November 11, 2020): e1829119672. http://dx.doi.org/10.33448/rsd-v9i11.9672.
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Objective: Development and validation (using open source software) of a method for volumetric and linear assessment of the nasopalatine channel (NPC) using cone beam computed tomography (CBCT). Materials and methods: This was an observational, cross-sectional study of 276 CBCTs. Acquisition was performed on a Prexion 3D computerized tomography scanner (manufacturer), using voxels of 0.08 mm and 0.14 mm, (with FOV at 5 and 12 cm). The images were compiled and divided in accordance with gender and the dental condition of the maxilla. Evaluation took place on a MacBook Pro computer using the Horos Project program (Version 3.3.5). Linear measurements and NPC volumetric evaluations were performed after correcting the orientation axes (sagittal and axial). The length and ROI volume tools were used. Results: The average age for men was 60.15 ± 11.94, for women it was 59.95 ± 10.63. Respectively, for men and women, the average NPC volume values were: 68.59 mm3 and 59.37 mm3 (p = 0.032), for length they were 10.08 mm and 8.84 mm (p = 0.000). Of the dentate participants, the NPC averages for volume for men and women were: 71.01 mm3 and 57.18 mm3 (p = 0.007), for length they were 10.26 mm and 9.14 mm (p = 0.001). In the edentulous, the average NPC lengths were 9.79 mm (men) and 8.37 mm (women) (p = 0.005). Conclusion: For linear and volumetric nasopalatine channel assessment, the post-processing method used in the Horos software was considered precise and easy-to-use.
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Sghaireen, Mohammed G., Kumar Chandan Srivastava, Deepti Shrivastava, Kiran Kumar Ganji, Santosh R. Patil, Anas Abuonq, Mohammed Assayed Mousa, et al. "A CBCT Based Three-Dimensional Assessment of Mandibular Posterior Region for Evaluating the Possibility of Bypassing the Inferior Alveolar Nerve While Placing Dental Implants." Diagnostics 10, no. 6 (June 14, 2020): 406. http://dx.doi.org/10.3390/diagnostics10060406.
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A high rate of nerve injury and related consequences are seen during implant placement in the posterior mandibular arch. An approach has been proposed to avoid nerve injury by dodging the inferior alveolar nerve (IAN) while placing an implant. A prospective study with a total of 240 CBCT (cone beam computed tomography) images of patients with three dentate statuses, namely, edentulous (group I), partially edentulous (group II) and dentate (group III) were included in the study. The nerve path tracing was done on CBCT images with On-demand 3D software. The three dimensions, i.e., the linear distance from the outer buccal cortical plate to the inferior alveolar nerve (BCPN), linear distance from the outer lingual cortical plate to the inferior alveolar nerve (LCPN) and linear distance from the midpoint of the alveolar crest to the inferior alveolar nerve (ACN) were assessed. The data were presented and analyzed between variables using one-way ANOVA and independent t-test in SPSS version 21.LCPN of the right 1st premolar region (p < 0.05) was significantly different among the groups with edentulous subjects recorded with the minimum value (6.50 ± 1.20 mm). Females were found to have significantly (p < 0.05) less available bone (6.03 ± 1.46 mm) on the right side of the mandibular jaw compared to males in edentulous group of patients. On comparing age groups for partially edentulous subjects, LCPN of the right 1st premolar region had significantly (p < 0.05) less available bone (6.03 ± 0.38 mm) in subjects with age ≥54 years. The IAN follows a lingual course in the molar region and later flips to the buccal side in the premolar region. The LCPN dimension in the 1st and 2nd premolar region was found to be more than 6 mm irrespective of age, gender and side of the jaw. Thus, it can be considered as a suitable site for placing implants while bypassing the IAN with CBCT assessment remaining as the mainstay in the pre-surgical phase.
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Elgaddari, Fathi, and Jasim Albandar. "Palatal Bone Wall Thickness in Anterior Maxillary Sites: CBCT Assessments in Dentate Patients." International Journal of Oral & Maxillofacial Implants 37, no. 6 (November 2022): 1169–75. http://dx.doi.org/10.11607/jomi.9674.
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Zhang, Wenjian, Justin Tullis, and Robin Weltman. "Cone Beam Computerized Tomography Measurement of Alveolar Ridge at Posterior Mandible for Implant Graft Estimation." Journal of Oral Implantology 41, no. 6 (December 1, 2015): e231-e237. http://dx.doi.org/10.1563/aaid-joi-d-14-00146.
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Damaging the inferior alveolar nerve (IAN) is the most serious complication when harvesting an autogenous graft from posterior mandible. The objective of this study was to use cone beam computerized tomography (CBCT) to measure dimensions of the alveolar ridge in the posterior mandible for estimation of a safe graft size, and then analyze how it is related to the gender, age, and dentition status of subjects. CBCT scans were screened to include 59 subjects without interfering pathologies. Alveolar height was measured from the alveolar crest to superior border of IAN and also to the inferior border of the mandible. Alveolar width (from buccal to lingual cortical plates) and buccal bone thickness (from buccal cortical plate to mandibular molar mesial root buccal surface) were measured at the coronal, middle, and apical thirds divided from the alveolar crest to the IAN. It was found that males and dentate sites had larger alveolar dimensions than did females and edentulous sites, respectively. Bone volume did not correlate significantly with age. Buccal bone thicknesses increased from coronal to apical and from the first to the third molar generally. A larger bone graft could be harvested from male than female patients, with a mean harvestable graft dimension (height × width in mm) for male was 15.5 × 3.2, and for female was 14.1 × 2.9. In conclusion, males and dentate arches demonstrate larger alveolar volumes than do females and edentulous regions, respectively. Larger alveolar grafts can be harvested from males compared to the females. Age does not seem to affect alveolar dimension/graft volume.
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Pelé, Antoinette, Pierre-Alexandre Berry, Charles Evanno, and Fabienne Jordana. "Evaluation of Mental Foramen with Cone Beam Computed Tomography: A Systematic Review of Literature." Radiology Research and Practice 2021 (January 6, 2021): 1–10. http://dx.doi.org/10.1155/2021/8897275.
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Purpose. The aim of this systematic review is to assess whether the anatomy of mental foramen is precisely evaluable with cone beam computed tomography (CBCT) before implantation in humans. Methods. A systematic review was carried out to evaluate the anatomy of mental foramen (size, position, symmetry, anterior loop, and accessory mental foramen or multiple mental foramina). According to Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines, an electronic search of three databases (Medline, Web of Science, and Cochrane Library) was undertaken until June 2020 and was supplemented by manual searching. Two reviewers will independently perform the processes of study inclusion, data extraction, and quality assessment. Systematic reviews, studies about children, and case reports were excluded. Only studies using CBCT to do preoperative evaluation were selected. Results. From 728 potentially eligible articles, 72 were included in the qualitative analysis and quantitative synthesis. This systematic review provided an assessment of the anatomy of the mental foramen. The mental foramen was located mostly between the two premolars (between 50.4% and 61.95%) or apically to the second premolar (from 50.3% to 57.9%). The mean diameter of the mental foramen was bigger in males than in females; the difference between them could reach 0.62 mm. The anterior loop seemed to be longer in males (between 0.87 ± 1.81 and 7.25 ± 2.02 mm) than in females (between 0.81 ± 1.18 and 6.52 ± 1.63 mm) and with the presence of teeth (from 0.91 ± 1.18 to 2.55 ± 1.28 for dentate people and from 0.25 ± 0.61 to 2.40 ± 0.88 mm for edentate population). The anterior loop and the accessory mental foramina were detected more frequently with CBCT than panoramic X-ray: only between 0.0 and 48.6% AMFs detected with CBCT were also seen with panoramic images. Clinical Significance. The mental foramen (MF) is an important landmark for local anesthesia and surgical and implantology procedures. Its location, morphology, and anatomical variations need to be considered to avoid mental nerve injury. The aim of this review is to evaluate the mental foramen using CBCT through a systematic literature review to improve knowledge of this complex area for the clinician.
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Raju, Navin, Wenjian Zhang, Aniket Jadhav, Andreas Ioannou, Sridhar Eswaran, and Robin Weltman. "Cone-Beam Computed Tomography Analysis of the Prevalence, Length, and Passage of the Anterior Loop of the Mandibular Canal." Journal of Oral Implantology 45, no. 6 (December 27, 2019): 463–68. http://dx.doi.org/10.1563/aaid-joi-d-18-00236.
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When placing implants in the anterior mandible, it is important to avoid damaging the mandibular nerve and its terminal extensions. The objective of this study was to determine the prevalence, length, and passage of the anterior loop of the mandibular canal, as well as the quantity of alveolar bone that is coronal to the canal, to help with implant placement in the anterior mandible. Cone-beam computerized tomography (CBCT) scans of 124 patients with 248 hemi-sections were evaluated. Anterior loop prevalence was determined using reconstructed panoramic and cross-sectional views; length was measured as the distance between the most mesial aspect of the mental foramen to the most mesial aspect of the anterior loop on cross-sectional views. The bucco-lingual position of the anterior loop inside the mandible and the apico-coronal dimensions of the alveolar bone above it were measured on cross-sectional views to determine the passage of the anterior loop and the bone available coronally, respectively. The effects of sex, age, side, and dentate status on the prevalence and length of the anterior loop were analyzed statistically. Prevalence of the anterior loop at the patient and hemi-section levels was 25% and 24%, respectively, and its median length was 1.63 mm (range, 0.52–3.92 mm). The anterior loop was apical to the mental foramen and mostly located within the buccal or middle one-third of the alveolar ridge, with an average height of coronal alveolar bone of 17.12 mm. Sex, age, side, and dentate status did not affect anterior loop prevalence and length. In conclusion, because of great variation, a case-by-case CBCT evaluation of the anterior loop is necessary before placing implants in the anterior mandible.
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Lopes, Sergio Lucio Pereira de Castro, Iara Santos Quadros da Costa Donato, Afonso Celso Souza de Assis, Mari Eli Leonelli de Moraes, Luiz Roberto Coutinho Manhães Jr, and Thiago De Oliveria Gamba. "Anatomic characterization of mentual foramen in dentate and edentulous regions with Cone Beam Computed Tomography (CBCT)." Brazilian Dental Science 19, no. 4 (November 29, 2016): 49. http://dx.doi.org/10.14295/bds.2016.v19i4.1305.
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Shemtov-Yona, Keren. "Quantitative assessment of the jawbone quality classification: A meta-analysis study." PLOS ONE 16, no. 6 (June 16, 2021): e0253283. http://dx.doi.org/10.1371/journal.pone.0253283.
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Aim Bone quality is evaluated using bone density for qualitative classification, a characteristic that may be delicate to evaluate. Contemporary implantology that relies on modern measurement techniques, needs a more quantitative estimate of the bone quality. Materials and methods PubMed and EMBASE databases were searched with no time restriction. Clinical and radiographic studies reporting on alveolar ridge dimensions and its parameters in different areas of the dentate and edentulous jaws were included. A meta-analysis was performed using random effect models to report a combined mean for alveolar ridge and its parameters. Meta regression statistical tests were performed in order to identify differences in those outcome parameters. Results 30 studies were included. The majority of the selected studies (total of 27) used live human subjects and CBCT to analyze alveolar ridge dimensions and its parameters. Using the combined mean obtained from the meta-analysis, a typical portrait of the alveolar ridge was constructed, and a geometrically based quantitative bone classification proposed. The quantitative classification was found to match the existing qualitative classification. Conclusion A geometry-based analysis was constructed that yields valuable insights on the bone type based on its components and on the dynamics of the dentate / edentulous states.
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Loma Salcedo, Humberto, and Nelly Erlinda Huasco-Huarcaya. "Grado de fiabilidad de la evaluación del análisis de Bolton en modelos virtuales tridimensionales versus modelos de yeso. Una revisión." Revista Científica Odontológica 11, no. 2 (June 30, 2023): e155. http://dx.doi.org/10.21142/2523-2754-1102-2023-155.
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Introducción: El análisis de Bolton se emplea para determinar anomalías con respecto a la masa dentaria, con fines de diagnóstico y planificación del tratamiento, la posibilidad de utilizar un método digital, que fue introducido y probado para medir el tamaño del diente mesiodistal, es una alternativa atractiva; además, la creciente aceptación de la tecnología dental digital, generó que los modelos de estudio digitales se vuelvan populares en entorno a la ortodoncia. Objetivo: evaluar el grado de fiabilidad de la evaluación del análisis de Bolton en modelos virtuales tridimensionales versus modelos de yeso por medio de una revisión de la literatura. Materiales y métodos: Se realizó una búsqueda en las principales bases de datos de la literatura científica internacional sobre ciencias de la salud: Medline, a través de PubMed, SciELO, Lilacs, Embase. Se incluyeron artículos de revisión publicados entre el año 2000 hasta octubre 2021. Resultados: El escáner de sobremesa fue la mejor opción para la digitalización de modelos dentales, pero esto no quita mérito alguno al CBCT y al escáner láser intraoral, que siguen siendo una opción asequible válida para la digitalización de modelos 3D con resultados que se encuentran dentro del rango “clínicamente aceptable”. Conclusiones: Los modelos digitales 3D generados con escáneres intraorales y escáneres extraorales son confiables y precisos en comparación con las impresiones convencionales y ahorran tiempo. En la mayoría de los casos, se hallaron diferencias estadísticamente significativas, pero de poca relevancia clínica.
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Okiriamu, Andrew, Fawzia Butt, Florence Opondo, and Fredrick Onyango. "Morphology and Variant Anatomy of the Mandibular Canal in a Kenyan Population: A Cone-Beam Computed Tomography Study." Craniomaxillofacial Research & Innovation 8 (January 2023): 275284642311827. http://dx.doi.org/10.1177/27528464231182775.
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Study Design Descriptive cross-sectional study. Objective The mandibular canal (MC) exhibits surgically significant anatomical variations in its course and terminal segment among different ethnic groups. The aim of this study was to document a surgically relevant position of the MC, its variants, and related anatomical structures in dentate patients from a select Kenyan population. Methods 351 hemi mandibular cone-beam computed tomography (CBCT) scans from 202 patients were used to evaluate the MC and mental foramen (MF) for normal morphology, anatomical variations, and their linear relationship to various reference points. Results The most frequently encountered course of the MC was the progressive descent type seen in 241 (68.7%) scans. Accessory MC were observed in 15 (4.3%) scans. Accessory MF were observed in 29 (8.3%) scans. The mean diameter of the MC was 3.36 ± .39 mm. The orientation of the MC was more lingual towards the angle of the mandible and more buccal towards the MF. The most frequent position of the main MF in relation to the second premolar was anterior (53.3%). The average distance from the MF to the inferior border of the mandible was 12.17 ± 1.91 mm. The anterior loop of the mental nerve was observed in 18 (5.1%) scans and its mean length was 4.83 ± .89 mm. Conclusions Our study revealed significant variations in the position, size, and course of the MC and MF. This knowledge should assist oral surgeons to avoid inadvertent injury to the inferior alveolar neurovascular bundle in the local population.
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Fouda, Shaimaa M., Passant Ellakany, Marwa Madi, Osama Zakaria, Fahad A. Al-Harbi, and Maha El Tantawi. "Do Morphological Changes in the Anterior Mandibular Region Interfere with Standard Implant Placement? A Cone Beam Computed Tomographic Cross-Sectional Study." Scientific World Journal 2020 (December 18, 2020): 1–7. http://dx.doi.org/10.1155/2020/8861301.
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Objective. To determine the morphological features in the anterior mandibular region, the presence of lingual foramen and canal dimensions in Saudi subjects that would interfere with standard implant placement. Methods. CBCT scans of patients seeking implant treatment were examined. Based on the dentition status, patients were categorized into edentulous (group I) and dentulous (group I). On the panoramic view, the distance between the two mental foramina was divided into vertical segments of 10 mm width. In each segment, vertical bone height and buccolingual thickness at three levels (alveolar crest, 5 mm, and 10 mm apical to the crest) were assessed. The lingual foramen prevalence and canal features were assessed as well. Comparisons between the two groups regarding the assessed parameters were performed using the t-test. The percentage of edentulous mandibles with thickness <6 mm corresponding to the standard implant diameter was also calculated. Results. Following the inclusion and exclusion criteria, group I consisted of 45 subjects and group II comprised 26 subjects. Bone height and thickness at the crestal level were significantly less in edentulous (I) than dentate mandibles (II) ( P < 0.0001 ). The lingual foramen was detected in 90% of patients. In both groups, males had significantly greater mandibular height than females ( P = 0.02 and 0.005). At the crestal level, the thickness was <6 mm in 50% of the anterior mandibular segments. Conclusion. Half of the edentulous patients may receive normal size implants in the anterior interforaminal segments, while the other half will be limited to narrow implants (3.5 mm and less). The lingual foramen location, canal size, and position may represent another limitation for implant placement in that segment.
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Limardo, Andrés C., Belén De Fazio, Francisco Lezcano, Rodrigo Vallejo, Nicolás Abud, and Luis A. Blanco. "CONDUCTO ALVEOLAR INFERIOR. CORRELATO ANATOMO-IMAGENOLOGICO E IMPLICANCIA EN LOS PROCEDIMIENTOS QUIRURGICOS DE MANDIBULA. Inferior alveolar canal. Imaginological anatomical correlation and implication in jaw surgical procedures." Revista Argentina de Anatomía Clínica 8, no. 1 (March 28, 2016): 18–28. http://dx.doi.org/10.31051/1852.8023.v8.n1.14204.
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Introducción: Las lesiones iatrogénicas del nervio dentario inferior son complicaciones documentadas de diversos procedimientos quirúrgicos en la mandíbula. Debido a ello se justifica una descripción más detallada con referencias morfométricas de dicho conducto, como así también una correlación con imágenes. Materiales y métodos: Se realizó un estudio descriptivo observacional con una muestra de 44 hemimandíbulas secas y 100 tomografías computadas de mandíbulas de pacientes al azar. Se realizaron mediciones del foramen mandibular y mentoniano con respecto a bordes mandibulares. Se hicieron cortes en la rama y el cuerpo con sus respectivas mediciones. Se utilizaron Tomografías Computadas Cone Beam 3D de 100 pacientes las cuales fueron procesadas por el programa Compudent Navigator 3D®. Utilizando este programa se pudieron realizar las mismas mediciones que en los preparados anatómicos, como así también la reconstrucción del conducto. En una segunda etapa se realizó una correlación entre los valores morfométricos del estudio anatómico y se comparó con los estudios por imágenes (TC con reconstrucción 3D Dental Scan). Resultados: Se expresaron en tablas con diversas variables. Discusión: Los textos clásicos de anatomía y los libros de cirugía de la especialidad describen en detalle el recorrido y las relaciones del CAI, y presentan datos morfométricos pero no lo hacen en poblaciones locales. Como conclusión podemos afirmar que, tomando como punto de partida la anatomía y correlacionándola con la imagenologia, podemos llegar a evitar lesiones del nervio alveolar inferior en el transcurso de diversos procedimientos realizados en la mandíbula. Introduction: Iatrogenic inferior alveolar nerve injuries are documented complications of different surgical procedures in the jaw. It should justify a more detailed description with morphometric references of the duct and a correlation with images. Materials and method: A descriptive observational study with a sample of 44 dry hemijaws and 100 CT scans of patients. Measur-ements of the mandibular foramen and mental foramen with respect to jaw edges were made. Cuts in the branch and body were made with their respective measurements. Cone Beam Computed Tomography 3D (CBCT 3D) of 100 patients were processed by the Compudent Navigator 3D® program. The use of this program permited the same measurements done in the cadaveric jaws and the reconstruction of the duct. In a second stage we performed a correlation between the anatomic morphometric values compared with imaging studies (CT Dental Scan with 3D reconstruction) Results: They were shown in tables with different variables. Discussion: The classic texts of Anatomy and surgery books describe in detail the pathway and relations of the duct, and present morphometric data but not in local population. We may conclude that it is possible to avoid injuries of the inferior alveolar nerve during jaw surgery by considering the anatomy and its correlation with images.
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N J, Nagaraj, Ravikumar Nesamani, Mahalaxmi Sekar, and Pallavi S. "Cone-beam Computed Tomography Evaluation of Non-surgical management of a Large Periapical Lesion using Calcium hydroxide intracanal medicament: A 1-year follow-up case report." Research Journal of Pharmacy and Technology, October 21, 2022, 4701–4. http://dx.doi.org/10.52711/0974-360x.2022.00789.
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This case report aims to assess the healing of a large periapical lesion non-surgically using Calcium hydroxide (CH) with the aid of Cone Beam Computed Tomography (CBCT). A 28-year-old female patient presented with pain and swelling in the lower anterior teeth (31, 32, 41, 42) (Federation Dentaire Internationale (FDI) tooth notation system). Patient history and pre-operative radiographic examination revealed incomplete root canal treatment in relation to 31, 32, 41, 42 with periapical abscess. During the first visit, the access cavity was modified, followed by determination of the working length and biomechanical preparation. In the present case report, (CH) intracanal medicament(ICM) was placed in the canals for 2 weeks, and the process was repeated until the canals were dry. Once the canals were dry and the teeth became asymptomatic, obturation was performed. Permanent coronal seal was provided using composite restorative material. One year periodic follow-up was carried out to assess the healing of the periapical lesion, following which, post-operative healing was assessed with the help of CBCT- Periapical Index (CBCT-PAI) and was compared with the pre-operative CBCT-PAI. Regression of the lesion and formation of the trabecular pattern of the bone were noted. Intracanal medication with calcium hydroxide complemented the instrumentation with irrigation and optimal disinfection of the root canal system. In this case report, the use of CBCT as a diagnostic tool helped in the accurate measurement of periapical lesion size.
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HASSAM ANJUM MIR, Saima Shafiq, Maheen Khan, Sumbal Mukhtar, Ali Asif, and Qayyum Akhter. "Relationship of Maxillary Sinus and Maxillary First Molar Root Using Cone Beam Computed Tomography." Journal of Islamabad Medical & Dental College 12, no. 1 (April 19, 2023). http://dx.doi.org/10.35787/jimdc.v12i1.676.
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Background: Cone beam CT (CBCT) is an advancement of conventional CT that uses a divergent pyramidal or conical X-ray beam for imaging the craniofacial complex. Studies on the maxillary sinus and its relationship with the roots present within its close proximity are mostly based on computed tomography imaging and rarely being based on cone-beam computed tomography (CBCT). This study aims to determine the relationship of maxillary sinus and the mesiobuccal root of maxillary first molar using cone beam computed tomography (CBCT).
Methods: The study was conducted in Armed Forces Institute of Dentistry (AFID) from Sept, 2019 to Feb, 2020. 142 CBCTs were studied in the duration of six months. The distance between the maxillary mesiobuccal root and floor of maxillary sinus was measured using the built in software. The data collected was analyzed using SPSS 23. p-value of <0.005 was considered significant.
Results: The mean distance was -0.85 mm ± 2.56 on left side and -0.74mm ± 2.40 on right side. There was no significant difference between left and right side. The correlation between age and left and right-side measurements was statistically significant, p-value 0.000.
Conclusion: The relationship of maxillary sinus and the mesiobuccal root of maxillary first molar is significant. The study shows that in dentate healthy patients, the maxillary mesiobuccal molar root is nearly in contact with the sinus floor. These findings lead to the conclusion that performing surgical procedures in maxillary molar region may invariably lead to sinus perforation if one is not care full.
Keywords: Cone beam computerized tomography, Dental implant, Maxillary sinus, Molar
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Torkian, Maryam, Azade Torkzadeh, and Shahab Etemadi. "Evaluation of Nutrient Canals in the Anterior Region of the Mandible in Patients Referring to Radiology Department of Islamic Azad University of Isfahan by Using Cone-Beam Computed Tomography." Journal of Isfahan Dental School, November 30, 2022. http://dx.doi.org/10.18502/ijds.v18i3.11236.
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Introduction: The nutrient canals in the anterior region of the mandible are derived from the incisive branch of the inferior neurovascular bundle the damage of which in any surgery could lead to more hemorrhage and postoperative paresthesia. Evaluating the incidence and anatomical location of these canals using dental CBCT is the purpose of this study.
Materials & Methods: In this study, the CBCT scans of 196 patients- consist of 89 women and 107 men with a mean age of 49.1 from the archive of the radiology department of Isfahan Islamic Azad University were scrutinized. Sex, location, number, size (mesial-distal and buccal-lingual diameter), shape (round or ovoid) of nutrient canals were recorded. Results were analyzed using Mann-Whitney, Independent T-test, and Kruskal-Wallis test. (p value < 0.05).
Results: There are nutrient canals in 83.6% of the cases, in most of the cases (73.4 %), two nutrient canals in the anterior region of the mandible were detected. The independent t test showed that the average mesial-distal (p value = 0.48) and buccal-lingual (p value = 0.40) nutrient foramen diameter in between dentate and edentulous ones had no meaningful relation. The number of nutrient canals in the anterior region of the mandible in dentate was statistically higher than the edentulous ones (p value < 0.001).
Conclusion: There were nutrient canals present in most of the cases. There was no significant correlation between age and the number of nutrient canals in the anterior region of the mandible. There was no significant correlation between sex and the number of nutrient canals in the anterior region of the mandible. There was significant correlation between dentate and edentulous ones and the number of nutrient canals in the anterior region of the mandible. Preoperative knowledge of these findings via CBCT scans would be useful to prevent the complications of mandibular surgery.
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Ghoncheh, Zahra, Behrang Moghaddamzadeh, Hanieh Kaviani, Golshan Jamali, and Maral Feizi. "Measurement of buccal cortical plate thickness in the mandible of dentate adults in an Iranian population using cone-beam computed tomography." Journal of Craniomaxillofacial Research, January 18, 2020. http://dx.doi.org/10.18502/jcr.v6i2.2265.
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Objectives: This study aimed to measure the buccal cortical plate thickness in the mandible of
dentate adults in an Iranian population using cone-beam computed tomography (CBCT).
Materials and Methods: Eighty CBCT images were evaluated in this study using NNT
Viewer 6.0 software. Images had high-resolution and had been taken by NewTom CBCT scanner
with 11 x 8cm field of view. Measurements were made using the digital ruler of the software with
0.1mm accuracy. All analyses were performed by two observers: an oral and maxillofacial radiologist
and a general dentist. In case of disagreement between the observers, measurements were
repeated and the mean value was used for analysis. Data were analyzed by using linear regression.
Results: The results showed that the thickness of buccal cortical plate increased from the canine
towards the second molar site. The second molar site had the greatest density and thickness. Gender
had a significant effect on the thickness of buccal cortical plate (P<0.05) but the effect of right/
left quadrant was not significant (P>0.05). The effect of age on this thickness was insignificant in
some (P>0.05) and significant (P<0.05) in some other areas such that by an increase in age of patients,
this thickness decreased (i.e. at the apex of canine, second premolar and second molar teeth).
Conclusion: The buccal cortical plate thickness of the mandible increases from the anterior
towards the posterior region, and the second molar area has the greatest thickness and density
suitable for placement of orthodontic mini-implants or harvesting autogenous grafts.
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Jušić, Meris, Fuad Julardžija, Selma Jakupović, and Adnan Šehić. "Procjena dentalne dobi metodom konusne kompjuterizirane tomografije." Konferencija radioloških tehnoogija s međunarodnim učešćem - CORT, 2022, 29–30. http://dx.doi.org/10.17532/cort.2022.1.15.
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Uvod: U današnje vrijeme kao glavni alat za procjenu starosti u forenzičkoj medicine koriste se radiološki snimci. Pojavom kompjuterizirane tomografije konusnim snopom omogućen je 3D uvid u anatomske strukture zuba, a samim tim unaprijeđen i olakšan proces identifikacije, obzirom da su zubi najtvrđi dio ljudskog tijela i kao takvi se često koriste za procjenu starosti. Cilj rada je ispitati radnu hipotezu prema kojoj dentalna dob procijenjena metodom volumetrijske analize pulpe kompjuteriziranom tomografijom konusnim snopom odgovara hronološkoj dobi ispitanika. Metode: Kroz ovu prospektivnu pilot studiju analizirani su CBCT snimci bosanskohercegovačke populacije kod 30 ispitanika (17 žena i 13 muškaraca). Snimci su u .DICOM formatu importovani u ITK Snap program pomoću kojeg je izmjeren volumen pulpe zuba interkaninog sektora gornje i donje vilice, i to za očnjake, centralne i lateralne sjekutiće. Kriteriji za uključivanje podrazumijevali su odsustvo kalcifikacije, artefakata i bez većih restauracija kod navedenih zuba. Podaci o svakom mjerenju korelirani su sa dobi i spolom ispitanika. Statistička obrada i interpretacija prikupljenih podataka urađena je pomoću statističkog programa SPSS. Rezultati: Provedeno istraživanje je potvrdilo da se volumen pulpe zuba smanjuje sa godinama starosti. Dob ispitanika je varirala između 16 i 54 godine. Najmanji volumen pulpe izmjeren je kod centralnog sjekutića mandibule, a najveći kod maksilarnog očnjaka. Volumen pulpe zuba gornje vilice općenito je bio veći nego kod zuba donje vilice. Kod žena je zabilježen manji volumen pulpe zuba u odnosu na volumen pulpe kod muškaraca. Zaključak: Kod svih analiziranih zuba postojala je značajna korelacija između dobi i volumena pulpe zuba, sa jačom korelacijom kod muškaraca. Studija je pokazala da se dob može procijeniti na osnovu poznavanja volumena pulpe zuba interkanine regije, uz uspostavljanje matematičkog modela za koji je potreban veći broj ispitanika.
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Soman*, cristalle, Alanoud Almuhrij, Alghusen Alghusen, Faizal Abdulrahman Alsubaie, Manal Aljamal, and Rasha Alrasheed. "CBCT ANALYSIS OF ALVEOLAR BONE DIMENSIONS IN MANDIBULAR POSTERIOR TEETH: A PRELIMINARY STUDY." INDIAN JOURNAL OF APPLIED RESEARCH, October 1, 2019, 1–3. http://dx.doi.org/10.36106/0600491.
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OBJECTIVES: Extraction of mandibular posterior teeth followed by immediate implant placement is considered as an optimal technique of immediate prosthetic rehabilitation. The analysis of alveolar bone dimensions with Cone Beam Computerized Tomography prior to implant placement is a prime determinant in treatment planning. Hence this preliminary study was conducted to analyze the alveolar bone dimensions in dentate mandibular posterior teeth to evaluate the available bone which can be utilized for immediate implant placements. MATERIALS AND METHODS: Retrospective data of 200 cases of full volume CBCT was procured from Riyadh Elm University (REU) database and reviewed for eligibility. Atotal of 10 cases were included in the study. Scans were assessed for thickness of buccal and lingual walls at 4mm below the CEJ (MP1) and at midroot level (MP2). Alveolar width was assessed at most coronal point on alveolar bone (BW1) and at superior border of mandibular canal (BW2). The height was be calculated by measuring the vertical distance between BW1 and BW2. Data was tabulated and statistically analyzed using unpaired t-test. RESULTS: The results of our study indicates that dimensions of buccal and lingual bone walls of all teeth at MP1 and MP2 in PM1, PM2 and M1 were statistically significant. Also only the 1st premolar (PM1) showed statistical significance with regard to dimensions at BW1 and BW2. CONCLUSION: The present study highlights the need for further studies with larger samples which can impact the immediate implant success rates in mandibular posterior teeth.
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Soman, cristalle. "CBCT ANALYSIS OF ALVEOLAR BONE DIMENSIONS IN MANDIBULAR POSTERIOR TEETH: A PRELIMINARY STUDY." INDIAN JOURNAL OF APPLIED RESEARCH, October 1, 2019, 1–3. http://dx.doi.org/10.36106/ijar/0600491.
Full textAbstract:
OBJECTIVES: Extraction of mandibular posterior teeth followed by immediate implant placement is considered as an optimal technique of immediate prosthetic rehabilitation. The analysis of alveolar bone dimensions with Cone Beam Computerized Tomography prior to implant placement is a prime determinant in treatment planning. Hence this preliminary study was conducted to analyze the alveolar bone dimensions in dentate mandibular posterior teeth to evaluate the available bone which can be utilized for immediate implant placements. MATERIALS AND METHODS: Retrospective data of 200 cases of full volume CBCT was procured from Riyadh Elm University (REU) database and reviewed for eligibility. Atotal of 10 cases were included in the study. Scans were assessed for thickness of buccal and lingual walls at 4mm below the CEJ (MP1) and at midroot level (MP2). Alveolar width was assessed at most coronal point on alveolar bone (BW1) and at superior border of mandibular canal (BW2). The height was be calculated by measuring the vertical distance between BW1 and BW2. Data was tabulated and statistically analyzed using unpaired t-test. RESULTS: The results of our study indicates that dimensions of buccal and lingual bone walls of all teeth at MP1 and MP2 in PM1, PM2 and M1 were statistically significant. Also only the 1st premolar (PM1) showed statistical significance with regard to dimensions at BW1 and BW2. CONCLUSION: The present study highlights the need for further studies with larger samples which can impact the immediate implant success rates in mandibular posterior teeth
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Soman, Cristalle. "CBCT ANALYSIS OF ALVEOLAR BONE DIMENSIONS IN MANDIBULAR POSTERIOR TEETH: A PRELIMINARY STUDY." INDIAN JOURNAL OF APPLIED RESEARCH, October 1, 2019, 1–3. http://dx.doi.org/10.36106/ijar/5300436.
Full textAbstract:
OBJECTIVES: Extraction of mandibular posterior teeth followed by immediate implant placement is considered as an optimal technique of immediate prosthetic rehabilitation. The analysis of alveolar bone dimensions with Cone Beam Computerized Tomography prior to implant placement is a prime determinant in treatment planning. Hence this preliminary study was conducted to analyze the alveolar bone dimensions in dentate mandibular posterior teeth to evaluate the available bone which can be utilized for immediate implant placements. MATERIALS AND METHODS: Retrospective data of 200 cases of full volume CBCT was procured from Riyadh Elm University (REU) database and reviewed for eligibility. Atotal of 10 cases were included in the study. Scans were assessed for thickness of buccal and lingual walls at 4mm below the CEJ (MP1) and at midroot level (MP2). Alveolar width was assessed at most coronal point on alveolar bone (BW1) and at superior border of mandibular canal (BW2). The height was be calculated by measuring the vertical distance between BW1 and BW2. Data was tabulated and statistically analyzed using unpaired t-test. RESULTS: The results of our study indicates that dimensions of buccal and lingual bone walls of all teeth at MP1 and MP2 in PM1, PM2 and M1 were statistically significant. Also only the 1st premolar (PM1) showed statistical significance with regard to dimensions at BW1 and BW2. CONCLUSION: The present study highlights the need for further studies with larger samples which can impact the immediate implant success rates in mandibular posterior teeth
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Fernandes, Atson Carlos de Souza, Giovanni Iran Barreto Nascimento Júnior, Fernanda de Souza Pereira, Khadry A. Galil, Illa Oliveira Bitencourt Farias, Iêda M. Crusoé R. Rebello, and Maurício Andrade Barreto. "GINGIVAL BIOTYPE AND ITS RELATIONSHIP TO THE MAXILLARY MEMBRANE AND LATERAL WALL THICKNESS." Journal of Oral Implantology, August 31, 2020. http://dx.doi.org/10.1563/aaid-joi-d-19-00247.
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The purpose of this study was to analye the risk of the maxillary sinus lift technique, and the correlation between the thickness of the gingiva, maxillary sinus membrane and the maxillary sinus lateral wall. Cone-Beam Computer Tomograhy (CBCT) records of 32 adult dentate patients (10 ♂ / 22♀) were analyzed. The gingival thickness records of the dental units were compared to the thickness measurements of the membrane and lateral wall of the maxillary sinus. The gingival biotypes varied between 1.1mm (thin) and 1.6mm (thick) presenting a small association to sexes. The thickness of the sinus membrane presented small association between sexes (0.2mm♀ / 0.3mm♂) and gingival biotypes (Cohen’s D 0.52). The lateral wall presented a weak association between the biotypes (1.3mm-thin / 1.1mm - thick). There was also no correlation between the membrane and lateral wall (r = -0.22). The volume dimension related to the graft area of the sinus was 4mm³♂ and 5mm³♀. There was a weak correlation of gingival thickness compared to membrane thickness and lateral wall of the sinus (r = 0.304 / r = -0.31). Gingival thickness does not appear to be a reliable thickness predictor of the membrane or lateral wall of the maxillary sinus. The analysis of maxillary sinus anatomical structures through CBCT is the most reliable technique to identify the thickness of the membrane and lateral wall of the maxillary sinus before surgery. We believe that new studies are necessary to confirm our findings.
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Zhu, Dongwang, Qiman Zhou, and Feng Qiao. "The Radiological Evaluation of the Anatomy of the Alveolar Antral Artery and the Lateral Wall Thickness Using Cone-Beam Computed Tomography: A Retrospective Study." Current Medical Imaging Formerly Current Medical Imaging Reviews 19 (March 6, 2023). http://dx.doi.org/10.2174/1573405619666230306093633.
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The objectives: The objectives study aims to assess the position and route of the alveolar antral artery and the lateral wall thickness of the maxillary sinus using cone-beam computed tomography (CBCT), reducing the risk of complications and improving the success rate of surgery. background: Maxillary sinus floor elevation has been widely used to gain adequate bony tissue for implant placement in the maxillary posterior area, but the intraoperative complications have also been reported. Materials and Methods: This study included CBCT scans from 238 patients. The detection diameter of AAA and distance of the lower border of AAA to the maxillary sinus floor at the first premolar, second premolar, first molar, and second molar locations were evaluated. The route of AAA was observed with novel classification. Furthermore, the distance from the maxillary sinus floor to the alveolar crest at four posterior tooth locations was measured respectively. Moreover, the lateral wall thickness at four locations was assessed. Data were subjected to statistical analysis. Results: AAA was observed in 62.18% of all sinuses. The mean diameter was 0.99±0.21 mm, with significant differences within gender. Half of the route of AAA was intrasinus intraosseous type. The mean distance between the maxillary sinus floor and AAA was 8.00±2.68 mm, with a significant difference between dentate and edentulous status at the first molar location. Distance from the sinus floor to the alveolar ridge crest in edentulous status negatively correlated with the distance from the sinus floor to AAA at the first molar location. The mean thickness of the lateral wall was 2.03±0.91 mm, and the difference in thickness between males and females at the four locations was statistically significant. Conclusion: intrasinus-intraosseous type, is the most common route. Special care should be taken at the first molar location during a lateral window sinus floor elevation. CBCT is highly recommended to before lateral wall maxillary sinus floor elevation. other: Not applicable
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Salinas-Goodier, Carmen, Rosa Rojo, Jorge Murillo-González, and Juan Carlos Prados-Frutos. "Three-dimensional descriptive study of the pterygomaxillary region related to pterygoid implants: A retrospective study." Scientific Reports 9, no. 1 (November 7, 2019). http://dx.doi.org/10.1038/s41598-019-52672-x.
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Abstract The objective of this study was to analyze three-dimensionally the morphological characteristics of the pterygomaxillary region related to pterygoid implants. Volume, height, width and bone density were studied in relation to age, sex and dental status. This retrospective observational study analyzed the CBCT of 52 hemi-maxillas three-dimensionally (females n = 28, males n = 24; dentate = 31, edentulous = 21). Patients were exposed between September 2009 and October 2014, and data collection was performed between November 2015 and May 2016. Bone density, volume, height and width were analyzed in various locations of the maxilla and pterygoid process, and the variables age, gender and dental status patients were compared. The results show that the mean width of the pterygomaxillary joint was 7.5 mm (SD 1.00 mm), mean height was 12.51 mm (SD 1,82 mm) and mean volume was 321.7 mm3 (SD 142.02 mm3). Statistically significant differences between dentate and edentulous patients were found, showing a higher osseous density in dentate patients in the pterygoid process (758.2, SD 106.8, 95% CI 729.2 to 787.3 GSD - Gray Scale Density - compared to 689.9, SD 107.3, 95% CI 660.8 to 719.1 GSD; P = 0.022). In the maxilla, density was statistically significant lower in female subjects (571.0, SD 74.1, 95% CI 594.9 to 645.4 GSD) than in male subjects (620.2, SD 93.8, 95% CI 594.4 to 645.4 GSD, P = 0.047). In conclusion, due to the significant variation in the morphological characteristics of the pterygomaxillary region among subjects, personalized pre-surgical radiological assessment should always be performed. Gender, age and dental status are critical factors as they significantly affect bone density in this region.
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G, Berchialla, Portigliatti R, Gartner S, Mugnolo C, Vacaflor A, Uribe Echevarría L, Mangeuad A, and Martin M. "Estudio de la sección transversal de premolares inferiores con tomografía computada de haz cónico." Methodo Investigación Aplicada a las Ciencias Biológicas 7, no. 2 (April 13, 2022). http://dx.doi.org/10.22529/me.2022.7(2)07.
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INTRODUCCIÓN: Los premolares inferiores son conocidos por la naturaleza compleja de la configuraciónde sus conductos. Generalmente cuando presentan uno solo es estrecho y acintado. En la actualidadcontamos con herramientas de diagnóstico más precisas como las Tomografías Computadas de Haz Cónicopara evaluar la morfología de los conductos en los tres planos del espacio.OBJETIVO: Es estudiar la sección transversal de los conductos de premolares inferiores humanos, con unsolo conducto radicular.MATERIAL Y MÉTODO: Fueron estudiados 120 premolares inferiores humanos extraídos. Losespecímenes fueron estudiados por medio de CBCT, con un tomógrafo Carestream 8200. Del total de lamuestra, se seleccionaron a través de las CBCT, sólo los premolares con un conducto. Los mismos fueronanalizados en cortes perpendiculares al eje largo del diente (axiales) En cada pieza dentaria se midió eldiámetro en sentido bucolingual y mesiodistal del conducto (expresado en milímetros) en los tres tercios:cervical, medio y apical. Posteriormente, se analizó la morfología del conducto en los cortes axiales, en lostres tercios antes mencionados, clasificándolos en: circulares, ovales, ovalesalargados y acintados. Lasvariables cuantitativas fueron representadas en tablas mediante promedio y desvío, mientras que lascualitativas con frecuencias y porcentajes. Se realizaron pruebas de Friedman y prueba de uniformidad chicuadrado. Se utilizaron los soft RMedic e Infostat. En todos los casos el nivel de significación fue del 5%.RESULTADOS: El 1,22% de los casos presentaron un conducto circular y 4,88 % ovalado en todo surecorrido. El 93,9% de la muestra presentó diferentes morfologías en los 3 tercios del conducto: LCC en21.95%, seguida por ACC con un 20.73% y OCC con un 10,98%. Se observó un predominio de conductoscirculares en el 84% en el tercio apical y 56% en el medio; ovalados en tercio medio en un 31,71% yaplanados en el tercio cervical en un 37.8%. El diámetro promedio del conducto circular a 3 mm del ápicefue de 0,55 mm2. En cervical el promedio de diámetro mayor fue de 2.58 mm en BL y 0.83 mm en MD yen tercio medio 1,29 mm en BL y 0.82 mm en MD.CONCLUSIONES: Los premolares inferiores con un solo conducto presentaron diferentes morfologías enlos tres tercios del conducto. El predominio de la anatomía fue Alargada o Aplanada en el tercio Cervical(37.80%) y predominio de Circulares en Medio (56.10%) y Apical (84.15%). Este tipo de conductos, quevarían su morfología longitudinalmente, pueden ser un verdadero desafío para su instrumentación,irrigación y obturación.
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CHANDRANKANAVEETTIL, AISWARYA, ABHINETHRA MARIYAPPASHANTHA, DEEPAK TIMMASANDRAASHWATHAPPA, UPASANA LINGAIAH, and AMIRNENI SAILAJACHOUDARY. "Assessment of Thickness of Roof of the Glenoid Fossa in Dentate, Edentulous, and Partially Edentulous Subjects using Cone Beam Computed Tomography (CBCT) - A Retrospective Study." Journal of Stomatology, Oral and Maxillofacial Surgery, May 2022. http://dx.doi.org/10.1016/j.jormas.2022.05.009.
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Bilginaylar, Kani, Hasan Mete Inancli, and Meliz Kneebone. "Endoscopic and Intraoral Approach for Removal of an Ectopic Third Molar associated with a Dentigerous Cyst in the Maxillary Sinus: A Case Report." JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH, 2023. http://dx.doi.org/10.7860/jcdr/2023/62276.18007.
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Dental ectopia is the presence of deciduous, permanent, or supernumerary teeth in non dentate areas. It is very rare, especially in the maxillary sinus. Treatment is surgical removal because left untreated, there is a tendency to form a cyst, tumour, or lesion that can cause the perforation of the orbital floor and the obstruction of the nasal cavity. Although, panoramic radiography is the common form of radiological examination for this type of eruption, Cone Beam Computed Tomography (CBCT) is the gold standard for pinpointing the exact location of the ectopic tooth and evaluating the characteristics of any associated lesion prior to a surgical procedure. A 17-year-old woman was referred with swelling, asymmetry, and local pain in her right maxillary region. On radiological examination, an ectopic third molar surrounded by a dentigerous cyst obstructing both the right maxillary and ethmoid sinuses was observed. The tooth was attached to the zygomatic bone, right under the orbital floor. Ectopic maxillary third molars are extracted mainly by the Caldwell-Luc technique but also by nasal endoscopy. The treatment of this eruption and its management is heterogeneous and multidisciplinary. In the present case, under general anaesthesia, the ectopic tooth and all cystic tissue occupying the entire right maxillary and ethmoid sinuses were successfully enucleated with an intranasal endoscopic approach by an otolaryngologist and with lateral sinus antrostomy, utilising a standard Caldwell-Luc approach, by an oral and maxillofacial surgeon. After the 6th and 12th months, the patient had no signs of sinus infection and had an uneventful recovery
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Alcaraz, S., G. Martin, G. Arce Brizon, S. Arguelles, and C. Solla. "Mínimo espesor dentinario de conductos de premolares preparados para postes de fibra." Methodo. Investigación Aplicada a las Ciencias Biológicas, December 1, 2019. http://dx.doi.org/10.22529/me.2019.4(4)03.
Full textAbstract:
INTRODUCCIÓN: Los elementos tratados endodónticamente pierden estructura dentinaria, como resultado de caries, preparación de acceso endodóntico y ensanchamiento para pernos. La preparación del espacio para poste consiste en conformar el conducto radicular, que posee formas irregulares y variables, generando un espacio de formas regulares que se correspondan con las del poste. El espacio para el poste no debe exceder un tercio del diámetro de la raíz y el espesor de dentina remanente no debe ser menor de 1 mm. OBJETIVO GENERAL: Evaluar in vitro el espesor de dentina residual en premolares con un solo conducto luego de la instrumentación endodóntica y posterior preparación para poste de fibra de vidrio. OBJETIVOS ESPECÍFICOS: 1) Medir el espesor dentinario desde la superficie del conducto hasta la superficie externa de la raíz. 2) Reconocer la zona de mínimo espesor de dentina en el espacio del conducto preparado para poste, entre la obturación de gutapercha y el hombro tallado en el elemento dentario. 3) Comparar la ubicación de la zona de mínimo espesor entre los elementos dentarios. 4) Determinar en qué cara del elemento dentario, libre o proximal, se observa el mínimo espesor dentinario. MATERIALES Y MÉTODOS: Se seleccionaron 20 premolares extraídos con un solo conducto radicular. Se tomaron radiografías de frente y perfil, y posteriormente se talló la cavidad de acceso coronario. Se realizó un pre-tallado coronario y se instrumentaron los conductos con el Sistema Reciproc Blue (VDW). Se procedió a la obturación con cono de gutapercha y cemento Ad-Seal (META) mediante la técnica de compactación lateral. Se realizó la preparación para poste de fibra de vidrio con fresa Gates Glidden n°2, fresa Peeso n°1, seguida de la n°2 y se finalizó con el ensanchador para postes RTD N°2; dejando 5 mm de obturación con gutapercha a nivel apical. Se tomó una tomografía computada de haz cónico (CBCT) sobre la cual se realizaron las mediciones de los espesores de dentina, desde la superficie del conducto radicular hasta la superficie externa de la raíz, en las caras libres y proximales del elemento dentario. Se registraron las mediciones a la altura del hombro de tallado coronario, a la altura del conducto donde comienza la obturación con gutapercha y en un punto equidistante entre el hombro y la gutapercha. Los datos obtenidos fueron registrados en una hoja de captura de datos y analizados estadísticamente mediante el test Student Newman Keuls. RESULTADOS: En 5 piezas dentarias el espesor residual de dentina fue menor a 1 mm. El promedio de mesial y distal fue significativamente menor que las caras libres. Los mínimos espesores dentinarios se presentaron en mesial y distal del nivel apical, seguido por mesial de la zona media. CONCLUSIÓN: La preparación del conducto para la colocación de postes de fibra en premolares implica remoción de dentina y el mínimo espesor remanente fue observado en las caras mesial y distal de la raíz