Journal articles on the topic 'Dental arch; Occlusion (Dentistry)'
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Jorge, Paula Karine, Níkolas Val Chagas, Eloá Cristina Passucci Ambrosio, Cleide Felício Carvalho Carrara, Fabrício Pinelli Valarelli, Maria Aparecida Andrade Moreira Machado, and Thais Marchini Oliveira. "Surgical effects of rehabilitation protocols on dental arch occlusion of children with cleft lip and palate." Brazilian Journal of Oral Sciences 21 (August 23, 2022): e226343. http://dx.doi.org/10.20396/bjos.v21i00.8666343.
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Aim: to evaluate the surgical effects of two rehabilitation protocols on dental arch occlusion of 5-year-old children with or without cleft lip and palate. Methods: this is a retrospective longitudinal study the sample comprised 45 digitized dental casts divided into followed groups: Group 1 (G1) – children who underwent to cheiloplasty (Millard technique) at 3 months and to one-stage palatoplasty (von Langenbeck technique) at 12 months; Group 2 (G2) – children who underwent to cheiloplasty (Millard technique) and two-stage palatoplasty (Hans Pichler technique for hard palate closure) at 3 months and at 12 months to soft palate closure (Sommerlad technique); and Group 3 (G3) – children without craniofacial anomalies. Linear measurements, area, and occlusion were evaluated by stereophotogrammetry software. Shapiro-Wilk test was used to verify normality. ANOVA followed by posthoc Tukey test and Kruskal-Wallis followed by posthoc Dunn tests were used to compared groups. Results: For the measures intercanine distance (C-C’), anterior length of dental arch (I-CC’), and total length of the dental arch (I–MM’), there were statistical differences between G1x G3 and G2xG3, the mean was smaller for G1 and G2. No statistically significant differences occurred in the intermolar distance and in the dental arch area among groups. The occlusion analysis revealed significant difference in the comparison of the three groups (p=0.0004). Conclusion: The surgical effects of two rehabilitation protocols affected the occlusion and the development of the anterior region of the maxilla of children with oral clefts when compared to children without oral clefts.
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Pacek, Elżbieta, and Michael H. Walter. "Anterior occlusion in shortened dental arches." Clinical Oral Investigations 26, no. 4 (December 10, 2021): 3487–92. http://dx.doi.org/10.1007/s00784-021-04317-5.
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Abstract Objectives The aim of this study was to examine the occlusion of anterior teeth in individuals with shortened dental arch (SDA). Material and methods In a case–control clinical study, 41 individuals with SDA and 41 individuals with complete dental arch (CDA) participated. The CDA control group was matched for age and gender. Testing for occlusal contacts of anterior maxillary teeth was conducted by biting on foil strips (8 µm) with subjectively normal bite force (NBF) and maximal bite force (MBF). The data was analyzed on individual and tooth levels. Results The median rates of anterior maxillary teeth with occlusal contacts were 0.67 (NBF) and 0.83 (MBF) in the SDA group and 0.50 (NBF) and 0.83 (MBF) in the CDA group. Within both groups, the contact rates were significantly higher in MBF. The group difference with NBF was significant. A generalized linear model showed that the odds of an anterior maxillary tooth to have an occlusal contact were greater in the SDA both for NBF with an odds ratio (OR) 2.277 and MBF with an OR 1.691. Conclusions The findings suggest effective compensatory mechanisms relative to the occlusal function in individuals with SDA. Clinical relevance The study delivers further evidence regarding the SDA concept as a viable option in the management of posterior tooth loss.
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Fischev, Sergey, Marina Puzdyryova, Sergey Dmitrienko, Dmitry Domenyuk, and Andrey Kondratyuk. "MORPHOLOGICAL FEATURES OF DENTOFACIAL AREA IN PEOPLE WITH DENTAL ARCH ISSUES COMBINED WITH OCCLUSION ANOMALIES." Archiv Euromedica 9, no. 1 (April 30, 2019): 162–63. http://dx.doi.org/10.35630/2199-885x/2019/9/1/162.
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The level of development of each era determines the specifics of recognizing diseases and teaching about them. Nowadays, there is an increased interest taken by patients in their own appearance as well as in the structural features of the facial part of their heads. Another issue currently faced by the dentistry is the growing prevalence of dentofacial anomalies and deformities among various population groups. The etiological factors behind anomalies and deformities include dental system congenital and acquired pathologies, and especially dental arch defects . The effect of the dental arches pathology on the craniofacial status has been proven in numerous works written by clinical experts [8, 9]. It has been noted that the timely treatment and preventive measures offered to patients with dental arches defects through different age periods, has a beneficial effect on the growth, development and condition not only of the masticatory system, yet also on the adjacent organs and body systems . Given the above, studying maxillofacial morphology in people with dental arch defects will remain an urgent issue for dentistry
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Girish Babu, KL, Geeta Maruti Doddamani, and Gururaj Hebbar Kavyashree. "Dental arch characteristics among South Indian twins." Brazilian Journal of Oral Sciences 21 (March 9, 2022): e225388. http://dx.doi.org/10.20396/bjos.v21i00.8665388.
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Genetic and environmental factors are essential in occlusal variations and malocclusion and have been of considerable interest to orthodontists. Studies on twin pairs are one of the most effective methods for investigating genetically determined occlusal variables. Many studies have focused on distances between first molars or between canines but malocclusions can also occur in other regions of the dental arch. Aim: To evaluate the characteristics of the dental arch between pairs of Monozygotic (MZ) and Dizygotic (DZ) twins from Southern India. Methods: A random sample of 51 twin pairs (12–18years old) participated in this study. The zygosity of twin pairs was recorded by facial appearance. The occlusion of the first permanent molars was recorded according to Angle’s classification. Study models were prepared to assess dental arch characteristics (i.e., arch form, arch perimeter, arch length; intercanine, intermolar width, and teeth size discrepancy). The obtained data was statistically analyzed using SPSS software 19.0. The student’s t-test (two-tailed, independent) and Chi-square test was used to determine the significance of studied parameters. Results: Angle’s Class I molar relation was more commonly observed followed by the Class II molar relationship among twins. The measured dental arch dimensions did not show a statistically significant difference among twin pairs. The ovoid arch form was commonly observed among Monozygotic and Dizygotic Twins. There was a similarity among MZ and DZ twins in the anterior and overall Bolton’s ratio. Conclusion: There were similar occurrences of measured parameters among twins, which showed genetic predominance in the expression of measured dental arch traits.
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Azeem, Muhammad, Arfan ul Haq, Javed Iqbal, Asif Iqbal, and Waheed ul Hamid. "Maxillary Intermolar Width Of Pakistanis With Untreated Normal Occlusion." Journal of Bahria University Medical and Dental College 08, no. 03 (June 4, 2018): 139–41. http://dx.doi.org/10.51985/jbumdc2018028.
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Objective: Intermolar width is a key measurement which assists in treatment planning of orthodontic patients requiring expansion as an alternate to premolar extraction. The present research was aimed at determining the mean value of intermolar arch width (IMW) of untreated normal arch Pakistani patients visiting tertiary care dental hospital Material & Methods: This cross sectional study was carried out using IMW measurements on plaster model of 120 untreated normal occlusion patients, at Department of Orthodontics, Faisalabad Medical University and de’Montmorency College of dentistry, from 15-12-2016 to 15-10-2017. The non probability consecutive sampling technique was used in this study. Data analysis was done using SPSS software 21.0.0. Results: The mean age of the subjects was 18.23±3.75 years. The mean value of IMW in selected subjects was 45.33±3.42 mm. Conclusion: Study results concluded that in Pakistanis, ideally align maxillary arch and occlusion can be achieved with upper intermolar distances of 45.33±3.42 mm
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Ramos, Adilson Luiz, Ossam Abu El Haje, Daniela Daufenback Pompeo, Gisela Crippa Furtado, and Luciana Monti Lima Rivera. "Is It Possible to use Cross-sectional and Vertical Facial Measurements to establish the Shape of the Mandibular Arch?" Journal of Contemporary Dental Practice 15, no. 6 (2014): 735–39. http://dx.doi.org/10.5005/jp-journals-10024-1608.
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ABSTRACT Background Given the benefits of radiographic cephalometric studies in determining patterns of dental-skeletal-facial normality in orthodontics, the aim of this study was to investigate the association between mandibular dental arch shape and cross-sectional and vertical facial measurements. Materials and methods It was analyzed plaster casts and teleradiographs in frontal and lateral norm belonging to 50 individuals, aged between 15 and 19 years, with no previous history of orthodontic treatment and falling into four of the six Andrews's occlusion keys. The plaster models were scanned (3D) and the images of the dental arches were classified subjectively as oval, triangular and quadrangular by three calibrated examiners, with moderate inter-examiner agreement (Kappa = 0.50). After evaluation of the method error by paired t test (p > 0.05), it was carried out the analysis of cross-sectional and vertical facial measurements to be compared to the shape of the dental arch. Data were subjected to one-way analysis of variance with a significance level of 5%. Results When the VERT index was compared with the three arch shapes, no measurement showed statistically significant differences (p > 0.05): triangular (0.54); oval (0.43); and quadrangular (0.73); as well as there were no differences (p > 0.05) in the widths of the face (141.20; 141.26; 143.27); maxilla (77.27; 77.57; 78.59) and mandible (105.13; 103.96; 104.28). Conclusion It can be concluded that there was no correlation between different shapes of the mandibular dental arch and the cross-sectional and vertical facial measurements investigated. How to cite this article El Haje OA, Pompeo DD, Furtado GC, Rivera LML, Paranhos LR. Is It Possible to use Cross-sectional and Vertical Facial Measurements to establish the Shape of the Mandibular Arch? J Contemp Dent Pract 2014;15(6):735-739.
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Kafle, Dashrath, Vasant Devagiri, Prabhat Kumar Chaudhari, and Ranjeev Kumar Mishra. "Analysis of Lingual Arch Form in Dental Students of Nepal with Normal Occlusion." Clinical, Cosmetic and Investigational Dentistry Volume 12 (November 2020): 477–83. http://dx.doi.org/10.2147/ccide.s268139.
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Kochkonyan, Taisiya, Ghamdan Al-Harazi, Dmitry Domenyuk, Sergey Dmitrienko, and Stanislav Domenyuk. "MORPHOMETRIC PATTERNS OF MAXILLAR Y APICAL BASE VARIABILITY IN PEOPLE WITH VARIOUS DENTAL ARCHES AT PHYSIOLOGICAL OCCLUSION." Archiv Euromedica 11, no. 4 (September 30, 2021): 123–29. http://dx.doi.org/10.35630/2199-885x/2021/11/4.29.
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Morphometric data on the structure of the craniofacial complex are reliable and diagnostically significant values that are of applied nature in terms of practical dentistry. Within this study, analysis of conebeam computed tomograms, biometric indicators of plaster models obtained from the jaws of 83 people (aged 21–35) with physiological occlusion and various types of dental, gnathic dental arches, the degree of proportion between the maxillary apical base and the inter-canine distance were identified. Depending on the dental arch type, the patients were divided into three groups. The morphometric study in the CBCT frontal plane was the distance between the canines tearing tubercles and the inter-canine distance in the apical area. The study outcomes revealed discrepancies between the calculated and actual indicators of the apical base width for all types of dental arches in people with physiological occlusion. In case of mesotrusive dental arches (incisional angle — 127–143°), the width of the apical base corresponded to the width of the dental arches between the canines, while the differences in indicators were not statistically significant. In people with retrusive dental arches (incisional angle exceeding 144°), the width of the dental arch was found to be significantly above the width of the apical bases. As far as protrusive dental arches are concerned (incisional angle below 126°), these patients featured predominance of the apical bases width over the inter-canine distance. The obtained data add to that already available in research literature regarding the relationships and dimensional features pertaining to the craniofacial complex structures, as well as have applied value in orthodontic clinical practice
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Chałas, Renata, Marta Jurczykowska, Rafał Marczyński, and Elżbieta Pels. "Composite Inlays as A Modern Way of Posterior Restorations in the Dental Arch." Polish Journal of Public Health 124, no. 2 (August 8, 2014): 99–102. http://dx.doi.org/10.2478/pjph-2014-0023.
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Abstract Modern restorative dentistry offers many methods of restoring qualitative cavities within the clinical crowns. Due to the concept of maintaining continuity of the dental arch and maintaining the correct plane of occlusion, for reconstruction of posterior teeth, there are especially recommended indirect restorations, which are made in the dental laboratory, i.e. crown inlays. The aim of the study was based on the literature to describe indications, classifications and advantages of indirect composite inlays. Additionally, factors affecting the durability of indirect composite inlays and the influence on stomatognathic system were noted. Authors concluded that composite inlays can be recommended restoration method, not only in situations of loss of clinical crown tissue, but also in situations where it is necessary as structural reinforcement, e.g., in the case of Cracked Tooth Syndrome or Molar Incisor Hypomineralization.
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Davydov, B. N., S. V. Dmitrienko, D. A. Domenyuk, and E. N. Ivancheva. "Methodological approaches in diagnostics of anomalies of form and dimensions of dental arc taking into account individual morphological features." Medical alphabet, no. 3 (June 12, 2020): 12–18. http://dx.doi.org/10.33667/2078-5631-2020-3-12-18.
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The results of a biometric study of gypsum models of 174 people of the first period of adulthood with physiological occlusion of permanent teeth made it possible to calculate the boundaries of variability under normodontism, macrodontism, and microdontism for upper and lower dental arches. The length of the upper dental arch during normodontism with an interval of ‘three sigma’ varied from 109 to 117 mm, and the length of the lower dental arch was 101 to 114 mm. A decrease in biometric values by odontometric indicator beyond the limits of sigmal deviations for normodont indicators made it possible to distinguish a micro-type of dental arches, and an increase in biometric values – macro-standard. The calculated data on the relative morphometric values of the dental arches, the index of the ratio of the length of the dental arch to the transversal sizes (normodontism: upper jaw at 1.85 ± 0.20 cu, lower jaw at 1.94 ± 0.20 cu; macrodontism: upper jaw at 1.86 ± 0.03 cu; lower jaw at 1.88 ± 0.02 cu; microdontism: upper jaw at 1.82 ± 0.01 cu, the lower jaw at 1.83 ± 0.02 cu), as well as the index of the ratio of the length of the dental arch to the sum of the diagonal dimensions of both sides (normodontism: upper jaw at 1.05 ± 0.02 cu, lower jaw at 1.10 ± 0.02 cu; macrodontism: upper jaw at 1.07 ± 0.01 cu, lower jaw at 1.08 ± 0.02 cu; microdontism: upper jaw at 1.06 ± 0.02 cu, lower jaw at 1.09 ± 0.02 cu), it is advisable to use for the diagnosis of anomalies in the shape and size of the dental arches in clinical orthodontics and orthopedic dentistry.
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Nyakale, Mandla Dominic. "Orthodontic Treatment of Bilateral Transposition of Maxillary Canines and Lateral Incisors." Case Reports in Dentistry 2022 (January 4, 2022): 1–9. http://dx.doi.org/10.1155/2022/8094008.
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Dental transposition is a severe disturbance of tooth position and its eruptive sequence. It may affect any tooth, and it may occur at any location within the dental arch, although some teeth may be more frequently affected than others. There are several types of dental transposition, and their classification depends on the type of teeth involved. The aetiology of transposition is not very clear and has always been the subject of controversies, and it is still not completely understood. The prevalence of dental transposition and the factors related to this dental anomaly have been well documented in the literature. When treating dental transposition, many factors which may affect the treatment results must be considered, such as aesthetics, occlusion, treatment duration, patient comfort, patient cooperation, and periodontal support. Various treatment options are currently available for the treatment of dental transposition. Successful treatment outcomes depend on the patient’s age, concern about facial and dental aesthetics, motivation of the patient, functional requirements, type of malocclusion, and the position of the root apices. The present case report is aimed at outlining the orthodontic treatment of a young adult patient diagnosed with bilateral maxillary canine-lateral incisor transposition.
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Suleman, Ghazala, Saurabh Chaturvedi, Rania A. Shareef, Asim Elsir Elmahdi, and Mohamed Fadul A. Elagib. "An Assessment of Dentist’s Attitudes to the Shortened Dental Arch Concept." Open Access Macedonian Journal of Medical Sciences 8, no. D (March 5, 2020): 14–22. http://dx.doi.org/10.3889/oamjms.2020.3748.
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AIM: The rehabilitation of a complete dental arch is a traditional concept to maintain proper functional occlusion, but it is neither compulsory nor always attainable in many patients. Nevertheless, it is always important to provide a minimum number of teeth for efficient function. This study aimed to assess the dentist’s attitude to a shortened dental arch (SDA) concept and to assess their perception and application of it in their clinical practice in the Aseer region, Saudi Arabia.
DESIGN OF STUDY: A questionnaire with 17 questions was used to reveal the views of 204 dentists from the area of study about SDA. The questionnaire set basically consists of two parts. The first part included the dentists’ demographic data, and the second one consisted of the questions regarding the SDA concept.
STATISTICAL ANALYSIS: Descriptive analysis and associations with the factors were tested for significance using Chi-square tests, and p < 0.05 was considered statistically significant.
RESULTS: Among the respondents, 43.7% were aware of the SDA concept. Thus, the expected awareness about the SDA concept among the dentists was in the range of 36.31–51.05 with 95% confidence. A highly significant difference in awareness of SDA was observed between graduates and postgraduates. Among the respondents having more than 10 years of experience, the awareness level of SDA was 66.0%.
CONCLUSIONS: The majority of participants alleged that the SDA concept is useful in clinical practice and is a useful treatment modality for older adults with limitations preventing complex restorative care. However, the application of the SDA varied significantly among dentists.
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Seligman, D. A., A. G. Pullinger, and W. K. Solberg. "The Prevalence of Dental Attrition and its Association with Factors of Age, Gender, Occlusion, and TMJ Symptomatology." Journal of Dental Research 67, no. 10 (October 1988): 1323–33. http://dx.doi.org/10.1177/00220345880670101601.
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Dental attrition severity in 222 young adults was assessed from dental casts as the sum of the most severe facet in each arch segment. The attrition scores were compared by age, gender, bruxism awareness, prior bite adjustment, orthodontic class, maxillomandibular relationship, and temporomandibular dysfunction symptoms. Awareness of bruxism was not associated with the wear scores and should not be used to define bruxist groups. Attrition scores did not differ significantly between age groups, indicating that notable attrition, when present, often occurs early. Men had higher attrition scores than women (p<0.01), despite fewer signs and symptoms. Dental attrition was not associated with the presence or absence of TMJ clicking, TMJ tenderness, or masticatory muscle tenderness. Class II division 2 males had laterotrusive attrition scores lower than those of Class III (p<0.05). Class III females had lower incisor attrition scores than did other Angle Classes (p<0.05). Discernible dental attrition in a non-patient population was not associated with signs and symptoms of temporomandibular disorders, nor with the occlusal factors studied. These results are compatible with the findings in other studies that point to bruxism as a centrally induced phenomenon common to all people and unrelated to local factors.
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KFL, Elias, Denis Clay Lopes Dos Santos, Daniel Negrete, and Everton Flaiban. "Curve of spee: a literature review." Revista de Odontologia da Universidade Cidade de São Paulo 28, no. 2 (May 1, 2016): 110. http://dx.doi.org/10.26843/ro_unicid.v28i2.220.
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The curve of Spee (COS) is an important characteristic of the dental arch that was described as an occlusal curvature seen in the sagittal plane. This natural phenomenon has clinical importance in orthodontics and restorative dentistry. This study aim to gather the current knowledge of COS in order to become a guide for a construction of an optimal occlusion. The methodology utilized was a review and compilation of the most pertinent literature articles. The following were deliberated in this review: development, measurement, evolutive similarities, gender, side, properties, the purpose of levelling, the sorts of levelling and the long-term stability of the COS. In conclusion, although a large amount of research on COS already exists, there is no standard methodology to define an ideal model of treatment and/or prevention. Nevertheless, its results give dentists a complete overview to establish their approach towards a successful long-term stability treatment.
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Grochala, Dominik, Anna Paleczek, Justyna Lemejda, Marcin Kajor, and Marek Iwaniec. "Evaluation of Geometric Occlusal Conditions Based on the Image Analysis of Dental Plaster Models." MATEC Web of Conferences 357 (2022): 05006. http://dx.doi.org/10.1051/matecconf/202235705006.
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It has been proved that dimensions of the dental arch may change as a result of growth or orthodontic treatment. The most intense transformations can be observed at young age during an occurrence of a mixed dentition period. Based on diagnostic models in a form of plaster casts there is a possibility to measure following features: overbite, overjet, the curve of Spee, arch depth, arch width and Bolton’s ratios. Nowadays computer-aided tools can provide valuable information for dentists or orthodontists and simplify analysis, diagnosis and preparation of a treatment plan. Correct organization of the dental arch in the horizontal plane can be modelled as a parabola for a mandible and as a section of the ellipse for a jaw. A developed system based on the Python programming language provides automated analysis of plaster model images. Proposed methodology includes preprocessing of provided casts’ pictures and segmentation of dental arch using methods such as image morphological operations, edge detection and active contour algorithm. In this research there were also calculated semi-ellipse and parabola fitting functions of dental arches and measured the root mean squared error relative to the original curves. Preliminary results showed 1.29 mm RMSE level for correct occlusion and 2.39 mm in case of malocclusion. Proposed methods can be used for simplifying the analysis of dental arches’ shape and monitoring of changes during orthodontic treatment.
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Radeke, Johanna, Annike B. Vogel, Falko Schmidt, Fatih Kilic, Stefan Repky, Jan Beyersmann, and Bernd G. Lapatki. "Trueness of full-arch IO scans estimated based on 3D translational and rotational deviations of single teeth—an in vitro study." Clinical Oral Investigations 26, no. 3 (November 27, 2021): 3273–86. http://dx.doi.org/10.1007/s00784-021-04309-5.
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Abstract Objectives To three-dimensionally evaluate deviations of full-arch intraoral (IO) scans from reference desktop scans in terms of translations and rotations of individual teeth and different types of (mal)occlusion. Materials and methods Three resin model pairs reflecting different tooth (mal)positions were mounted in the phantom head of a dental simulation unit and scanned by three dentists and three non-graduate investigators using a confocal laser IO scanner (Trios 3®). The tooth-crown surfaces of the IO scans and reference scans were superimposed by means of best-fit alignment. A novel method comprising the measurement of individual tooth positions was used to determine the deviations of each tooth in the six degrees of freedom, i.e., in terms of 3D translation and rotation. Deviations between IO and reference scans, among tooth-(mal)position models, and between dentists and non-graduate investigators were analyzed using linear mixed-effects models. Results The overall translational deviations of individual teeth on the IO scans were 76, 32, and 58 µm in the lingual, mesial, and intrusive directions, respectively, resulting in a total displacement of 114 µm. Corresponding rotational deviations were 0.58° buccal tipping, 0.04° mesial tipping, and 0.14° distorotation leading to a combined rotation of 0.78°. These deviations were the smallest for the dental arches with anterior crowding, followed by those with spacing and those with good alignment (p < 0.05). Results were independent of the operator’s level of education. Conclusions Compared to reference desktop scans, individual teeth on full-arch IO scans showed high trueness with total translational and rotational deviations < 115 µm and < 0.80°, respectively. Clinical relevance Available confocal laser IO scanners appear sufficiently accurate for diagnostic and therapeutic orthodontic applications. Results indicate that full-arch IO scanning can be delegated to non-graduate dental staff members.
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Coto, Neide Pena, Reinaldo Brito e. Dias, Ricardo Aurélio Costa, Tatiana Fioresi Antoniazzi, and Eduardo Pena Coto de Carvalho. "[NO TITLE AVAILABLE]." Brazilian Dental Journal 18, no. 4 (2007): 324–28. http://dx.doi.org/10.1590/s0103-64402007000400010.
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In the present investigation, an experimental dental arch model fabricated in epoxy was assayed in Kratos universal testing machine to study the mechanical behavior of ethylene and vinyl acetate copolymer (EVA) in the form of mouthguard for sports and flat plate. The following variables were considered: thickness (3 and 4-mm plates), temperature (room and mouth temperature) and presence/absence of artificial saliva. Mechanical properties of EVA were tested under compressive strength: apparent absorbed energy (J.mm-1), maximum tension (N.mm-1), maximum dislocation (mm) and maximum strength (N). Data were recorded and modeled mathematically. Regarding the absorbed energy, maximum tension and maximum force, it was verified that the higher the thickness of the mouthguards, the better the results of force dissipation and redirection to the system and to several regions of the dental arch. In the presence of saliva and close to mouth temperature, the material responded positively to these alterations, resenting increased ductibility as well as improved mechanical responses. Regarding maximum dislocation, it was observed a better accommodation of the occlusion under conditions that simulate those observed in the oral environment. In conclusion, EVA proved to be an adequate material for fabrication of mouthguards and interocclusal splints. In addition, EVA showed good results in force dissipation and demonstrated a shock-absorbing capacity and a great protection potential.
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Alnaqbi, I. A., and A. O. Mageet. "Guiding Maxillary Left Central Incisor to Occlusion and Late Formation of a Supernumerary Tooth in the Upper Left Premolar Region." Case Reports in Dentistry 2021 (January 30, 2021): 1–7. http://dx.doi.org/10.1155/2021/6622641.
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Hyperdontia or supernumerary teeth are the erupted or impacted teeth, which develop in addition to the regular dental series and might cause many occlusal problems. This article sheds light on a case of impacted maxillary left central incisor (21) due to a mesiodens supernumerary tooth and a late development of another supernumerary tooth in the upper left premolar area at the end of orthodontic treatment. O.A. is an 11-year, eight-month-old male, African patient presented to the orthodontic clinic with a chief complaint “My upper front tooth did not erupt although the dentist attached a wire to pull it with the help of a neighbouring tooth.” Clinically, he is medically fit and healthy, presented with class II division I malocclusion on skeletal II base; mild space discrepancy in the upper and lower dental arches; impacted 21; increased overjet; reduced overbite; localized bilateral posterior crossbite in relation to tooth number 16, 15, 25, and 26; and lower centreline shift to the left. Radiographically, lateral cephalometric radiograph confirms the skeletal relationship, whereas dental panoramic tomography (DPT) shows impacted 21 and the presence of all permanent teeth. The treatment plan consists of comprehensive orthodontic treatment using preadjusted edgewise metallic bracket, Roth prescription 0.022 ″ × 0.028 ″ slot and an active transpalatal arch (TPA) with palatal arms. Retention regimen comprises of upper and lower bonded retainers from canine to canine and vacuum-formed retainers (VFRs) for both dental arches.
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Alogaibi, Yahya A., Ahmad A. Al-Fraidi, Manar K. Alhajrasi, and Ali A. Hassan. "Correction of a Class III Malocclusion with a Functional Shift and Severe Crowding." Case Reports in Dentistry 2020 (November 24, 2020): 1–9. http://dx.doi.org/10.1155/2020/8867130.
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A forward functional shift of the mandible is a significant problem that can cause both functional and aesthetic complications for many patients. This shift usually occurs in growing patients, and it is unusual to see in adult patients. This case report shows an adult patient with a forwarding functional shift that caused both anterior and posterior crossbites with a pseudo class III dental and skeletal relationship. The patient also showed severe upper arch crowding with blocked-out canines and mild crowding in the lower arch. The treatment of this patient involved extraction of the upper right and left first premolars and the lower right first premolar, followed by opening of the bite to relieve the neuromuscular reflex of the forward protrusion of the mandible during centric occlusion and to correct both the anterior and posterior crossbites. Extraction spaces were closed using class III elastics and elastomeric chains. At the end of the treatment, good functional and aesthetic results were obtained after the elimination of the forward functional shift.
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Nagaveni, Nayaka Basavanthappa, Kagathur Veerbadrappa Umashankara, Sreedevi, Bokka Praveen Reddy, Nayaka Basavanthappa Radhika, and Tirumala Suryaprakash Satisha. "Multi-lobed mesiodens with a palatal talon cusp: a rare case report." Brazilian Dental Journal 21, no. 4 (2010): 375–78. http://dx.doi.org/10.1590/s0103-64402010000400016.
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Mesiodens is a midline supernumerary tooth commonly seen in the maxillary arch and the talon cusp is a rare dental developmental anomaly seen on the lingual surface of anterior teeth. This paper presents a rare clinical case of development of talon cusp in a mesiodens with multiple lobes, which interfered with both occlusion and appearance of an 11-year-old patient. During clinical interview, the patient reported difficulty on mastication. Clinical and radiographic examination revealed that a supernumerary tooth with completely formed root was causing an occlusal interference. The supernumerary tooth was diagnosed as multi-lobed mesiodens associated with a palatal talon cusp. The treatment plan consisted in the extraction of the supernumerary tooth followed by orthodontic treatment for diastema closure and tooth alignment.
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Bongaarts, Catharina A. M., Anne M. Kuijpers-Jagtman, Martin A. van't Hof, and Birte Prahl-Andersen. "The Effect of Infant Orthopedics on the Occlusion of the Deciduous Dentition in Children with Complete Unilateral Cleft Lip and Palate (Dutchcleft)." Cleft Palate-Craniofacial Journal 41, no. 6 (November 2004): 633–41. http://dx.doi.org/10.1597/03-051.1.
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Objective Evaluation of the effect of infant orthopedics (IO) on the occlusion of the deciduous dentition in patients with unilateral cleft lip and palate (UCLP). Design Prospective, two-arm, randomized, controlled clinical trial with three participating cleft palate centers (Dutchcleft). Setting Cleft Palate Centers of the University Medical Center Nijmegen, Academic Center of Dentistry Amsterdam, and Dijkzigt University Hospital Rotterdam, The Netherlands. Patients Children with complete UCLP (n = 54) were included. Interventions In a concealed allocation procedure, half of the patients was randomized to wear a plate till surgical closure of the soft palate (IO+), and the other half (IO−) did not have a plate. Mean Outcome Measures Dental arch relationships were assessed at 4 and 6 years of age with the 5-year-old index; the Huddart-score; and measurements of overjet, overbite, and sagittal occlusion. Results There were no significant differences found between the IO+ and IO− groups for the 5-year-old index; the Huddart-score; and overjet, overbite, and sagittal occlusion. Conclusions IO had no observable effect on the occlusion in the deciduous dentition at 4 and 6 years of age. Considering the occlusion only, there is no need to perform IO in children with UCLP.
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Xue, Dai Juan and Feng. "Combined Orthodontic-surgical Treatment for Skeletal Class III Malocclusion with Multiple Impacted Permanent and Supernumerary Teeth: Case Report." Open Dentistry Journal 8, no. 1 (May 16, 2014): 43–48. http://dx.doi.org/10.2174/1874210601408010043.
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In this report we describe a combined orthodontic and surgical treatment for a 14-year-old boy with severe skeletal class III deformity and dental problem. His upper posterior primary teeth in the left side were over-retained and 6 maxillary teeth (bilateral central incisors and canines, left first and second premolars) were impacted, together with 5 supernumerary teeth in both arches. The treatment protocol involved extraction of all the supernumerary and deciduous teeth, surgical exposure and orthodontic traction of the impacted teeth, a bimaxillary orthognathic approach including Lefort I osteotomy. Bilateral sagittal split ramus osteotomy (BSSRO) and genioplasty was performed to correct skeletal problem. After treatment, all of the impacted teeth were brought to proper alignment in the maxillary arch. A satisfied profile and good posterior occlusion was achieved. Treatment mechanics and consideration during different stages are discussed.
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Davydov, B. N., T. S. Kochkonyan, D. A. Domenyuk, and S. V. Dmitrienko. "Regularities of individual-typological variability of the dental arches and jaws at high palatic ventilation in patients with physiological occlusion." Medical alphabet 1, no. 12 (June 28, 2021): 21–29. http://dx.doi.org/10.33667/2078-5631-2021-12-21-29.
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One of the fundamental problems of morphology, which has applied significance, is a comprehensive study of variants of individual-typological variability of the structures of the facial and cerebral parts of the skull, as well as the regularities of the interrelationships of individual components in the cranial system as a whole. An in-depth characteristic of the individual characteristics of the structures of the craniofacial complex makes it possible to improve the methods of diagnosis and treatment of dentoalveolar pathology. The article discusses the morphometric features of the dentition in people with a high type of palatine arch of the dolichopalatinal type, as well as their relationship with the shape of the dental arches and the size of the inter-incisal angle in physiological occlusion of permanent teeth. As a result of the study, the following pattern was determined: the transverse dimensions of the palatine fornix of the dolichopalatinal type have a stable relationship with the transverse dimensions of the dolichognathic dental arches and the value of the inter-incisal angle. The data obtained can be used in the clinic of orthodontics, orthopedic dentistry, and maxillofacial surgery to assess the parameters of the hard palate, diagnose pathological forms of the palatine fornix and determine the effectiveness of the treatment.
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Paranhos, Luiz R., Gladistone C. Meros, Aline Shoji, Selly Suzuki, Rodrigo Manfroi, Jonathas Claus, and Aguinaldo Garcez. "An Alternative Approach for Space Opening in a Bilateral Maxillary Lateral Incisor Agenesis Patient using Miniplates." Journal of Contemporary Dental Practice 18, no. 12 (2017): 1198–205. http://dx.doi.org/10.5005/jp-journals-10024-2200.
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ABSTRACT Aim This case report aimed to present an orthodontic mechanic alternative for space opening in a patient missing maxillary lateral incisors, using miniplates as anchorage, associated with self-ligating brackets. Background Dental agenesis affects the population causing esthetic and functional damages. The prevalence of missing maxillary lateral incisors should be considered for its significant rate and negative impact on smile esthetics. Case report This treatment was chosen based on the presence of balanced facial pattern, large canine anatomy, the need to improve dental occlusion to prevent further wear, and patient's esthetic complaint. To obtain the results, upper third molars were extracted, and two miniplates were installed to distalize the upper arch with no need for patient compliance or auxiliary devices. Self-ligating brackets were used to reduce friction on posterior teeth, thus facilitating movement with light force application. At the end of 19 months, the patient presented with class I good overbite and overjet, and adequate space for implant and prosthetics; also, good facial esthetic was maintained. Conclusion When indicated, space opening may provide excellent esthetics and functional results, and even more predictable results when skeletal anchorage miniplates are used to distalize all posterior teeth. Clinical significance Considering the high level of esthetic and functional compromise caused by dental agenesis, the technique hereby described represents a viable mechanic alternative within orthodontic possibilities. How to cite this article Meros GC, Shoji A, Suzuki S, Paranhos LR, Manfroi R, Claus J, Garcez A. An Alternative Approach for Space Opening in a Bilateral Maxillary Lateral Incisor Agenesis Patient using Miniplates. J Contemp Dent Pract 2017;18(12):1198-1205.
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Mason, Robert. "A retrospective and prospective view of orofacial myology." International Journal of Orofacial Myology 31, no. 1 (November 1, 2005): 5–14. http://dx.doi.org/10.52010/ijom.2005.31.1.1.
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Orofacial myofunctional disorders include specific conditions or behaviors that can have a negative impact on oral postures and functions. Historically, interest has focused on behaviors in the horizontal plane, highlighted by tongue thrusting. Currently, the scope of practice also includes tongue forward posturing, lip incompetence, open mouth rest posture, thumb and finger sucking, bruxism, and biting habits involving lips, fingers, tongue and cheeks. The common denominator for myofunctional conditions is a change in the inter-dental arch vertical rest posture dimension, the dental freeway space. The purposes of myofunctional therapy include normalizing the freeway space dimension by eliminating noxious habits or postures related to freeway space change. Improving cosmesis with a lips-together rest posture is also an important treatment goal. The clinical significance of the freeway space is explained in terms of the dental consequences of differential eruption patterns that can develop from postural modification of the freeway space. When the freeway space is opened for extended periods beyond the normal range, the tongue can act as a functional appliance and contribute to the development of anterior open bite or a Class II malocclusion. A clinical procedure is proposed for evaluating the freeway space dimension and incorporating the information into treatment planning and evaluation of treatment success. While dentistry/orthodontics has a primary focus on dental occlusion, or teeth-together relationships, orofacial myologists focus on teeth-apart behaviors and postures that can lead to, or have already resulted in malocclusion.
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Masna, Z. "GENDER FEATURES OF THE ALVEOLAR PROCESS OF THE UPPER JAW." Clinical anatomy and operative surgery 19, no. 4 (November 26, 2020): 10–14. http://dx.doi.org/10.24061/1727-0847.19.4.2020.44.
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The individual face shape, the ratio of its proportions, the articulation capabilities of each person to a significant extent depend on the characteristics of occlusion and occlusion, in turn, are determined by the size, shape and ratio of dental, alveolar and basal arches. Two of them - alveolar and basal - pass at the corresponding levels of the alveolar areas of the jaws, which means that it is almost impossible to correct them, therefore they play the role of landmarks for setting the dental arch during dental prosthetics. A full-fledged aesthetic and functional restoration of the maxillofacial region after prosthetics largely depends on the dentist taking into account the individual morphological characteristics of the jaws, their cellular areas and specifically the morphometric parameters of the collar and basal arches. In order to determine the possible variants of the shape of the alveolar and basal arches of the upper jaw and the patterns of their ratio during the routine dental examination, 55 people (27 men and 28 women) aged 21-60 years with preserved maxillary dentition were examined. It has been established that the alveolar and basal arches of the upper jaw can have the shape of five geometric shapes: an oval, a semicircle, an ellipse, a trapezoid or a square. In this case, the shape of the collar and basal arches can coincide or be combined in various combinations. The analysis of the obtained results showed that in men the alveolar arch most often had the shape of an oval (70%), in women - an oval or semicircle (43%, respectively). With the aim of possible variants of the alveolar and basal arches form determination and peculiarities of their correlation 55 individuals (27 men and 28 women) in age of 21-60 years with the preserved teeth row were examined during planned dental examination. All examined were patients of the “Dental clinic of dr. Dakhno” (Kyiv). Computer tomographic investigation was made to these patients according to medical indications, scanning was made parallely to the occlusal plane. Image reconstruction was conducted with the use of highly dimentional bone algorithm. Alveolar and basal arch form of the upper jaw were determined on the images. It was established that alveolar and basal arches of the upper jaw can have a form of five geometrical figures: oval, semicircle, ellipse, trapeze or square. Form of the alveolar and basal arches can match or can combine in different combinations. Received results analysis testified that alveolar arch has a form of the oval in men and oval or semicircle – in women. Basal arch in men also most frequently has a form of oval, less often – semicircle, square and trapeze. In women basal arch more often has a form of trapeze or semicircle, less often – oval or square. In men alveolar and basal arches form matched in 41% of cases, in women – only in 31% of cases among total amount of all examined individuals. Most often alveolar and basal arches matched in the form of oval and semicircle, only in one case arches of the trapeze form matched in man, in woman – square form. Maxillary alveolar and basal arches form variants analysis let to determine areas, where distance between alveolar crests was maximal. Most variable this index was in individuals with the oval form of the alveolar arch on the level of 16-26, 17-27 or 18-28 teeth. Peculiarities of the alveolar and basal arches form of the alveolar process of the upper jaw in male and female individuals are characterized with expressed individual variability. These peculiarities consideration during dental prosthesis let avoid series of complications connected with the pressure redistribution on the osseous tissue of the jaws during articulation.
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Barodiya, Animesh, Rishi Thukral, SM Agrawal, Anil S. Chouhan, Sidharth Singh, and Yogesh Loksh. "Self-tapping Intermaxillary Fixation Screw: An Alternative to Arch Bar." Journal of Contemporary Dental Practice 18, no. 2 (2017): 147–51. http://dx.doi.org/10.5005/jp-journals-10024-2006.
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ABSTRACT Introduction The use of intermaxillary fixation (IMF) in the treatment of faciomaxillary fractures is the key factor for reduction and immobilization. Various techniques of IMF have been described in the past and recently IMF screws have been introduced. This technique has various advantages, including ease of use, less time consumption, less trauma to the surrounding soft tissues, and relatively reduced risk of needle stick injury. This study evaluates the efficacy of IMF screws over arch bar IMF before definitive fixation of facial fractures. Materials and methods This study is a randomized clinical study. Study population consists of 20 patients with mandibular fractures requiring IMF with open reduction and reported to Department of Oral Surgery, Modern Dental College and Research Centre, Indore, Madhya Pradesh, India between September 2012 and April 2015. Two groups were formed with 10 patients in each group. In the first group, IMF was achieved using the Erich's arch bar and wires. In the second group, IMF was achieved using self-tapping IMF screw. The patients were assessed for various parameters, such as the time required in minutes for the IMF stability of fixation, postoperative occlusion, postoperative pain, periodontal health, oral hygiene, and incidence of needle stick injury. Results All the cases had stable IMF in both groups. At the end of 14th day, overall oral hygiene was poor in group I and good in group II, significant statistically (p = 0.031). Iatrogenic injury to tooth was absent in group I and present in 1 case in group II, not significant statistically (p = 0.305). Average time taken for the IMF in group I was 74.9 minutes, with the range of 58 to 88 minutes, and in group II was 16.1 minutes, with the range of 11 to 22 minutes, which is highly significant statistically (p = 0.001). Needle stick injuries were taken as positive if glove perforation was present and these were reported in four cases in group I, whereas in group II, no case had incidence of needle stick injuries, which shows significant statistically (p = 0.025). Conclusion After this study, we can conclude that IMF selftapping screw is a proven useful technique of IMF. Intermaxillary fixation is a safe and less time-consuming method but with various shortcomings and complications, which the surgeon must be aware of while providing treatment. Clinical significance: How to cite this article Barodiya A, Thukral R, Agrawal SM, Chouhan AS, Singh S, Loksh Y. Self-tapping Intermaxillary Fixation Screw: An Alternative to Arch Bar. J Contemp Dent Pract 2017;18(2):147-151.
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Smahlyuk, L. V., N. V. Kulish, and O. M. Nesterenko. "INTERDISCIPLINARY APPROACH IN TREATMENT OF PATIENTS WITH DENTAL ANOMALIES." Ukrainian Dental Almanac, no. 2 (June 27, 2022): 28–33. http://dx.doi.org/10.31718/2409-0255.2.2022.05.
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The article presents data on the treatment of patients with TMJ and concomitant deformities. The most important connection between the dental system and the musculoskeletal system is the temporomandibular joint, which in the presence of dental anomalies and in the period of temporary occlusion undergoes increased loads, which leads to its dysfunction. The concept of the interaction of posture and occlusion was first put forward in the early 20th century, which noted that children with glossoptosis have X-shaped legs, crooked posture and typical signs of distal occlusion. It has been theorized that occlusal disorders can alter posture in the frontal and sagittal planes and ultimately alter body weight distribution. Postural curvature causes a violation of the position of the head of the temporomandibular joint, which in turn leads to pain and joint dysfunction. Any postural disorders lead to compensatory changes throughout the body, not excluding the maxillofacial area. This is especially true for the formation of mesial occlusion (III class according to Angle). Mesial occlusion in the structure of dental anomalies is determined in 12% of cases, but the severity of the anomaly and aesthetic disorders that occur often force orthodontists to use a combination.
Therefore, further improvement of methods of diagnosis and treatment of occlusions of occlusion of the third class according to Angle will allow most patients to get a positive treatment result and the opportunity to adapt in society. An example of coordination of specialists in the planning and implementation of treatment is the clinical case of patient K. 16 years old, who went to the clinic where on the basis of examination and special research methods diagnosed: Angle class III (skeletal form) true progeny, macroglossia. Also at inspection of a posture sharp curvature of a backbone, with signs of scoliosis is defined. From the back there is a clear asymmetry of the shoulders within 4 centimeters. Asymmetrical location of the shoulder blade and even significant hypertrophy of the right shoulder blade (in this direction the patient is determined by the displacement of the mandible).
Asymmetry was noted in the general study of the face. Displacement of the chin to the right was noted. The asymmetry of facial structures begins with the upper third. Asymmetry of superciliary arches, orbits, wings of the nose, nostrils, and corners of the mouth was also observed. Deepened nasolabial folds were noted. The lower lip overlaps the upper one. But the profile of the face remains almost straight. Based on the data obtained, the patient was offered the following treatment plan: consultation with an orthopedist traumatologist about scoliosis, consultation with a dentist surgeon about skeletal surgery, consultation with a speech therapist. Orthodontic treatment is concerned with a brace system. The patient’s brace system was fixed on the upper jaw (“straight arch” technique was used). 38 and 48 teeth were removed. Bilateral planar osteotomy of the mandible and resection of the tip of the tongue were performed. The lower jaw brace system was fixed using oblique intermaxillary traction, which the patient used for 6 months. A course of therapy with a speech therapist was conducted to restore speech function. The total duration of the active treatment period contained 4 years. After creating the maximum occlusal contact, the patient regained chewing function. Thus, the treatment of mesial occlusion and its prognosis largely depends on etiological factors and the possibility of their elimination, as well as the severity of morphological and functional disorders, the difficulty of eliminating them during permanent occlusion. Therefore, the sacred rule of medicine "better to prevent than to cure" in relation to skeletal forms of mesial occlusion is the most relevant.
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Mendonça, Marcos Rogério de, Mayra Fernanda Ferreira, Priscila Maria Marchesini, Tamires Passadori Martins, Alberto Carlos Botazzo Delbem, and Osmar Aparecido Cuoghi. "Anterior crossbite treatment in the transitional period of mixed dentition: a case report." Research, Society and Development 10, no. 13 (October 10, 2021): e186101321234. http://dx.doi.org/10.33448/rsd-v10i13.21234.
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Anterior crossbite refers to the abnormal vestibulolingual relationship in the sagittal dimension between one or more anterior superior and inferior anterior teeth. It can be classified as dental, functional or skeletal. Each has its own diagnostic criteria and specific treatment, and it is up to the dentist to know how to distinguish between these different natures of malocclusion. In this sense, the aim of this study is to show a case report about an ACM. Patient HCA, female, 7 years old, attending the Preventive Orthodontics Clinic of the Faculty of Dentistry of Araçatuba - UNESP, having as main complaint “untidy front tooth”. The patient has no history of systemic diseases or medication use. The patient was in the first transitional period of mixed dentition with her right maxillary central incisor in crossbite relationship with its antagonists mandibular central incisor. On both sides, the patient had the first permanent molars in Class I relationship, the deciduous second molars with mesial step and the deciduous canines in a Class I. Initially, an acrylic appliance with an expander was installed. Due to lack of cooperation, the treatment plan was changed and the patient received a fixed appliance with a 2x2 configuration, with brackets on maxillary central incisors and edgewise tubes on maxillary deciduous molars. In the lower arch, a bite lift was performed on the occlusal surface of mandibular deciduous molars to unblock the occlusion and facilitate the movement of right maxillary central incisor. The total treatment time was 60 days.
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Van Outshoorn, Nic Van Reede, Charles Bradfield, and Leanne Sykes. "Criteria that must be considered in order to optimise the success of computer aided designed and computer aided manufactured (CAD/CAM) restorations." South African Dental Journal 77, no. 04 (June 22, 2022): 222–29. http://dx.doi.org/10.17159/2519-0105/2022/v77no4a5.
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Several factors influence the success or failure of ceramic dental restorations, and need to be considered and understood prior to embarking on these restorations. It is incumbent on the clinician to have an in-depth knowledge on the science of ceramic materials, current bonding agents and techniques, understanding and working proficiency of computer aided design and computer aided manufacture (CAD/CAM) computer hardware and software, an appreciation of oral biology, the role of occlusion and occlusal schemes, as well as recognition and management of patients with parafunctional habits. This paper will cover the principles of cavity preparation and tooth preparation designs, maintenance and / or achievement of inter-arch stability, preservation of marginal integrity, provision of occlusal stability, and digital impression techniques required to optimise accuracy. Provision of a chairside manufactured CAD/CAM dental restoration requires dentists to perform both the clinical and the laboratory aspects of the procedure. The responsibility for the quality of the final restoration thus rests in their hands alone and it is their duty to ensure they are adequately trained and skilled in all aspects
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Skaf, Zouhair, and Fidèle Nabbout. "Class II Correction with Microimplant Supported Molar Distalization: A Report of Two Cases." Case Reports in Dentistry 2022 (July 11, 2022): 1–11. http://dx.doi.org/10.1155/2022/2679318.
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Introduction. Orthodontic treatment of class II malocclusion with conventional treatment modalities can be challenging for the clinician. The use of microimplants to obtain absolute anchorage has become very popular in recent years especially in noncompliant patients. Microimplants are convenient, save time, and produce good treatment results with no need for patient cooperation. A special approach for class II correction with microimplant supported molar distalization has been developed by the authors and is illustrated through two clinical cases. Description. For each clinical case, 0.022” preadjusted brackets were bonded on both arches except on the maxillary first and second premolars with bands on the first and second molars. After leveling and alignment, a 0.017 ” × 0.025 ” stainless steel wire was fitted on the upper arch, and two microimplants were placed bilaterally between the maxillary second premolar and the first molar. Open coil springs were inserted in the upper archwire on both sides and compressed via a steel ligature on sliding hooks to the microimplants pushing distally simultaneously the first and second maxillary molars. En-masse retraction of the maxillary anterior teeth was then carried out on a 0.019 ” × 0.025 ” stainless steel closing loop archwire while the posterior segment was anchored to the microimplant with a steel ligature to the first premolar. Results. Class I canine and molar relationship were achieved, and an ideal occlusion was established. Both ANB and FMA angles decreased by 1° due to the counterclockwise rotation effect of the maxillomandibular complex. Skeletal and dental results remained stable three years later. Conclusion. Maxillary molar distalization using coils and buccal microimplants can be regarded as an effective technique in a relatively short time and might be considered a breakthrough in the treatment of class II malocclusions. Microimplants enable the clinician to perform a nonextraction treatment in noncompliant patients who would alternatively be treated only with extractions.
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Serri, Marco, Andrea Papa, and Marcello Melis. "Digital bite registration of habitual occlusion with specific skeletal intraoral scan bodies for the fabrication of a fixed full-arch prosthesis on immediate loading dental implants with full digital workflow. Two case reports." Journal of Dentistry 121 (June 2022): 103995. http://dx.doi.org/10.1016/j.jdent.2022.103995.
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Regalla, Ravindra Reddy, Vummidisetti V. Subbarao, V. Santi, and G. Anita. "Interarch Tooth Size Relationship of Indian Population: Does Bolton's Analysis Apply?" Journal of Contemporary Dental Practice 15, no. 1 (2014): 103–7. http://dx.doi.org/10.5005/jp-journals-10024-1496.
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ABSTRACT Background Orthodontists have several methods to detect inter arch-tooth size discrepancies in patients presenting for orthodontic treatment. Many methods such as Pont's analysis, Nance and Carey's analysis, Peck and Peck ratio, Bolton's analysis are commonly used methods. A thorough search of literature reveals a paucity of reliable data on the mesiodistal dimensions of the crowns of the permanent dentition of Indian population. Without information about the size of individual tooth and groups of teeth for Indian population, it is difficult for the clinician to make an adequate diagnosis and treatment plan and to carry out a plan of therapy. Aim To determine the size of individual permanent tooth and the sex differences, with tooth size ratios according to Bolton's formula and to evaluate the reliability of Bolton's norms (Anterior/Posterior) in Indian population. Materials and methods One hundred and twenty cases in which an excellent occlusion was naturally existent with the mean age of 22 years (18-27 years) were selected in the study. The casts were prepared after taking alginate impression of maxillary and mandibular arches and pouring them immediately with dental stone. A sliding Digital Vernier calliper used to measure the teeth. The ratios of the mean of mesiodistal dimensions of types of teeth were computed. Results The mean overall ratio for the Indian population is found to be 92.11 with a standard deviation of 2.12. The values ranged from 86.50-97.13 and the median is 92.16. The mean anterior ratio for the Indian population is found to be 78.14 with a standard deviation of 2.59. Conclusion Bolton's original data does not represent Indian population. In our study Greater size variability was found in maxillary teeth as compared with mandibular teeth except mandibular first molar. Our study indicated that populationspecific standards are necessary for clinical assessments. Significant differences were shown for the overall ratio and anterior ratio for both sexes as compared to Bolton's ratio. How to cite this article Subbarao VV, Regalla RR, Santi V, Anita G, Kattimani VS. Interarch Tooth Size Relationship of Indian Populations: Does Bolton's Analysis Apply? J Contemp Dent Pract 2014;15(1):103-107.
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Segarra, M. S., Y. Shimada, A. Sadr, Y. Sumi, and J. Tagami. "Three-Dimensional Analysis of Enamel Crack Behavior Using Optical Coherence Tomography." Journal of Dental Research 96, no. 3 (November 25, 2016): 308–14. http://dx.doi.org/10.1177/0022034516680156.
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The aim of this study was to nondestructively analyze enamel crack behavior on different areas of teeth using 3D swept source-optical coherence tomography (SS-OCT). Ten freshly extracted human teeth of each type on each arch ( n = 80 teeth) were inspected for enamel crack patterns on functional, contact and nonfunctional, or noncontact areas using 3D SS-OCT. The predominant crack pattern for each location on each specimen was noted and analyzed. The OCT observations were validated by direct observations of sectioned specimens under confocal laser scanning microscopy (CLSM). Cracks appeared as bright lines with SS-OCT, with 3 crack patterns identified: Type I – superficial horizontal cracks; Type II – vertically (occluso-gingival) oriented cracks; and Type III – hybrid or complicated cracks, a combination of a Type I and Type III cracks, which may or may not be confluent with each other. Type II cracks were predominant on noncontacting surfaces of incisors and canines and nonfunctional cusps of posterior teeth. Type I and III cracks were predominant on the contacting surfaces of incisors, cusps of canines, and functional cusps of posterior teeth. Cracks originating from the dental-enamel junction and enamel tufts, crack deflections, and the initiation of new cracks within the enamel (internal cracks) were observed as bright areas. CLSM observations corroborated the SS-OCT findings. We found that crack pattern, tooth type, and the location of the crack on the tooth exhibited a strong correlation. We show that the use of 3D SS-OCT permits for the nondestructive 3D imaging and analysis of enamel crack behavior in whole human teeth in vitro. 3D SS-OCT possesses potential for use in clinical studies for the analysis of enamel crack behavior.
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Rusli, Victoria, and Miesje Karmiati Purwanegara. "Koreksi multiple diastema dan gigitan silang posterior unilateral pada kasus maloklusi kelas III<p></p>Correction of multiple diastema and unilateral posterior crossbite in class III malocclusion<p>." Jurnal Kedokteran Gigi Universitas Padjadjaran 33, no. 3 (March 29, 2022): 87. http://dx.doi.org/10.24198/jkg.v33i3.33473.
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ABSTRAKPendahuluan: Gigitan silang posterior didefinisikan sebagai relasi abnormal antara gigi molar dan/atau premolar rahang atas dan bawah dalam arah bukal-lingual pada oklusi sentrik. Diastema atau celah antar gigi merupakan kondisi yang umum ditemui dan menjadi salah satu masalah estetis dan maloklusi. Tujuan penulisan laporan kasus ini adalah menjelaskan perawatan ortodontik kasus maloklusi kelas III dengan multiple diastema dan gigitan silang unilateral. Laporan kasus: Pasien laki laki 25 tahun datang ke Klinik Spesialis Ortodontik Rumah Sakit Gigi dan Mulut Fakultas Kedokteran Gigi Universitas Indonesia dengan keluhan gigi depan berjarak. Pasien mendapat diagnosa maloklusi skeletal kelas III dengan multiple diastema pada gigi anterior rahang atas dan gigitan silang posterior unilateral. Kasus ini dikoreksi dengan ortodontik cekat tanpa pencabutan menggunakan braket preskripsi MBT slot 0,022. Perawatan secara garis besar meliputi pengaturan ruangan serta penggunaan criss-cross elastic di akhir perawatan untuk perbaikan gigitan silang unilateral. Perawatan ortodontik diselesaikan dalam waktu 18 bulan. Simpulan: Perawatan ortodontik cekat pada kasus maloklusi kelas III dengan ekspansi lengkung rahang disertai penggunaan criss- cross elastic yang teratur dapat mengoreksi gigitan silang. Recontouring gigi anterior rahang atas paska pengaturan ruang pada kasus multiple diastema juga memberikan tampilan senyum pasien yang lebih estetis.Kata kunci: multiple diastema; gigitan silang posterior; maloklusi kelas III ABSTRACTIntroduction: Posterior crossbite is an abnormal relationship between the maxillary and mandibular molars and premolars in the buccal-lingual direction in centric occlusion. Diastema or gap between teeth is a common condition and is one of the aesthetic problems and malocclusion. This case report aims to describe the orthodontic treatment of a class III malocclusion case with multiple diastema and unilateral crossbite. Case report: A 25-year-old male patient came to the Orthodontic Specialist Clinic of the Dental Hospital of the Faculty of Dentistry of the University of Indonesia with complaints of distant front teeth. The patient was diagnosed with skeletal class III malocclusion with multiple diastema of anterior maxillary teeth and unilateral posterior crossbite. This case was corrected with fixed orthodontics without extraction using a 0.022 slot MBT prescription bracket. Treatment generally includes room management and a criss-cross elastic at the end of the treatment to repair unilateral crossbites. The orthodontic treatment was completed within 18 months. Conclusion: Fixed orthodontic treatment in cases of class III malocclusion with the expansion of the jaw arch with regular use of criss-cross elastic can correct the crossbite. Recontouring of anterior maxillary teeth after spatial adjustment in cases of multiple diastema also gives the patient a more aesthetic smile.Keywords: multiple diastema; posterior crossbite; class III malocclusion
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Suryajaya, William, and Haru Setyo Anggani. "Perawatan ortodonti kamuflase pada maloklusi kelas III skeletal dengan gigitan terbuka anteriorOrthodontic camouflage of skeletal class III malocclusion with an anterior open-bite." Jurnal Kedokteran Gigi Universitas Padjadjaran 32, no. 3 (February 28, 2021): 120. http://dx.doi.org/10.24198/jkg.v32i3.30666.
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Pendahuluan: Perawatan ortodonti kamuflase adalah perawatan untuk menyamarkan diskrepansi skeletal dengan mengubah posisi dan angulasi gigi-gigi pada lengkung rahang. Perawatan tersebut merupakan perawatan yang dapat dipilih selain bedah ortognatik bagi kasus maloklusi skeletal kelas III pada pasien dewasa. Maloklusi skeletal kelas III sering pula disertai dengan keadaan lain seperti gigitan terbuka anterior yang menambah kompleksitas modalitas perawatan. Tujuan laporan kasus ini untuk menjelaskan pilihan modalitas perawatan pasien maloklusi skeletal kelas III secara kamuflase ortodonti. Laporan kasus: Pasien wanita usia 19 tahun 2 bulan datang ke klinik Ortodonti RSGM FKG UI dengan keluhan gigi atas depan tidak teratur dan gigi depan atas dan bawah tidak bertemu. Diagnosis menunjukkan pola skeletal kelas III dengan posisi maksila dan mandibula terhadap basis cranii retrognati (SNA 73°, SNB 74°, ANB -1°) disertai dengan crowding sedang dan gigitan terbuka anterior. Tipe wajah pasien dolikofasial, simetris dan seimbang. Profil jaringan lunak dan skeletal cekung. Kasus ini dirawat dengan pendekatan ortodonti kamuflase tanpa pencabutan menggunakan piranti cekat standar Edgewise untuk mengoreksi crowding pada lengkung gigi atas dan bawah serta gigitan terbuka pada regio anterior. Perawatan ortodonti selesai dalam waktu 13 bulan dan crowding pada lengkung gigi atas dan bawah serta gigitan terbuka pada regio anterior telah terkoreksi. Simpulan: Perawatan ortodonti kamuflase pada maloklusi kelas III skeletal dengan gigitan terbuka anterior ringan merupakan pilihan perawatan yang cukup baik karena dapat mengoreksi maloklusi dengan kompensasi dentoalveolar sehingga diperoleh oklusi yang baik dan stabil. Hasil perawatan menunjukan hasil yang cukup baik dan dapat diterima oleh pasien.Kata kunci: Maloklusi skeletal kelas III, crowding, open-bite anterior, standar edgewise, ortodonti kamuflase. ABSTRACTIntroduction: Orthodontic camouflage is a treatment to disguise skeletal discrepancies by changing the teeth position and angulation in the jaw arch. This treatment is an option other than orthognathic surgery for skeletal class III malocclusion in adult patients. Skeletal class III malocclusion is often accompanied by other conditions such as an anterior open-bite which adds the complexity of the treatment modality. This case report was aimed to describe the choice of treatment modality for skeletal class III malocclusion patients by orthodontic camouflage. Case report: A female patient aged 19 years and two months came to the Orthodontic Clinics at the Faculty of Dentistry of University of Indonesia Dental Hospital (RSGM FKG UI) with complaints of irregular maxillary anterior teeth, and the maxillary and mandibular anterior teeth did not overlap. The diagnosis showed a skeletal class III pattern with the maxillary and mandibular position against the retrognathic cranii base (SNA 73°, SNB 74°, ANB -1°) accompanied by moderate crowding and anterior open-bite. The patient’s face type is dolichofacial, symmetrical and balanced, with the concave soft and skeletal tissue profiles. This case was treated with a non-extraction camouflage orthodontic approach using the standard edgewise fixed appliance to correct crowding in the maxillary and mandibular dental arches and open-bite in the anterior region. The orthodontic treatment was completed within 13 months, and crowding in the maxillary and mandibular dental arches and open-bite in the anterior region were corrected. Conclusion: Camouflage orthodontic treatment is a good treatment option for skeletal class III malocclusion with a mild anterior open-bite because it can correct malocclusion with dentoalveolar compensation to obtain a good and stable occlusion. The treatment results show good results and can be accepted well by the patient.Keywords: Skeletal class III malocclusion, crowding, anterior open-bite, standard edgewise, orthodontic camouflage.
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Kati, Firas Abd. "Shortened dental arch." Journal of Oral Research S, no. 3 (March 30, 2020): 30–32. http://dx.doi.org/10.17126/joralres.2020.060.
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Al-Zubair, Nabil Muhsen. "Dental arch asymmetry." European Journal of Dentistry 08, no. 02 (April 2014): 224–28. http://dx.doi.org/10.4103/1305-7456.130608.
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ABSTRACT Objective: This study was conducted to assess the dental arch asymmetry in a Yemeni sample aged (18-25) years. Materials and Methods: The investigation involved clinical examination of 1479 adults; only 253 (129 females, 124 males) out of the total sample were selected to fulfill the criteria for the study sample. Study models were constructed and evaluated to measure mandibular arch dimensions. Three linear distances were utilized on each side on the dental arch: Incisal-canine distance, canine-molar distance and incisal-molar distance, which represent the dental arch segmental measurements. Results: When applying “t-test” at P < 0.05, no significant differences were found between the right and left canine-molar, incisal-canine and incisal-molar distances in both dental arches for both sexes. The greater variation (0.30 mm) was observed between right and left canine-molar distance in the maxillary dental arch in male and the smaller (0.04 mm) in the mandibular dental arch between the right and left canine-molar distance in females. Conclusion: The findings of the present study revealed a symmetrical pattern of dental arches, since the right and left sides showed no statistically significant difference. In general, it can be observed that the measurements related to the central incisors and canines have the widest range of reading and give the impression that the location of central incisor and canines to each other and to other teeth is the strongest factor in determining the dental arch asymmetry.
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Cuccia, Antonino Marco. "Interrelationships between dental occlusion and plantar arch." Journal of Bodywork and Movement Therapies 15, no. 2 (April 2011): 242–50. http://dx.doi.org/10.1016/j.jbmt.2010.10.007.
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Kochkonyan, Taisiya, Dmitry Domenyuk, Vladimir Shkarin, Sergei Dmitrienko, and Stanislav Domenyuk. "VARIANT ANATOMY OF TRANSITIONAL OCCLUSION DENTAL ARCH AT OPTIMAL OCCLUSAL RELATIONSHIPS." Archiv Euromedica 12, no. 2 (March 30, 2022): 128–33. http://dx.doi.org/10.35630/2199-885x/2022/12/2.32.
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Through the transitional bite period, the variability of the dental arch shape and size is due to the replacement of milk teeth with permanent ones, which feature different odontometric values. The aim of this study was to identify the main linear and angular parameters of dental arches, in view of the trusive position of the incisors with optimal functional occlusion. A stratified study was involved 76 children ages 8–12 years old, who were divided into three groups (protrusive, retrusive and mesotrusive dental arches). An analysis of cone-beam computed tomograms and plaster models of jaws was carried out, which was preceded by obtaining informed consents according to the Ethics Committee requirements. The study revealed certain features of the variant anatomy of transitional occlusion dental arch. The calculated factors allowed identifying the proportionality of the dental arch parameters to odontometric indicators. During that, the dental-diagonal factor (the ratio of the dental arch length to the incisor-molar diagonals) for the upper jaw was 1.06±0.01, for the lower arch being equal to 1.09±0.01, in all types of dental arches, which is a fact to be used in clinical orthography to predict the location of the dental arch incisor (central) point in case of shape anomalies, specifically in the anterior part. The angular parameters of the diagnostic dental pentagon will allow simulating the geometric and graphical construction of arches through the transitional occlusion period.
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AlHarbi, Seba, Eman A. Alkofide, and Abdulaziz AlMadi. "Mathematical Analyses of Dental Arch Curvature in Normal Occlusion." Angle Orthodontist 78, no. 2 (March 1, 2008): 281–87. http://dx.doi.org/10.2319/121806-516.1.
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Abstract Objective: To present a comprehensive mathematical analysis of dental arch curvature in subjects with normal occlusion. Materials and Methods: The materials studied were 40 sets of upper and lower plaster dental casts of subjects presenting with normal occlusion. The sample was equally divided into casts from male and female subjects with an age range from 18 to 25 years. Curve-fitting analyses was carried out and four main categories of functions were considered: the beta function, natural cubic splines, polynomial equations, and Hermite cubic splines. Results: The polynomial function (fourth order) was found to be a reasonable analysis when the objective is to describe the general smooth curvature of the dental arch, while a Hermite cubic spline is more appropriate when it is desired to track arch irregularities, such as evaluating treatment changes. Conclusions: Due to its advantage in providing a more naturally smooth curve, the fourth-order polynomial function may be used as a guide to fabricate customized arch wires, or even an entire fixed orthodontic appliance system.
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Ghaib, Dr Nidhal H., Dr Dheaa H. Abd Awn, and Dr Mustafa M. Al-Khatieeb. "Mandibular dental arch parameters in Down's syndrome patients with Class I occlusion. (A comparative study)." Mustansiria Dental Journal 5, no. 1 (March 29, 2018): 80–87. http://dx.doi.org/10.32828/mdj.v5i1.509.
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This study is carried out to find the dental arch form for patients with Down's syndrome and to compare the lower dental arch parameters of those patients with the corresponding norms, and to gain a correlation between the upper and lower arches for the Down's syndrome patients from previous study. A total sample of 50 patients with Down's syndrome were examined with an age ranged 14-18 years, the lower dental arch parameters were compared with another group, control, on student of an intermediate school matching with the age and Angle's classification (Class I).Study models for the upper and lower arches were constructed, then dental arch measurements were carried out and evaluated. The results show that the lower arch parameters for the patients with Down's syndrome were significantly smaller mean values than the control group for both genders with the males had greater values in inter arch distance and length, with high correlation between the upper and lower jaws .The wide arch form is the dominated arch form while the flat is the least to appear. The conclusion of the study is that the growth pattern of dental arches in Down's syndrome patients proportionally reduced when compared with those of norms, with a symmetrical configuration. Hence all arch forms are presented with different distribution.
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Dmitrienko, S. V., B. N. Davydov, D. A. Domenyuk, and S. O. Ivanyuta. "Morphometric analysis of relationships of basic dimensions of dental arts taking into account individual gnatic types." Medical alphabet 1, no. 5 (February 15, 2019): 37–44. http://dx.doi.org/10.33667/2078-5631-2019-1-5(380)-37-44.
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Aim. Determining the relationship between the main parameters of the dental arches of the upper and lower jaw in people with physiological occlusion of permanent teeth. Materials and methods. The research materials were the results of biometric measurements of plaster models of dentition of 119 people of the first period of adulthood with a full set of permanent teeth, physiological occlusion, and various gnathic and dental types of dental arches. The gnathic variants (mesognathy, dolichognathy, brachygnathy) of the dental arches were determined taking into account the dental index calculated as the ratio of the half of the sum of the 14-tooth crowns to the width of the dental arch between the second molars. Types of the dental system (normodontia, macrodontia, microdontia) were determined by the results of the summation of the width of the crowns of the upper teeth. Results. According to the results of biometric studies, it was established that regardless of the gnathic and dental type of dental arches, the ratio of the sum of the mesial-distal sizes of 14 teeth of the upper jaw to the same parameters of the lower jaw averaged 1.065 ± 0.005. The ratio of the sum of the width of the crowns of 7 teeth of each half of the dental arch to the size of the frontal-distal diagonal was 1.065 ± 0.005 both on the upper and on the lower dental arch. The ratio of the diagonal dimensions of the upper dental arch to the same size of the lower arch was also 1.065 ± 0.01 for all types of dental arches. Conclusion. The obtained ratios, as highly informative, diagnostically significant indicators, can be used to determine the compliance of the main dimensions of the dental arches of the upper and lower jaws, to characterize the physiological occlusion, to select the size of artificial teeth in people with complete adentia, to predict the shape and size of dental arches when treatment of patients with occlusion anomalies in order to achieve an optimal functional and aesthetic result.
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Heidbuchel, Kiki L. W. M., and Anne Marie Kuijpers-Jagtman. "Maxillary and Mandibular Dental-Arch Dimensions and Occlusion in Bilateral Cleft Lip and Palate Patients from 3 to 17 Years of Age." Cleft Palate-Craniofacial Journal 34, no. 1 (January 1997): 21–26. http://dx.doi.org/10.1597/1545-1569_1997_034_0021_mamdad_2.3.co_2.
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The aim of this study was to describe maxillary and mandibular dental-arch form and occlusion in bilateral cleft of the lip and palate (BCLP) from 3 to 17 years of age and to compare their characteristics with a normative sample. A sample of 22 patients with BCLP was investigated, with a noncleft control sample used for comparison. Dental-arch dimensions were studied on dental casts. A comparison between both groups was made at fixed time intervals. From 9 years of age, the cleft sample showed a significantly smaller maxillary depth. Maxillary dental-arch widths were also significantly smaller than in the control group over the whole age period. Mandibular dental-arch measurements were very similar In both groups, although smaller first-molar widths were noted in the BCLP group beginning at 12 years of age. A tendency for end-to-end occlusion was found, which became more clear with age and was most markedly in the canine region.
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Ivanyuta, Oleg, Ghamdan Al-Haraz, Dmitry Domenyuk, Sergei Dmitrienko, Stanislav Domenyuk, Sergey Ivanyuta, and Dmitry Kuleshov. "MODIFICATION OFTHE DENTAL ARCH SHAPE USING GRAPHIC REPRODUCTION METHOD AND ITS CLINICALEFFECTIVENESS IN PATIENTS WITH OCCLUSION ANOMALIES." Archiv Euromedica 10, no. 4 (December 17, 2020): 181–90. http://dx.doi.org/10.35630/2199-885x/2020/10/4.42.
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Based on the results of the dentoalveolar system morphometry performed in patients with permanent teeth physiological occlusion we have developed a method for studying the anterior dental arch. It follows the circle of geometry patterns as well as stable values in the medialdistal dimensions of the front teeth crowns. In view of the mesial-distal dimensions of 14 teeth and dental arch width between the second molars and individually built radius of the circle we modified the method of dental arches graphic reproduction. The first stage of the dental arch individual shape graphic reproduction implies designing a dental pentagon, whereas its base is the width of the dental arch between the second molars, and the median sagittal line determines the depth of the dental arch. The upper sides of the pentagon (incisor-canine diagonals) run from the central interincisal point to the canine point, while the lower sides (canine-molar diagonals) connect the canine points to the molar points. At the second stage of the dental arch individual shape graphic reproduction, a circle is outlined, whose radius is related directly to the width of the anterior dental arch, and has an inverse relationship with its depth. There is a proof offered for clinical feasibility of the method employed to predict the optimal individual shape of the dental arch through graphic reproduction in patients with class I Angel occlusion issues. The study showed that the effectiveness of therapeutic and diagnostic measures for patients with abnormal shape and size of dental arches. It can be achieved if the sequence of the graphic construction stages is strictly followed.
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da Silva Filho, Omar Gabriel, Flávio Mauro Ferrari Júnior, and Terumi Okada Ozawa. "Dental Arch Dimensions in Class II division 1 Malocclusions with Mandibular Deficiency." Angle Orthodontist 78, no. 3 (May 1, 2008): 466–74. http://dx.doi.org/10.2319/022307-89.1.
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Abstract Objective: To test the hypothesis that there is no difference in the dimensions of the upper and lower dental arches in Class II division 1 malocclusion with a mandibular deficiency compared to normal Class I occlusion dental arches. Materials and Methods: Photocopies of the dental arches of 48 patients exhibiting Class II division 1 malocclusion with mandibular deficiency and of 51 individuals with normal occlusion were compared. Mandibular deficiency was diagnosed clinically. All 99 individuals were in the permanent dentition. The ages of the subjects ranged from 11 years 4 months to 20 years (mean age = 12 years 5 months). Results: When compared to subjects with normal occlusion, the upper dental arches of the Class II division 1 patients presented reduced transverse dimensions and longer sagittal dimensions while the lower arches were less influenced. Conclusion: The hypothesis is rejected. Significant differences are present between the dimensions of the upper and lower dental arches in Class II division 1 malocclusion (with a mandibular deficiency and in the permanent dentition) compared to normal Class I occlusion dental arches.
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Walter, M. H., A. Weber, B. Marré, I. Gitt, J. Gerß, W. Hannak, S. Hartmann, et al. "The Randomized Shortened Dental Arch Study." Journal of Dental Research 89, no. 8 (April 16, 2010): 818–22. http://dx.doi.org/10.1177/0022034510366817.
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Wolfart, S., B. Marré, B. Wöstmann, M. Kern, T. Mundt, R. G. Luthardt, J. Huppertz, et al. "The Randomized Shortened Dental Arch Study." Journal of Dental Research 91, no. 7_suppl (June 14, 2012): S65—S71. http://dx.doi.org/10.1177/0022034512447950.
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The scientific evidence concerning prosthodontic care for the shortened dental arch (SDA) is sparse. This randomized multicenter study aimed to compare two common treatment options: removable partial dental prostheses (RPDPs) for molar replacement vs. no replacement (SDA). One of the hypotheses was that the follow-up treatment differs between patients with RPDPs and patients with SDAs during the 5-year follow-up period. Two hundred and fifteen patients with complete molar loss in one jaw were included in the study. Molars were either replaced by RPDPs or not replaced according to the SDA concept. A mean number of 4.2 (RPDP) and 2.8 (SDA) treatments for biological or technical reasons occurred during the 5-year observation time per patient. Concerning the biological aspect, no significant differences between the groups could be shown, whereas treatment arising from technical reasons was significantly more frequent for the RPDP group. When the severity of treatment was analyzed, a change over time was evident. When, at baseline, only follow-up treatment with minimal effort is required, over time there is a continuous increase to moderate and extensive effort observed for both groups ( Controlled-trials.com number ISRCTN97265367).
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Wadia, Reena. "Simultaneous versus individual-arch dental bleaching." British Dental Journal 233, no. 8 (October 28, 2022): 649. http://dx.doi.org/10.1038/s41415-022-5179-5.
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Othman, Rawand J., and Hiwa S. Khidir. "Differences in Dental Arch Dimensions in a Sample of Kurdish Population among Different Occlusal Categories." Polytechnic Journal 10, no. 1 (June 30, 2020): 51–55. http://dx.doi.org/10.25156/ptj.v10n1y2020.pp51-55.
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It is essential to know dental arch dimensions to provide accurate diagnosis and treatment planning to ensure the satisfactory outcome of orthodontic treatment. The aim of the present study was to measure and compare dental arch dimensions of a Kurdish sample in Erbil city with normal and different classes of malocclusion. Arch width and length were measured by an electronic digital caliper on a total of 150 orthodontic models of school students aged 16–20 years of different occlusal relationships (Class I normal occlusion, Class I, Class II division I, Class II Division II, and Class III malocclusions). The results showed that (1) girls have smaller arch parameters than boys; (2) Class II division II malocclusion showed a significantly smaller upper inter canine width, arch length, incisor molar distance, and incisor canine distance when compared to all other groups; (3) the upper inter premolar and inter molar width were significantly narrower in Class II division I malocclusion than of normal occlusions and Class III malocclusion and also narrower in Class I malocclusion than in normal occlusions for both arches; (4) the arch length was significantly longer in Class II division I when compared to Class II division II, Class I malocclusions (P < 0.01), Class III malocclusion and Class I normal occlusion (P < 0.05), and (5) no statistically significant differences were found in all the arch dimensions for Class III malocclusion when compared with the normal occlusion. In conclusion, girls had smaller arch dimension than boys and Class II Division II malocclusion showed smaller arch in all dimensions while Class II division I malocclusion revealed narrower arch width and longer arch length.