Journal articles on the topic 'Resorption'
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Kjær, Inger, Carsten Strøm, and Nils Worsaae. "Regional Aggressive Root Resorption Caused by Neuronal Virus Infection." Case Reports in Dentistry 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/693240.
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During orthodontic treatment, root resorption can occur unexplainably. No clear distinction has been made between resorption located within specific regions and resorption occurring generally in the dentition. The purpose is to present cases with idiopathic (of unknown origin) root resorption occurring regionally. Two cases of female patients, 26 and 28 years old, referred with aggressive root resorption were investigated clinically and radiographically. Anamnestic information revealed severe virus diseases during childhood, meningitis in one case and whooping cough in the other. One of the patients was treated with dental implants. Virus spreading along nerve paths is a possible explanation for the unexpected resorptions. In both cases, the resorptions began cervically. The extent of the resorption processes in the dentition followed the virus infected nerve paths and the resorption process stopped when reaching regions that were innervated differently and not infected by virus. In one case, histological examination revealed multinuclear dentinoclasts. The pattern of resorption in the two cases indicates that innervation is a factor, which under normal conditions may protect the root surface against resorption. Therefore, the normal nerve pattern is important for diagnostics and for predicting the course of severe unexpected root resorption.
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Yamaguchi, M., N. Aihara, T. Kojima, and K. Kasai. "RANKL Increase in Compressed Periodontal Ligament Cells from Root Resorption." Journal of Dental Research 85, no. 8 (August 2006): 751–56. http://dx.doi.org/10.1177/154405910608500812.
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The ligand receptor activator of NFκB (RANKL) plays an important role in osteoclast formation. However, very little is known about the relationship between external apical root resorption during orthodontic treatment and RANKL. We hypothesized that compressive force is responsible for RANKL formation and up-regulation of osteoclastogenesis in periodontal ligament (PDL) cells from patients with severe orthodontically induced external apical root resorption. RANKL and osteoprotegerin (OPG) production, TRAP-positive cells, and resorptive pits were determined. The increase of RANKL and the decrease of OPG were greater in the severe root resorption group than in the non-resorption group. The numbers of TRAP-positive cells and resorptive pits were also increased in the severe root resorption group than in the non-resorption group. These results support the hypothesis that the compressed PDL cells obtained from tissues with severe external apical root resorption may produce a large amount of RANKL and up-regulate osteoclastogenesis.
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Mazur, Marta, Roberto Marasca, Livia Ottolenghi, Iole Vozza, Francesco Covello, Andrea Zupancich, Emanuela Cristiani, and Alessia Nava. "Different Resorptive Patterns of Two Avulsed and Replanted Upper Central Incisors Based on Scanning Electron Microscopy and Stereomicroscopic Analysis: A Case Report." Applied Sciences 10, no. 10 (May 21, 2020): 3551. http://dx.doi.org/10.3390/app10103551.
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Dental trauma resulting in permanent tooth avulsion commonly affects the young population. The prognosis of replantation after avulsion depends on the natural history of inflammatory and replacement resorption. Several risk factors for type and onset of external resorption have been defined. This case study describes different resorptive patterns observed in two upper central incisors belonging to a single individual, avulsed in the same moment, and replanted after thirty-six hours of dry storage. The roots were analyzed by scanning electron microscopy and stereomicroscope imaging, to obtain an in-depth analysis of the resorptive pattern. The aim of this report is to: (i) underline the high variability in the incidence of root resorption after replantation across and within types of teeth and resorption; and (ii) underline the possible concurrence of different factors affecting the onset and type of resorptive pattern. In conclusion, an unpredictable pattern of resorption may account for the poor prognosis when teeth are replanted outside the current recommendations.
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Ferlini Filho, João, and Roberto Brandão Garcia. "Estudo radiográfico e microscópico das reabsorções radiculares na presença de periodontites apicais crônicas (microscopia óptica e eletrônica de varredura)." Revista da Faculdade de Odontologia de Porto Alegre 40, no. 1 (July 24, 2021): 60–64. http://dx.doi.org/10.22456/2177-0018.111056.
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The objective of this dissertation, which employed 72 extracted human teeth, carrices of periapical lesion, was the morphological study of the resorptions, trying to relate their microscopic identification With the presence or not of the phenomenon in the X-ray of diagnosis. In a first stage we proceeded to the analysis of the X-ray pictures related to the seventy two samples, then in a second stage we submitted chem to Che analysis in optical microscopy. The third stage of our work comprised the confrontation of the radiographic and microscopic findings of the sampling, observing the aspects that occurred in both analyses or in just one of them. The results of the radiographic analysis showed that 63,88% of the samples did not allow to identify radicular resorption, being included in the monobservable radicular resorption category. The rest of the sampling, 36, 11% allowed to see in the X-ray some form of resorption called ohservable radicular resorption. In the microscopic analysis, 5 of the roots kept complete radicular contour, being included in the category of absent radicular resorption. However, most part of the roots, 94,44%, showed some kind of resorption, being included in the group with present radicular resorption. The present dissertation also showed evidence that the conventional X-ray pictures are not efficient resources for the diagnosis of radicular resorptions at initial stages
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Singh, Shishir, and Gaurav Kulkarni. "Resorptions revisited - internal resorption : Two case reports." Endodontology 25, no. 1 (2013): 129. http://dx.doi.org/10.4103/0970-7212.352304.
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Nireeksha, B. N. "Management of invasive external cervical resorption in maxillary anterior teeth: A case report." Journal of Restorative Dentistry and Endodontics 1 (November 24, 2022): 63–66. http://dx.doi.org/10.25259/jrde_2_2022.
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The progressive breakdown of mineralized tooth tissue caused by overactive resorptive cells is known as root resorption. Root resorption can be divided into two types: Normal and pathologic. In most of cases of internal resorption and external inflammatory resorption root canal therapy is indicated. It may or may not be indicated in cases of invasive resorption, and it is not suggested in cases of replacement or pressure resorption (unless unrelated pulpal conditions necessitate endodontic intervention). Early detection and treatment of these defects might be beneficial to the patient and increase the chances of saving the tooth. In this case, report the description of external resorption post-orthodontic treatment has been restored and followed up and has shown a good prognosis.
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Consolaro, Alberto. "The four mechanisms of dental resorption initiation." Dental Press Journal of Orthodontics 18, no. 3 (June 2013): 7–9. http://dx.doi.org/10.1590/s2176-94512013000300004.
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The aim of this study is to present a classification with a clinical application for root resorption, so that diagnosis will be more objective and immediately linked to the source of the problem, leading the clinician to automatically develop the likely treatment plan with a precise prognosis. With this purpose, we suggest putting together all diagnosed dental resorptions into one of these four criteria: 1) Root resorption caused by cementoblast cell death, with preservation of the Malassez epithelial rests. 2) Root resorption by cementoblasts and Malassez epithelial rests death. 3) Dental resorption by odontoblasts cell death with preservation of pulp vitality. 4) Dental resorption by direct exposure of dentin to gingival connective tissue at the cementoenamel junction gaps.
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Ahir, Bhavesh, Vaishali Parekh, Anjali Vats, and Ankur Vats. "Mineral Trioxide Aggregate in the Treatment of External Invasive Resorption: A Case Report." Dental Journal of Advance Studies 01, no. 03 (December 2013): 173–75. http://dx.doi.org/10.1055/s-0038-1671974.
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AbstractExternal invasive root resorption may occur as a consequence of trauma, orthodontic treatment, intracoronal bleaching and surgical procedures and may lead to the progressive and destructive loss of tooth structure. Depending on the extent of the resorptive process, different treatment regimens have been proposed. A 20-year-old female patient presented with tooth showing signs and symptoms of pain in 21 with extensive invasive resorption in middle third of root canal. After root canal treatment, The resorption area was chemomechanically debrided using ultrasonic tips and irrigant solution. MTA was used to fill the resorptive defect and the coronal access was temporarily sealed. Radiographs at 3 and 12 months showed adequate repair of the resorption and endodontic success. Clinically, the tooth was asymptomatic and found to be functioning well.
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Opacic-Galic, Vanja, and Slavoljub Zivkovic. "Endodontic therapy of pathological resorptions of tooth root." Serbian Dental Journal 51, no. 3 (2004): 130–35. http://dx.doi.org/10.2298/sgs0403130o.
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Pathological resorptions of a tooth root very often represent both a diagnostic and therapeutical problem. The goal of this study was, based on clinical research on a number of pathological resorptions of various types and localization in relation to time, to analyze and evaluate applied endodontic therapy. Clinical research covered 30 patients (40 root canals in total). 18 teeth (22 canal) with external and 12 (18 canal) with internal root resorptions received endodontic therapy. After standard endodontic procedure had been applied (cleaning and canal shaping) calcium hydroxide paste was used as a canal medicament for cases with internal resorptions and calcium hydroxide paste and points for cases with external resorptions. Canal opturations were done by modified technique of lateral condesation applying AH- Plus paste. The obtained results showed that in cases of internal resorption after 12 months, 11 cases were successful and only 1 failure occurred. In case of external resorption, after the same period of time, 15 cases were successful and failures occurred in 3 cases. The success of resorption treatment depends on many factors but, primarily, it depends on time and accuracy of diagnosis and properly applied treatment and root canal opturation.
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Vedavathi, B., DV Swapna, K. Rashmi, Jayshree Hegde, Veena Suresh Pai, and GR Krishna Kumar. "A 3-Year Follow-up Case Report of a Successfully treated Perforating Internal Root Resorption using MTA." World Journal of Dentistry 6, no. 4 (2015): 235–38. http://dx.doi.org/10.5005/jp-journals-10015-1350.
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ABSTRACT Internal root resorption is the progressive destruction of intraradicular dentin along the canal wall as a result of clastic activity. Perforating internal root resorption poses a diagnostic and treatment challenge to the clinician. Poor prognosis of such teeth makes extraction a treatment option. Presented herein is a case report of a mandibular second premolar with advanced perforating internal root resorption in the middle third of the root. Advanced diagnostic method, cone-beam computed tomography (CBCT) was used for definitive diagnosis and treatment planning. Sectional obturation with gutta-percha was performed up to the resorptive defect and mineral trioxide aggregate (MTA) was used to fill the resorptive defect and rest of the canal space. At a follow-up of 3 years, the patient was clinically asymptomatic with good bone repair around the resorptive defect. How to cite this article Rashmi K, Hegde J, Swapna DV, Pai VS, Vedavathi B, Kumar GRK. A 3-Year Follow-up Case Report of a Successfully treated Perforating Internal Root Resorption using MTA. World J Dent 2015;6(4):235-238.
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Travassos, Rosana Maria Coelho, Larianne de Sousa Moisés, Ana Roberta Negromonte Da Silva, Douglas Hilderlandson das Neves Silva, Amanda Nascimento Cavalcanti Bezerra, Ana Caroline Chalegre de Oliveira, Victor Felipe Farias do Prado, and Paulo Maurício Reis de Melo Júnior. "PREVALENCE OF INTERNAL AND EXTERNAL ROOT RESORPTION IN PERMANENT ANTERIOR TEETH USING DIGITAL AND DIGITALIZED PERIAPICAL RADIOGRAPHS." RECISATEC - REVISTA CIENTÍFICA SAÚDE E TECNOLOGIA - ISSN 2763-8405 2, no. 2 (February 25, 2022): e2291. http://dx.doi.org/10.53612/recisatec.v2i2.91.
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Objetive: This study aimed to evaluate the prevalence of internal and external resorption in periapical digital radiographs in permanent anterior teeth of patients attended in a private clinic of radiology in the city of Recife, Pernambuco, Brazil, in a period of three years. Study Design: A retrospective and observation study design was realized with the aim of observing an presence of events. A total of 4630 radiographs were analyzed from the archives of the clinic. Thus, it was observed the presence of internal and external root resorption and their location in in digital and digitalized periapical radiographs.Results: It was observed more external than internal resorption (99,65%) and the teeth most affected by dental resorptions were the upper incisors (11,8%). The apical and cervical thirds were also involved with the same frequency in internal resorption while the apical third was the most involved in external resorption. Conclusion: Digital radiograph has a important and essential paper in correct diagnosis of root resorption and to conduct a correct endodontic treatment.
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Campos, Marcio Jose da Silva, Helen Vidon Gomes, Paula Liparini Caetano, Marcelo Reis Fraga, and Robert Willer Farinazzo Vitral. "Is relevant the underestimation of irregular apical root resorption by periapical radiographs?" HU Revista 45, no. 3 (November 28, 2019): 237–43. http://dx.doi.org/10.34019/1982-8047.2019.v45.28678.
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Introduction: Periodic control of root resorption during orthodontic treatment is frequently made by two-dimensional radiographic examinations, in which irregular resorptions are not detected buccolingually. Aim: Quantifying the resorbed root area of incisors with irregular apical root resorption underestimated by two-dimensional radiographic methods. Materials and Methods: Cone beam computed tomography images of 18 patients whose incisors presented irregular apical root resorption underestimated by two-dimensional radiographic methods and their contralateral correspondents without resorption were evaluated. In sound incisors, a regular apical root resorption was simulated at the same height as that of the irregularly resorbed incisors. The apical and total root surface areas of the incisors with irregular root resorption and simulated regular root resorption were measured and compared. The Student´s t test for paired samples was used at a level of significance of 0.05. Results: The apical area of the incisors with irregular root resorption was significantly smaller than that of the incisors with simulated regular resorption (p<0.001). There was no significant difference in the comparison between total root surface areas (p=0.435). Conclusion: Underestimation of the irregular root resorption shown on two-dimensional images was significant when analyzing the apical area of the tooth. However, when considering the total root surface area of the tooth, which is responsible for the most part of the periodontal support, such underestimation was not significant.
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Carron, CP, DM Meyer, VW Engleman, JG Rico, PG Ruminski, RL Ornberg, WF Westlin, and GA Nickols. "Peptidomimetic antagonists of alphavbeta3 inhibit bone resorption by inhibiting osteoclast bone resorptive activity, not osteoclast adhesion to bone." Journal of Endocrinology 165, no. 3 (June 1, 2000): 587–98. http://dx.doi.org/10.1677/joe.0.1650587.
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Osteoclasts are actively motile on bone surfaces and undergo alternating cycles of migration and resorption. Osteoclast interaction with the extracellular matrix plays a key role in the osteoclast resorptive process and a substantial body of evidence suggests that integrin receptors are important in osteoclast function. These integrin receptors bind to the Arg-Gly-Asp (RGD) sequence found in a variety of extracellular matrix proteins and it is well established that the interaction of osteoclast alpha v beta 3 integrin with the RGD motif within bone matrix proteins is important in osteoclast-mediated bone resorption. In this study, we characterized the effects of two synthetic peptidomimetic antagonists of alpha v beta 3, SC-56631 and SC-65811, on rabbit osteoclast adhesion to purified matrix proteins and bone, and on bone resorption in vitro. SC-56631 and SC-65811 are potent inhibitors of vitronectin binding to purified alpha v beta 3. Both SC-56631 and SC-65811 inhibited osteoclast adhesion to osteopontin- and vitronectin-coated surfaces and time-lapse video microscopy showed that osteoclasts rapidly retract from osteopontin-coated surfaces when exposed to SC-56631 and SC-65811. SC-56631 and SC-65811 blocked osteoclast-mediated bone resorption in a dose-responsive manner. Further analysis showed that SC-65811 and SC-56631 reduced the number of resorption pits produced per osteoclast and the average pit size. SC-65811 was a more potent inhibitor of bone resorption and the combination of reduced pit number and size led to a 90% inhibition of bone resorption. Surprisingly, however, osteoclasts treated with SC-65811, SC-56631 or the disintegrin echistatin, at concentrations that inhibit bone resorption did not inhibit osteoclast adhesion to bone. These results suggest that alphavbeta3 antagonists inhibited bone resorption by decreasing osteoclast bone resorptive activity or efficiency but not by inhibiting osteoclast adhesion to bone per se.
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Zhu, Dehuang, Suhong Peng, Jinyan Wang, and Dafeng Hui. "Responses of Nutrient Resorption to Human Disturbances in Phoebe bournei Forests." Forests 13, no. 6 (June 10, 2022): 905. http://dx.doi.org/10.3390/f13060905.
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Nutrient resorption plays an important role in the nutrient conservation of plants and ecosystem nutrient cycling. Although community succession and nutrient addition could regulate plant nutrient resorption, how resorptions of foliar nutrients vary with human disturbances remains unclear. With the economic development, Phoebe bournei forests (PF) have suffered varying degrees of human disturbances in China. In this study, the leaf nutrient resorption efficiency (RE) of the PF under two disturbances (i.e., severe and mild disturbances) were investigated. Results showed that the phosphorus (P) contents of green leaf, senesced leaf, and soil were low under both disturbances, reflecting that the PF had a potential P limitation. Phosphorus and potassium (K) REs were higher under the severe disturbance than those under the mild disturbance. The potassium resorption efficiency was the highest among the three REs under both disturbances. In addition, nutrient resorption efficiencies increased with green leaf nutrient contents under both disturbances. However, there were negative significant relationships of specific leaf area and leaf dry matter content with nutrient resorption under both disturbances. These findings provide a new perspective of nutrient resorption and revealed the potential impact of human disturbances on the nutrient cycle in forest ecosystems.
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Naik, Rasika A., Manoj M. Ramugade, Nilofar B. Attar, and Kishor D. Sapkale. "Cone Beam Computed Tomography-guided Management of Cervical Perforative Internal Resorption in Permanent Mandibular First Molar." International Journal of Prosthodontics and Restorative Dentistry 6, no. 3 (2016): 73–77. http://dx.doi.org/10.5005/jp-journals-10019-1160.
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ABSTRACT Internal resorption in the permanent dentition is a rare pathologic condition. Clinical differentiation of perforative cervical internal resorption from cervical external resorption is considered to be a challenging task. Advanced imaging techniques, such as cone beam computed tomography (CBCT) have proven vital diagnostic tools in the detection and management of these lesions. Management of a perforated internal resorption needs comprehensive endorestorative and periodontal approach. This article describes 1 year follow-up of the successfully managed perforative cervical internal resorption in permanent mandibular first molar. The affected tooth was endodontically treated, and the resorptive defect was restored with resin-modified glass ionomer cement (RMGIC) through periodontal flap surgery. How to cite this article Naik RA, Ramugade MM, Attar NB, Sapkale KD. Cone Beam Computed Tomography-guided Management of Cervical Perforative Internal Resorption in Permanent Mandibular First Molar. Int J Prosthodont Restor Dent 2016;6(3):73-77.
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Bruno Oliveira de Aguiar Santos, Diego Santiago de Mendonça, Denise Lins de Sousa, José Jeová Siebra Moreira Neto, and Rebeca Bastos Rocha de Araújo. "Root resorption after dental traumas: classification and clinical, radiographic and histologic aspects." RSBO 8, no. 4 (December 28, 2012): 439–45. http://dx.doi.org/10.21726/rsbo.v8i4.1095.
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Introduction: One of the most common sequelae observed after dental trauma is root resorption. Objective: The aim of this study was to classify and discuss the external root resorption after a dental trauma, based on a literature review. Literature review: A bibliographic search was performed in the following databases: Medline, PubMed, and Lilacs, from 1997 to 2010. The following descriptors were used: Root resorption, Dental trauma and Classification. From a total of 152 articles found, 25 were selected: 24 in English and 1 in Spanish. Classic articles were also used in our study. External root resorption after dental traumas can be divided into superficial, inflammatory and replacement. It can also be verified in primary dentition as physiological and atypical resorptions. Conclusion: Each type of resorption presents clinical features as well as radiographic and histological aspects. Therefore, the dentist should know these characteristics to perform an early diagnosis and appropriate treatment, minimizing the sequelae related to this problem. Moreover, in primary dentition, the differential diagnosis between physiological and pathological resorption is important to avoid over-treatment.
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Zhong, Jingxiao, Junning Chen, Richard Weinkamer, M. Ali Darendeliler, Michael V. Swain, Andrian Sue, Keke Zheng, and Qing Li. "In vivo effects of different orthodontic loading on root resorption and correlation with mechanobiological stimulus in periodontal ligament." Journal of The Royal Society Interface 16, no. 154 (May 2019): 20190108. http://dx.doi.org/10.1098/rsif.2019.0108.
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Orthodontic root resorption is a common side effect of orthodontic therapy. It has been shown that high hydrostatic pressure in the periodontal ligament (PDL) generated by orthodontic forces will trigger recruitment of odontoclasts, leaving resorption craters on root surfaces. The patterns of resorption craters are the traces of odontoclast activity. This study aimed to investigate resorptive patterns by: (i) quantifying spatial root resorption under two different levels of in vivo orthodontic loadings using microCT imaging techniques and (ii) correlating the spatial distribution pattern of resorption craters with the induced mechanobiological stimulus field in PDL through nonlinear finite-element analysis (FEA) in silico . Results indicated that the heavy force led to a larger total resorption volume than the light force, mainly by presenting greater individual crater volumes ( p < 0.001) than increasing crater numbers, suggesting that increased mechano-stimulus predominantly boosted cellular resorption activity rather than recruiting more odontoclasts. Furthermore, buccal–cervical and lingual–apical regions in both groups were found to have significantly larger resorption volumes than other regions ( p < 0.005). These clinical observations are complemented by the FEA results, suggesting that root resorption was more likely to occur when the volume average compressive hydrostatic pressure exceeded the capillary blood pressure (4.7 kPa).
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Simic, Sanja, Predrag Nikolic, Jasna Pavlovic, Vladanka Vukicevic, and Amila Vujacic. "Possible root resorption of adjacent teeth due to maxillary impacted canines - comparative analysis of cone beam computed tomography and panoramic imaging." Vojnosanitetski pregled, no. 00 (2022): 21. http://dx.doi.org/10.2298/vsp201004021s.
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Background/Aim. Frequently reported phenomenon associated with impacted maxillary canines is root resorption of the adjacent teeth. The reported incidence of root resorption also depends on the radiographic imaging method used. The aim of the present study was to evaluate correlation between two radiographic methods: the panoramic imaging (OPT) and cone beam computed tomography (CBCT) in diagnosing contact between the impacted canine with the adjacent teeth and the existence of their resorption. Methods. This study included 64 subjects, aged 12 to 33 years, with 80 impacted maxillary canines not previously treated orthodontically. First, positions of impacted maxillary canines and possible root resorption of adjacent teeth were estimated on the OPT and after that on the CBCT. Results. The estimated prevalence of root resorption of permanent teeth was significantly different concerning estimation of OPT and CBCT imaging. Root resorption of adjacent teeth was found in 25% of the OPT, but in 66.25% of the CBCT. Lateral incisor was the tooth most commonly affected by root resorption. It is especially important that premolar resorption was not detected at all using OPT. Conclusion. There was a highly significant difference between OPT and CBCT analysis concerning relationship of the impacted canine and adjacent teeth and their possible resorptions. CBCT is a more accurate and precise examination method compared to OPT for the localization of impacted teeth and the possible presence of root resorption of the adjacent teeth.
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Fuller, K., J. M. Owens, C. J. Jagger, A. Wilson, R. Moss, and T. J. Chambers. "Macrophage colony-stimulating factor stimulates survival and chemotactic behavior in isolated osteoclasts." Journal of Experimental Medicine 178, no. 5 (November 1, 1993): 1733–44. http://dx.doi.org/10.1084/jem.178.5.1733.
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Macrophage colony-stimulating factor (M-CSF) is known to play an important role in osteoclast formation. However, its actions on mature cells have not been fully characterized. We now report that M-CSF dramatically stimulates osteoclastic motility and spreading; osteoclasts responded to a gradient of M-CSF with orientation, and random cell polarization occurred after isotropic exposure. M-CSF also supported the survival of osteoclasts by preventing apoptosis. Paradoxically, M-CSF inhibits bone resorption by isolated osteoclasts. We found that this was effected predominantly by reduction in the number of excavations. Thus, M-CSF showed a propensity to suppress resorption through a reduction in the proportion of cells that were resorbing bone. Our data suggest that apart from the established role of M-CSF in the provision of precursors for osteoclastic induction, a major role for M-CSF in bone resorption is to enhance osteoclastic survival, migration, and chemotaxis. It seems appropriate that during these processes resorptive functions should be suppressed. We suggest that M-CSF continues to modulate osteoclastic activity once osteoclasts are on resorptive sites, through regulation of the balance between resorption and migration, such that not only the quantity, but the spatial pattern of resorption can be controlled by adjacent M-CSF-secreting cells of osteoblastic lineage.
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Fuller, Karen, Barrie Kirstein, and Timothy J. Chambers. "Regulation and enzymatic basis of bone resorption by human osteoclasts." Clinical Science 112, no. 11 (May 1, 2007): 567–75. http://dx.doi.org/10.1042/cs20060274.
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Although much has been learned recently of the mechanisms that regulate osteoclastic differentiation, much less is known of the means through which their resorptive activity is controlled. This is especially so for human osteoclasts. We have recently developed an assay that allows us to measure resorptive activity while minimizing confounding effects on differentiation by optimizing osteoclastogenesis, so that measurable resorption occurs over a short period, and by relating resorption in each culture during the test period to the resorption that had occurred in the same culture in a prior control period. In the present study, we found that RANKL (receptor activator of nuclear factor κB ligand) strongly stimulated the release of CTX-I (C-terminal telopeptide degradation product of type I collagen) by osteoclasts over a similar range to that over which it induces osteoclastic differentiation, consistent with a distinct action on osteoclastic function. CT (calcitonin) dose-dependently inhibited bone resorption, whereas PTH (parathyroid hormone), IL (interleukin)-1, TNF-α (tumour necrosis factor-α), IL-6, IL-8, VEGF (vascular endothelial growth factor), MCP-1 (monocyte chemoattractant protein-1), MIP-1γ (macrophage inflammatory protein-1γ), IFN (interferon)-γ and dibutyryl cGMP had no significant effect. Ca2+, cyclosporin A, IFN-β and dibutyryl cAMP all strongly suppressed resorption. Bone resorption was also strongly suppressed by alendronate, the cysteine protease inhibitor E64 and the cathepsin K inhibitor MV061194. Inhibitors of MMPs (matrix metalloproteinases) had no effect on CTX-I release. Moreover, the release of the MMP-derived collagen fragment ICTP (C-terminal cross-linked telopeptide of type I collagen) represented less that 0.01% of the quantity of CTX-I released in our cultures. This suggests that MMPs make, at most, a very small contribution to the bone-resorptive activity of osteoclasts.
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Spirina, Anna S., and David A. Crossley. "Maintenance of oral function in 3 cats with dental resorption." Acta Veterinaria Brno 89, no. 1 (2020): 55–60. http://dx.doi.org/10.2754/avb202089010055.
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Mandibular molar tooth function is important for cats, however, current veterinary dental practice is to extract teeth affected by even very small resorptive lesions. The aim of this article was to describe an attempt at salvaging mandibular molar teeth where the mesial root and associated crown remained unaffected by resorption. Three cats presented with localised resorption of the distal root of a mandibular molar tooth were treated by hemisection, extraction of the distal root and endodontic treatment of the mesial root. The oral function was maintained in all three cats with no clinical evidence of pain or further resorption at follow-up 10 months post treatment. One cat was also examined at 27 months post treatment, at which stage there was still no oral discomfort and the tooth appeared fine but there were radiographic signs suggestive of early apical resorption. Whilst longer term follow-up is required, it appears that hemisection may be an acceptable treatment for these localised resorptive lesions, at least for the short to medium term.
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Panainte, Irinel, Claudia –. Georgeta Grancea, Valentina –. Tamara Zamfir – Buta, and Mariana Pacurar. "Apical Root Resorption After Orthodontic Treatment." European Scientific Journal, ESJ 12, no. 24 (August 30, 2016): 43. http://dx.doi.org/10.19044/esj.2016.v12n24p43.
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Aim of the studyː to find if apical root resorption is related to orthodontic treatment time, type of appliance used and which are the most susceptible teeth to develop this type of resorption. Material and methodsː 70 patients (27 males and 43 females) selected from patients reffered for an orthodontic treatment at the Orthodontic Department of Faculty of Dentistry, University of Medicine and Pharmacy from TirguMures. The mean age at the beginning of treatment was 15.11 years for males and 14.67 years for females subjects. At the end of treatment, on their panormaic radiographs it was measured apical root resorption on incisors, premolars and molars in the upper and lower arch. Resultsː Root resorption was significantly (p< 0.05) correlated with fixed appliance treatment (49 percent). Patients with the longest treatment periods presented with significantly (p<0.05) more grade 2 resorptionː 28 months (± 2.6 SD) in the upper arch and 30 months (± 3.2 SD) in the lower arch. In the patients with the lowest treatment period (16 months in the maxilla and 18 months in the mandible arch) it was found no resorption. In the upper arch most of the patients (22.22 % males and 18.6% females) showed a grade 2 resorption in the incisor area. Root resorption of the premolars was seen in 18.5% of the male patients (7.4% with grade 2 ) and in 16.26 % of the female patients (6.97 with grade 2). Conclusionsː There is a high correlation between the orthodontic treatment time and apical root resorption. Most exposed to this process are incisors from bot, upper and lower arch. Less resorption was noticed in the premolar area.
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Rotondi, Olivia, PhiAnh Waldon, and Sahng G. Kim. "The Disease Process, Diagnosis and Treatment of Invasive Cervical Resorption: A Review." Dentistry Journal 8, no. 3 (July 1, 2020): 64. http://dx.doi.org/10.3390/dj8030064.
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Invasive cervical resorption (ICR) is a localized, subepithelial, supra-osseous resorptive process of the tooth. Although there are several predisposing factors associated with ICR, its etiology and pathogenesis are poorly understood. The damage to the protective layer on the external root surface appears to allow for the attachment of clastic cells and initiate the resorptive process, which is confined by the inner protective pericanalar resorption-resistant sheet surrounding the root canal space. The use of cone-beam computed tomography (CBCT) is recommended for the diagnosis and assessment of a resorptive lesion. Based on the thorough evaluation of the size and location of the ICR lesion using CBCT, surgical or nonsurgical treatment can be chosen to address the source of the resorption. This review discusses the current status of knowledge regarding the biology of ICR lesions as well as their external or internal treatment using hydraulic calcium silicate-based materials. Future clinical outcome studies are necessary to evaluate the impact of hydraulic calcium silicate-based materials on the healing of ICR lesions.
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Umashetty, Girish, Upendra Hoshing, Suvarna Patil, and Nishant Ajgaonkar. "Management of Inflammatory Internal Root Resorption with Biodentine and Thermoplasticised Gutta-Percha." Case Reports in Dentistry 2015 (2015): 1–4. http://dx.doi.org/10.1155/2015/452609.
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Internal root resorption is a chronic inflammatory process initiated within the pulp space with the loss of dentin. This condition demands a comprehensive understanding of the pathologic process, so as to identify the cause and arrest the resorptive phenomena. It is a rare occurrence, asymptomatic, with slow progression, detected through routine radiographic examination, where it appears as a radiolucent lesion. This paper reports a clinical case of inflammatory internal root resorption in the premolar tooth. Because it is asymptomatic, internal root resorption needs an early diagnosis in order to institute the endodontic treatment before the process compromises the remaining mineralized structures of the tooth. Biodentine was used to reinforce the weaker structures in the root. Thermoplasticised gutta-percha was used to completely obturate the defect. Ten-month follow-up showed arrest of internal root resorption.
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Towhidul Alam, A. S. M., Christopher L. H. Huang, David R. Blake, and Mone Zaidi. "A hypothesis for the local control of osteoclast function by Ca2+, nitric oxide and free radicals." Bioscience Reports 12, no. 5 (October 1, 1992): 369–80. http://dx.doi.org/10.1007/bf01121500.
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Several important conclusions have recently emerged from in vitro studies on the resorptive cell of bone, the osteoclast. First, it has been established that osteoclast function is modulated locally, by changes in the local concentration of Ca2+ caused by hydroxyapatite dissolution. It is thought that activation by Ca2+ of a surface membrane Ca2+ receptor mediates these effects, hence providing a feedback control. Second, a number of molecules produced locally by the endothelial cell, with which the osteoclast is in intimate contact, have been found to affect bone resorption profoundly. For instance, the autocoid nitric oxide strongly inhibits bone resorption. Finally, reactive oxygen species have been found to aid bone resorption and enhance osteoclastic activity directly. Here, we will attempt to integrate these control mechanisms into a unified hypothesis for the local control of bone resorption.
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Yeng, Thai. "Invasive Cervical Resorption of a Mandibular Molar Managed with Vital Pulp Therapy: Exemplar Case Study." Open Access Journal of Dental and Oral Surgery (OAJDOS) 3, no. 3 (September 8, 2022): 1–4. http://dx.doi.org/10.54026/oajdos/1039.
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This exemplar case highlights the importance of conservative treatment to protect the pulpal health of an invasive cervical resorption of a mandibular molar tooth with pulpal exposure. The resorptive site was explored and trichloroacetic acid (TCA) was placed on the localized defect. Following curettage of the resorptive tissue, a small pulp exposure occurred. Direct pulp capping with Dycal, a calcium hydroxide-based material, was used, and the molar was restored with glass ionomer cement. At the 18-month review, the molar tooth demonstrated both clinical (positive pulpal response) and radiographic (absence of any periapical radiolucency) success. Clinical relevance Direct pulp capping with calcium hydroxide cement is an inexpensive, conservative, and easy treatment option for pulpal exposure during the management of a Class 2 invasive cervical resorption case. Objective To demonstrate the importance of preserving the pulp in the management of a Class 2 invasive cervical resorption lesion.
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Martins, Giovana Gonçalves, Ingrid Araújo de Oliveira, and Alberto Consolaro. "The mechanism: how dental resorptions occur in ameloblastoma." Dental Press Journal of Orthodontics 24, no. 4 (August 2019): 21–32. http://dx.doi.org/10.1590/2177-6709.24.4.021-032.oin.
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ABSTRACT Knife-edge or blunt root resorptions characterize ameloblastomas and are pathognomonic for this tumor, because they differentiate ameloblastomas from simple bone cysts, odontogenic keratocysts and nasopalatine duct cysts, which do not lead to resorption of involved teeth. Despite the very high frequency and importance of these characteristics for a differential diagnosis, a microscopic examination should also be conducted before defining the diagnosis and the treatment plan for these cases. This paper describes a six-step hypothesis to explain the mechanism by which ameloblastomas promote the characteristic root resorptions found in association with these benign epithelial tumors, which have a fibrous capsule formed by islands and epithelial cords that mimic the dental lamina, invade neighboring tissues and release mediators (IL-1, EGF) of tooth and root resorption. This hypothesis may be one more explanation for the tooth resorptions sometimes found in orthodontic records, and may help differentiate the root resorptions that are specific to the orthodontic practice.
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Bjerklin, Krister, and Chanelle Houmet Guitirokh. "Maxillary incisor root resorption induced by ectopic canines." Angle Orthodontist 81, no. 5 (April 4, 2011): 800–806. http://dx.doi.org/10.2319/011311-23.1.
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Abstract Objective: To evaluate the long-term clinical and radiographic effects of maxillary incisor root resorption in cases of ectopic canines treated during the late 1970s and 1980s in Jönköping, Sweden. Subjects and Methods: The material comprised 55 incisors in 38 subjects. The posttreatment follow-up time was 13 to 28 years. All subjects underwent intraoral radiography, 33 were referred for computed tomography or cone beam computed tomography, and 24 also underwent clinical examination. The severity of incisor root resorption was correlated with clinical characteristics. Radiographs of the resorptive lesions were documented in detail and compared with intraoral radiographs taken immediately posttreatment. Results: Four incisors in three subjects had been lost, in part because of root resorption. Of the 36 incisors with root resorption, the lesions were unchanged in 26 teeth, improved in three teeth, and exacerbated in seven. In one case the resorption had progressed to pulpal exposure, necessitating endodontic treatment. For most of the incisors, the periodontal ligament was more clearly defined and the lamina dura showed improved trabeculation. The clinical characteristics of the incisors with resorption were not significantly different from those of sound incisors. Conclusions: In this long-term follow-up, most cases of incisor root resorption induced by ectopic maxillary canines did not progress and teeth with root resorption showed no clinically relevant symptoms. The prognosis for long-term survival of teeth with resorbed roots is good, but in cases where extraction is indicated, lateral incisors with severe root resorption should be extracted in favor of healthy premolars.
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Consolaro, Alberto, and Graziella Bittencourt. "Why not to treat the tooth canal to solve external root resorptions? Here are the principles!" Dental Press Journal of Orthodontics 21, no. 6 (December 2016): 20–25. http://dx.doi.org/10.1590/2177-6709.21.6.020-025.oin.
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ABSTRACT This paper aims at exposing the foundations or reasons why, in cases of external tooth resorption, including those of orthodontic origin, one should not perform a root canal to treat it. That should be done only to teeth with contamination or pulp necrosis, to remove the periapical inflammation induced by microbial products. When facing cases of external tooth resorption, one's conduct must always respect the following sequence of steps: first of all, identifying the cause accurately; then, planning the therapeutic approach and, finally, adopting the conducts in a very well-founded way. The situations in which endodontic treatment is recommended for tooth resorptions are those when there are: a) pulp necrosis with microbial contamination, b) aseptic pulp necrosis, c) developing calcific metamorphosis of the pulp and d) diagnosis of internal resorption. It is not possible, through the pulp, to control the resorption process that is taking place in the external part, after all, the causes are acting in the periodontal ligament. There is no evidence that justifies applying endodontic treatment, by means of root canal, to control external resorption processes, when the pulp shows vitality.
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Ioana, Suciu, B. Dimitriu, C. Varlan, Cotrut Dana, Cristea Diana, Mitran Loredana, M. Mitran, Gheorghiu Irina-Maria, and D. M. Iliescu. "Internal granuloma with perforation – 2 case report." ARS Medica Tomitana 21, no. 4 (November 1, 2015): 196–200. http://dx.doi.org/10.1515/arsm-2015-0045.
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Abstract Internal resorption was associated with long-term chronic inflammation of the pulp (chronic granulomatous pulpitis). When internal resorption is radiographically confirmed, endodontic treatment becomes a necessity. Vital teeth internal resorption appears radiographically as an oval enlargement of the pulp chamber and root canal with smooth, symmetrical outline. Internal granuloma is assumed to be an effect of the trauma, or pulp inflammation, the ailment is rare, asymptomatic and might progress rapidly, causing perforation. It is difficult to remove the pulp tissue from the resorptive defect, since this area is not easily accessible for instrumentation. The delay of the endodontic treatment may lead the internal resorption to perforation, thus decreasing the chances of treatment success. In the following paper, we present a total of two clinical cases with internal granuloma with perforation that have benefited of specific endodontic treatment.
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Ikhar, Anuja, Nikita Thakur, Aditya Patel, Rohan Bhede, Pranav Patil, and Surbhi Gupta. "Management of External Invasive Cervical Resorption Tooth with Mineral Trioxide Aggregate: A Case Report." Case Reports in Medicine 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/139801.
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Invasive cervical resorption is entirely uncommon entities and the etiology is poorly understood. A 19 year old patient presented with fractured upper left central incisor and sinus tract opening on the distobuccal aspect in cervical region. Radiographic examination shows irregular radiolucency over the coronal one-third and it extended externally towards the external invasive resorption. After sectional obturation, the defect was accessed surgically. The resorption area was chemomechanically debrided using irrigant solution. Fibre post placement using flowable composite resin and Mineral Trioxide Aggregate (MTA) was used to fill the resorptive defect, and the coronal access was temporarily sealed. Composite restoration was subsequently replaced with ceramic crown after 4 years. Radiographs at 1 and 4 years showed adequate repair of the resorption and endodontic success. Clinically and radiographically the tooth was asymptomatic, and no periodontal pocket was found after a 4-year followup.
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Sathyanarayanan, Kothandaraman, Lingeswaran Poornima, and Keerthi V. Narayan. "Non-Surgical Endodontic Management of External Root Resorption in a Permanent Maxillary Central Incisor Tooth - A 3 Year Follow-Up of a Rare Case Scenario." Journal of Evolution of Medical and Dental Sciences 10, no. 30 (July 26, 2021): 2350–53. http://dx.doi.org/10.14260/jemds/2021/481.
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Resorption of the tooth represents a multifactorial and a perplexing problem for all clinicians resulting in complete or partial loss of tooth structure. The present clinical demonstration describes management of the permanent maxillary left central incisor (tooth number #21) affected by external root resorption involving the mesial and distal surface of middle one-third of the root. Conventional nonsurgical endodontic treatment followed by MTA (Mineral trioxide aggregate) obturation (PRoRoot MTA, Dentsply, Tulsa Dental Specialties) was planned. The root canal of the affected teeth was debrided with Dual Rinse HEDP (Medcem Weinfelden, Switzerland) containing etidronate powder and chemomechanical preparation of the root canal was performed with XP endo shaper file system (FKG Dentaire, SA, Switzerland). Thirtysix months’ post-operative follow-up revealed complete healing of the external root resorption defect with no clinical and radiological signs and symptoms. In the present case simple non-surgical endodontic management of severe external root resorption was done in a permanent maxillary tooth by using a continuous chelation irrigation technique, intracanal medicament followed by obturation with bio-ceramic material produced satisfactory results in contrast to the recommended surgical management. Resorption of the tooth being a multifactorial and a perplexing problem for all clinicians results in complete or partial loss of tooth structure. According to the Glossary of Endodontic terms, Resorption is defined as a condition associated with either a physiologic or a pathologic process resulting in the loss of dentine, cementum, and/or bone.1 Traditionally resorption can present either as internal or as external resorption.2 External root resorption occurs on the outer surface of the root and are of dissimilar nature such as external surface resorption, external inflammatory root resorption, ankylosis, and external replacement resorption, the most common being external inflammatory root resorption.3 According to the Glossary of Endodontics, “Inflammatory resorption is defined as an internal or external pathologic loss of tooth structure and possibly bone, resulting in a defect; occurs as the result of microbial infection; characterized radiographically by radiolucent areas along the root”.1 It may result due to dental trauma, forceful orthodontic tooth movement, long standing infection of the pulp or periodontal tissues. External resorption presents as a major resorptive condition of the root without any clinical signs and symptoms.2 The non-surgical management of external inflammatory root resorption is based on its aetiology, which needs to be eliminated
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de Carvalho Coutinho, Thais Machado, Carollyne Souza Campello, Juliana Pires Abdelnur, Vivian Ronquete, Carlos Henrique Sardenberg Pereira, and Marilia F. Marceliano-Alves. "Maxillary anterior teeth with extensive root resorption treated with multidisciplinary approach: A case report." International Journal of Case Reports and Images 14, no. 1 (January 12, 2023): 8–13. http://dx.doi.org/10.5348/101373z01tc2023cr.
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Invasive cervical resorption is a type of external resorption, which is generally located in the cervical region of the tooth. The resorptive process can be caused by physiological, pathological, hormonal, and trauma factors. The present study aimed to report a case of invasive cervical resorption in tooth 12 identified as an incidental finding, in which all available clinical resources were used, as well as a combined multidisciplinary treatment of endodontics, orthodontics, surgery, and prosthesis. At the initial consultation, the tooth presented with Heithersay’s class II resorption, undergoing endodontic treatment and traction for subsequent cavity sealing. After completion of orthodontics, an increase in the resorptive pocket was observed (Class III of Heithersay), which led to endodontic retreatment and subsequent surgical intervention to remove the granulation tissue and fill it with bioceramic material. The preparation of the coronal remnant and fabrication of a prosthetic restoration were performed, with the aim of shielding the endodontic cavity and functionally restoring the tooth. With the case presented, it was possible to conclude that incidental findings are part of the endodontist’s daily life, requiring a constant search both for early diagnosis and effective multidisciplinary treatment, which contributes to the restoration of aesthetics and function, contributing to the tooth longevity.
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Borggaard, Xenia G., Dinisha C. Pirapaharan, Jean-Marie Delaissé, and Kent Søe. "Osteoclasts’ Ability to Generate Trenches Rather Than Pits Depends on High Levels of Active Cathepsin K and Efficient Clearance of Resorption Products." International Journal of Molecular Sciences 21, no. 16 (August 18, 2020): 5924. http://dx.doi.org/10.3390/ijms21165924.
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Until recently, it was well-accepted that osteoclasts resorb bone according to the resorption cycle model. This model is based on the assumption that osteoclasts are immobile during bone erosion, allowing the actin ring to be firmly attached and thereby provide an effective seal encircling the resorptive compartment. However, through time-lapse, it was recently documented that osteoclasts making elongated resorption cavities and trenches move across the bone surface while efficiently resorbing bone. However, it was also shown that osteoclasts making rounded cavities and pits indeed resorb bone while they are immobile. Only little is known about what distinguishes these two different resorption modes. This is of both basic and clinical interest because these resorption modes are differently sensitive to drugs and are affected by the gender as well as age of the donor. In the present manuscript we show that: 1. levels of active cathepsin K determine the switch from pit to trench mode; 2. pit and trench mode depend on clathrin-mediated endocytosis; and 3. a mechanism integrating release of resorption products and membrane/integrin recycling is required for prolongation of trench mode. Our study therefore contributes to an improved understanding of the molecular and cellular determinants for the two osteoclastic bone resorption modes.
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Valchuk, S. N., D. E. Alekseev, G. V. Gavrilov, A. V. Stanishevskiy, and D. V. Svistov. "Circulation and resorption of cerebrospinal fluid: historic and up-to-date presentation." Bulletin of the Russian Military Medical Academy 20, no. 2 (December 15, 2018): 215–20. http://dx.doi.org/10.17816/brmma12336.
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It is analyzed historical development and current apprehension about cerebrospinal fluid. We are interested in all about liquor however the huge our attention concentrates on resorption of fluid. It is caused by many cases with expiration of liquor after operation but there isn’t answer about arrangement of this complication. It is notably but now the question about resorption of cerebrospinal fluid is still controversial. The part of scientists stands by classic speculation. They think that resorption of liquor arises by Pachioni’s granulations. Another part keeps to theory that the main role performs glymphatic system by the resorption of liquor. That’s why we make a decision that we need to make an investigation of nowadays literature about dynamic of cerebrospinal fluid and resorption of liquor.We think after neurosurgical operations cerebrospinal fluid’s resorpting ability decreases. We make these conclusion, because there are lots of science experiments. These experiments simulate real surgical procedures. That’s why intracranial pressure raises and then liquor runs out. We made a conclusion lots of scientists adhere to mind that after neurosurgical operations resorption of liquor decreases that’s why it starts hyporesorption. However even presently this problem is actually. There is a little bit experiments but there isn’t any clinical research.
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Datta, Harish K., Iain MacIntyre, and Mone Zaidi. "The effect of extracellular calcium elevation on morphology and function of isolated rat osteoclasts." Bioscience Reports 9, no. 6 (December 1, 1989): 747–51. http://dx.doi.org/10.1007/bf01114813.
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Osteoclasts are large multinucleate cells unique in their capacity to resorb bone. These cells are exposed locally to high levels of ionised calcium during the process of resorption. We have therefore examined the effect of elevated extracellular calcium on the morphology and function of freshly disaggregated rat osteoclasts. Cell size and motility were quantitated by time-lapse video recording together with digitisation and computer-centred image analysis. In order to assess the resorptive capacity of isolated osteoclasts, we measured the total area of resorption of devitalised cortical bone by means of scanning electron microscopy and computer-based morphometry. The results show that elevation of the extracellular calcium concentration causes a dramatic reduction of cell size, accompanied by a marked diminution of enzyme release and abolition of bone resorption. We propose that ionised calcium might play an important role in the local regulation of osteoclastic bone resorption.
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Epistatu, Dragos, Andreea Ciolacu, Aikaterina Kitsou, Ioanina Părlătescu, Octavian Dincă, Cristian Vlădan, Florin Dogioiu, Valentin Varlas, and Paula Perlea. "A radiological study method of vertical alveolar resorptions using immediate dental implants." Romanian Journal of Stomatology 67, no. 3 (September 30, 2021): 177–82. http://dx.doi.org/10.37897/rjs.2021.3.8.
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Dental extraction is followed by decreases in alveolar volume, vertically and horizontally. This retrospective study measured vertical alveolar resorption after insertion of immediate implants, using OPG, without CBCT or additional radiographs. Patients were randomly split in two groups A (57 implants) and B (47 implants). Measurements were made by two independent observers. The types of implants were: Exacta (Biaggini Medical Devices), Nova, Dentix Millenium and Surcam. The method was based on the size of the implant and another common element of the two radiographs. It used an optimal radiologic exposure. It can be generalized to other studies. Similar results measured in the two groups showed that alveolar remodeling does not depend on the type of the implant. Half of the alveoli did not have any resorption. Another quarter showed barely perceptible clinical resorption (1-2 mm). In the last quarter were registered all the notable resorptions that were associated with various factors (temporary mobile prosthesis, surgical flap, medication and some health problems, smoking, etc.) showing real situations, not ideal conditions. Maximum resorption was unique (7.63 mm).
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Consolaro, Alberto, and Débora de Almeida Bianco. "Tooth resorptions are not hereditary." Dental Press Journal of Orthodontics 22, no. 4 (August 2017): 22–27. http://dx.doi.org/10.1590/2177-6709.22.4.022-027.oin.
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ABSTRACT Root resorptions caused by orthodontic movement are not supported by consistent scientific evidence that correlate them with heredity, individual predisposition and genetic or familial susceptibility. Current studies are undermined by methodological and interpretative errors, especially regarding the diagnosis and measurements of root resorption from orthopantomographs and cephalograms. Samples are heterogeneous insofar as they comprise different clinical operators, varied types of planning, and in insufficient number, in view of the prevalence of tooth resorptions in the population. Nearly all biological events are coded and managed through genes, but this does not mean tooth resorptions are inherited, which can be demonstrated in heredograms and other methods of family studies. In orthodontic root resorption, one cannot possibly determine percentages of how much would be due to heredity or genetics, environmental factors and unknown factors. There is no need to lay the blame of tooth resorptions on events taking place outside the orthodontic realm since in the vast majority of cases, resorptions are not iatrogenic. In orthodontic practice, when all teeth are analyzed and planned using periapical radiography or computerized tomography, and when considering all predictive factors, tooth resorptions are not iatrogenic in nature and should be considered as one of the clinical events inherent in the treatment applied.
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Falahat, Babak, Sune Ericson, Rozmary Mak D'Amico, and Krister Bjerklin. "Incisor Root Resorption Due to Ectopic Maxillary Canines." Angle Orthodontist 78, no. 5 (September 1, 2008): 778–85. http://dx.doi.org/10.2319/071007-320.1.
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Abstract Objective: To document the long-term fate of maxillary incisors with resorbed roots after correction of the associated ectopic canines. Materials and Methods: The subjects were recruited from 107 children and adolescents age 9–15 years (mean 12.5 years) at initial registration, with 156 ectopically positioned maxillary canines. The children were referred to the specialist orthodontic clinic for consultation because of the risk of incisor root resorption. Of 51 patients contacted, 16 failed to attend. Eight of the remaining 35 were excluded because their lateral incisors had been extracted, leaving 27 subjects for follow-up registration. At initial consultation, all subjects had undergone radiographic examination, including computed tomography (CT) scans. At the follow-up consultation, the radiographic examination was limited to intraoral films. Results: No resorbed incisor was lost during the 2- to 10-year follow-up period. The resorptive lesions had undergone repair in 13 teeth, remained unchanged in 12 teeth and progressed in 7 teeth. In the 13 teeth exhibiting signs of repair, no resorption was detectable in 11 teeth and minor resorption was detected in 2 lateral incisors. At the initial registration, severe or moderate resorption had been diagnosed in 12 lateral and 5 central incisors, compared with 11 lateral and 6 central incisors at follow-up. In 10 subjects initially diagnosed with resorption of 13 incisors, the lesions were no longer discernible on intraoral radiographs at follow-up. Conclusions: Even in cases of severe resorption, the incisor roots show good long-term healing. Incisors with root resorption can be used in an orthodontic appliance system.
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Roux, P., M. Berger, M. Stoffel, H. Stich, M. G. Doherr, D. Bosshard, and P. Schawalder. "Observations of the Periodontal Ligament and Cementum in Cats with Dental Resorptive Lesions." Journal of Veterinary Dentistry 22, no. 2 (June 2005): 74–85. http://dx.doi.org/10.1177/089875640502200201.
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The etiology of feline dental resorptive lesions is unknown, but some evidence suggests that interactions between components of the periodontium may be initiating factors in the development of these lesions. In the present study, 22 clinically normal teeth were harvested from 7 cats. The teeth and periodontium were radiographed and examined histologically. In addition, 14 of the 22 teeth were examined histometrically. Two teeth were histologically normal with an open apical foramen and two were normal with a closed apical foramen. Histological evidence of periodontal ligament degeneration without cementum resorption was observed in 8 teeth, and varying degrees of cementum resorption were observed in 10 teeth. Mandibular molar and premolar teeth had distal drift, and mandibular canine teeth had mesial drift. Alterations in the periodontal ligament may represent a preclinical stage of dental resorption.
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Shoba, K., R. Abhilash, Jithin Balan, and MR Sreelakshmi. "External Inflammatory Root Resorption: Management of a Tooth with hopeless Prognosis." Conservative Dentistry and Endodontic Journal 2, no. 1 (2017): 24–27. http://dx.doi.org/10.5005/jp-journals-10048-0020.
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ABSTRACT The treatment of external root resorption and associated periodontal defect can be challenging to the most ingenious clinician. A correct diagnosis and an understanding of the etiology and dynamics of root resorption, which is the progressive loss of dentin and cementum through action of osteoclastic cells, are critical for effective management. The article describes the management of an external root resorption in maxillary central incisor where a combined endo-perio management strategy was implemented. Cone beam computed tomography was used as an adjunctive diagnostic aid. A combined approach using biodentine for root surface repair, bone graft, collagen membrane, and platelet-rich fibrin to address the associated osseous lesion appears to be viable modality in treatment of the same. After a follow-up period of 12 months, the patient was found to be asymptomatic. Postoperative radiographs also demonstrated satisfactory bone fill and arrest of the resorptive lesion. How to cite this article Abhilash R, Balan J, Shoba K, Sreelakshmi MR. External Inflammatory Root Resorption: Management of a Tooth with hopeless Prognosis. Cons Dent Endod J 2017;2(1):24-27.
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Rafflenbeul, Frédéric, Catherine-Isabelle Gros, François Lefebvre, Sophie Bahi-Gross, Raphaëlle Maizeray, and Yves Bolender. "Prevalence and risk factors of root resorption of adjacent teeth in maxillary canine impaction, among untreated children and adolescents." European Journal of Orthodontics 41, no. 5 (December 7, 2018): 447–53. http://dx.doi.org/10.1093/ejo/cjy078.
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Summary Objectives The aim of this retrospective study was to assess in maxillary canine impaction cases both the prevalence of root resorption of adjacent teeth among untreated children and adolescents, and its associated risk factors. Subjects and methods Sixty subjects (mean age 12.2 years; SD 1.9; range 8–17 years) with 83 displaced maxillary canines and without any past or ongoing orthodontic treatment were included in this study. The presence of root resorption was evaluated on images from a single cone beam computed tomography (CBCT) unit. Potential risk factors were measured on the CBCT images and on panoramic reconstructions of the 3D data sets. The sample was characterized by descriptive statistics and multiple logistic regressions were performed to predict root resorption. Results Root resorption of at least one adjacent tooth was detected in 67.5 per cent of the affected quadrants. It was found that 55.7 per cent of the lateral incisors, 8.4 per cent of the central incisors, and 19.5 per cent of first premolars were resorbed. Of the detected resorptions, 71.7 per cent were considered slight, 14.9 per cent moderate, and 13.4 per cent severe. Contact between the displaced canine(s) and the adjacent teeth roots was the only identified statistically significant risk factor, all teeth being considered (odds ratio [OR] = 18.7, 95% confidence interval: 2.26–756, P < 0.01). An enlarged canine dental follicle, a peg upper lateral, or an upper lateral agenesis were not significantly associated with root resorption of adjacent teeth, nor were age nor gender. Conclusions Root resorption of adjacent teeth was detected in more than two-thirds of a sample of sixty untreated children and adolescents.
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Jerin, Jose, Karine Shoba, Tomy Nithya, P. Sheena, and Aman Shibu. "Management of invasive cervical resorption with biodentine: a case report." Journal of Research in Dentistry 3, no. 2 (October 13, 2015): 660. http://dx.doi.org/10.19177/jrd.v3e22015660-666.
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Invasive cervical resorption is entirely an uncommon entity in dental community that is not well understood. Accurate diagnosis of the situation and immediate treatment execution are prerequisites for long term retention of the tooth. Treatment procedure includes elimination of the resorptive tissue followed by restoring the defect with a suitable biocompatible material. The necessity of endodontic treatment depends on whether the defect had invaded the root canal or not. This case report elaborates the surgical management of a class IV invasive cervical resorption in the central incisor followed by restoration of the defect with biodentine.
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Rautava, Jaana, Tero Soukka, Esko Peltonen, Petri Nurmenniemi, Markku Kallajoki, and Stina Syrjänen. "Unusual Case of Inflammatory Myofibroblastic Tumor in Maxilla." Case Reports in Dentistry 2013 (2013): 1–4. http://dx.doi.org/10.1155/2013/876503.
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Inflammatory myofibroblastic tumor (IMT) is a rare lesion found mostly in children and young adults and originates from the lung, abdominopelvic region, and retroperitoneum. Clinical manifestations of IMT or imaging are nonspecific and diagnosis is based on histopathological and immunohistochemical findings. Minority of all IMTs will metastasize. IMT in the oral cavity is an extreme rarity and this is a first case report of IMT in maxilla causing delayed tooth eruption and multiple cervical root resorption with an 11-year-old child. The IMT reported here was positive for smooth muscle actin, vimentin, and anaplastic lymphoma kinase (ALK1) with immunohistochemistry. Only three IMTs of the jaws have been reported so far and none of them had delayed root eruption and tooth resorption. This unusual case of IMT in a child was also ALK1- positive supporting neoplastic origin of her tumor. The case presented here underscores the importance of histopathological examination of the tissue found in any root resorption especially in the case of multiple resorptions.
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Nilsson, Elisabeth, Eric Bonte, François Bayet, and Jean-Jacques Lasfargues. "Management of Internal Root Resorption on Permanent Teeth." International Journal of Dentistry 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/929486.
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Internal root resorption (IRR) is a particular category of pulp disease characterized by the loss of dentine as a result of the action of clastic cells stimulated by pulpal inflammation. This review article explains the etiology, the prevalence of IRR, and, in addition to the clinical data, the contribution of the three-dimensional imaging (CBCT) to the diagnosis, the clinical decision, and the therapeutic management of IRR. The authors discussed the various therapeutic options including the orthograde or retrograde fillings of the root canal resorption area. Root canal treatment remains the treatment of choice of internal root resorption as it removes the granulation tissue and blood supply of the clastic cells. The authors describe with different clinical cases the modern endodontic techniques including optical aids, ultrasonic improvement of chemical debridement, and the use of alternative materials such as calcium silicate combined with thermoplastic filling (warm gutta-percha). In these conditions, the prognosis of the conservative treatment of internal resorptions, even if root walls are perforated, is good.
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Opacic-Galic, Vanja, Djordje Veljovic, Jelena Neskovic, Vesna Milosevic, and Veljko Ilic. "Efficiency of calcium hydroxide removal techniques from simulated internal resorptions - in vitro study." Srpski arhiv za celokupno lekarstvo 149, no. 7-8 (2021): 402–8. http://dx.doi.org/10.2298/sarh200714029o.
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Introduction/Objective. Calcium hydroxide (CH) is the medicament of choice in endodontic treatment of internal root resorptions. The aim of the study was to compare the effectiveness of three different techniques for CH removal from simulated internal root resorptions. Methods. Twenty-nine extracted single-root teeth were prepared using NiTi rotary files of BioRaCe system (40/.04) following irrigation. A round diamond drill was used in the making of a symmetrical standardized internal resorptions 6 mm from the apex. Three techniques for CH removal from internal resorptions were tested: modified conventional syringe irrigation (CSI), passive ultrasonic irrigation (PUI), XP-endo Finisher (XP). Resorptive cavities and apical thirds were observed under a stereomicroscope (?45) and scored (from 1 to 5), while representative samples were analysed by a scanning electron microscope. Obtained results were statistically processed by Kruskal?Wallis and Mann?Whitney U-test (p < 0.05). Results. The most efficient system was PUI, with 66.7% of samples rated 1 and 33.3% rated 2. The next one was XP, and the least efficient was CSI, with 33.3% of samples rated 1 (resorptive defect without medicament). There was a statistically significant difference between the PUI and CSI systems (p < 0.05), while there was no difference between the PUI and XP systems. Conclusion. No system completely removed the CH from the simulated internal root resorption cavities. PUI was the most effective system for removing CH. The combination of techniques provides better performance in removing CH paste residues from the canal walls
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Bakland, Leif K. "ROOT RESORPTION." Dental Clinics of North America 36, no. 2 (April 1992): 491–507. http://dx.doi.org/10.1016/s0011-8532(22)02509-5.
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Martin, A. P., and Barry Feiglin. "ROOT RESORPTION." Australian Dental Journal 31, no. 3 (June 1986): 230–31. http://dx.doi.org/10.1111/j.1834-7819.1986.tb01211.x.
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Feiglin, Barry. "Root Resorption." Australian Dental Journal 31, no. 1 (February 1986): 12–22. http://dx.doi.org/10.1111/j.1834-7819.1986.tb02978.x.
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Feiglin, Barry. "ROOT RESORPTION." Australian Dental Journal 32, no. 3 (June 1987): 227–28. http://dx.doi.org/10.1111/j.1834-7819.1987.tb01863.x.
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