1/4. Moving an ankylosed central incisor using orthodontics, surgery and distraction osteogenesis.When a dentist replants an avulsed tooth, the repair process sometimes results in the cementum of the root and the alveolar bone fusing together, with the replanted tooth becoming ankylosed. When this occurs, the usual process of tooth movement with bone deposition and bone resorption at the periodontium cannot function. If dental ankylosis occurs in the maxillary incisor of a growing child, the ankylosed tooth also cannot move vertically with the subsequent vertical growth of the alveolar process. This results in the ankylosed tooth leaving the plane of occlusion and often becoming esthetically objectionable. This report describes a 12-year-old female with a central incisor that was replanted 5 years earlier, became ankylosed, and left the occlusal plane following subsequent normal vertical growth of the alveolar process. When growth was judged near completion, the tooth was moved back to the occlusal plane using a combination of orthodontics, surgical block osteotomy, and distraction osteogenesis to reposition the tooth at the proper vertical position in the arch. This approach had the advantage of bringing both the incisal edge and the gingival margin of the clinical crown to the proper height in the arch relative to their antimeres. Previous treatment procedures for ankylosed teeth have often involved the extraction of the affected tooth. When this is done, a vertical defect in the alveolar process results that often requires additional bone surgery to reconstruct the vertical height of the alveolar process. If the tooth is then replaced, the replacement tooth must reach from the final occlusal plane to the deficient ridge. This results in an excessively long clinical crown with a gingival height that does not match the adjacent teeth.- - - - - - - - - - ranking = 1keywords = extraction (Clic here for more details about this article) |
2/4. Management of occlusal and developmental disturbances resulting from an ankylosed maxillary second primary molar: case report.This case report presented the orthodontic management of an ankylosed primary molar. Trauma to the maxillary right second primary molar resulted in the infraocclusion of the affected tooth as well as the mesial tipping of the adjacent first permanent molar and displacement of the permanent successor. After extraction of the ankylosed primary molar, orthodontic therapy was performed to upright the adjacent permanent molar and to gain the lost space of its permanent successor. By the application of orthodontic mechanics, the maxillary right permanent first molar was uprighted and the maxillary right permanent second premolar was brought to its proper position.- - - - - - - - - - ranking = 1keywords = extraction (Clic here for more details about this article) |
3/4. Case report: severe infraocclusion ankylosis occurring in siblings.AIM: This was to report a rare case of strong familiar tendency of ankylosis of maxillary second primary molars. CASE REPORT: Three Caucasian children, male twins of 8.5 years and a sister of 10 years, were diagnosed as having severely infraccluded maxillary second primary molars with underlying second premolars. In all three cases, the early extraction of the infraoccluded molars and an active treatment with cervical extraoral traction allowed the physiologic eruption of second premolars. Follow-up showed that normal vertical relationship and bone height had been obtained. CONCLUSION: early diagnosis, as well as appropriate treatment and careful follow-up are very important in the presence of severe infraocclusion, when the marginal ridge of affected primary teeth is at or below gingival level.- - - - - - - - - - ranking = 1keywords = extraction (Clic here for more details about this article) |
4/4. Two patterns of histologic healing in an intrabony defect following treatment with enamel matrix derivative: a human case report.Human histologic evidence of periodontal regeneration following treatment of intrabony defects with enamel matrix derivative has yielded inconsistent results in recent case reports. A 46-year-old woman presenting one deep intrabony defect at the distal root of a mandibular first molar scheduled for extraction was selected for enamel matrix derivative therapy. During surgery, a notch was placed at the most apical level of calculus on the experimental root. Nine months postsurgery, a block section including the distal root and surrounding periodontal tissues was obtained and processed in a mesiodistal plane. Histologic analysis demonstrated two different patterns of healing along the proximal and furcal surfaces. regeneration with new cellular cementum, bone, and periodontal ligament with functional fiber orientation was observed on the distal aspect of the root, whereas the furcal surface healed through ankylosis. This report underlines the biologic variability in wound healing following enamel matrix derivative therapy in periodontal intrabony defects and within the same defect. Host-specific intrinsic and/or extrinsic factors accounting for this variability remain to be investigated.- - - - - - - - - - ranking = 1keywords = extraction (Clic here for more details about this article) |