Management of periapical rarefaction in non-vital permanent anterior tooth with Ca(OH)2 root canal dressing.
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This research shows the relationship between orthodontic treatment and apical root resorption. The latest edgewise appliance with a pre-adjusted bracket (Alexander method) was used in the present experimentation. Examination by roentgen cephalometry and intraoral radiography was performed before and after the maxillary central incisors had been moved orthodontically. The conclusion is that there was no significant difference among the grade 0, 1, 2 and 3 of apical root resorption in the change of long axis inclination of the maxillary central incisors. But there was a significant difference among the grade 0, 1, 2 and 3 of root resorption in the distance of the apical root movement. The most apical root resorption was observed when the apical root was moved lingually.
The forensic dentist can estimate the age of an individual by observing the developing dentition. Systematic observations can provide accurate age estimations depending of the criteria used and the experience and training of the dentist. Anatomical, histological, and radiographic examinations of the teeth are of great value. Admittedly, some of the aforementioned methods are complicated and require prolonged time periods to perform. Alternative methods of age estimation may be required when rapid results are demanded by the police or other agencies. It is, however, the obligation of the forensic dentist to provide the precise age data. Therefore, all available resource materials must carefully evaluated, including the possible factors that may cause variations. Only after data is carefully evaluated can the error in age estimations be reduced.
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The present study deals with a study of the tooth mobility, the pocket depth and the bone destruction in 616 periodontally healthy subjects. It was found that the mobility of the upper lateral incisor is inferior to that of the central one. Furthermore, relations of age to tooth mobility and bone destruction were established, whereas no relationship between age and pocket depth was evident.
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Although more common in recent years, inter-radicular osteotomies remain operations which pose the problem of the prognosis of the displaced teeth. In the light of one special case, the authors sought to assess these risks, in relation to the functional and aesthetic benefits of the surgical procedure.
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