Detecção da Reabsorção Radicular Apical após Tratamento Ortodôntico, em Longo Prazo, Utilizando Radiografia Periapical e Tomografia Computadorizada de Feixe Cônico

• Main Author: FREITAS, Jairo Curado de
• Publication Date: 2011
• Format: Doctoral thesis
• Language: por
• Source: Repositório Institucional da UFG
• dARK ID: ark:/38995/00130000019rh
• Download full: http://repositorio.bc.ufg.br/tede/handle/tde/1517
• topic: reabsorção radicular, tomografia computadorizada de feixe cônico, tratamento ortodôntico.; root resorption; cone-beam computed tomography; orthodontic treatment; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA

Aim: To detect Apical Root Resorption (ARR) after orthodontic treatment at 52-288 months using periapical radiography (PR) and cone beam computed tomography (CBCT). Methods: Radiographic images obtained from 58 patients, before (T1) and after orthodontic treatment (T2), and following 52-288 months of treatment were analized by three members of the Brazilian Board of Orthodontics. Apical structures were evaluated by PR images (T2 and T3), using Levander and Malmgren2 scores. The presence of ARR on CBCT images were detected only at T3. The Kolmogorov-Smirnov test was used for statistical analyses, and the level of significance was set at 5%. Kappa statistics determined interobserver agreement. Results: ARR more frequent were with scores 1 in T2 (51.6%) and T3 (53.1%), when evaluated by PR (p>0.05). When compared the frequencies of ARR in T3 among PR and CBCT images, the differences were significant for maxillary and mandibular pre-molar groups, and for mandibular molar group (p>0.05). The teeth with highest frequency of ARR presence using CBCT images were maxillary lateral incisors (94.5%) and mandibular central incisors (87.7%), while the bicuspids showed the lowest frequency. The CBCT images showed that the teeth involved in orthodontic treatment with extraction present higher ARR frequency (p<0.05). Conclusion: PR images suggested higher frequency of ARR compared with CBCT images for maxillary and mandibular pre-molar groups, and for mandibular molar group ARR did not change in long term. CBCT is a promising imaging method to be used in the diagnosis of ARR.