Reabsorción radicular externa apical en incisivos y caninos superiores e inferiores sometidos a tratamiento de Ortodoncia en etapa inicial

Abstract

The external apical root resorption (EARR) is a common inflammatory process associated with orthodontic treatment. The aim of this study was to compare the magnitude of EARR in upper and lower incisors and canines in patients undergoing the initial phase of orthodontic treatment with three different kinds of brackets. The sample consisted of 23 patients aged 12 to 27 years, randomly divided into 3 groups. Group I (n=9; 5 women, 4 men), using passive self-ligating brackets Damon Q. Group II (n=8; 4 women, 4 men) using conventional brackets prescription Roth and MBT. Group III (n=6; 4 women, 2 men) using QR Biofunctional brackets. 264 teeth (maxillary and mandibular canines and incisors) were analyzed using cone-beam computed tomography (NewTom VGi Cone Beam 3D Imaging), with NNT Viewer scanner (version 4.6 NewTom). The results indicate the average resorption showed different for distinct treatment protocols, well as different according to the teeth analyzed, however with ANOVA test statistically significant difference was not found comparing the average reabsorption of each piece by type of brackets employees or performed treatment (p> 0.05). when comparing the mean reuptake each piece type brackets employees or treatment performed (p> 0.05). This study concludes the EARR has occurred in all teeth evaluated during the first 6 months of treatment, and bracket design (passive self-ligating, conventional or QR) doesn´t influence the degree of root resorption.