Effect of orthodontic treatment on root shape in endodontically treated teeth

Abstract

Objective To evaluate the clinical characters of root shape after orthodontic treatment among endodontically treated teeth.Methods Forty-five orthodontic patients were selected who had a tooth treated endodontically before initiation of the orthodontic movement The panoramic radiographs before and after orthodontic treatment were examined.Measurements were made by comparing the root resorption score taken before and after the orthodontic treatment Results ① There was great statistically significant difference (P < 0.001) in apical root resorption after orthodontic treatment in the endodontically treated teeth compared to before initiation of orthodontic movement.② A positive association between apical root resorption and gender was observed in the patients with endodontically treated teeth and female was more dangerous when exposed to orthodontic loading.③ There was no statistically difference in apical root resorption between endodontically treated teeth and natrual teeth.④ No root resorption score up to third degree was observed in selected cases.Conclusions After orthodontic treatment root resorption was common both in endodontically treated teeth and natural teeth, There was no significant difference between them. Key words: Root canal treatment;  Orthodontic treatment;  Apical root resorption