Clinical assesment of debonded brackets numbers after rebonding with different ARI

Abstract

Bracket debonding is one of the most common complications in orthodontics.Rebonding these brackets require clinical chair time and is a nuisance as well as a costly process in the course of orthodontic treatment . The aim of the present study was to compare the clinical survival of rebonded brackets with different Adhesive Remnant Index (ARI) scores with new brackets' rebonding. Materials and Methods: The subjects of the present study consisted of 76 debonded brackets of maxillary first and second premolars. These brackets were assigned in two groups: according to ARI scoring after debonding A (ARI4)with 27 brackets and B (ARI2) with 28 brackets. In 21 cases, new brackets were used (group C). After rebonding, the frequencies of the debonding in each rebonded group during 3 intervals of treatment (less than6 months,6-12 months,12-18 months) were analysed and compared in groups using Chi-squared and mantel- cox tests. Results: During less than 6 months, the frequency of debonded brackets was significantly (p<0.05) higher in group B (ARI2) than those of groups A (ARI4) and C (new brackets). The number of debonded brackets were not significantly(p>0.05) different between groups A(ARI4) and C(new brackets) . Conclusion: Clinical survival of rebounded brackets with bonding failure between adhesive and enamel (ARI4) could be clinically comparable with new brackets.