| dc.description.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. | |
