Abstract
Aim: The purpose of this study is to compare the survival rate of orthodontic brackets using two different bonding techniques. Materials and Methods: Twenty patients requiring fixed orthodontic treatment were selected according to the inclusion and exclusion criteria after obtaining informed consent. Result: Twenty patients were selected with the mean age group of 17.5 ±5 years. A total of 360 brackets were bonded (180 brackets in each bonding technique) and were evaluated for survival rate for six months. The direct bonded bracket failure was only 6 out of 180 sample size and for the indirect bonded group was 8 out of 180. The total breakages were 14 including both the groups. The direct bonding group had 95.6% of survival rate which was lower when compared to 96.7% that of direct bonding group. The two bonding groups did not significantly differ in the survival rate. In the posterior region, most of the breakages were observed (12 nos.). ARI score 1 and 2 was found to be more prevalent in the direct bonding technique whereas in the indirect bonding brackets ARI score was found to be equally distributed amongst the group. However there was no significant difference in the ARI scores between the two bonding groups. Conclusion: The overall bond failure rate was minimal, irrespective of the type of technique used to bond the brackets. Bond failure occurred at the bracket-adhesive interface. There was no statistical difference in the ARI scores between the two groups. Keywords: Orthodontic brackets, Direct bonding, Indirect bonding, Bond failure.
Highlights
Contemporary orthodontic techniques employing pre-adjusted bracket systems require accurate bracket placement as one of the requisites for successful treatment
Bond survival rates of the direct and indirect bonding group did not significantly differ which is in accordance with previous investigations
There were more bracket failures with indirect bonding when compared to direct bonding group according to a study by Deahl.[10]
Summary
Contemporary orthodontic techniques employing pre-adjusted bracket systems require accurate bracket placement as one of the requisites for successful treatment. Direct bonding of orthodontic attachments introduced by Newman[1] has become the technique of choice in modern orthodontics as it offers several advantages in terms of esthetics, hygiene, patient comfort and ease of application. It relies on the operator’s experience and expertise in attaining accuracy of bracket placement. Bonding the brackets individually over each tooth is a time consuming procedure increasing the chances of contamination. Direct bonding technique has limited application in a lingual set-up
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