Abstract
Failure of brackets is a common problem in orthodontics. This affects the treatment time, cost, and compliance of the patient. This study was conducted to estimate the bracket failure rate and the related factors for the long term. Methodology. This ambidirectional cohort study included 150 nonsyndromic orthodontic patients undergoing fixed appliance therapy for the last two years. The same patients were followed for 7 months. Different variables related to bracket failure were evaluated. The available data were analyzed descriptively, and the Kaplan-Meier estimate was used to measure the bracket survival rate from the date of bonding to failure. Results. A total of 180 bracket bond failures in the 150 included patients (52.2% males and 47.8% females) with a median age of 17 years (range 10-25 years). 69% of brackets failures were reported within the first 6 months after bonding. About 58.3% of bracket failure was noticed in adolescent patients before the age of 18 years. The majority of the cohort (81.1%) has good oral hygiene. The failure rate in patients with normal overbite was 41.1%, in decreased overbite cases was 15%, while in deep bite cases the failure rate was 43.9% with a statistically significant difference. Adults show less bracket failure (41.7%) than adolescent patients (58.3%). More bracket failure was noted in the lower arch (55%) than the upper arch (45%), and there were more bond failures posteriorly (61%) than on the anterior teeth (39%). Majority (41.1%) of the bracket failed on round NiTi wires. Conclusion. The bracket failure rate was 6.4%, with most bracket failure occurring in the first 6 months after bonding with individual difference. There was more incidence of bond failure in an increased overbite, adolescents, lower arch, posterior teeth, and lighter alignment wires.
Highlights
Orthodontics encompasses treatment modalities to correct dentoalveolar malocclusions aiming to restore dentofacial esthetics and function
The edgewise brackets were introduced in 1928 by Edward Angle [1]. These brackets were welded to orthodontic bands, and bands were cemented on the teeth [2], but Buonocore [3] in 1955 introduced acid etching which paved the path for attaching brackets directly to the teeth
150 out of 280 patients undergoing orthodontic treatment were included in the study. 62 patients were excluded due to insufficient records, 56 patients have bonded brackets from a different manufacturer or bonded by a different adhesive or protocol, and 12 patients had clefts/syndromes
Summary
Orthodontics encompasses treatment modalities to correct dentoalveolar malocclusions aiming to restore dentofacial esthetics and function. The most accepted method to achieve these goals is the use of fixed appliances. Brackets are bonded to apply forces from archwires and other auxiliaries to the dentition. The edgewise brackets were introduced in 1928 by Edward Angle [1]. These brackets were welded to orthodontic bands, and bands were cemented on the teeth [2], but Buonocore [3] in 1955 introduced acid etching which paved the path for attaching brackets directly to the teeth. Newman et al [4] pioneered the idea of bonding brackets with composite resin on the surfaces of treated enamel, which is a standard method of bonding
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call