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12-month self-ligating bracket failure rate with a self-etching primer
Selma Elekdag-Turk1, Fethiye Cakmak, Devrim Isci
1Department of Orthodontics, Faculty of Dentistry, University of Ondokuz Mayis, Samsun, Turkey. turkset@superonline.com
The Angle Orthodontist
|October 25, 2008
Summary
The self-etching primer (SEP) showed a higher bracket bond failure rate (4.7%) compared to the conventional method (1.7%). However, SEP is still effective for bonding orthodontic brackets.
Area of Science:
- Orthodontics
- Dental Materials Science
Background:
- Conventional bonding methods for orthodontic brackets often involve multiple steps.
- Self-etching primers (SEPs) offer a simplified, single-step alternative for bracket bonding.
Purpose of the Study:
- To compare the clinical performance of a self-etching primer (SEP) with a conventional two-step etch and primer method (CM).
Main Methods:
- A split-mouth design was used, bonding 688 brackets on 39 patients using either Transbond Plus Self-Etching Primer or Transbond XT conventional method.
- Kaplan-Meier analysis estimated bracket survival rates, with comparisons made using the log-rank test.
- Adhesive Remnant Index (ARI) assessed bond failure interface.
Main Results:
- The bond failure rate for SEP was 4.7%, significantly higher than the 1.7% for CM (P < .05).
- Canine and premolar teeth had lower survival rates than incisors (P < .05).
- No significant differences in survival rates were found between dental arches or patient gender, nor in ARI scores.
Conclusions:
- The self-etching primer (Transbond Plus) demonstrates effective clinical performance for bonding orthodontic brackets.
- Despite a higher failure rate, SEP offers a viable alternative to conventional methods.