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A randomized clinical trial comparing 'one-step' and 'two-step' orthodontic bonding systems
N Manning1, S M Chadwick, D Plunkett
1Countess of Chester NHS Trust, Health Park, Liverpool Road, Chester CH2 1UL, UK.
Journal of Orthodontics
|December 5, 2006
Summary
This clinical trial found similar low bond failure rates for self-etching primer (SEP) and conventional acid-etched orthodontic bracket bonding. Maxillary bracket location was the only significant factor influencing failure, with lower rates than previously reported.
Area of Science:
- Orthodontics
- Dental Materials Science
Background:
- Orthodontic bracket debonding remains a clinical challenge.
- Self-etching primers (SEP) offer a potential alternative to conventional acid-etching techniques.
- Assessing clinical bond failure rates is crucial for treatment efficiency.
Purpose of the Study:
- To compare the clinical bond failure rates of orthodontic brackets using SEP versus a conventional acid-etched technique.
- To identify factors influencing bracket failure, including operator, patient, and tooth characteristics.
Main Methods:
- Prospective randomized controlled clinical trial.
- Single-centre study involving 34 orthodontic patients.
- Comparison of bond failure rates between SEP and Transbond (control adhesive).
Main Results:
- No statistically significant difference in failure rates between SEP (7.0%) and Transbond (7.4%) over the treatment duration.
- Maxillary bracket location showed a higher likelihood of failure compared to mandibular brackets.
- Overall failure rates were low and comparable to or lower than previous studies.
Conclusions:
- Both SEP and conventional acid-etching techniques are clinically successful for orthodontic bracket bonding.
- The combined failure rate in this study was lower than reported in similar trials.
- Bracket location is a significant factor in bond failure, with maxillary sites being more prone to failure.
