A visible light-activated direct-bonding material: an in vivo comparative study

Area of Science:

• Orthodontics
• Dental Materials Science
• Clinical Dentistry

Background:

• Orthodontic bracket debonding remains a clinical challenge.
• Adhesive systems, including light-cured and chemically cured types, are crucial for bracket retention.
• Evaluating the clinical performance of different adhesive systems and bracket bases is essential for optimizing treatment outcomes.

Purpose of the Study:

• To compare the clinical performance of a visible light-cured adhesive versus a chemically cured adhesive.
• To assess the influence of two different bracket base designs on adhesive bond failure rates.
• To determine if specific adhesive/bracket base combinations offer superior bond strength and reduced failure incidence.

Main Methods:

• A prospective clinical trial involving 52 patients and 542 bracket bases.
• Application of both visible light-cured and chemically cured adhesives with two types of bracket bases.
• Systematic recording of bracket bond failures, including incidence and location.

Main Results:

• The overall failure rate for the light-cured adhesive was 4.7%, and for the chemically cured adhesive was 6%.
• No statistically significant differences in failure rates were observed between the light-cured and chemically cured adhesives when used with either bracket base (p > 0.05).
• A significantly higher incidence of bond failure was noted on posterior teeth across all tested adhesive/base combinations (p < 0.001).

Conclusions:

• Both visible light-cured and chemically cured adhesives demonstrate comparable clinical performance in terms of bond failure rates.
• The choice of bracket base design did not significantly influence the failure rates of the tested adhesives.
• Posterior tooth location represents a higher risk for bracket bond failure, irrespective of the adhesive or bracket base used, necessitating further investigation and potential preventive strategies.