Orthodontic Bracket Bonding Using Self-adhesive Cement to Facilitate Bracket Debonding.

Area of Science:

• Dental Materials Science
• Orthodontic Adhesives
• Biomaterials

Background:

• Orthodontic bracket bonding relies on adhesive strength and ease of removal.
• Evaluating new adhesive systems is crucial for improving clinical outcomes.
• Understanding adhesive behavior on enamel impacts treatment efficacy and patient safety.

Purpose of the Study:

• To compare the shear bond strength (SBS) of orthodontic brackets bonded with two different adhesives.
• To assess the adhesive remnant index (ARI) and bracket base condition post-debonding.
• To evaluate the effect of enamel etching on adhesive performance.

Main Methods:

• Ninety human premolars were divided into three groups: Transbond XT, Multilink Speed, and Multilink Speed with prior enamel etching.
• Shear bond strength (SBS) was statistically analyzed using one-way ANOVA.
• Adhesive Remnant Index (ARI) scores and scanning electron microscopy (SEM) were used to evaluate enamel and bracket surfaces.

Main Results:

• The Multilink group exhibited significantly lower SBS compared to Transbond XT and Multilink with etching (p < 0.05).
• SEM revealed minimal resin tag penetration and predominant resin adhesion to bracket bases in the Multilink group.
• The Multilink+etch group showed improved resin tag penetration compared to the Multilink group.

Conclusions:

• Multilink Speed on non-etched enamel provides acceptable SBS for orthodontic bracket bonding.
• This adhesive system demonstrates minimal resin tag penetration and reduced residual adhesive on enamel.
• Enamel etching may enhance adhesive performance, warranting further investigation.