Dyes for caries detection influence sound dentin bond strength

Area of Science:

• Dental Materials Science
• Adhesive Dentistry
• Caries Detection

Background:

• Caries-detection dyes are used to identify decayed tooth structure.
• Their potential effect on the bond strength of restorative materials to dentin is not fully understood.

Purpose of the Study:

• To evaluate how caries-detection dyes influence the in vitro tensile bond strength of adhesive materials to sound dentin.
• To compare the effects of two different caries-detection dyes.

Main Methods:

• Sound human molars were prepared to expose superficial dentin.
• Two caries-detection dyes were applied and rinsed.
• Dentin was acid-etched, and an adhesive (Prime & Bond 2.0) was applied.
• Bond strength specimens were prepared using a composite (TPH Spectrum), compomer (Dyract), and hybrid ionomer (Advance).
• Tensile bond strength was measured after 24 hours.

Main Results:

• Without dyes, TPH Spectrum and Dyract exhibited higher bond strengths than Advance.
• Caries-detection dyes significantly reduced the bond strength of TPH Spectrum and Dyract.
• Advance hybrid ionomer's bond strength was not significantly affected by the dyes.

Conclusions:

• Caries-detection dyes can compromise the bond strength of certain dental composites and compomers to dentin.
• Advance hybrid ionomer demonstrates superior bond durability in the presence of caries-detection dyes.