Resin adhesion to caries-affected dentine after different removal methods

Area of Science:

• Dental Materials Science
• Cariology
• Adhesive Dentistry

Background:

• Caries-affected dentine is a critical substrate in dental restorations.
• Effective caries removal is essential for successful bonding of dental adhesives.
• Various methods exist for caries removal, each potentially affecting dentine substrate properties.

Purpose of the Study:

• To evaluate the microtensile bond strength of two dental adhesives to caries-affected dentine.
• To compare the influence of three different caries removal methods on adhesive bond strength.
• To assess the interaction between adhesive type and caries removal technique.

Main Methods:

• Caries-affected dentine was prepared using a round steel bur, Er:YAG laser, or silicon carbide abrasive paper.
• Two adhesives, Clearfil Protect Bond and OptiBond Solo Plus Total-Etch, were applied according to manufacturer instructions.
• Microtensile bond strength was tested, and data were analyzed using two-way ANOVA and LSD tests.

Main Results:

• Clearfil Protect Bond exhibited lower bond strength than OptiBond Solo Plus Total-Etch when using a round steel bur.
• The opposite result was observed when using silicon carbide abrasive paper, with Clearfil Protect Bond showing higher bond strength.
• No significant difference in bond strength was found between the adhesives when Er:YAG laser was used for caries removal.

Conclusions:

• The choice of caries removal method significantly influences resin adhesion to caries-affected dentine.
• Different dental adhesives respond variably to different caries removal techniques.
• Understanding this interaction is crucial for optimizing restorative treatment outcomes.