Bond strength between four luting systems and enamel modified with phosphoric acid

Area of Science:

• Dental Materials Science
• Adhesive Dentistry

Background:

• Dental adhesives require strong bonds between enamel and restorative materials.
• Self-etching primers offer an alternative to traditional phosphoric acid etching in some applications.

Purpose of the Study:

• To evaluate the impact of phosphoric acid etching on the bond strength of enamel to three self-etching primer luting materials.
• To compare the efficacy of two etching agents (K-etchant and Red Activator) in conjunction with these materials.

Main Methods:

• Bovine enamel surfaces were prepared and etched with K-etchant or Red Activator.
• Three self-etching primer luting materials (PanaviaF2.0, Linkmax, Multibond) and a control (Super-Bond) were tested.
• Tensile bond strengths were measured after 24-hour water immersion.

Main Results:

• Phosphoric acid etching significantly increased bond strengths for all tested luting materials compared to non-etched controls.
• No significant difference in bond strength was observed between K-etchant and Red Activator.
• Super-Bond exhibited the highest tensile bond strength when used with either K-etchant or Red Activator.

Conclusions:

• Phosphoric acid etching is beneficial for improving the bond strength of self-etching primer luting materials to enamel.
• Both K-etchant and Red Activator effectively enhance bond strength, with comparable results.
• Super-Bond demonstrates superior performance in terms of bond strength when combined with phosphoric acid etching agents.