Push-out strength of translucent fibre posts cemented using a dual-curing technique or a light-curing self-adhering...

Area of Science:

• Dental Materials Science
• Adhesive Dentistry
• Prosthodontics

Background:

• Accurate cementation of translucent fibre posts is crucial for restoring endodontically treated teeth.
• Evaluating the interfacial strength of different luting agents is essential for long-term clinical success.
• Dual-curing and light-curing self-adhering resin composites offer distinct advantages in post cementation.

Purpose of the Study:

• To compare the interfacial bond strength of a dual-curing resin cement and a light-curing self-adhering resin composite.
• To assess these strengths during the cementation of translucent fibre posts using a push-out test.
• To analyze bond strength across different root canal regions (coronal, middle, apical).

Main Methods:

• Thirty-four human premolars were root-filled and luted with either a dual-curing (DC) or light-curing self-adhering (LCSA) system.
• Translucent fibre posts were cemented using standardized techniques.
• Push-out tests were performed on six slices per tooth from coronal, middle, and apical regions, followed by SEM analysis for fracture patterns.

Main Results:

• No significant differences in interfacial strength were found between the DC and LCSA techniques across all root canal regions.
• The root region did not significantly affect push-out values.
• Fracture analysis revealed predominantly adhesive failures at the cement-adhesive interface for DC and the composite-dentine interface for LCSA.

Conclusions:

• The interfacial strength achieved with a light-curing self-adhering resin composite is equivalent to that of a dual-curing resin cement.
• Both luting systems demonstrate comparable performance for translucent fibre post cementation.
• Clinical choices between these materials can be based on factors beyond interfacial strength.