Influence of luting material filler content on post cementation

Area of Science:

• Dental Materials Science
• Endodontics
• Polymer Chemistry

Background:

• Luting fiber posts to intra-radicular dentin presents challenges due to polymerization shrinkage.
• Controlling polymerization stress is crucial for successful fiber post adhesion.

Purpose of the Study:

• To test the hypothesis that filler content in resin cements does not influence fiber post luting.
• To evaluate the impact of varying filler content on polymerization stress, bond strength, and nanoleakage.

Main Methods:

• Experimental resin cements with 10%, 30%, 50%, and 70% filler content were prepared.
• Fiber posts were luted into prepared root canals, and polymerization stress was measured.
• Push-out bond strength and interfacial nanoleakage were analyzed.

Main Results:

• Increased filler content correlated with higher polymerization stress (p < 0.05).
• Higher filler content led to decreased push-out bond strength (p < 0.05).
• Greater filler content resulted in increased interfacial nanoleakage (p < 0.05).

Conclusions:

• Filler content significantly influences the performance of resin cements for fiber post luting.
• Lower-stress luting materials enhance fiber post bonding to intra-radicular dentin.
• Further in vivo studies are required to assess long-term clinical outcomes.