A Comparative Evaluation of Push-Out Bond Strength of Fiber-Reinforced Composite Posts Luted with Two Different...

This study compared the push-out bond strength of fiber-reinforced composite posts cemented with two different cement systems.

The mandibular first premolars without caries were sectioned coronally with a cutting disc, leaving 2 mm of coronal structure. Resected teeth were measured for working length, and root canals were prepared and reviewed using gutta-percha cones. Following a week of obturation, post spaces were prepared by maintaining 5-6 mm of gutta-percha at the apex and restoring with fiber-reinforced composite posts bonded with self-adhesive cement in one group and dual-cure cement in the other. After cutting the excess post with the cutting disc, the root was split coronally. Utilizing the universal testing machine, samples were push-out tested and documented. Then, the specimens were examined under a stereomicroscope to determine the failure patterns.

The self-adhesive group had an average bond strength of 86.118 ± 42.746, while the dual-cure group had 133.71 ± 66.230, with a significant difference (P = 0.04). The failure types were comparable for both materials, demonstrating that the group did not affect the failure pattern.

Dual-cure cement had stronger push-out bond strength with fiber-reinforced composite posts than self-cure cement.