Background: The long-term success of post-endodontic restorations depends largely on the retention of fibre posts within the root canal system. Fibre-reinforced composite posts have gained considerable popularity because of their favourable mechanical properties, biocompatibility, and elastic modulus, which is comparable to that of dentine. Light-transmitting fibre posts have been developed to improve resin cement polymerisation by allowing deeper penetration of curing light within the root canal.

Aim: To compare the push-out bond strength of light-transmitting fibre posts and conventional fibre posts cemented with a dual-cure resin cement at the coronal and middle root levels of endodontically treated teeth.

Materials and Methods:

Twenty extracted human single-rooted teeth with mature apices were selected for the study. Following biomechanical preparation, the canals were obturated, and post spaces were prepared using Peeso reamers up to size No. 4. The specimens were randomly allocated into two groups (n = 10): Group I (light-transmitting fibre posts) and Group II (conventional fibre posts). Posts measuring 1.4 mm in diameter were cemented using a dual-cure resin cement. Specimens were sectioned to obtain slices from the coronal and middle root levels. Push-out bond strength was evaluated by measuring the maximum dislodgement force (Fmax) in Newtons (N) using a universal testing machine operating at a crosshead speed of 1 mm/min. Statistical analysis was performed using independent-samples t-tests and paired-samples t-tests with the level of significance set at p < 0.05.

Results: Light-transmitting fibre posts demonstrated significantly greater maximum dislodgement force values at the coronal root level (p = 0.036). However, no statistically significant difference was observed between the groups at the middle root level (p = 0.090). The coronal root level demonstrated significantly higher values than the middle root level (p < 0.001).