effects of 980 nm diode laser irradiation on bond strength of fiber posts to root canal dentin

Objective: the present in vitro study aimed to evaluate the effect of a 980 nm diode laser irradiation on the bond strength of fiber posts to intracanal dentine.methods: twenty-four extracted human maxillary central incisors were obtained. after root canal treatment, the samples were randomly divided into two groups (n=12): in group 1, root canal dentin was subjected to diode laser irradiation (980 nm, 1w, continuous wave) whereas group 2 was considered the control group and was not irradiated. fiber posts were cemented using resin cement. the pull-out bond strength of the fiber posts was assessed with a universal testing machine. the data were analyzed by an independent samples t-test (α=0.05).results: the average fracture strength of the laser-irradiated group (90.04 ± 30.45 mpa) was significantly higher than the control group (62.95 ± 22.09 mpa; p = 0.021).conclusions: diode laser irradiation to the root canal can increase the bond strength of fiber posts to intraradicular dentin.