Efficacy of Er:YAG Laser Treatments of Root Canal Walls on the Pull-out Bond Strength of Fiber Posts

doi:10.13701/j.cnki.kqyxyj.2017.01.024

Abstract

Abstract: Objective: To evaluate the effects of Er:YAG laser irradiation under different power settings on the micro tensile bond strength (μTBS) of fiber-reinforced composite posts. Methods: Root canals of 60 single-rooted human teeth were filled and post spaces were prepared. Specimens were divided randomly into five groups, each consisting of 12 specimens as follows: control group, 3W-50μs Er:YAG laser, 3W-100μs Er:YAG laser, 4.5W-50μs Er:YAG laser, and 4.5W-100μs Er:YAG laser. After the root canal procedures, fiber posts were cemented to the root canal. Micro-tensile bond strength tests were performed using a universal testing machine at a crosshead speed of 1 mm/min. The data were analyzed using a two-way ANOVA test (α=0.05). Results: Irradiation by the 3W-100μs Er:YAG laser positively affected the micro-tensile bond strength (5.55±0.97MPa). The bond strength was significantly higher than that of control group (4.06±1.22 MPa, P＜0.05). Conclusion: Er:YAG laser may alter the dentin bond durability.

Key words: Er:YAG, laser, Dentin, Bond, strength

CLC Number:

R783.2

LI Jin-hong, JIN Dong-mei, WANG Su. Efficacy of Er:YAG Laser Treatments of Root Canal Walls on the Pull-out Bond Strength of Fiber Posts[J]. Journal of Oral Science Research, 2017, 33(1): 102-105.

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