Abstract：Objective:980 nm diode laser had been used in soft tissue management around implant and periimplantitis treatment. However, the effect of 980 nm diode laser irradiation on the implant is only partially known. The aim of this study was to investigate the effect of irradiation with 980 nm diode laser on the surface microstructure and temperature change of dental implants in vitro, in order to provide the reference for clinical applications. Methods:Titanium discs were irradiated with 980 nm diode laser with a range of power setting. The surface microstructure was observed by scanning electron microscope, and the temperature elevation was measured by thermocouple. Temperature increment and time to reach a 10 ℃ threshold was recorded. Results:No surface alternation was detected after 980 nm diode laser irradiation with all power setting. Temperature elevation of titanium discs after 20 seconds irradiation with 1 W, pulse mode, is 19.8 ℃, and it took 10.2 seconds to exceed a critical threshold of 10 ℃. Temperature rose significantly and rapidly when titanium discs were irradiated with higher power setting or continue wave mode. Conclusion:980 nm diode laser irradiation does not change the surface structure of dental implant, but may produce a risk of thermal damage of surrounding tissue.
2017, Vol. 26 
