Study on the effect of Nd∶ YAG laser irradiation on the surface structure and temperature of implants
LI Qian
KONG Ya-qun
Alaxander Franz
LIU Yao-ran
Andreas Moritz
ZHAO Ji-zhi
Abstract：Objective To investigate the effect of irradiation with Nd ∶ YAG laser on the surface microstructure and temperature change of dental implants in vitro,in order to provide the reference for clinical parameter setting and operation method.Methods The titanium discs were irradiated by Nd ∶ YAG laser with different parameter setting.The surface microstructure was observed by scanning electron microscope,and the temperature elevation was measured by thermocouple.The time to reach a 10℃ increase in temperature was recorded as well.Results (1) Local areas with surface melting on 0.2W (20 mJ,10 Hz)and significant melting with crackson 1W setting (100 mJ,10 Hz or 50 mJ,20 Hz) were observed after Nd ∶ YAG laser irradiation without cooling,while the surface of the titanium disk is still molten with water vapor cooling.(2)The temperature elevation of titanium discs were less than 10℃ with low power setting or water cooling conditions of Nd ∶ YAG laser irradiation for 30 seconds.It took 13.8,6.2 and 7.8 seconds,respectively,to reach a 10℃ increase threshold in temperature after being irradiated with 0.5 W (50 mJ,10 Hz)and 1W(100 mJ,10 Hz or 50 mJ,20 Hz) without cooling conditions.Conclusion Direct and prolonged exposure to Nd∶YAG laser leads to microstructure change of implant surface,and may produce a risk of thermal damage to surrounding tissue.The reasonable parameter setting,mobile radiation mode and cooling are suggested.
Keywords：Nd∶ YAG lasersurfacetemperatureperi-implantitis
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 360-364 )