【摘要】 本文介绍了牙齿的吸收光谱及不同种类的激光对牙齿的作用。结果表明，较大能量密度的连续波激光，可瞬时气化牙釉质、牙本质等，与此同时还引起牙齿未作用区的龟裂，实验测得最大无龟裂能量密度约为１００Ｊ／ｃｍ２，而脉冲激光作用界限明晰，且周边无龟裂更多还原

【Abstract】 This study gives information on theabsorption spectrum of tooth and the effects that different kinds of laser take on tooth.It comes to a conclusion that laser that have continuous waves and more energy density can gasify enamel,dentine etc,in a twinking.Moreover,it can set off chaps in the areas that have′t been effected.According to the conclusion of experiment,the most energy density is about 100J/cm 2,and the effects of pulse laser have clear boundary line,and there are no chaps in the peripherg.更多还原