【摘要】 通过离体牙实验,采用Er:YAG激光和Er,Cr:YSGG激光对人恒牙牙釉质进行消融阈值的实验研究。使用渐增的2~10 J/cm2能量密度对70个牙釉质样本进行辐照,应用体视显微镜和扫描电镜观察辐照后牙釉质表面的形态改变。结果表明,Er:YAG激光和Er,Cr:YSGG激光均能有效地消融牙釉质,Er:YAG激光消融牙釉质的阈值为3.19~4.36 J/cm2,Er,Cr:YSGG激光消融牙釉质的阈值为4.12~4.80 J/cm2。更多还原

【Abstract】 The aim of the study is to evaluate the ablation threshold of enamel of human permanent tooth for Er:YAG laser and Er,Cr:YSGG laser.70 enamel samples were treated with increasing energy densities of 2~10 J/cm2.The surface changes were assessed by means of reflected light microscope and scanning electron microscope.Both Er:YAG laser and Er,Cr:YSGG laser are effective in ablating human tooth enamel.The ablation threshold value of Er:YAG laser in dental enamel is 3.19~4.36 J/cm2.As to Er,Cr:YSGG laser,the ablation threshold value is 4.12~4.80 J/cm2.更多还原