【摘要】 本文采用扫描电镜和电子探针分析方法，研究脉冲Nd：YAG激光0.75W／15pps，2.0min；562．5J／cm2）照射，对牙本质结构和成分的影响，结果表明：激光照射可造成牙本质表面的熔融和再结晶，牙本质熔融深度约15μm；但牙本质的钙磷含量水平无明显改变。更多还原

【Abstract】 Effects of Nd: YAG laser irradiation on dentin was studied by scanning electron microscope and electron microprobe. The results showed that the dentin surface lased by pulsed Nd: YAG 1aser appeared to be melted and recrystallization; the fracture samples revealed a layer of melted dentin devoid of tubular structure (15μm thick); there were no changes of calcium and phosphorus levels in the melted dentin, only evaporation of water and organic materials.更多还原