目前,临床上粘结托槽常规采用磷酸酸蚀技术,但其有以下不足:①引起牙釉质表面的不可逆脱矿(深度约10μm);②残余磷酸可能造成牙体硬组织和局部软组织的损伤;③去托槽时有可能造成釉质折裂。为了克服这些不足,部分学者尝试弱酸或采用牙科激光技术。本研究选用两种常用的牙科激光与磷酸酸蚀技术进行对比研究。 At present, phosphate-acid etching technique is commonly used in clinically bonded brackets, but it has the following deficiencies: ① causing irreversible demineralization on the surface of enamel (about 10 μm in depth); ② residual phosphoric acid may cause damage to dental hard tissue and local soft tissues ; ③ to the bracket may cause enamel fracture. In order to overcome these deficiencies, some scholars try to weak acid or using dental laser technology. In this study, two commonly used dental laser and phosphoric acid etching techniques were compared.