新型复合充填材料是修复大面积唇面釉质的最美观的材料,酸蚀法可使它和棱柱结构分明的釉质连接。但是,边缘封闭的有效性可因解剖部位及釉质表面结构的状况而受到影响。牙颈部的釉质较薄和釉柱结构更不规则,以及其表面可以没有釉柱条纹的特征。在牙体部和切端作出平接(butt)或搭接(bevel)预备后,可通过釉质壁的酸蚀 The new composite filling material is the most beautiful material for repairing large area enamel, which can be connected with a well-defined enamel by acid etching. However, the effectiveness of edge closure can be affected by the condition of the anatomical site and enamel surface structure. Cervical enamel thinner and glazed column structure is more irregular, and its surface can be no glazed stripe features. After the butt or bevel preparation of the dental part and the incised end, etching through the enamel wall