Methods 673 teeth were treated with NaF paste.S.E.M was used to observe the structure changes and desensitive mechanisms in vertical and horizontal plane of dentin in extracted tooth.

• 方法对673颗患牙应用多功能牙科粘结剂及75%25氧化钠糊剂分别进行脱敏治疗,做近期疗效观察比较并运用扫描电镜观察离体牙牙本质横、纵断面的结构变化、作用机理。