本实验目的在于评价传统窝沟封闭术与MicroprepTM洞型制备系统辅助窝沟封闭的治疗效果。实验以新鲜离休猪牙20只为实验对象，分为实验组与传统方法的对照组两组进行，以SEM观察封闭剂的密合度及窝沟的深度。结果表明，SEM观察实验组具有较为完善的封闭效果，传统方法往往形成表浅封闭（super—filling），最后结论为：通过洞型制备机处理窝洞后，才能达到真正意义的封闭。 The purpose of this experiment was to evaluate the efficacy of the traditional pit and fissure sealant and MicroprepTM tunnel-type preparation system to aid in the treatment of pit and fissure sealant. Twenty fresh pigs were randomly divided into two groups: experimental group and control group. SEM observation of sealant adhesion and pit depth were carried out. The results show that the SEM observation group has a perfect sealing effect, the traditional method often forms super-filling, and finally concludes that the true sealing can be achieved only after the cavity is processed by the hole preparation machine.