窝沟封闭是世界卫生组织推荐的预防窝沟龋的有效办法，其主要对象是儿童。我院近年来开展了此项技术，取得较好效果。材料和方法一、窝沟封闭对象：选择年龄3～4岁的乳磨牙，6～7岁的第一恒磨牙，12～13岁的第二恒磨牙，9～13岁的第一、二双尖牙，其表面有患龋倾向的深在裂沟和 Pit and fissure sealant is recommended by the World Health Organization to prevent pit and fissure caries effective method, the main target is children. Our hospital in recent years carried out this technology, achieved good results. Materials and methods First, the pit and fissure closed objects: Select the age of 3 to 4 years old molars, first permanent molars 6 to 7 years old, 12 to 13 years of the second permanent molars, 9 to 13 years of the first and second pairs Fangs, the surface of the deep caries in the fissures and tendency