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第一恒磨牙在恒牙列中萌出最早,咀嚼功能最大,对儿童牙颌系统的生长发育和身体健康关系密切。据报告,混合牙列时期,它的患龋率在30%左右,并认为该牙的患龋率几乎可以代表混合牙列期恒牙的患龋率,因此,在儿童时期预防第一恒磨牙龋齿的发生意义重大。1979年我们在进行自凝防龋剂(窝沟封闭剂)
The first permanent molars in the permanent eruption of the earliest column, the largest masticatory function, the growth and development of children's dental system and body health are closely related. It is reported that mixed dentition period, its prevalence of caries was about 30%, and that the tooth caries prevalence rate almost represents the prevalence of mixed dentition permanent teeth caries rate, therefore, in childhood to prevent the first permanent molars The occurrence of dental caries is of great significance. In 1979, we are carrying out anticoagulants (pit and fissure sealant)