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第一恒磨牙在恒牙列中前出最早，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。在儿童时期预防第一恒牙龋齿的发生意义重大。为此于1993年对市区1003名6～12岁儿童第一恒磨牙龋病的患病情况及好发部位作了调查，以求为开展龋病的预防工作提供参考。1调查对象和
The first permanent molars in the ear before the first out of the column, the largest mastication function, the growth and development of children’s dental system and body health are closely related. Prevention of first permanent tooth decay in childhood is of great significance. To this end in 1993 in the city of 1003 children aged 6 to 12 years of the first permanent molar dental caries prevalence and the incidence of sites were investigated in order to carry out prevention of dental caries provide a reference. 1 respondents and