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广州市芳村区,1965年7月14日开始实行自来水加氟,使水氟年均由0.2～0.3毫克/升提高到0.8。我们在该区幼儿园进行了如下观察。对象和方法 1967年1月,1969年9月和1971年5月,我们对芳村区五个幼儿园儿童进行了口腔检查和身高测量。这些幼儿是在芳村地区出生、居住并饮用自来水的。龋齿的诊断标准采用1957年全国龋病牙周病调查统一规定。龋齿包括已充填和未充填的(df)。恒牙萌出指露尖以后。乳牙正常色质以观察乳切牙为主。乳白色质指牙冠呈正常乳白色(不是白垩色),从唇面看在切缘及邻面边
Fangcun District of Guangzhou City, July 14, 1965 began to implement tap water and fluoride, so that water fluoride by 0.2 ~ 0.3 mg / l increased to 0.8. We conducted the following observations in this district kindergarten. Subjects and methods In January 1967, September 1969 and May 1971, we performed oral exams and height measurements on five kindergarten children in Fangcun District. These young children were born, lived and tapped in Fangcun area. Dental caries diagnostic criteria using the 1957 National Caries Periodontal Disease Survey uniform provisions. Dental caries include filled and unfilled (df). Permanent teeth erectile pointed after the tip. Primary color of primary teeth to observe the primary incisors. Milky white refers to the normal crown of milk white (not chalk), seen from the lip in the margin and the adjacent edge