Ismail A I, Brodeur J M, Kavanagh M, Boisclair G, Tessier C, Picotte L
Faculty of Dentistry, Dalhousie University, Halifax, Canada.
Caries Res. 1990;24(4):290-7. doi: 10.1159/000261285.
The purpose of this study was to evaluate the difference in dental caries and fluorosis prevalence in 936 randomly selected life-long residents selected from public and private schools in Trois-Rivières (1.0 ppm F in 1987) and Sherbrooke (less than 0.1 ppm F), Que., Canada. Students, 11-17 years of age, were examined for dental caries using the National Institute for Dental Research criteria and for dental fluorosis using the Tooth Surface Index of Fluorosis. Because of an inconsistent fluoridation history in Trois-Rivières, comparisons were carried out between two age strata: students 11-14 years of age who consumed for a longer duration suboptimally fluoridated water than those in the second stratum: students 15-17 years of age. Only public school students, 15-17 years of age, from Trois-Rivières had significantly lower mean filled surface and decayed, missing, and filled tooth surface (DMFS) scores (28 and 24%, respectively) than similar students in Sherbrooke. Among private school students, differences were not found, except in the youngest age group in Sherbrooke who had significantly lower mean DMFS than similar students from Trois-Rivières. The prevalence of fluorosis was 45.6% and 58.0% in Trois-Rivières public and private schools, respectively, and 31.1% and 30.1% in Sherbrooke public and private schools, respectively. The use of fluoride tablets was significantly associated with fluorosis. This study showed that water fluoridation benefitted students from public schools and that the risk factors for dental fluorosis were the use of fluoridated water and fluoride tablets.
本研究的目的是评估从加拿大魁北克省三河城（1987年氟含量为1.0 ppm）和舍布鲁克（氟含量低于0.1 ppm）的公立和私立学校随机选取的936名终身居民的龋齿和氟斑牙患病率差异。对11至17岁的学生进行检查，使用美国国立牙科研究所的标准检查龋齿情况，使用氟斑牙表面指数检查氟斑牙情况。由于三河城的氟化历史不一致，因此在两个年龄层之间进行了比较：11至14岁的学生饮用氟含量未达最佳标准的水的时间比第二层的学生更长，第二层为15至17岁的学生。只有三河城15至17岁的公立学校学生的平均补牙面和龋失补牙面（DMFS）得分显著低于舍布鲁克的类似学生（分别低28%和24%）。在私立学校学生中，未发现差异，但舍布鲁克最年轻年龄组的平均DMFS得分显著低于三河城的类似学生。三河城公立和私立学校的氟斑牙患病率分别为45.6%和58.0%，舍布鲁克公立和私立学校的氟斑牙患病率分别为31.1%和30.1%。使用氟片与氟斑牙显著相关。本研究表明，水氟化对公立学校的学生有益，氟斑牙的风险因素是饮用含氟水和使用氟片。
