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作者于１９９０年３月～１９９１年５月对四川省双流县华阳镇２１９４名中小学生进行了错畸形调查，发现多个相邻乳牙前牙反对乳牙反的构成比在人工喂养组、辅助人工喂养组显著高于母乳喂养组。人工喂养、辅助人工喂养对多个相邻乳牙前牙反的相对危险反分别为２．５３．２．６８．在排除其它可能引起反的因素后，人工喂养、辅助人工喂养仍为有显著意义的危险因素，在该人群进行的病例对照研究也显示人工喂养、辅助人工喂养对多个相邻乳牙前牙反是有显著意义的危险因素，比值比分别为５．０９（９５％可信限２．２６～１１．６５），５．８９（９５％可信限２．２８～１４．９９）．上述事实提示母乳喂养对预防乳牙反有重要意义。
The author conducted a survey of 2194 primary and secondary school students in Huayang Town, Shuangliu County, Sichuan Province from March 1990 to May 1991, and found that the composition of many adjacent primary teeth opposed the deciduous teeth was higher than that of the artificial feeding group and assisted labor Feeding group was significantly higher than breastfeeding group. The relative risk of artificial feeding and assisted feeding on multiple adjacent anterior teeth was 2.53.2.68. After excluding other factors that may cause anti-factors, artificial feeding, assisted feeding is still a significant risk factor, the case-control study conducted in the population also showed that artificial feeding, assisted feeding on a number of adjacent deciduous teeth Were significant risk factors, with odds ratios of 5.09 (95% CI 2.26 to 11.65) and 5.89 (95% CI 2.28 to 14.99, respectively). The above facts suggest that breastfeeding is of great importance in preventing deciduous teeth.