青铜峡市8～12岁学龄儿童氟斑牙防治效果分析

Preventive efficacy of dental fluorosis among 8-12 school-age children in Qingtongxia

目的了解青铜峡市地方性氟中毒病区改水后儿童氟斑牙患病情况及其防治效果,为指导地方性氟中毒的防治工作提供科学依据。方法采取整群随机抽样的方法,对青铜峡市2006年已改水的改水队1(高氟重病区叶盛镇叶盛5队)、改水队2(高氟轻病区大坝镇新桥5队)、未改水队(大坝镇滑石沟5队)670名8～12岁儿童进行氟斑牙患病情况调查,根据病变程度进行分型分度,计算患病率。结果 2011年改水队1和改水队2儿童氟斑牙患病率均低于未改水队,差异有统计学意义(χ2值分别为5.012,20.676,P值均<0.05)。儿童氟斑牙临床分度与水氟质量浓度间显著相关(r=0.638,P<0.05)。2个改水队改水后水氟质量浓度分别为(0.24±0.05)mg/L、(0.32±0.07)mg/L,已达到国家正常标准。结论青铜峡市地方性氟中毒病区改水降氟防治措施取得了一定成效。但儿童氟斑牙尚存在一定程度的流行,未达到完全控制。

Objective To evaluate the results of water improvement project aimed in.eliminating the prevalence of dental fluorosis in endemic fluorosis areas of Qingtongxia City. Methods By using epidemiological sample survey methods, 670 children （ 8 - 12 years } had been examined in dental fluorosis in Yesheng 5th team Yesheng Township, where endemic fluorosis was serious- ly prevailed and had become water-improvement area in 2006 ; Daba township, where endemic fluorosis mild prevailed ; and Huash- igou 5th team, which was not included in water-improvement area. And according to the degree of disease classification indexing, prevalence rate was calculated. Results There was evident differences of the dental fluorosis in water-improvement areas and the place was not in the water-improvement Projects areas IX2 = 5. 012, 20.676, P 〈 0.05 ）. There was significant correlation between water fluorine concentration and Children~ dental fluorosis clinical dividing{ r = 0.638, P 〈 0.05 }. The fluoride content in drinking water was （0.24 ~0.05）mg/L and （0.32 ~0.07） mg/L in the two water-improvement teams, which met the national standard. Conclusion After Water-improvement Projects in the endemic fluorosis areas of Qingtongxia City. Drinking water conform to the hygiene requirement. The dental fluorosis are still damaging the health of population.