燃煤污染型和饮水型氟中毒地区重度氟斑牙釉质结构比较

Comparison of the Enamel Structure of Human Severely Fluorotic Teeth Between Water-drinking Endemic Fluorosis Area and Coal-burning Endemic Fluorosis Area

目的:描述并比较燃煤污染型和饮水型氟中毒地区重度氟斑牙釉质结构特点。方法:从燃煤污染型氟中毒病区湖北省恩施州咸丰县和饮水型氟中毒病区天津市塘沽区分别收集30-40岁因牙周炎拔除的氟斑牙,各选10颗,对照牙为我院外科门诊拔除的12颗完好正畸牙。所有牙表面和纵剖面在未做酸蚀处理和做了短期的酸蚀处理后用扫描电子显微镜观察釉质结构。结果:咸丰县和塘沽区的氟斑牙釉质在结构上都显示出了矿化不良的结构特点,但是咸丰县氟斑牙釉质矿化不良的程度比塘沽区的更大。结论:咸丰县和塘沽区相同年龄段重度氟斑牙釉质虽然病变程度不同,但病变性质是相同的。

Objective： To describe and compare the structure characteristics of enamel in human severely fluorotic teeth from water-drinking endemic fluorosis area and coal-burning endemic fluorosis area. Methods： The scanning electron microscopy（SEM） observations were made on 10 fluorosed teeth extracted from people of 30-40 years old for periodontitis reason from Tanggu area, Tianjing Province （water-drinking endemic fluorosis area）, and from Xianfeng county, Hubei Province （coal-burning endemic fluorosis area） respectively, and the observations were compared with those of 12 sound teeth extracted for orthodontic reason as control. The exterior surface and longitudinal surface of fluorosed teeth and normal teeth were studied by SEM without or with short of acid treatment. Results： The lesions of human fluorosed enamel from both areas had properties of hypomineralization, but the severity of human fluorosed enamel from Xianfeng county was higher than that from Tanggu area. Conclusion： The lesion properties of human severely fluorosed enamel from Xianfeng county and Tanggu area are the same, but the lesion severity is different.