兰州市人口中牙体楔状缺损成因调查

目的了解兰州市人口中牙体楔状缺损的发生情况，初步探讨牙体楔状缺损发生的病因。方法随机选取95例就诊于兰州大学口腔医院的成年患者，按年龄、牙位、刷牙方式、饮食习惯、工作环境等因素进行调查分析。结果牙体楔状缺损在中、青年人中发病率为46．4％，随年龄的增长发病率逐渐升高；牙体楔状缺损发病率最高的牙位是第一双尖牙，占楔状缺损牙齿总数的29．3％。结论牙体楔状缺损与年龄、不良的刷牙方式、过硬的刷毛、不良饮食习惯等因素有关。

Investigation of the condition and cause of the wedge-shaped defects in Lanzhou population

Objective To investigate the condition and cause of the wedge-shaped defects in Lanzhou population and identify the possible risk factors associated with the formation of wedgeshaped defects. Methods 95 adult patients treated in Stomatological Hospital of Lanzhou University were randomly selected, and their ages, tooth positions, ways of toothbrushing, living and eating habits and working environments were investigated and analyzed. Results The incidence of wedge-shaped defects was 46.4% in youth and increased with age. The most common tooth position of wedge-shaped defects was at the first bicuspid teeth, taking up to 29.3% of the total number. The habits of toothbrushing, the hardness of toothbrush and the eating habits were significantly related with the formation of wedge-shaped defects. Conclusion Age, incorrect way of toothbrushing and bad eating habits are involved in the formation of wedge-shaped defects.