【摘要】 目的　探讨楔状缺损与牙合面磨损发病率的相关性及二者程度的相关性 ;分析二者在发生和加重方面的共同因素。方法　随机选取口腔内科就诊的患者 393例 ,调查活髓双尖牙 ,记录年龄、性别、刷牙习惯、咀嚼习惯、疲劳微裂、楔状缺损深度 (mm)与磨损指数 (TWI) ,进行统计学分析。结果　楔状缺损与牙合面磨损的发病率具有相关性 ,楔状缺损深度与牙合面磨损指数在一定范围内呈正相关 ,等级相关系数有极显著性意义。楔状缺损与磨损同时发生的患者中 ,喜用力刷牙并长期使用横刷法的占 74 % ;喜爱咀嚼耐磨食物或硬物的占 6 7% ;疲劳微裂发生率为 95 % ;男性发病率与病损程度均高于女性 ;随年龄增加 ,楔状缺损与磨损的发病率与程度均有所增加。结论　牙合力与机械摩擦是二者发生的共同因素。时间因素 ,机械摩擦与牙合力积累是二者共同的加重因素更多还原

【Abstract】 Objective To analyse the correlation between morbidity of wedge-shaped defect and abrasion.Methods 393 patients were selected and their bicuspid teeth(vital pulp),the age,sexual distinction,habit of brushing teeth and chewing,fatigue microcrack,depth of wedge-shaped defect(mm)and abrasion index(TWI),were recorded and statistically analysed.Results The morbidity of wedge-shaped defect and abrasion was correlated.The depth of wedge-shaped defect and the index of abrasion had positive correlation.Conclusion Occlusal force and mechanical friction are the common factors of the morbidity of the two lesions.Time,mechanical friction and occlusal force accumulation are the common aggravating factors of the two diseases.更多还原