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本研究随机抽出140例楔状缺损患者及无楔状缺损者,每例凋查23个因素,经逐步回归分析,剔除刷牙,酸腐蚀等对楔状缺损作用无显著性的因素,找出咬合面磨耗及年龄两个对楔状缺损作用显著的因素。外力作用会引起牙颈部明显的应力集中,年龄增长,导致应力集中反复多次的重复,则可能使牙颈表面出现疲劳裂纹,若牙颈部再累及化学腐蚀和牙刷机械摩擦,就可能加速疲劳破坏,更快地形成楔状缺损.
In this study, we randomly selected 140 wedge-shaped defect patients and wedge-shaped defect-free, 23 cases of each case witnessing regression analysis, excluding brushing, acid corrosion and other factors on the wedge-shaped defect was not significant factors to find occlusal surface wear and Age Two significant effects on wedge-shaped defects. External forces can cause significant stress in the dental neck, increasing age, resulting in repeated stress concentration repeated many times, it may cause fatigue cracks on the surface of the neck, if the tooth neck and then involving the chemical corrosion and toothbrush mechanical friction, it may accelerate Fatigue damage, faster formation of wedge-shaped defects.