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目的 了解楔状缺损的病因。方法 对有侧方牙合早接触的牙进行4 年观察。结果 侧方牙合早接触牙在4 年内能形成楔状缺损。结论 楔状缺损的病因与侧方牙合早接触有关, 它能引起创伤牙合, 由于应力集中在牙颈部形成楔状缺损
Objective To understand the etiology of wedge-shaped defects. Methods Four-year follow-up of the teeth with lateral occlusion was observed. Results The lateral occlusal contact tooth can form wedge-shaped defect within 4 years. Conclusion The etiology of wedge-shaped defect is related to the early contact of lateral occlusion, which can cause traumatic occlusion. Due to stress concentration, the wedge-shaped defect