楔状缺损是常见的非龋性牙体硬组织缺损,近年来我们采用根管校钉—银汞合金充填联合修复法治疗前磨牙重度楔状缺损,取得了满意的临床效果。 方法: 1.牙髓坏死、坏疽和已形成尖周炎者按常规行根管治疗术;并发牙髓炎者行去髓术或失活后去髓,再行根管充填; Wedge-shaped defect is a common non-carious dental hard tissue defect. In recent years, we used root canal nail-amalgam filling combined with repair method to treat severe wedge-shaped defect of premolar and achieved satisfactory clinical results. Root pulp necrosis, gangrene and have formed a sharp periapical routine root canal therapy; concurrent pulp demyelination or demyelination to the pulp, and then root canal filling;