笔者用自制U型卡和银汞合金修复磨牙大面积冠缺损,收到非常满意效果。报告如下。 1 资料与方法选择因龋坏或斜折致牙体硬组织缺损1/2以上的磨牙,X线片示根管通畅无尖因病变,共89人103颗牙。其中女54例,男35例,年龄15岁～58岁。治疗方法:患牙行根管治疗术,2周后无主客观症状,X片示根充良好者,彻底去除龋坏组织和无支持的牙体组织, I use homemade U-shaped card and amalgam to repair large area of ​​the molar defect, received very satisfactory results. The report is as follows. 1 Materials and Methods Selection of teeth due to carious or oblique fracture of the hard tissue defects caused by more than 1/2 of the molar, X-ray showed root canal unobstructed apathetic lesions, a total of 89 103 teeth. 54 cases were female, 35 males, aged 15 years to 58 years. Treatment: Tooth root canal treatment of teeth, 2 weeks after the absence of subjective and objective symptoms, X-ray showed good root filling, complete removal of carious lesions and no supporting tooth tissue,