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目的:简化后牙牙体缺损的修复治疗操作,提高修复质量,降低医疗成本.方法:选择需要进行全冠修复的磨牙残根残冠病例98例.结果:经过2年的随访观察,98例银汞合金—根管钉桩核用于后牙牙体缺损的修复均获得成功,效果满意.结论:采用银汞合金—根管钉桩核修复后,后牙残根残冠均能达到满意的效果,且操作简便,费用低廉.“,”AM:Simplified repair treatment of posterior tooth defect operation, improve the quality of repair, reduce health care costs.METHODS:Select require a ful Crown restoration of molar residual roots and crowns 98 cases.RESULTS: After 2 years of folow-up, 98 cases of root canal nail amalgam-post and core of posterior tooth defect repair is successful, satisfied with the.CONCLU SION: Amalgam-after root canal nail post-core, posterior teeth residual root and residual Crown were able to achieve satisfactory results, and easy to operate, inexpensive.