目的：比较银汞合金与复合树脂修复磨牙残根、残冠的疗效。方法：选取因患龋而成残根、残冠的下颌第一磨牙100个，在根管治疗术后，采用钉固位，分别以银汞合金或复合树脂修复，各50个牙，比较其疗效。追踪复查2年后的治疗效果。结果：银汞合金修复者，优45牙(90%)，一般4牙(8%)，失败1牙(92%)。复合树脂修复者，优40牙(80%)，一般6牙(10%)，失败4牙(8%)。两者成功率χ2检验，P>0.05。结论：银汞合金修复与复合树脂修复残根、残冠的疗效相差无显著性。%AIM：To compare the clinical effects of repairing the residual roots and residual crowns of molar teeth with silver amalgam or composite resin. METHODS: 100 lower first molars with residual roots or residual crowns by caries were chosen. After root canal therapy, pin retention was adopted, 50 were repaired ones with silver amalgam and 50 ones with composite resin. Then compare their clinical effects for two years. RESULTS: The clinical effects of silver amalgam group showed 45 teeth best or better(90%), 4 teeth good(8%), 1 tooth bad(2%). The clinical effects of composite resin group showed 40 teeth best or better (80%), 6 teeth good(10%), 4 teeth bad(8%) Both successful rates were checked by χ2, P>0.05. CONCLUSION: The clinical effects of repairing residual roots and residual crowns silver amalgam or composite resin are no differece obviously.
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