检视直接复合树脂充填与汞齐充填恒久后牙的效果，主要针对修复术失败。
To examine the effects of direct composite resin fillings versus amalgam fillings for permanent posterior teeth, primarily on restoration failure.
随机对照试验，比较牙齿复合树脂和汞齐充填恒久后牙的效果。
Randomized controlled trials comparing dental resin composites with dental amalgams in permanent posterior teeth.
随机对照试验，比较牙齿复合树脂和汞齐充填恒久后牙的效果。
Randomized controlled trials comparing dental resin composites with dental amalgams in permanent posterior teeth.
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