root canal broach

例句：

1. 1.The dentist used a root canal broach to remove the infected tooth.
   牙医使用根管钻来去除感染的牙齿。
2. 2. The procedure involves drilling a hole in the root canal and inserting a tool to remove the infection.
   该过程包括在根管中钻孔并插入工具以去除感染。
3. 3.The patient was anxious about the procedure, but the dentist assured her that it would be over quickly with a root canal broach.
   患者对这个过程感到焦虑，但牙医保证整个过程会很快完成，使用根管钻。