名词
中文翻译：根管锉
同义词：
['root canal instrument', 'root canal drill']
例句：
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1. The dentist needs to use a root canal file to clean the infected tooth.
牙医需要使用根管锉来清理感染的牙齿。
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2. During the root canal procedure, the dentist uses a root canal file to remove the infectedpulp.
在根管治疗过程中，牙医使用根管锉去除感染的牙髓。
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3. The patient was given a root canal file to help him feel more comfortable during the procedure.
患者被给予一根根管锉，以帮助他在治疗过程中感到更舒适。