Micro-ultrasonic technique was used to clean and expand the root canal, and warm vertical technique was employed to fill the root canal.

应用显微根管超声技术清理、扩大根管，热牙胶充填系统进行充填根管。

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Micro-ultrasonic technique was used to clean and expand the root canal, and warm vertical technique was employed to fill the root canal.

应用显微根管超声技术清理、扩大根管，热牙胶充填系统进行充填根管。

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