Methods dip 2% lidocaine or impede narcosis, use the acuity exonerative plane root slot cut endodontium,after drying overlay thin hydrochloride zinc and than using the zinc phosphate to mount.

方法2%利多卡因浸润或阻滞麻醉,锐利挖管口切牙髓,拭氢氧化钙糊剂覆盖髓面,硬固,覆薄层氧化锌粘固粉,磷酸锌粘固粉封洞。