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%多卡因浸润或阻滞麻醉,挖器平根管口切牙髓,拭干后氢糊剂覆盖根髓面,硬固后,覆薄层锌粘固粉,磷酸锌粘固粉封洞。