The diameter of dentinal tubule was not uniform due to peritubular dentine was demineralize.

横剖面见牙本质小管口因脱矿不规则。

With certain shapes of or canula, elongated caps are made to cover both canula and threaded portion, and seal the canula at its top.

根据管口和导管的不同形状，可以制造细长的管盖以盖导管和螺纹部分，并在顶部封住导管。

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.

方法用2%利多卡因浸润麻醉,用锐利挖器平根管口切断牙髓,拭干后用氢氧化钙糊剂盖根髓断面,硬固后,薄层氧化锌粘固粉,用磷酸锌粘固粉封洞。