亚砷酸失活剂是牙髓失活的重要制剂，但是牙髓失活时多有疼痛，因此制剂中常加入盐酸可卡因。盐酸可卡因是一种严格控制的麻醉药品不易获取，常因短缺而影响临床治疗。我们采用盐酸达克罗宁替代盐酸可卡因，解决了这个问题。现介绍如下：１对象和方法１．１早期牙髓炎患者 本组 Arsenic trioxide inactivation agent is an important preparation of dental pulp inactivation, but more pain in the inactivation of dental pulp, so formulations often add cocaine hydrochloride. Cocaine hydrochloride is a strictly controlled narcotic drug that is not readily available and often affects clinical treatment due to shortages. We solved this problem by replacing diclofenac hydrochloride with cocaine hydrochloride. Are introduced as follows: 1 objects and methods 1.1 early pulpitis patients in this group