过去我们对牙根尖周广的治疗,按一般疗法需经过3—4次甚至更多次的复诊换药才作根充。这样对来自连队及远道患者的复诊都有一定的困难。为了缩短疗程,减少复诊次数,我科从1977年3月至1978年6月,作了根管治疗一次疗法49例,根充51牙 In the past we treated the root tip sharp wide, according to the general therapy to be 3-4 times or more referral dressing for root filling. This will be from the company and the patients from the remote referrals have some difficulties. In order to shorten the course of treatment, reduce the number of referrals, our department from March 1977 to June 1978, made a root canal therapy in 49 cases, root filling 51 teeth