前牙受不适当外力后牙冠折断是口腔内科常见病。二年来我们用酚醛树脂液封闭根管后再引根充治疗５０例，效果满意。笔者体会为：①酚醛树脂液封闭根管后配合根充大大地缩短了疗程。过去常规治疗根管操作复杂，复诊次数多，在治疗期间易造成根部急性炎症，治疗后由于欠充或... Anterior teeth by improper external force after the crown is a common disease in oral medicine. In the past two years, we used phenolic fluid to close the root canal and then rooted for treatment of 50 cases with satisfactory results. The author of experience: ① phenolic resin fluid closed root canal with root canal greatly shorten the course of treatment. Conventional treatment of conventional root canal operation is complex, the number of referrals and more likely to cause acute inflammation of the root during treatment due to under-filling or ...