活髓切断术是口腔科常用的治疗方法，目前治疗多采用冠髓全切术，同时局切除根管口处部分根髓。该疗法主要适应证为年青恒牙，目的使牙根继续形成。近年来，我们采用二种活髓切断方法，切断的髓面覆盖人工骨和胎儿——羟基磷灰石复合骨，并对二种方法进行了比较，现报道如下。l Medulotomy is a commonly used method of stomatology treatment, the current treatment of the use of total coronallotomy, resection of the root canal at the same time part of the root marrow. The main indications for this therapy are young permanent teeth, the purpose of which is to continue the formation of the root. In recent years, we use two kinds of pulpotomy method, cut the medullary covered artificial bone and fetal hydroxyapatite composite bone, and the two methods were compared, are reported below. l