儿童恒前牙冠折后牙髓活力的保存方法

目的：探讨儿童恒前牙冠折后不同受损程度牙髓活力的保存方法。方法：采用三种方法对不同受损程度的72例98个冠折恒前牙牙髓进行处理，并定期复查。结果：对14个单纯性釉质折断牙牙髓随访2年，牙髓活力不受影响；对23个牙本质折断但未露髓患牙护髓后2年成功率为82.6%，对61个牙本质折断并露髓患牙采取活髓切断术，其2年成功率为81.9%。结论：对损伤程度不同的冠折牙牙髓应采取不同的治疗方法；活髓切除术不仅适用于年轻恒牙，对于牙根已形成但仍处于儿童暑期的恒前牙同样适用；牙本质桥的形成并不意味其下方的牙髓组织正常。

Treatment of pulps in crown fractures of anterior permanent teeth

AIM: To study the treatment of pulps in crown fractures of anterior permanent teeth,and to investigate the affecting factors to the pulps. METHODS: 98 anterior permanent teeth of 72 children were collected in this investigation.14 teeth with enamel fractures only were treated by mehtod of blunting the sharp fracture edges.23 teeth with dentin fractures,but without pulp exposure,were protected by calcium hydroxide. 61 teeth with dentin fractures and with pulp exposure were treated by partial pulpotomy.RESULTS: 14 enamel factured teeth had vital pulp after two years retrospect. The success rate of calcium hydroxide placement group was 82.6%,that of the partial pulpotomy was 81.9%. CONCLUSION: Different types of crown fractures should be treated by different methods.Vital pulps were affected by the severity of injuries.Pulpotomy is a successful treatment method for crown fractures with pulp exposure regardless of the maturity of the root. The formation of dentin bridge was one outcome of partial pulpotomy,but does not means that the pulps were healthy.