在通过运动强身健体的同时，不断增加的口颌系统外伤，尤其是牙外伤也成为非常棘手的问题。
Sports can improve our health, meanwhile, the increasing number of orofacial trauma, especially the number of dental trauma becomes a very serious problem.
年轻恒前牙外伤是儿童口腔科常见病之一，正确判断牙齿的牙髓状态，对于患牙的处理和预后有很大的影响。
Young permanent incisor injury is common in children. Determination of pulp condition has a great influence on the management and prognosis of injured teeth.
目的：评价正畸片段弓技术应用于固定外伤脱位再植牙的效果。
Objective: To evaluate the effectiveness of the segmental arch technique in fixing replanted traumatically avulsed permanent teeth.
方法：72例外伤冠折露髓患牙，采用活髓切断术切断冠部牙髓，保留根髓活力，促进牙根发育。
Methods: 72 teeth with exposed pulps in crown treated by pulpotomy to conserve the vital pulps and promote the growth of roots of teeth.
目的探讨外伤性脱位牙再植患者的护理措施。
Objective: To study the nursing treatments of patients in the reimplanting dislocation tooth with surgical trauma.
方法89例外伤性脱位牙患者（107颗牙）行常规再植术，观察1～5年并总结分析。
Methods 89 cases(107 teeth) were given replantation routine observation and analysis of 1 to 5 years.
方法89例外伤性脱位牙患者（107颗牙）行常规再植术，观察1～5年并总结分析。
Methods 89 cases(107 teeth) were given replantation routine observation and analysis of 1 to 5 years.
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