儿童50 颗恒牙再植后的回顾性研究

目的:分析再植牙的预后及影响预后的相关因素,观察再植后牙根吸收出现时间及影响因素.方法:对2000～2006 年于北京大学口腔医学院儿童口腔科注册的系统病历中,观察期≥6 个月的全脱位牙再植病历进行回顾性研究,记录患者及再植牙信息.应用卡方检验和生存分析(cox regression)进行统计学分析.结果:符合纳入标准的外伤病历39 份,涉及再植牙50 颗.牙周膜愈合的发生率为18%,牙根吸收发生率为82%,替代性吸收是最常见的牙周组织预后形式(64%).牙根发育情况和保存方式与牙周组织预后具有显著相关性;牙根发育情况、牙髓治疗时机可以影响牙根吸收出现的时间(P<0.05).结论:替代性吸收是再植牙最常见的牙周组织预后形式.再植牙牙根发育情况和保存方式与牙周组织预后具有显著相关性.牙根发育情况、牙髓治疗时机可以影响牙根吸收出现的时间.

A retrospective study of 50 replanted permanent teeth in children

Objective:To analyze the prognosis of replanted permanent teeth in children and associated factors. To determine the onset time of root resorption and related factors. Methods: Clinical data of replanted teeth treated in Department of Pediatric Dentistry, Peking University, School and Hospital of Stomatology, from January 2000 to December 2006,were collected, and the follow-up period was no less than six months. The Fisher's exact test and cox regression were used for statistical analysis. Results: The study comprised of 39 patients with 50 replanted permanent teeth. The periodontium healing rate was 18%, while root resorption rate was 82%. Replacement resorption was the most common type of root resorption (64%).The factors significantly affecting periodontium healing were stage of root development and storage of avulsed teeth.Stage of root development and the time of endodontic treatment significantly affected the onset time of root resorption(P<0.05). Conclusion: Replacement resorption is the most common type of root resorption. The factors significantly affecting periodontium healing are stage of root development and storage of avulsed teeth. Stage of root development and the time of endodontic treatment significantly affect the onset time of root resorption.