【摘要】 目的 分析拔除导致邻牙牙根外吸收（ERR）的埋伏阻生第三磨牙后ERR患牙的预后情况及影响因素。方法 对32例埋伏阻生第三磨牙挤压致ERR的患牙，在拔除阻生第三磨牙后，通过临床症状、电活力测试观察第二磨牙牙髓的预后，根据其预后不同，分为保髓成功组及保髓失败组，比较两组的基本信息（年龄、性别）、患牙部位、牙根吸收类型，分析影响ERR患牙预后的相关因素。结果 下颌ERR患牙保髓成功率（91.67%）高于上颌ERR患牙（62.50%）(P=0.085)，牙根吸收未及髓腔的患牙保髓成功率（100%）高于牙根吸收及髓腔的患牙（70.59%）(P=0.046)，两组间的基本信息比较差异无统计学意义（P>0.05）。结论 当患牙牙根吸收未及牙髓时或患牙位于下颌时，拔除埋伏第三磨牙后ERR患牙预后相对良好，故应尽早拔除已导致ERR发生的埋伏阻生第三磨牙。更多还原

【Abstract】 Objective To analyze the prognosis and influencing factors of external root resorption(ERR)of adjacent teeth after the removal of impacted third molar that caused ERR.Methods Thirty-two cases of impacted third molars with external root resorption caused by compression were treated.After the extraction of the impacted third molars,the prognosis of the pulp of the second molars was observed through clinical symptoms and electrical activity tests.According to their different prognoses,they were divided into a successful pulp preservation group and a failed pulp preservation group.The basic information(age,gender),affected tooth location,and root resorption type of the two groups were compared,and the relevant factors affecting the prognosis of ERR patients were analyzed.Results The success rate of pulp preservation for mandibular ERR patients(91.67%)was higher than that for maxillary ERR patients(62.50%)(P=0.085),and the success rate of pulp preservation for ERR not involving pulp cavity(100%)was higher than that for ERR involving pulp cavity(70.59%)(P=0.046).There was no significant difference in basic information between the two groups(P>0.05).Conclusions When the root resorption of the affected tooth does not reach the pulp or when the affected tooth is located in the lower jaw,the prognosis of the affected tooth after the impacted third molar removed is good. Therefore,the impacted third molar should be removed as soon as possible to prevent ERR from occurring.更多还原