[摘 要]目的 观察根内固位体联合冠外固位体修复后牙大部分牙体缺损的效果。方法 选取2018年1月-2023年4月于我院行修复治疗的120例后牙大部分牙体缺损患者为研究对象，采用随机数字表法分为参照组和研究组，各组60例。参照组采用冠外固位体修复，研究组采用根内固位体联合冠外固位体修复，比较两组临床效果、牙周健康评分、疼痛(VAS)评分、牙体表面缺损评分。结果 研究组治疗总有效率为96.67%，高于参照组的83.33%(P<0.05)；两组治疗后牙周健康评分均低于治疗前，且研究组低于参照组(P<0.05)；两组治疗后牙体表面缺损评分均低于治疗前，且研究组低于参照组(P<0.05)；两组治疗6、24 h后VAS评分均低于治疗前，且研究组低于参照组(P<0.05)。结论 根内固位体联合冠外固位体修复后牙大部分牙体缺损的效果确切，可减轻患者疼痛，改善牙周健康，降低牙体缺损评分，是一种有效的联合治疗方案。

    [关键词] 冠外固位体；后牙牙体缺损；根内固位体

    [中图分类号] R783.3 [文献标识码] A [文章编号] 1004-4949(2024)12-0087-04

    Effect of Root Internal Retainer Combined with Crown External Retainer on the Repair of Most Posterior Tooth Defect

    LIU Xi-zhang

    (Fangchenggang First People’s Hospital， Fangchenggang 538021， Guangxi， China)

    [Abstract]Objective To observe the effect of root internal retainer combined with crown external retainer on the repair of most posterior tooth defect. Methods A total of 120 patients with most posterior tooth defect who underwent repair treatment in our hospital from January 2018 to April 2023 were selected as the research objects. They were divided into reference group and study group by random number table method ......