[摘 要]目的 探讨在上颌前牙牙体缺损修复中应用改良牙冠延长术的临床效果。方法 选取我院2023年1月-2024年3月收治的86例上颌前牙牙体缺损患者为研究对象，随机分对照组和观察组，每组43例。对照组直接予以桩核冠修复，观察组在桩核冠修复前先实施改良牙冠延长术治疗，比较两组修复效果、牙齿美观度及咬合力。结果 观察组修复总有效率为95.35%，高于对照组的81.40%，差异有统计学意义(P<0.05)；观察组牙齿美观Ⅰ类、Ⅱ类占比高于对照组，Ⅲ类、Ⅳ类占比低于对照组，差异有统计学意义(P<0.05)；两组治疗后咬合力高于治疗前，且观察组高于对照组，差异有统计学意义(P<0.05)。结论 改良牙冠延长术在上颌前牙牙体缺损修复中的应用效果确切，可有效改善患者的咬合能力，有助于提升牙齿美观度和修复总有效率，值得临床应用。

    [关键词] 改良牙冠延长术；上颌前牙牙体缺损；桩核冠修复

    [中图分类号] R783.3 [文献标识码] A [文章编号] 1004-4949(2024)15-0019-04

    Application Effect of Modified Crown Lengthening in the Repair of Maxillary Anterior Teeth Defect

    ZHOU Zi-yao

    (Department of Stomatology， the Fourth Affiliated Hospital of Nanjing Medical University， Nanjing 210000， Jiangsu， China)

    [Abstract]Objective To investigate the clinical effect of modified crown lengthening in the repair of maxillary anterior teeth defect. Methods A total of 86 patients with maxillary anterior teeth defect admitted to our hospital from January 2023 to March 2024 were randomly divided into control group and observation group， with 43 patients in each group. The control group was directly treated with post-core crown restoration ......