口腔疾病防治2025，Vol.33Issue(9)：784-791,8.DOI:10.12016/j.issn.2096-1456.202550069
精准牙冠延长术在二次美学修复中的应用1例及文献回顾
Secondary aesthetic restoration of tetracycline-stained teeth with incongruous gingival margins by digitally guided precision crown lengthening:a case report and literature review
摘要
Abstract
Objective To evaluate the clinical efficacy of digitally guided precision crown lengthening in second-ary aesthetic rehabilitation cases,and to provide a clinical reference for digitally guided crown lengthening procedures and secondary aesthetic restorations.Methods We present a case of a patient with tetracycline-stained teeth,partial detachment of anterior resin veneers,and gingival margin discrepancies.The patient underwent digitally guided preci-sion crown lengthening followed by secondary aesthetic rehabilitation.Multimodal data,including intraoral,facial,and CBCT scans,were integrated to construct a four-dimensional virtual patient model(incorporating teeth,face,bone,and occlusion)for surgical planning and 3D-printed guide fabrication.Secondary aesthetic restoration was performed after achieving stable post-surgical outcomes.Based on this case,we conducted a detailed analysis and reviewed relevant lit-erature on crown lengthening in secondary aesthetic rehabilitation.Results The gingival contour of the anterior teeth exhibited significant improvement,with enhanced symmetry and stable gingival margin positioning that closely matched the preoperative design.The crown lengthening procedure demonstrated high precision,and the final outcome was aes-thetic and functional.Literature review indicated that secondary restorations frequently present challenges such as gingi-val contour discrepancies and inflammation.Aesthetic crown lengthening in the anterior region should optimize both soft and hard tissue morphology to meet aesthetic standards,with digital technology improving procedural accuracy.Conclusion Precision crown lengthening effectively addresses gingival margin discrepancies in secondary aesthetic rehabilitation,ensuring stable gingival positioning and superior aesthetic outcomes.This approach is particularly suit-able for cases with high aesthetic demands.关键词
精准牙冠延长术/二次美学修复/四环素牙/面部扫描/口内扫描/虚拟患者/数字化微笑设计/数字化导板Key words
precise crown lengthening/secondary aesthetic restoration/tetracycline teeth/facial scanning/intraoral scan/virtual patient/digital smile design/digital guide分类
医药卫生引用本文复制引用
凌慧玲,孙吉宇,任薇,岳莉,阮毅峰,秦子琪,甘雪琦..精准牙冠延长术在二次美学修复中的应用1例及文献回顾[J].口腔疾病防治,2025,33(9):784-791,8.基金项目
四川省科技计划项目(2023YFS0244) This study was supported by the grants from Science and Technology Program of Sichuan Province(No.2023YFS0244) （2023YFS0244）
