上海口腔医学

上海口腔医学 ›› 2025, Vol. 34 ›› Issue (4): 382-386.doi: 10.19439/j.sjos.2025.04.007

• 论著 • 上一篇    下一篇

数字化微笑设计联合激光微创牙冠延长术的疗效及对Liébart微笑线的影响

许莹1,2,3, 刘媛4   

  1. 1.西安交通大学口腔医院 陕西省颅颌面精准医学研究重点实验室, 2.陕西省牙颌疾病临床研究中心, 3.口腔综合科, 陕西 西安 710004;
    4.宝鸡市人民医院 口腔科, 陕西 宝鸡 721000
  • 收稿日期:2024-11-25 修回日期:2025-01-21 出版日期:2025-08-25 发布日期:2025-08-26
  • 通讯作者: 刘媛,E-mail：chongguang66@163.com
  • 作者简介:许莹（1992-）,女,硕士,主治医师,E-mail：13259788689@163.com
  • 基金资助:
    陕西省自然科学基础研究计划项目（2020JQ-562）

Evaluation of the effect of digital smile design combined with minimally invasive laser crown lengthening and its effect on Liébart smile line

Xu Ying1,2,3, Liu Yuan4   

  1. 1. Key Laboratory of Shaanxi Province of Craniofacial Precision Medicine Research, 2. Clinical Research Center of Shaanxi Province for Dental and Maxillofacial Diseases, 3. Department of General Dentistry, College of Stomatology, Xi′an Jiaotong University. Xi′an 710004;
    4. Department of Stomatology, Baoji People's Hospital. Baoji 721000, Shaanxi Province, China
  • Received:2024-11-25 Revised:2025-01-21 Online:2025-08-25 Published:2025-08-26

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摘要： 目的：评价数字化微笑设计联合激光微创牙冠延长术的疗效及对Liébart微笑线的影响。方法：选择2021年1月—2023年5月收治的108例牙冠修复患者,采用随机数字表法分为对照组（n=54,激光微创牙冠延长术）和试验组（n=54,对照组基础上进行数字化微笑设计）。比较两组患者的牙周健康指标、修复体边缘相关距离指标、牙松动度、Liébart微笑线分类及美学标准评分。结果：治疗后6个月,试验组患者的牙菌斑指数 (plaque index,PLI)、探诊深度 (probing depth,PD)、出血指数 (bleeding index,BI)显著低于对照组,修复体边缘至嵴顶距离 (restoration margin to bone crest,RM-BC)、修复体边缘至龈缘距离 (restoration margin to gingival margin,RM-GM)显著高于对照组（P<0.05）。治疗后14 天,试验组患牙松动度显著小于对照组（P<0.05）。治疗后6个月,试验组患者Liébart微笑线分类优于对照组（P<0.05）;试验组患者红色美学评分 (pink esthetic score,PES)、白色美学评分 (white esthetic score,WES)显著高于对照组（P<0.05）。随访1年,试验组不良事件发生率与对照组相比无统计学差异（P>0.05）。结论：数字化微笑设计联合激光微创牙冠延长术能显著改善牙冠修复患者的临床疗效和微笑线美学效果。

关键词: 牙冠延长术, 激光微创, 数字化微笑设计, Liébart微笑线

Abstract: PURPOSE: To evaluate the effect of digital smile design combined with minimally invasive laser crown lengthening and the effect on Liébart smile line. METHODS: From January 2021 to May 2023, a total 108 patients receiving crown restoration treatment were selected and assigned to control group (n=54, receiving laser minimally invasive crown lengthening alone) and experimental group (n=54, receiving digital smile design in addition to the control group's treatment) using a random number table. Periodontal health indicators, restoration margin-related distance indicators, tooth mobility, Liébart smile line classification and aesthetic standard scores were compared between the two groups. RESULTS: Six months after treatment, the plaque index (PLI), probing depth (PD) and bleeding index (BI) of the experimental group were significantly lower than those of the control group. Additionally, the restoration margin to bone crest distance(RM-BC) and restoration margin to gingival margin distance (RM-GM) were significantly higher in the experimental group(P<0.05). Fourteen days after treatment, tooth mobility of the experimental group was significantly less than the control group (P<0.05). Six months after treatment, the Liébart smile line classification was superior in the experimental group (P<0.05);the pink esthetic score (PES) and white esthetic score (WES) of the experimental group were significantly higher than those of the control group(P<0.05). After one year of follow-up, there was no significant difference in the incidence of adverse events between the two groups(P>0.05). CONCLUSIONS: Digital smile design combined with minimally invasive laser crown lengthening can significantly improve the clinical efficacy and aesthetic effect of smile line in patients with crown restoration.

Key words: Crown lengthening, Minimally invasive laser, Digital smile design, Liébart smile line

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