口腔医学研究

口腔医学研究 ›› 2021, Vol. 37 ›› Issue (8): 696-701.DOI: 10.13701/j.cnki.kqyxyj.2021.08.006

• 口腔正畸学研究 • 上一篇    下一篇

不同下唇上缘曲线对前牙微笑弧美观性的影响研究

丁弘1, 王伟2, 徐宏1,3, 修霞4, 姜春苗1,3*   

  1. 1. 青岛大学附属医院口腔正畸科 山东 青岛 266000;
    2. 青岛市黄岛区人民医院口腔医疗中心 山东 青岛 266000;
    3. 青岛大学口腔医学院 山东 青岛 266000;
    4. 青岛市黄岛区中心医院口腔科 山东 青岛 266000
  • 发布日期:2021-08-11
  • 作者简介:丁弘(1978~ ),女,山东青岛人,本科,主管护师,研究方向:正畸微笑美学的研究。
  • 基金资助:
    青岛大学医学部“临床+X”工程教学项目(编号:30702180016)

Effects of Upper Curvature of Lower Lip on Smile Arc Esthetics

DING Hong1, WANG Wei2, XU Hong1,3, XIU Xia4, JIANG Chunmiao1,3*   

  1. 1. Department of Orthodontics, the Affiliated Hospital of Qingdao University. Qingdao 266000, China;
    2. Dental Medical Center, Qingdao West Coast New Area People's Hospital, Qingdao 266000, China;
    3. School of Stomatology, Qingdao University, Qingdao 266000, China;
    4. Department of Stomatology, Qingdao West Coast New Area Central Hospital, Qingdao 266000, China
  • Published:2021-08-11

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摘要： 目的: 研究不同下唇上缘曲线形态在正畸结束患者中的分布比例及不同微笑弧曲度对V形和梯形下唇上缘曲线患者微笑美观性的影响。方法: 纳入300名正畸矫治结束患者,统计不同下唇上缘曲线形态的分布比例;采用视觉模拟量表法形成不同上颌中切牙与侧切牙垂直距离及不同下唇上缘曲线的组合微笑图,由正畸医生、口腔修复医生和普通人对组合图片的美观性进行评价及比较。结果: 圆缓形、V形和梯形下唇上缘曲线的患者比例分别是54.7%、23.3%和23.0%。对于V形下唇上缘曲线的患者,3组评价者均认为2 mm的上颌中切牙及侧切牙切缘垂直距离差的微笑是最美观的。对梯形下唇上缘曲线的患者,正畸医生和普通人选择曲度较平的微笑弧。结论: 正畸医生在制定矫治方案时应充分考虑下唇上缘曲线形态对微笑弧美观性的影响,为患者制定个性化的微笑弧。对于V形下唇上缘曲线患者,不可随意压低其上颌前牙,微笑弧曲线可稍深一些,梯形下唇上缘曲线的患者微笑弧建议稍平一些。

关键词: 微笑弧, 下唇曲线, 美观性, 正畸, 小组评价

Abstract: Objective: To study the proportion of patients with different upper curvatures of lower lip at the end of orthodontic treatment and the effect of different curvatures of smile arc on the smile esthetics in patients with V-shaped or trapezoidal upper curvature of lower lip. Methods: 300 patients were included in this study, and the distribution of different upper curvatures of lower lip was calculated. Different vertical distances between the central incisor and lateral incisor and different upper curvatures of lower lip were combined and compared by orthodontists, prosthodontists, and laypersons. Results: The proportion of patients with round, V-shaped, and trapezoidal upper curvature of lower lip was 54.7%, 23.3%, and 23.0%. For patients with V-shaped upper curvature of lower lip, the evaluators chose smile arc with 2mm vertical distance of the incisor edge between central and lateral incisors, while for the patients with trapezoidal upper curvature of lower lip, smile arc with flat curvature was chosen. Conclusion: The influence of upper curvature of lower lip on the smile arc esthetics should be fully considered when orthodontists make the treatment plan. For the patients with V-shaped upper curvature of lower lip, it should be cautious to intrude the maxillary anterior teeth, while for the patients with trapezoidal upper curvature, flat smile arc is recommended.

Key words: smile arc, lower lip curvature, esthetics, orthodontics, group assessment