Mazhari Marzie, Rekabi Atefe, Atashkar Nastaran, Khayami Zahra
Department of Orthodontics, Dental School, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Department of Restorative, School of Dentistry, Dental Research Center, Hamadan University of Medical Sciences, Pajouhesh Square, Hamadan, 6517838736, Iran.
Oral Maxillofac Surg. 2025 Jan 14;29(1):33. doi: 10.1007/s10006-025-01336-4.
The harmony between the lips and the chin is an essential parameter in facial esthetics, and the mentolabial sulcus (MLS) represents the level of this harmony. This study aimed to assess the effect of MLS depth on facial profile attractiveness in long-face, short-face, and normal-face Iranian female individuals.
An observational study with a questionnaire was conducted, and a profile photograph of an Iranian female with class I occlusion was altered to create long-face, normal-face and short-face profiles with MLS depth ranging from 1 to 12 mm. Sixty-five lay people and 24 orthodontists rated the attractiveness of images using a 7-point Likert scale. Data were analyzed by independent t-test and Spearman's correlation coefficient using IBM SPSS Ver. 22.
The ideal depth of MLS ranged from 5 to 7 mm for normal-face and short-faced and 6-8 mm for long-face Iranian females. The acceptable MLS depth was found to be up to 8 mm in normal-face and up to 10 mm in long-face and short-face females. normal-face images acquired the maximum score of attractiveness, followed by short-face images, while long-face images were the least attractive according to both observer groups. There was general agreement amongst orthodontists and lay people scoring process; however, orthodontists gave significantly higher scores for normal face images than lay people.
The optimal MLS depth in different facial types should be considered in treatment planning for orthognathic surgery and genioplasty.
嘴唇与下巴之间的协调性是面部美学的一个重要参数，而颏唇沟（MLS）体现了这种协调性的程度。本研究旨在评估颏唇沟深度对长脸、短脸和正常脸型的伊朗女性面部轮廓吸引力的影响。
开展了一项带有问卷的观察性研究，对一名安氏I类咬合的伊朗女性的侧面照片进行修改，以创建颏唇沟深度在1至12毫米之间的长脸、正常脸和短脸侧面轮廓。65名外行人以及24名正畸医生使用7点李克特量表对图像的吸引力进行评分。使用IBM SPSS 22版通过独立样本t检验和斯皮尔曼相关系数对数据进行分析。
对于正常脸型和短脸型的伊朗女性，颏唇沟的理想深度为5至7毫米，对于长脸型女性为6至8毫米。正常脸型女性可接受的颏唇沟深度为8毫米，长脸型和短脸型女性为10毫米。根据两组观察者的评价，正常脸图像的吸引力得分最高，其次是短脸图像，而长脸图像最不具吸引力。正畸医生和外行人在评分过程中总体意见一致；然而，正畸医生对正常脸图像给出的分数明显高于外行人。
在正颌外科手术和颏成形术的治疗计划中，应考虑不同面部类型的最佳颏唇沟深度。
