Department of Orthodontics and Dentofacial Orthopaedics, Saraswati Dental College, Lucknow, India.
Department of Orthodontics and Dentofacial Orthopaedics, Saraswati Dental College, Lucknow, India.
Am J Orthod Dentofacial Orthop. 2022 Jun;161(6):e571-e579. doi: 10.1016/j.ajodo.2022.03.005. Epub 2022 Apr 6.
The aim of this study was to measure the dimensions of the select facial muscles and correlate them with different types of smiles.
The study group included 30 South Asian adults (17 men and 13 women) aged between 24 and 30 years divided into 3 groups of 10 subjects each according to Rubin's classification of smile. The zygomaticus major, levator labii superioris, depressor anguli oris, and mentalis muscles were ultrasonographically evaluated. The length and thickness of the muscles were measured bilaterally. The data obtained were analyzed statistically.
The maximum mean value thickness of the zygomaticus major was found in the canine smile group. The maximum mean value thickness of the depressor anguli oris and mentalis was seen in the full denture smile group. However, the thickness of the levator labii superioris muscle was similar between the different smile groups. There was no significant difference in the measurements of the length of the muscles between the right and the left sides.
This study did not find any statistically significant correlation between the type of smiles described in Rubin's classification and the dimensions of the associated facial muscle.
本研究旨在测量特定面部肌肉的维度，并将其与不同类型的微笑相关联。
研究组包括 30 名南亚成年人（17 名男性和 13 名女性），年龄在 24 至 30 岁之间，根据鲁宾的微笑分类分为 3 组，每组 10 名受试者。使用超声评估颧大肌、上唇提肌、口角降肌和颏肌。双侧测量肌肉的长度和厚度。对获得的数据进行统计学分析。
在犬齿微笑组中，发现颧大肌的最大平均厚度值最高。在全口义齿微笑组中，口角降肌和颏肌的最大平均厚度值最高。然而，不同微笑组之间上唇提肌的厚度相似。肌肉长度的测量值在右侧和左侧之间没有显著差异。
本研究未发现鲁宾分类中描述的微笑类型与相关面部肌肉的维度之间存在任何统计学上显著的相关性。
