Asgharlou Milad Ali, Esfehani Mahsa, Tofangchiha Maryam, Javadi Amir, Sheikhdavoodi Nima, Yousefi Zahra, Reda Rodolfo, Testarelli Luca
Student Research Committee, Qazvin University of Medical Sciences, Iran.
Department of Oral and Maxillofacial Medicine, School of Dentistry, Qazvin University of Medical Sciences, Iran.
Dent Med Probl. 2025 Mar-Apr;62(2):255-263. doi: 10.17219/dmp/171501.
Facial characteristics are determined by the thickness of facial soft tissue and parameters of the dentoskeletal system.
The aim of the study was to compare the soft tissue thickness in individuals with different malocclusions, based on their lateral cephalograms.
In this retrospective study, 285 lateral cephalograms of 141 males and 144 females aged between 18 and 40 years were evaluated in the following 4 groups of malocclusions: class I (n = 72); class II division 1 (n = 71); class II division 2 (n = 72); and class III (n = 70). Linear measurements of the soft tissue thickness were obtained at 9 facial midline landmarks. Angular measurements were made by calculating the ANB angle and the inclination angle of upper central incisors. The data was statistically analyzed using the χ2 test, the Shapiro-Wilk test, the t-test, analysis of variance (ANOVA), Tukey's test, and Pearson's correlation.
A comparison of the soft tissue thickness revealed that male subjects demonstrated greater thickness than female subjects. This difference was statistically significant at all points in the skeletal class III individuals (p < 0.05). Different skeletal classes demonstrated significant differences in the soft tissue thickness at the subnasale, stomion, labrale inferius, labiomentale, and menton (p < 0.05).
Males exhibited a greater facial soft tissue thickness than females. A statistically significant difference in the soft tissue thickness was observed among the different skeletal classes, particularly at regions located farther from the underlying bone. The class III individuals revealed an increased upper lip thickness and a decreased lower lip thickness. A decrease in the upper lip thickness and an increase in the lower lip thickness were observed in the class II individuals. This pattern suggests that the underlying skeletal discrepancy is being concealed.
面部特征由面部软组织厚度和牙颌面系统参数决定。
本研究旨在基于头颅侧位片比较不同错牙合畸形个体的软组织厚度。
在这项回顾性研究中，对141名男性和144名年龄在18至40岁之间的女性的285张头颅侧位片进行了评估，这些个体被分为以下4组错牙合畸形：I类（n = 72）；II类1分类（n = 71）；II类2分类（n = 72）；III类（n = 70）。在9个面部中线标志点进行软组织厚度的线性测量。通过计算ANB角和上中切牙倾斜角进行角度测量。使用χ2检验、Shapiro-Wilk检验、t检验、方差分析（ANOVA）、Tukey检验和Pearson相关性分析对数据进行统计学分析。
软组织厚度比较显示，男性受试者的厚度大于女性受试者。在III类骨骼个体的所有测量点，这种差异具有统计学意义（p < 0.05）。不同骨骼类型在鼻下点、口裂点、下唇缘点、唇颏沟点和颏下点的软组织厚度存在显著差异（p < 0.05）。
男性的面部软组织厚度大于女性。在不同骨骼类型之间观察到软组织厚度存在统计学显著差异，特别是在距离下方骨骼较远的区域。III类个体上唇厚度增加，下唇厚度减小。II类个体上唇厚度减小，下唇厚度增加。这种模式表明潜在的骨骼差异被掩盖了。
