Hospital of Stomatology, Sun Yat-sen University; Guangdong Provincial Key Laboratory of Stomatology; Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, 510055, People's Republic of China.
Department of Stomatology, Shenzhen Baoan Maternal and Child Health Hospital, Jinan University, Shenzhen, 518106, People's Republic of China.
BMC Med Imaging. 2022 Mar 29;22(1):56. doi: 10.1186/s12880-022-00782-w.
To establish the three-dimensional facial soft tissue morphology of adolescent and adult females in the Guangdong population and to study the morphological characteristics of hyperdivergent skeletal class II females in Guangdong compared with that of normodivergent class I groups.
The 3dMDface system was used to capture face scans of 160 patients, including 45 normal and 35 hyperdivergent skeletal class II adolescents (aged 11-14 years old) and 45 normal and 35 hyperdivergent skeletal class II adults (aged 18-30 years old). Thirty-two soft tissue landmarks were mapped, and 21 linear, 10 angular and 17 ratio measurements were obtained by 3dMDvultus analysis software. Data were assessed with a t-test of two independent samples between the normal adolescent and adult groups and between the normal and hyperdivergent skeletal class II groups.
The linear measurements of the Guangdong adult females were larger than those of the adolescents in both Class I and Class II groups. However, the angular and ratio measurements had no significant difference. The vertical linear measurements were higher and the sagittal and transverse linear measurements were smaller in the hyperdivergent class II group (p < 0.05). The soft tissue ANB angle, chin-lip angle, and mandibular angle were significantly larger and the soft tissue facial convexity angle and nasal convexity angle were significantly smaller in the hyperdivergent class II group (p < 0.05). Additionally, there were significant differences in the ratio measurements between the hyperdivergent class II groups and the control groups (p < 0.05).
The three-dimensional facial morphology of Guangdong adolescent and adult females was acquired. The facial soft tissue measurements of the adults were higher in the three dimensions except for the facial convexity and proportional relationships which were similar, suggesting that the growth pattern remained the same. The three-dimensional facial soft tissue features of hyperdivergent skeletal class II were characterized by the terms "long, convex, and narrow". Three-dimensional facial measurements can reflect intrinsic hard tissue characteristics.
建立广东人群青少年和成年女性的三维面部软组织形态，并研究广东地区高角骨性Ⅱ类女性与正常均角Ⅰ类女性之间的形态特征。
使用 3dMDface 系统采集 160 例患者的面部扫描，包括 45 例正常均角Ⅰ类青少年（11-14 岁）和 35 例高角骨性Ⅱ类青少年，以及 45 例正常均角Ⅰ类成年人（18-30 岁）和 35 例高角骨性Ⅱ类成年人。标记 32 个软组织标志点，通过 3dMDvultus 分析软件获得 21 项线性、10 项角度和 17 项比值测量值。采用两独立样本 t 检验对正常青少年组和成年组、正常组和高角骨性Ⅱ类组之间的数据进行评估。
在Ⅰ类和Ⅱ类中，广东成年女性的线性测量值均大于青少年。但角度和比值测量值无显著差异。高角骨性Ⅱ类组垂直向线性测量值较高，矢状向和横向线性测量值较小（p<0.05）。高角骨性Ⅱ类组软组织 ANB 角、唇颏角和下颌角较大，软组织面凸角和鼻凸角较小（p<0.05）。此外，高角骨性Ⅱ类组与对照组的比值测量值也存在显著差异（p<0.05）。
获得了广东青少年和成年女性的三维面部形态。成年人的三维面部软组织测量值在三个维度上均高于成年人，除面凸度和比例关系相似外，表明生长模式保持不变。高角骨性Ⅱ类的三维面部软组织特征可概括为“长、凸、窄”。三维面部测量值可反映内在硬组织特征。
