Department for Hand, Plastic and Aesthetic Surgery, Ludwig-Maximilian University, Munich, Germany.
Ludwig-Maximilian University, Munich, Germany.
Aesthet Surg J. 2022 Jan 1;42(1):1-9. doi: 10.1093/asj/sjab152.
Our understanding of the functional anatomy of the face is constantly improving. To date, it is unclear whether the anatomic location of the line of ligaments has any functional importance during normal facial movements such as smiling.
The authors sought to identify differences in facial movements between the medial and lateral midface by means of skin vector displacement analyses derived from 3-dimensional (3D) imaging and to further ascertain whether the line of ligaments has both a structural and functional significance in these movements.
The study sample consisted of 21 healthy volunteers (9 females and 12 males) of Caucasian ethnic background with a mean age of 30.6 (8.3) years and mean BMI of 22.57 (2.5) kg/m2. 3D images of the volunteers' faces in repose and during smiling (Duchenne type) were taken. 3D imaging-based skin vector displacement analyses were conducted.
The mean horizontal skin displacement was 0.08 (2.0) mm in the medial midface (lateral movement) and was -0.08 (1.96) mm in the lateral midface (medial movement) (P = 0.711). The mean vertical skin displacement (cranial movement of skin toward the forehead/temple) was 6.68 (2.4) mm in the medial midface, whereas it was 5.20 (2.07) mm in the lateral midface (P = 0.003).
The results of this study provide objective evidence for an antagonistic skin movement between the medial and lateral midface. The functional boundary identified by 3D imaging corresponds to the anatomic location of the line of ligaments.
我们对面部功能解剖结构的理解在不断提高。迄今为止，在正常面部运动（如微笑）中，韧带线的解剖位置是否具有功能重要性尚不清楚。
作者通过 3 维（3D）成像的皮肤向量位移分析，旨在比较面部中面部内侧和外侧的运动差异，并进一步确定在这些运动中，韧带线是否具有结构和功能意义。
研究对象为 21 名健康的白种人志愿者（9 名女性和 12 名男性），平均年龄为 30.6（8.3）岁，平均 BMI 为 22.57（2.5）kg/m2。志愿者在休息和微笑（杜兴型）时拍摄面部的 3D 图像。进行基于 3D 成像的皮肤向量位移分析。
内侧中面部的平均水平皮肤位移为 0.08（2.0）mm（外侧运动），而外侧中面部的平均水平皮肤位移为-0.08（1.96）mm（内侧运动）（P=0.711）。内侧中面部的平均垂直皮肤位移（朝向额头/太阳穴的皮肤颅侧运动）为 6.68（2.4）mm，而外侧中面部的平均垂直皮肤位移为 5.20（2.07）mm（P=0.003）。
本研究的结果为内侧和外侧中面部之间拮抗皮肤运动提供了客观证据。3D 成像确定的功能边界与韧带线的解剖位置相对应。
