Irvine, Calif.
From the Department of Plastic Surgery, University of California, Irvine.
Plast Reconstr Surg. 2018 May;141(5):1124-1129. doi: 10.1097/PRS.0000000000004341.
The impression that cheek filling results in longitudinal shortening ("lift") of the skin and elevation of the nasolabial crease or nasolabial fold has become common within the facial injection community but remains unsubstantiated.
In this study, 77 patients were evaluated before and after injection of the cheeks with a hyaluronic acid filler using a three-dimensional camera system.
A constant pattern of skin expansion away from the center of the injection and perpendicular to the surface of the skin was observed. A subgroup of 37 patients without differences in their preinjection and postinjection facial expression were analyzed by direct comparison and failed to demonstrate lateral traction (or "pull") on the intervening skin from the cheek injection site to the nasolabial crease. Furthermore, there was no photographic difference in the nasolabial fold or nasolabial crease. The only patients who demonstrated photographic improvement of the medial face were those who had filler placed directly in the transition between the lateral nasolabial fold and cheek (nasojugal crease).
Filling the cheek with 3 cc of volume does not create traction forces or move the skin between the site of injection and the nasolabial crease. It is likely that expanding the nasojugal crease is the direct visual cue that leads to perceived improvement in the nasolabial fold.
在面部注射领域，人们普遍认为颊部填充会导致皮肤纵向缩短（“提升”）和鼻唇沟或鼻唇褶皱的抬高，但这种观点尚未得到证实。
本研究使用三维摄像系统，对 77 例接受透明质酸颊部填充的患者进行了注射前后的评估。
观察到一种恒定的皮肤扩张模式，即远离注射中心并垂直于皮肤表面。对 37 例无注射前后面部表情差异的患者进行了直接比较，结果未能显示来自颊部注射部位到鼻唇沟的皮肤的侧向牵引（或“拉伸”）。此外，鼻唇褶皱或鼻唇沟没有明显差异。仅在直接将填充物放置在外侧鼻唇沟和颊部（鼻颧皱襞）之间过渡区域的患者中，观察到内侧面部的摄影改善。
在颊部注射 3 毫升体积不会产生牵引力量或使注射部位和鼻唇沟之间的皮肤移动。扩张鼻颧皱襞可能是导致鼻唇沟外观改善的直接视觉线索。
