Mendelson Bryan C, Hartley Winfield, Scott Mark, McNab Alan, Granzow Jay W
Toorak Cosmetic Surgery Centre, 109 Mathoura Road, Toorak, Victoria, Australia 3142.
Aesthetic Plast Surg. 2007 Sep-Oct;31(5):419-23. doi: 10.1007/s00266-006-0120-x.
Aging of the midface is complex and poorly understood. Changes occur not only in the facial soft tissues, but also in the underlying bony structure. Computed tomography (CT) imaging was used for investigating characteristics of the bony orbit and the anterior wall of the maxilla in patients of different ages and genders.
Facial CT scans were performed for 62 patients ranging in age from 21 to 70 years, who were divided into three age groups: 21-30 years, 41-50 years, and 61-70 years. Patients also were grouped by gender. The lengths of the orbital roof and floor and the angle of the anterior wall of the maxilla were recorded on parasagittal images through the midline of the orbit for each patient.
The lengths of the orbital roof and floor at their midpoints showed no significant differences between the age groups. When grouped by gender, the lengths were found to be statistically longer for males than for females. The angle between the anterior maxillary wall and the orbital floor was found to have a statistically significant decrease with advancing age among both sexes.
Bony changes occur in the skeleton of the midcheek with advancing age for both males and females. The anterior maxillary wall retrudes in relation to the bony orbit, which maintains a fixed anteroposterior dimension at its midpoint. These changes should be considered in addressing the aging midface.
面中部的衰老过程复杂且了解甚少。不仅面部软组织会发生变化，其下方的骨骼结构也会改变。本研究利用计算机断层扫描（CT）成像技术，探究不同年龄和性别的患者眼眶骨及上颌骨前壁的特征。
对62例年龄在21至70岁之间的患者进行面部CT扫描，这些患者被分为三个年龄组：21 - 30岁、41 - 50岁和61 - 70岁。患者也按性别分组。通过眼眶中线的矢状位图像，记录每位患者眼眶顶和底的长度以及上颌骨前壁的角度。
眼眶顶和底中点的长度在各年龄组之间无显著差异。按性别分组时，发现男性的长度在统计学上长于女性。男女两性中，随着年龄增长，上颌骨前壁与眶底之间的角度在统计学上均有显著减小。
随着年龄增长，男性和女性面中部骨骼都会发生变化。上颌骨前壁相对于眼眶骨后缩，而眼眶骨中点的前后径保持固定。在处理面中部衰老问题时应考虑这些变化。
