Department of Nuclear Power & Energy Safety Engineering, University of Fukui, Fukui, Japan.
Skin Res Technol. 2012 Nov;18(4):495-503. doi: 10.1111/j.1600-0846.2011.00598.x. Epub 2012 Jan 11.
BACKGROUND/PURPOSE: Does the morphology of wrinkles alter gradually with aging or suddenly at a certain age? On the basis of the theoretic wrinkle simulation of ideal skin, we have suggested that the wrinkle morphology suddenly changes from stratum corneum wrinkling to epidermis wrinkling; the former induces shallow fine furrows, and the latter induces deep prominent wrinkles. To examine the existence of drastic change in wrinkling morphology, we developed a new measurement system for facial skin wrinkling test.
The mechanical compression test of facial skin was carried out for 102 Japanese women aged 25-56 years. The test was performed on the right temple area skin, and the area of wrinkles induced by the compression was measured using a digital video camera. The rate of increase in wrinkle area during compression was defined as the skin wrinkling rate, and it was calculated for all subjects automatically by image processing.
The test results showed that the skin wrinkling rate underwent a step increase at the age 33, which means that the wrinkling morphologies of young and old skins are completely different, and so it changes suddenly in the early 30s.
A new skin measurement system was developed to validate our theory of wrinkle formation mechanism with aging. The results demonstrated the wrinkling morphology changes suddenly at early 30s.
背景/目的：皱纹的形态是随着年龄的增长逐渐变化，还是在某个特定年龄突然变化？基于理想皮肤的皱纹模拟理论，我们提出皱纹形态会突然从角质层皱纹变为表皮皱纹；前者导致浅而细的皱纹，后者导致深而明显的皱纹。为了验证皱纹形态是否存在急剧变化，我们开发了一种新的面部皮肤皱纹测试测量系统。
对 102 名 25-56 岁的日本女性进行面部皮肤机械压缩测试。测试在右太阳穴区域皮肤进行，使用数字摄像机测量压缩引起的皱纹面积。压缩过程中皱纹面积的增加率定义为皮肤皱纹率，通过图像处理自动计算所有受试者的皮肤皱纹率。
测试结果表明，皮肤皱纹率在 33 岁时出现了阶跃式增加，这意味着年轻和老年皮肤的皱纹形态完全不同，因此在 30 岁出头时会突然发生变化。
开发了一种新的皮肤测量系统来验证我们的皱纹形成机制理论随年龄的变化。结果表明，皱纹形态在 30 岁出头时突然发生变化。
