Abstract:

The lip and perioral skin aging was evaluated by the fast optical in vivo topometry of human skin （referred to as AEVA-HE）. In the experiment, 20 eligible healthy female volunteers were selected to participate in the test. The volunteers were divided into a youth group and an elderly group, and each with 10 people. Based on the fast optical in vivo topometry of human skin technology, the 3D topography of all volunteers’ skin of lip and perioral skin was collected, and the physiological parameters of the lip and perioral skin were measured, and the skin texture and morphological changes were also statistically analyzed. The perioral wrinkles: compared with the elderly group, the youth group’s perioral skin is more delicate, and the results of wrinkles’ roughness （Ra, Rz） show significant difference by statistics analysis （P<0.05）. The wrinkles of lower lip: as for comparing the wrinkles of lower lip between the youth and the elderly groups, the parameters of skin smoothness （Stm, Sa） show no significant difference. However, from the data trend and 3D topography, it is observed that the elderly group performs worse. The wrinkles of lip corners: the lip corner wrinkles’ roughness, wrinkle depth, volume and area were compared between the youth group and the elderly group. The results of wrinkles’ roughness and mean depth show significant difference by statistics analysis （P<0.05）. The morphological change of lip: the results show that the youth group has plump lips combined with the parameters of positive volume, positive area and 3D topography. But no significant difference is shown between the youth group and the elderly group. This study shows that the AEVA-HE system can characterize the changes in the skin texture and morphology of the lips and perioral skin’s aging through the objective data and 3D topography, which will provide strong technical support for cosmetic companies and research institutions.

Key words: fast optical in vivo topometry of human skin, lip aging, 3D topography