Facial expression under stiff stratum corneum leads to strain concentrations, followed by residual wrinkle formation

ConclusionBecause exposure to dry or humid conditions in the short‐term could affect only stratum corneum mechanics, the present results indicated that stratum corneum could be considered to be responsible for localized strain during facial expressions. This strain is followed by residual wrinkle formation. Accumulation of residual wrinkles will produce permanent wrinkles in the long‐term. Improving the mechanics of stratum corneum might be an effective approach in wrinkle formation prevention.This article is protected by copyright. All rights reserved.

Source: International Journal of Cosmetic Science - May 31, 2016 Category: Dermatology Authors: Yusuke Hara, Tetsuji Hirao, Ichiro Iwai Tags: Original Article Source Type: research