| Title | Age-related mechanical properties of human skin: an in vivo study. | | Author(s) | Escoffier C, de Rigal J, Rochefort A, Vasselet R, Lévêque JL, Agache PG | | Institution | Laboratoires de Recherche de l'OREAL, Aulnay-Sous-Bois, France. | | Source | J Invest Dermatol 1989 Sep; 93(3):353-7. | | MeSH | Adolescent
Adult
Aged
Aging
Biomechanics
Elasticity
Female
Humans
Male
Middle Aged
Skin
Skin Physiology
Stress, Mechanical
| | Abstract | We have investigated in vivo how various viscoelastic parameters that describe the mechanical properties of the human skin may vary with age. Accordingly, we have used a mechanical device that records the torsional extensibility of the skin. When submitted to a low torque, the time-response curve of the skin affords the determination of the immediate extensibility (UE), the immediate recovery (UR), the viscoelastic part of the deformation (UV), the elastic recovery (UR/UE), and the creep relaxation time (tau). Because the skin thickness varies with age and primarily governs the mechanical properties, it was measured through an ultrasound technique at the same sites (forearm) where the torque was applied. The results show that the skin maintains its thickness and extensibility up to the seventh decade as opposed to its elasticity or recovery capacities, which decrease from an early age. The viscous part of the deformation is constant through life, whereas the creep relaxation time decreases linearily with age. Except for skin thickness, no differences in these parameters between men and women were detected. The significance of these results are discussed in terms of structure alterations. The determination of the elastic recovery (UR/UE) appears to be a parameter of choice for illustrating skin aging. | | Language | eng | | Pub Type(s) | Journal Article
| | PubMed ID | 2768836 |
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