Contribution of human skin topography to the characterization of dynamic skin tension during senescence: morpho-mechanical approach

14th International Conference on Metrology and Properties of Engineering Surfaces

Zahouani, H.^1 ; Djaghloul, M.^1 ; Vargiolu, R.^1 ; Mezghani, S.^2 ; Mansori, M.E.L.^2

University of Lyon, Laboratory of Tribology and Dynamic of Systems, ENISE-ECL, 36 Avenue Guy de Collongue, 69131 Ecully, France^1

LMPF-EA4106, Arts et Metiers Paris Tech, France^2

关键词: Anisotropy indices;    Elastic fibres;    Langer's lines;    Mechanical tension;    Stratum corneum;    Three dimensional morphology;    Three-dimensional networks;    Three-dimensional structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/483/1/012012/pdf
DOI  :  10.1088/1742-6596/483/1/012012

来源: IOP

【 摘 要 】

The structuring of the dermis with a network of collagen and elastic fibres gives a three-dimensional structure to the skin network with directions perpendicular and parallel to the skin surface. This three-dimensional morphology prints on the surface of the stratum corneum a three dimensional network of lines which express the mechanical tension of the skin at rest. To evaluate the changes of skin morphology, we used a three-dimensional confocal microscopy and characterization of skin imaging of volar forearm microrelief. We have accurately characterize the role of skin line network during chronological aging with the identification of depth scales on the network of lines (z ≤ 60μm) and the network of lines covering Langer's lines (z > 60 microns). During aging has been highlighted lower rows for elastic fibres, the decrease weakened the tension and results in enlargement of the plates of the microrelief, which gives us a geometric pertinent indicator to quantify the loss of skin tension and assess the stage of aging. The study of 120 Caucasian women shows that ageing in the volar forearm zone results in changes in the morphology of the line network organisation. The decrease in secondary lines (z ≤ 60 μm) is counterbalanced by an increase in the depth of the primary lines (z > 60 μm) and an accentuation of the anisotropy index.