期刊
ACTA BIOMATERIALIA
卷 8, 期 11, 页码 4123-4129出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.actbio.2012.06.042
关键词
Atomic force microscopy; Skin; Scar tissue; Viscoelasticity; Creep indentation
资金
- University of Bradford, UK
- EPSRC [EP/G042365/1, EP/K004204/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K004204/1, EP/G042365/1] Funding Source: researchfish
Following traumatic injury, skin has the capacity to repair itself through a complex cascade of biochemical change. The dermis, which contains a load-bearing collagenous network structure, is remodelled over a long period of time, affecting its mechanical behaviour. This study examines the nanomechanical and viscoelastic properties of the upper dermis from human skin that includes both healthy intact and scarred tissue. Extensive nanoindentation analysis shows that the dermal scar tissue exhibits stiffer behaviour than the healthy intact skin. The scar skin also shows weaker viscoelastic creep and capability to dissipate energy at physiologically relevant frequencies than the adjacent intact skin. These results are discussed in conjunction with a visual change in the orientation of collagenous fibrils in the scarred dermis compared with normal dermis, as shown by atomic force microscopy imaging. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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