Reihsner R, Balogh B, Menzel E J
Ludwig Boltzmann Institute of Plastic and Reconstructive Surgery, University of Vienna, Austria.
Med Eng Phys. 1995 Jun;17(4):304-13. doi: 10.1016/1350-4533(95)90856-7.
The two-dimensional biomechanical behaviour and the collagen content of human skin samples from different anatomical sites was examined. The axes of minimum and maximum shrinkage after excision were determined and correlated with the 'Langer' cleavage lines. Test equipment was developed to restore the original geometry and to measure the loads acting perpendicular to the circumference of the skin specimens. These loads were normalized with respect to the thickness and collagen content and considered as the in vivo tension generated by the surrounding skin area. Using the in vivo geometry of the specimen as reference a set of incremental strains was applied. After stress relaxation was completed the final values of stresses were recorded and related to the incremental strains. The two-dimensional stress-strain relationship was the basis for the evaluation of the incremental elastic moduli. Orthotropic mechanical behaviour was found mainly in regions of reduced in vivo tension. The relationship between the degree of anisotropy at the in vivo configuration and the morphological structure is discussed.
对来自不同解剖部位的人体皮肤样本的二维生物力学行为和胶原蛋白含量进行了检测。确定了切除后最小和最大收缩轴，并将其与“朗格”分裂线相关联。开发了测试设备以恢复原始几何形状并测量垂直于皮肤标本圆周作用的载荷。这些载荷根据厚度和胶原蛋白含量进行归一化，并被视为周围皮肤区域产生的体内张力。以标本的体内几何形状为参考，施加一组增量应变。在应力松弛完成后，记录应力的最终值并将其与增量应变相关联。二维应力-应变关系是评估增量弹性模量的基础。正交各向异性力学行为主要在体内张力降低的区域发现。讨论了体内构型的各向异性程度与形态结构之间的关系。
