Biomechanical evaluation of human and porcine Auricular cartilage

• DOI: 10.1002/lary.25040
• Publication Date: 2015-04-17T17:50:47Z
• Authors: David A. Zopf; Colleen L. Flanagan; Hassan B. Nasser; Anna G. Mitsak; Farhan S. Huq; Vishnu Rajendran; Glenn E. Green; Scott J. Hollister
• Keywords: Hyperelastic material; Stiffening; Ogden

The mechanical properties of normal auricular cartilage provide a benchmark against which to characterize changes in structure/function due genetic defects creating phenotypic abnormalities collagen subtypes. Such also inputs/targets for reconstruction scaffold design. Several studies report the biomechanical septal, costal, and articular cartilage. However, analogous data are lacking. Therefore, our aim this study was both whole-ear mechanics by mechanically testing specimens fitting results nonlinear constitutive models.Mechanical whole ears punch biopsies.Whole human cadaveric ear biopsies from porcine were subjected helix-down compression quasistatic unconfined tests. Common hyperelastic laws (widely used soft tissue mechanics) evaluated their ability represent stress-strain behavior cartilage.Load displacement curves exhibited compliant linear until after significant where stiffening occurred. All five commonly two-term models successfully fit elastic (mean R(2) >0.95).Auricular exhibits strain-stiffening that is similar other tissues body. with strain at high displacement. constants model fits quantitative baselines (a animal engineering) mechanics.NA