title: Transversely isotropic material characterization of the human anterior longitudinal ligament.
abstract: The present work represents the first study to report transversely isotropic material parameters for the human anterior longitudinal ligament (ALL) in the thoraco-lumbar spine. Force-deformation data from multi-axial testing was collected from 30 cadaveric spine test specimens using an anisotropic quarter punch test technique. The experimental data was fit to a commonly used anisotropic soft tissue material model using an FEA system identification technique. The material model correlated well with the experimental response (R(2)≥0.98). The constitutive parameter values, as well as the nonlinear anisotropic stress-strain response of the ALL specimens are reported to facilitate application to biomechanical models (including finite element models) of the spine.
authors: Brigham Young University, Department of Mechanical Engineering, Provo, UT 84602, USA.
authors: Mitchell
authors: M
authors: Hortin
authors: Brigham Young University, Department of Mechanical Engineering, Provo, UT 84602, USA.
authors: Sarah
authors: S
authors: Graham
authors: Brigham Young University, Department of Mechanical Engineering, Provo, UT 84602, USA.
authors: Kara
authors: K
authors: Boatwright
authors: Brigham Young University, Department of Mechanical Engineering, Provo, UT 84602, USA.
authors: Peter
authors: P
authors: Hyoung
authors: Brigham Young University, Department of Mechanical Engineering, Provo, UT 84602, USA. Electronic address: abowden@byu.edu.
authors: Anton
authors: A
authors: Bowden
mesh_terms: D000328:Adult; D016880:Anisotropy; D001696:Biomechanical Phenomena; D005260:Female; D020342:Finite Element Analysis; D006801:Humans; D017846:Longitudinal Ligaments; D008159:Lumbar Vertebrae; D008422:Materials Testing; D055595:Mechanical Phenomena; D013904:Thoracic Vertebrae
keywords: Anisotropic punch test; Anterior longitudinal ligament; Biomechanics; Finite element analysis; Spinal ligaments