سال انتشار: ۱۳۸۰
محل انتشار: دهمین کنفرانس مهندسی پزشکی ایران
تعداد صفحات: ۷
Hamid Katoozian Ph.D – The Center for Locomotion Studies, The Pennsylvania State University, Park, USA.
Neil Broom Ph.D – Department of Mechanical Engineering, University of Auckland, New Zealand.
Peter Robertson MD FRACS – Department of Orthopaedic Surgery, Auckland Hospital, Auckland, New Zealand.
David I. Simunic – Department of Mechanical Engineering, University of Auckland, New Zealand.
Using a poroelastic finite element (FE) technique and the strain energy density criterion (SED), potential failure sites of lumbar intervertebral discs (IVD) under various loading schemes were investigated. Due to the IVD’s geometric complexity and experimental difficulties, there is a lack of data indicating the internal state of stress and the biomechanical failure potential of the IVD. Using the ABAQUS finite element code and MRI image data, a three-dimensional nonlinear poroelastic FE model of an L2-L3 human disc was constructed. Applied loading schemes included individual energy density criterion was used as the limit condition to investigate the disc failure. This study indicated that the interface between the outer annular layers and endplate (or rim regions) over the anterior and posterior quadrants as well as the central nucleus are al higher risk of failure. This is consistent with clinical and pathological findings.