Altered load transfer in the pelvis in the presence of periprosthetic osteolysis
Date
2014
Authors
Munro, J.
Fernandez, J.
Millar, J.
Walker, C.
Howie, D.
Shim, V.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Journal of Biomechanical Engineering, 2014; 136(11):114502-1-114502-7
Statement of Responsibility
Jacob T. Munro1, Justin W. Fernandez, James S. Millar, Cameron G. Walker, Donald W. Howie and Vickie B. Shim
Conference Name
Abstract
Periprosthetic osteolysis in the retroacetabular region with cancellous bone loss is a recognized phenomenon in the long-term follow-up of total hip replacement. The effects on load transfer in the presence of defects are less well known. A validated, patient-specific, 3D finite element (FE) model of the pelvis was used to assess changes in load transfer associated with periprosthetic osteolysis adjacent to a cementless total hip arthroplasty (THA) component. The presence of a cancellous defect significantly increased (p < 0.05) von Mises stress in the cortical bone of the pelvis during walking and a fall onto the side. At loads consistent with single leg stance, this was still less than the predicted yield stress for cortical bone. During higher loads associated with a fall onto the side, highest stress concentrations occurred in the superior and inferior pubic rami and in the anterior column of the acetabulum with larger cancellous defects.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
© 2014 ASME The American Society of Mechanical Engineers