Document Detail


Finite element analysis of the ovine hip: development, results and comparison with the human hip.
MedLine Citation:
PMID:  22534728     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Objectives: The ovine hip is often used as an experimental research model to simulate the human hip. However, little is known about the contact pressures on the femoral and acetabular cartilage in the ovine hip, and if those are representative for the human hip. Methods: A model of the ovine hip, including the pelvis, femur, acetabular cartilage, femoral cartilage and ligamentum transversum, was built using computed tomography and micro-computed tomography. Using the finite element method, the peak forces were analysed during simulated walking. Results: The evaluation revealed that the contact pressure distribution on the femoral cartilage is horseshoe-shaped and reaches a maximum value of approximately 6 MPa. The maximum contact pressure is located on the dorsal acetabular side and is predominantly aligned in the cranial-to-caudal direction. The surface stresses acting on the pelvic bone reach an average value of approximately 2 MPa. Conclusions: The contact pressure distribution, magnitude, and the mean surface stress in the ovine hip are similar to those described in the current literature for the human hip. This suggests that in terms of load distribution, the ovine hip is well suited for the preclinical testing of medical devices designed for the human hip.
Authors:
F Mazoochian; A Hölzer; J Jalali; F Schmidutz; C Schröder; M Woiczinski; J Maierl; P Augat; V Jansson
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-25
Journal Detail:
Title:  Veterinary and comparative orthopaedics and traumatology : V.C.O.T     Volume:  25     ISSN:  0932-0814     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8906319     Medline TA:  Vet Comp Orthop Traumatol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Dr. Andreas Hölzer, Department of Orthopaedic Surgery, University of Munich (LMU), Campus Grosshadern, Marchioninistrasse 15,, 81377 Munich, Germany, Phone: +49 89 7095 4861, Fax: +49 89 7095 4863, E-mail: Andreas.Hoelzer@med.uni-muenchen.de.
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