Format

Send to

Choose Destination
See comment in PubMed Commons below
J Biomech. 2012 Feb 2;45(3):602-4. doi: 10.1016/j.jbiomech.2011.11.058. Epub 2012 Jan 5.

The transport of wear particles in the prosthetic hip joint: a computational fluid dynamics investigation.

Author information

1
Department of Orthopaedic Surgery, Hospital of the Ludwig-Maximilians-University of Munich, Germany. Andreas.Hoelzer@med.uni-muenchen.de

Abstract

The joint fluid mechanics and transport of wear particles in the prosthetic hip joint were analyzed for subluxation and flexion motion using computational fluid dynamics (CFD). The entire joint space including a moving capsule boundary was considered. It was found that particles suspended in the joint space are drawn into the joint gap between prosthesis cup and head during subluxation, which was also documented by Lundberg et al. (2007; Journal of Biomechanics 40, 1676-1685), however, wear particles remain in the joint gap. Wear particles leave the joint gap during flexion and can finally migrate to the proximal boundaries including the acetabular bone, where the particle deposition can cause osteolysis according to the established literature. Thus, the present study supports the theory of polyethylene wear particle induced osteolysis of the acetabular bone as a major factor in the loosening of hip prosthesis cups.

PMID:
22226406
DOI:
10.1016/j.jbiomech.2011.11.058
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center