Modeling polyethylene wear acceleration due to femoral head dislocation damage. J Arthroplasty 2014 Aug;29(8):1653-1657.e1
Date
05/24/2014Pubmed ID
24851789DOI
10.1016/j.arth.2014.03.036Scopus ID
2-s2.0-84905109730 (requires institutional sign-in at Scopus site) 7 CitationsAbstract
Scratching, scraping, and metal transfer to femoral heads commonly accompany acetabular shell contact during dislocation and closed reduction maneuvers. While head damage conceptually leads to accelerated wear, reports on this subject are mainly anecdotal, and differ widely on the potency of such effect. Towards better understanding this relationship, a physically validated finite element (FE) model was used to compute polyethylene wear acceleration propensity of specific head damage patterns on thirteen retrievals. These FE models estimated wear increases averaging half an order of magnitude when compared to simulations for undamaged heads. There was no correlation between the number of dislocations sustained and wear acceleration. These results underscore the importance of implant-gentle closed reduction, and heightened wear monitoring of successfully reduced dislocation patients.
Author List
Kruger KM, Tikekar NM, Heiner AD, Lannutti JJ, Callaghan JJ, Brown TDAuthor
Karen Kruger PhD Research Assistant Professor in the MU-MCW Department of Biomedical Engineering department at Marquette UniversityMESH terms used to index this publication - Major topics in bold
AdultAged
Aged, 80 and over
Arthroplasty, Replacement, Hip
Equipment Failure Analysis
Female
Femur Head
Finite Element Analysis
Hip Dislocation
Hip Prosthesis
Humans
Male
Metals
Middle Aged
Polyethylene
Prosthesis Failure
