A novel formulation for scratch-based wear modelling in total hip arthroplasty. Comput Methods Biomech Biomed Engin 2014;17(11):1227-36
Date
01/12/2013Pubmed ID
23305334Pubmed Central ID
PMC3630235DOI
10.1080/10255842.2012.739168Scopus ID
2-s2.0-84898538601 (requires institutional sign-in at Scopus site) 9 CitationsAbstract
Damage to the femoral head in total hip arthroplasty often takes the form of discrete scratches, which can lead to dramatic wear acceleration of the polyethylene (PE) liner. Here, a novel formulation is reported for finite element (FE) analysis of wear acceleration due to scratch damage. A diffused-light photography technique was used to globally locate areas of damage, providing guidance for usage of high-magnification optical profilometry to determine individual scratch morphology. This multiscale image combination allowed comprehensive input of scratch-based damage patterns to an FE Archard wear model, to determine the wear acceleration associated with specific retrieval femoral heads. The wear algorithm imposed correspondingly elevated wear factors on areas of PE incrementally overpassed by individual scratches. Physical validation was provided by agreement with experimental data for custom-ruled scratch patterns. Illustrative wear acceleration results are presented for four retrieval femoral heads.
Author List
Kruger KM, Tikekar NM, Heiner AD, Baer TE, 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
AlgorithmsArthroplasty, Replacement, Hip
Femur Head
Finite Element Analysis
Hip Prosthesis
Humans
Polyethylenes