Patient-specific hip geometry has greater effect on THA wear than femoral head size
Jazyk angličtina Země Spojené státy americké Médium print-electronic
Typ dokumentu časopisecké články
PubMed
27842781
DOI
10.1016/j.jbiomech.2016.10.030
PII: S0021-9290(16)31130-7
Knihovny.cz E-zdroje
- Klíčová slova
- Contact pressure, Design, Linear penetration, UHMWPE,
- MeSH
- acetabulum anatomie a histologie fyziologie MeSH
- hlavice femuru anatomie a histologie fyziologie MeSH
- kosterní svaly anatomie a histologie fyziologie MeSH
- kyčelní protézy * MeSH
- lidé středního věku MeSH
- lidé MeSH
- náhrada kyčelního kloubu * MeSH
- počítačové modelování podle konkrétního pacienta MeSH
- polyethylen MeSH
- senioři MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- polyethylen MeSH
In vivo linear penetration in total hip arthroplasty (THA) exhibits similar values for 28mm and 32mm femoral head diameter with considerable variations between and within the studies. It indicates factors other than femoral head diameter influence polyethylene wear. This study is intended to test the effect of patient׳s individual geometry of musculoskeletal system, acetabular cup orientation, and radius of femoral head on wear. Variation in patient׳s musculoskeletal geometry and acetabular cup placement is evaluated in two groups of patients implanted with 28mm and 32mm THA heads. Linear wear rate estimated by mathematical model is 0.165-0.185mm/year and 0.157-0.205mm/year for 28 and 32mm THA heads, respectively. Simulations show little influence femoral head size has on the estimated annual wear rate. Predicted annual linear wear depends mostly on the abduction angle of the acetabular cup and individual geometry of the musculoskeletal system of the hip, with the latter having the greatest affect on variation in linear wear rate.
1st Faculty of Medicine Charles University Prague Czechia
Department of Orthopaedic Surgery University Medical Centre Ljubljana Ljubljana Slovenia
Faculty of Mechanical Engineering Czech Technical University Prague Czechia
Laboratory of Biophysics Faculty of Electrical Engineering University of Ljubljana Slovenia
Laboratory of Clinical Biophysics Faculty of Health Sciences University of Ljubljana Slovenia
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