Validation of volumetric and linear wear-measurement in UHMWPE cups—a hip simulator analysis

Autor:	Atsuhiro Imakiire, Kengo Yamamoto, Paul Allen Williams, Toshinori Masaoka, Hiromu Shoji, Ian C. Clarke, Victoria D. Good, Jiro Tamura
Rok vydání:	2003
Předmět:	Materials science Surfaces and Interfaces Condensed Matter Physics Linear methods Surfaces Coatings and Films Hip simulator Creep Volumetric wear Mechanics of Materials Materials Chemistry Forensic engineering Gravimetric analysis Composite material Wear measurement
Zdroj:	Wear. 254:391-398
ISSN:	0043-1648
DOI:	10.1016/s0043-1648(02)00064-9
Popis:	Wear in retrieved cups can be assessed by linear measurements of cup thickness, 3-D tracings of cup geometry and by fluid-displacement techniques. We used a hip simulator model to produce both creep and wear in 22.25 and 28 mm diameter hip implants and assessed wear by gravimetric methods (no creep) for comparison to linear and volumetric methods. With the oil-displacement method, wear was overestimated by a ratio 1.07. With the linear method and wear expression “A” (d V = πR 1 2 p ), the ratio was 1.20. With the geometric wear expression “B” (d V = πR 1 2 p /[1+( R 2 − R 1 )/ p ]), the ratio was reduced to 1.15. The oil method demonstrated an accuracy better than 15% (upper 95% CL) when wear exceeded 200 mm 3 (4.5–8 million). Accuracy in method “B” was >20%. We would not recommend using method “A”, with its accuracy not >40%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f71cdfd2b87c760e509b783f9f9563a5 https://doi.org/10.1016/s0043-1648(02)00064-9 Zobrazit plný text záznamu Full Text from ScienceDirect