Gleitpaarungen Keramik/Polyethylen und Keramik/Keramik: Vergleich von in vitro und in vivo Abrieb

Autor:	G. Willmann
Rok vydání:	2002
Předmět:	musculoskeletal diseases Materials science Joint arthroplasty Hip simulator Mechanics of Materials business.industry Mechanical Engineering Dentistry General Materials Science Condensed Matter Physics business Biomedical engineering
Zdroj:	Materialwissenschaft und Werkstofftechnik. 33:459-463
ISSN:	1521-4052 0933-5137
DOI:	10.1002/1521-4052(200208)33:8<459::aid-mawe459>3.0.co;2-p
Popis:	For more than 30 years ceramics are used for heads and acetabular cups of hip joint arthroplasty. The results of wear rates of metal-on-polyethylene, ceramic-on-polyethylene and ceramic-on-ceramic determined from a hip simulator testing were not confirmed when comparing to results of clinical follow ups using either X-rays methods or investigating retrieved implants. There is consensus that the wear couple of metal-on-polyethylene is twice or three times larger than the one for ceramic-on-poly-ethylene. Ceramic-on-ceramic offers the option of 5μm/year. When evaluation novel concepts the best is to investigate retrievals because the hip simulator does not mimic all in-vivo effects. Hip simulator testing is not worse case testing as it should be, hip simulator testing is best case testing. The results may be used for screening purposes.
Databáze:	OpenAIRE
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