Gleitpaarungen Keramik/Polyethylen und Keramik/Keramik: Vergleich von in vitro und in vivo Abrieb
Autor: | G. Willmann |
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Rok vydání: | 2002 |
Předmět: | |
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 |
Externí odkaz: |
Abstrakt: | 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. |
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ISSN: | 15214052 09335137 |
DOI: | 10.1002/1521-4052(200208)33:83.0.co;2-p |