[Ceramic-to-ceramic combination. Relic or renaissance?].
More than 20 years after the introduction of the alumina-alumina bearing system for total hip replacements (THRs) in Germany, this combination still only accounts for a small percentage of the conventional combinations with polyethylene cups. Follow-up examinations of ceramic-ceramic THRs with early alumina quality result in an extreme range of linear wear rates from 30 nm to 3.7 mm per year. Simulator tests confirm the potential for minimal debris generation but also show the sensitivity of the system to malpositioning and un-smooth repositioning.
Walter
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Klinikum Grosshadern, Ludwig-Maximilians-Universität München.
D000537:Aluminum Oxide; D001696:Biomechanical Phenomena; D002516:Ceramics; D003343:Corrosion; D017276:Friction; D006622:Hip Prosthesis / Q000295:instrumentation*; D006801:Humans; D008422:Materials Testing / Q000379:methods; D011474:Prosthesis Design; D016474:Weight-Bearing
D000537:Aluminum Oxide
Die Keramik-Keramik-Paarung. Schattendasein oder Renaissance?