title: [Design considerations for improving the acetabular cup of the ESKA hip endoprosthesis by using the ceramic/ceramic wear couple].
abstract: Since 1987, cementless THR acetabular components with coarsely reticulate surfaces (S&G, ESKA) have been implanted in the Department of Orthopaedic Surgery of the Alfried Krupp Hospital in Essen. By 31st December 1995, 590 of these components had been implanted. Follow-up of the first 51 of these completely cement free THRs revealed loosening in an only single case (2%). Despite these good medium-term results, however, it must be expected that over a ten-year period, the life of the THR will decrease, the probable reason being increasing debris caused by polyethylene (PE) wear leading to aseptic loosening. An alternative to the PE/ceramic system of opposing materials would be ceramic/ceramic. Experience to date has shown that the biological inertness of ceramic does not allow ingrowth and bony integration to take place. Against this background an acetabular component employing a metal backing with the 3-dimensional reticulate surface mentioned above and a Biolox ceramic cup insert articulating with a Biolox ceramic femoral head was designed. The result is a cement free modular THR with optimal bony integration properties and articulating surfaces. To investigate the superiority of this new concept, a comparative study involving two groups of 50 patients each, one group receiving the PE/ceramic system, the other the new ceramic/ceramic system, has been initiated.
authors.affiliation: Klinik für Orthopädie und Orthopädische Chirurgie mit Sportmedizin, Alfried Krupp von Bohlen und Halbach Krankenhaus, Lübeck.
authors.forename: G
authors.initials: G
authors.lastname: Quack
authors.forename: G
authors.initials: G
authors.lastname: Willmann
authors.forename: H
authors.initials: H
authors.lastname: Krahl
authors.forename: H
authors.initials: H
authors.lastname: Grundei
mesh_terms: D000077:Acetabulum / Q000601:surgery*; D002516:Ceramics; D006622:Hip Prosthesis; D006801:Humans; D011474:Prosthesis Design; D011475:Prosthesis Failure; D013499:Surface Properties
vernacular_title: Konzeptionelle Uberlegungen zur Verbesserung der Pfanne der ESKA-Hüftendoprothese durch die Gleitpaarung Keramik/Keramik.