title: [FE-analysis of surface stresses for the tribological system in total hip prostheses].
abstract: The implantation of a total hip prosthesis is an operation which is performed frequently due to advanced hip joint damage both in humans and in veterinary medicine in dogs. The long-term result of a hip prosthesis is mainly determined by aseptic loosening of the prosthesis; among other causes, abrasion particles of the tribological pairing are responsible for the loosening. For the analysis of the surface stresses with different tribological pairings, a finite element model was generated which was based on the CAD data of a commercial total hip prosthesis. After transmission of a physiological force in the components of the three tribological pairings ceramic/polyethylene, ceramic/ceramic and metal/polyethylene, stresses were calculated. Stresses in the ceramic/ceramic tribological pairings were conspicuously higher than in the other material pairings. In the future adapted prostheses have to be developed that ensure optimal friction and absorption characteristics of the components.
authors.affiliation: Institut für Umformtechnik und Umformmaschinen (IFUM), Leibniz Universität Hannover, Produktionstechnisches Zentrum Hannover (PZH), Garbsen, Deutschland.
authors.forename: Bernd-Arno
authors.initials: BA
authors.lastname: Behrens
authors.forename: Gabriele
authors.initials: G
authors.lastname: Helms
authors.forename: Olaf
authors.initials: O
authors.lastname: Pösse
authors.forename: Ingo
authors.initials: I
authors.lastname: Nolte
authors.forename: Andrea
authors.initials: A
authors.lastname: Meyer-Lindenberg
authors.forename: Pia
authors.initials: P
authors.lastname: Rittmann
authors.forename: Henning
authors.initials: H
authors.lastname: Windhagen
authors.forename: Thomas
authors.initials: T
authors.lastname: Pressel
mesh_terms: D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000379:methods; D003198:Computer Simulation; D019544:Equipment Failure Analysis / Q000379:methods*; D020342:Finite Element Analysis; D017276:Friction; D006621:Hip Joint / Q000503:physiopathology* / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D008153:Lubrication; D008954:Models, Biological; D011475:Prosthesis Failure; D013314:Stress, Mechanical; D013499:Surface Properties