title: Outcome of a modular tapered uncemented titanium femoral stem in revision hip arthroplasty.
abstract: OBJECTIVE
  Revision hip arthroplasty using a modular tapered design gives the possibility for customising the prostheses to the individual anatomy intra-operatively. The success of this kind of surgery is still controversial due to the relative lack of medium- to long-term follow-up. Therefore we analysed the clinical and radiological outcome of the modular MRP-TITAN stem with diaphyseal fixation in revision hip surgery.
  
  
  METHODS
  In this retrospective study we included 136 consecutive patients with MRP-TITAN stem implanted during revision hip arthroplasty. The average follow-up was 55 months. For clinical evaluation we used the Harris Hip Score and the Merle d'Aubigné and Postel score. The health-related quality of life was determined with the visual analogue pain scale.
  
  
  RESULTS
  The surgeries were performed 109 months after primary total hip arthroplasty on average. The main indications for the MRP-TITAN revision stem were aseptic loosening, infection, and periprosthetic fracture. In the clinical outcome, patients achieved 75.1 points in the Harris Hip Score and 14.4 points in the Merle d'Aubigné and Postel Score. Mean level of persisting pain was 0.7 (VAS). The overall survival of the MRP stem in revision hip arthroplasty revealed 85.6% survival at 9.75 years' follow-up with a repeat revision rate of 6.8%.
  
  
  CONCLUSIONS
  Performing revision hip arthroplasty using the MRP-TITAN stem revealed a good clinical outcome. There is a tendency for better results in comparison with the information given in literature for cementless modular revision stems including a lower rate in re-revisions.
authors.affiliation: Orthopaedic Clinic Koenig-Ludwig-Haus, Center for Musculoskeletal Research, Julius-Maximilians-University Wuerzburg, Brettreichstr. 11, 97074, Wuerzburg, Germany, m-hoberg.klh@uni-wuerzburg.de.
authors.forename: Maik
authors.initials: M
authors.lastname: Hoberg
authors.forename: Christian
authors.initials: C
authors.lastname: Konrads
authors.forename: Jana
authors.initials: J
authors.lastname: Engelien
authors.forename: Dorothee
authors.initials: D
authors.lastname: Oschmann
authors.forename: Michael
authors.initials: M
authors.lastname: Holder
authors.forename: Matthias
authors.initials: M
authors.lastname: Walcher
authors.forename: Maximilian
authors.initials: M
authors.lastname: Rudert
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D001672:Biocompatible Materials; D005260:Female; D006621:Hip Joint / Q000601:surgery*; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D007592:Joint Diseases / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D057068:Periprosthetic Fractures / Q000209:etiology / Q000601:surgery; D011474:Prosthesis Design; D011475:Prosthesis Failure; D016459:Prosthesis-Related Infections / Q000209:etiology / Q000601:surgery; D011788:Quality of Life; D012086:Reoperation; D012189:Retrospective Studies; D014025:Titanium; D016896:Treatment Outcome
chemical_list: D001672:Biocompatible Materials; D014025:Titanium