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Cementless Total Hip Arthroplasty with the Rectangular Titanium Zweymüller StemA Concise Follow-up, at a Minimum of Twenty Years, of Previous Reports*
Alexander Kolb, MD1; Alexander Grübl, MD2; Charlotte-Dorothé Schneckener, MD1; Catharina Chiari, MD1; Alexandra Kaider, MSc3; Richard Lass, MD1; Reinhard Windhager, MD1
1 Department of Orthopaedics, Medical University of Vienna, Waehringer Gürtel 18-20, 1090 Vienna, Austria. E-mail address for A. Kolb: alexander.kolb@meduniwien.ac.at. E-mail address for C.-D. Schneckener: charlotte.schneckener@gmail.com. E-mail address for C. Chiari: catharina.chiari@meduniwien.ac.at. E-mail address for R. Lass: richard.lass@meduniwien.ac.at. E-mail address for R. Windhager: reinhard.windhager@meduniwien.ac.at
2 Sanatorium Hera, Löblichgasse 14, 1090 Vienna, Austria. E-mail address: info@drgruebl.at
3 Center for Medical Statistics, Informatics and Intelligent Systems, Medical University of Vienna, Spitalgasse 23, 1090 Vienna, Austria. E-mail address: alexandra.kaider@meduniwien.ac.at
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Original Publications Grübl A, Chiari C, Gruber M, Kaider A, Gottsauner-Wolf F. Cementless total hip arthroplasty with a tapered, rectangular titanium stem and a threaded cup: a minimum ten-year follow-up. J Bone Joint Surg Am. 2002;84:425-31.

Grübl A, Chiari C, Giurea A, Gruber M, Kaider A, Marker M, Zehetgruber H, Gottsauner-Wolf F. Cementless total hip arthroplasty with the rectangular titanium Zweymüller stem. A concise follow-up, at a minimum of fifteen years, of a previous report. J Bone Joint Surg Am. 2006 Oct;88(10):2210-5.

Investigation performed at the Department of Orthopaedics, Medical University of Vienna, Vienna, Austria



Disclosure: One or more of the authors received payments or services, either directly or indirectly (i.e., via his or her institution), from a third party in support of an aspect of this work. In addition, one or more of the authors, or his or her institution, has had a financial relationship, in the thirty-six months prior to submission of this work, with an entity in the biomedical arena that could be perceived to influence or have the potential to influence what is written in this work. No author has had any other relationships, or has engaged in any other activities, that could be perceived to influence or have the potential to influence what is written in this work. The complete Disclosures of Potential Conflicts of Interest submitted by authors are always provided with the online version of the article.

Copyright © 2012 by The Journal of Bone and Joint Surgery, Inc.
J Bone Joint Surg Am, 2012 Sep 19;94(18):1681-1684. doi: 10.2106/JBJS.K.01574
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Abstract

In 2002 and 2006, we reported the long-term results of 208 total hip replacements performed with the Zweymüller stem and a threaded cup in 200 patients. The present study gives an update on this patient cohort. At a minimum of twenty years postoperatively, seventy-three patients (seventy-five hips) were available for follow-up; twelve patients were lost to follow-up. The key findings of our previous reports were the absence of aseptic femoral stem loosening and a poor rate of survival of the threaded cup. Since then, two revisions have been performed because of aseptic stem loosening. We observed osteolytic lesions around the proximal part of the femoral component on twenty-four (47%) of fifty-one radiographs, but no stem was deemed at risk for loosening. The probability of survival of the stem at twenty years was 0.96 (95% confidence interval, 0.91 to 0.99), and the probability of survival of the cup at twenty years was 0.67 (95% confidence interval, 0.57 to 0.75). The Zweymüller femoral stem, a tapered, rectangular implant, continues to give excellent long-term results.

Level of Evidence: 

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

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    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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