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Z Orthop Unfall 2007; 145: S3-S8
DOI: 10.1055/s-2007-965652
Original Article

© Georg Thieme Verlag KG Stuttgart · New York

Prospective Long-Term Follow-Up of the Cementless Bicontact Hip Stem with Plasmapore Coating

U. Ochs1 , C. Eingartner2 , R. Volkmann3 , B. G. Ochs1 , C. Huber1 , S. Weller1 , K. Weise1
  • 1BG Trauma Centre, University of Tuebingen, Germany
  • 2Unit for Trauma and Reconstructive Surgery, Caritas Hospital, Bad Mergentheim, Germany
  • 3Department for Trauma and Reconstructive Surgery, Clinical Center, Bad Hersfeld, Germany
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Publication History

Publication Date:
16 October 2007 (online)

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Abstract

Aim: A prospective long-term study of the first 250 cementless Bicontact stems implanted in the BG Trauma Centre, Tuebingen, Germany. Method: All of the patients in this series (treatment period June 1987 to April 1990) who were still contactable were invited for clinical and radiological follow-up. The radiographs were analysed for signs of loosening in the form of Gruen lysis zones, stress shielding, subsidence behaviour, heterotopic ossification and spot welds. Results: The average follow-up period was 17.8 (16.7 - 19.5) years. The overall rate of follow-up was 65 % (162 of 250) and 91 % of patients who were still alive (162 of 179). The average patient age was 56.2 years at the time of operation and 74.0 years at follow-up. The average HHS was 81.6 points. In the course of the first 10 years (up to 03/1998), a total of 8 stem revisions had to be performed. In the period from 03/1998 to 01/2007, 2 cases of loosening requiring revision occurred in the patients still alive at the time of follow-up. The survival rate calculated was thus 95.6 %. Conclusion: These outstanding results provide enduring support for the philosophy of the cementless and bone-preserving fixation principles underlying the Bicontact hip stem with proximal intertrochanteric transmission of forces and high primary rotational stability.

Key words

total hip arthroplasty - cementless - proximal fixation - long‐term results

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Dr. MD Uwe Ochs

Berufsgenossenschaftliche Unfallklinik

Schnarrenbergstr. 95

72076 Tuebingen

Germany

Phone: + 49 70 71 6 06 11 67

Fax: + 49 70 71 6 06 10 02

Email: uochs@bgu-tuebingen.de