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Biomedical Engineering / Biomedizinische Technik

Joint Journal of the German Society for Biomedical Engineering in VDE and the Austrian and Swiss Societies for Biomedical Engineering and the German Society of Biomaterials

Editor-in-Chief: Dössel, Olaf

Editorial Board: Augat, Peter / Habibović, Pamela / Haueisen, Jens / Jahnen-Dechent, Wilhelm / Jockenhoevel, Stefan / Knaup-Gregori, Petra / Lenarz, Thomas / Leonhardt, Steffen / Plank, Gernot / Radermacher, Klaus M. / Schkommodau, Erik / Stieglitz, Thomas / Boenick, Ulrich / Jaramaz, Branislav / Kraft, Marc / Lenthe, Harry / Lo, Benny / Mainardi, Luca / Micera, Silvestro / Penzel, Thomas / Robitzki, Andrea A. / Schaeffter, Tobias / Snedeker, Jess G. / Sörnmo, Leif / Sugano, Nobuhiko / Werner, Jürgen /

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Volume 63, Issue 6

Issues

Volume 57 (2012)

Radiostereometric migration measurement of an uncemented Cerafit® femoral stem: 26 patients followed for 10 years

Stefan Sesselmann
  • Corresponding author
  • Department of Orthopaedic Surgery, University of Erlangen-Nuremberg, Rathsberger Str. 57, 91054 Erlangen, Germany
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Yotung Hong
  • Department of Orthopaedic Surgery, University of Erlangen-Nuremberg, Rathsberger Str. 57, 91054 Erlangen, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Frank Schlemmer
  • Department of Orthopaedic Surgery, University of Erlangen-Nuremberg, Rathsberger Str. 57, 91054 Erlangen, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Isabell Hussnaetter
  • Department of Orthopaedic Surgery, University of Erlangen-Nuremberg, Rathsberger Str. 57, 91054 Erlangen, Germany
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  • De Gruyter OnlineGoogle Scholar
/ Lutz A. Mueller
  • Department of Orthopaedic Surgery, University of Erlangen-Nuremberg, Rathsberger Str. 57, 91054 Erlangen, Germany
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/ Raimund Forst
  • Department of Orthopaedic Surgery, University of Erlangen-Nuremberg, Rathsberger Str. 57, 91054 Erlangen, Germany
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  • De Gruyter OnlineGoogle Scholar
/ Franz Tschunko
  • Department of Neuroradiology, University of Erlangen-Nuremberg, Schwabachanlage 6, 91054 Erlangen, Germany
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  • De Gruyter OnlineGoogle Scholar
Published Online: 2017-08-18 | DOI: https://doi.org/10.1515/bmt-2016-0251

Abstract

Radiostereometric analysis (RSA) is the gold standard for evaluating micromotions of orthopaedic implants. The method is applied for identifying novel design weaknesses in endoprostheses. Current research frequently assesses relatively short time periods. Short-term RSA studies have been widely used for predicting the long-term stability of many hip prosthetic designs, but only a few studies have focused on uncemented hip implants, especially for extended periods. The purpose of this study was to analyse the migration pattern of the Cerafit® femoral stem within 10 years and to verify the predictive value of short-term RSA after 2 years for this uncemented femoral hip stem. Twenty-six patients were followed for 10 years. Ten years after implantation, a mean subsidence of 0.22 mm±0.56 mm, a mean internal rotation of 0.59°±1.67° and a mean maximum total point motion (MTPM) of 1.28 mm±0.54 mm were detected. The main migration took place in the first 6 weeks after surgery (subsidence of 0.36 mm±0.73 mm; internal rotation of 0.62°±1.49°, MTPM of 1.05 mm±0.68 mm). All the migration values measured were small. No late-onset migration was observed. This study suggests that the Cerafit® implants are stable after 10 years. Thus, RSA could be the best tool to assess long-term implant behaviour.

Keywords: implant migration; RSA; subsidence; total hip arthroplasty

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About the article

Corresponding author: Dr. med. Stefan Sesselmann, MHBA, Department of Orthopaedic Surgery, University of Erlangen-Nuremberg, Rathsberger Str. 57, 91054 Erlangen, Germany


Received: 2016-12-15

Accepted: 2017-07-03

Published Online: 2017-08-18

Published in Print: 2018-11-27


Conflict of interest statement: No competing interests declared.


Citation Information: Biomedical Engineering / Biomedizinische Technik, Volume 63, Issue 6, Pages 657–663, ISSN (Online) 1862-278X, ISSN (Print) 0013-5585, DOI: https://doi.org/10.1515/bmt-2016-0251.

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