During a period of three years, 20 patients underwent diagnostic arthroscopy followed by a poly-para-dioxanone augmented primary suture of the anterior cruciate ligament. Besides the clinical diagnostic measures, comparative electromyography and magnetic resonance imaging of the lower extremities were carried out. The control group consisted of ten test persons with healthy knees.
The circumference measurement confirmed general experience that legs with an identical circumference immediately after injury show a reduction in circumference of the injured leg in comparison to the uninjured leg during the rehabilitation phase, which is still detectable at the time of the follow-up examination in spite of adequate physiotherapy. The differences were greatest at 20 cm above the medial knee joint space. The difference was the result not only of the reduction in the injured leg but also of a marked increase in the circumference of the uninjured leg. These findings were confirmed by magnetic resonance imaging. The greatest differences and standard deviations in circumference between the two legs of the patients were found for the vastus medialis. However, at the time of follow-up this was the only muscle which had regained its preoperative cross-sectional area. The femoral flexor muscles were affected by these atrophic changes only to a small extent.
Electromyography of the vastus medialis, vastus lateralis, semimembranosus and biceps femoris showed that the muscles of the injured leg were less activated immediately after the injury than those of the other leg. The biceps femoris was less affected by this hypoinnervation than the other muscles. However, no injury-specific changes could be found in the EMG pattern of the patients in this study. The difference between the two legs remained detectable as a persisting neuromuscular dysbalance up to the time of follow-up examination and the greatest differences were found in the vastus medialis and semimembranosus muscles.
Erschienen: Wiley Online Library – 2016
Autoren: Alexander Katzer, Michael Hahn, Björn Busse, Mathias Procop, Jozef Zustin, Michael Amling
Erschienen: ACTA ORTHOPEDICA – November 2008
Autoren: Wolfram Steens, Jochen F. Loehr, Joachim Wodtke, Alexander Katzer
Erschienen: Journal of Biomedical Materials Research Part A – November 2008
Autoren: B. Busse, M. Hahn, M. Niecke, B. Jobke, K. Püschel, G. Delling, A. Katze
Erschienen: Journal of Orthopaedics and Traumatology - December 2007
Autoren: A. Katzer, A. Ince, M. Hahn, M.M. Morlock, W. Steens
Erschienen: The Journal of Bone & Joint Surgery – November 2006
Autoren: J. Gille, A. Ince, O. González, A. Katzer, J. F. Loehr
Weiterlesen … Single-stage revision of peri-prosthetic infection following total elbow replacement
Erschienen: ACTA ORTHOPEDICA – November 2008
Autoren: Wolfram Steens, Goetz von Foerster, Alexander Katzer
Erschienen: Orthopädische Praxis – 41 / 2005
Autoren: A. Katzer, J. Gille, K. Seemann
Erschienen: The Journal of Bone & Joint Surgery - 2005
Autoren: A. Ince, K. Seemann, L. Frommelt, A. Katzer, J.F. Loehr
Weiterlesen … Onestage exchange shoulder arthroplasty for peri-prosthetic infection
Erschienen: Clinical Infectious Diseases – Januar 2005
Autoren: A. Ince, J. Rupp, L. Frommelt, A. Katzer, J. Gille, J.F. Löhr
Erschienen: Orthopedics – Dezember 2004
Autoren: Alexander Katzer, Frank Sickelmann, Klaus Seemann, Jochen F. Löhr
Weiterlesen … Two-Year Results After Exchange Shoulder Arthroplasty Using Inverse Implants
Erschienen: Biomaterials – Mai 2002
Autoren: A. Katzer, H. Marquardt, J. Westendorf, J.V. Wening, G. von Foerster
Weiterlesen … Polyetheretherketone - Cytotoxicity and mutagenicity in vitro
Autoren: Alexander Katzer, Wolf-Peter Niedermauntel, Corinna Haack, Jörg Rump
Weiterlesen … Mittelfristige Ergebnisse mit der CFP-Prothese
Autoren: R. Souffrant, R. Schubert, W. Steens, A. Katzer, W. Mittelmeier, R. Bader
Erschienen: In vivo - Juli 2011
Autoren: Andreas Burkandt, Alexander Katzer, Karlheinz Thaler, Volker von Baehr, Reinhard E. Friedrich, Wolfgang Rüther, Michael Amling, Jozef Zustin
Weiterlesen … Proliferation of the synovial lining cell layer in suggested metal hypersensitivity
Erschienen: Biology of Metals – Mai 2008
Autoren: Wolfram Steens, Alexander Katzer
Weiterlesen … Severe cobalt poisoning in endoprosthetic replacement of the hip
Autoren: Alexander Katzer, Michel Hahn, M. Niecke, B. Jobke, K. Püschel, G. Delling, Björn Busse
Erschienen: Der Orthopäde – September 2006
Autoren: W. Steens, J. F. Loehr, G. von Foerster, A. Katzer
Weiterlesen … Chronic cobalt poisoning in endoprosthetic replacement
Erschienen: Der Orthopäde – September 2006
Autoren: W. Steens, J. F. Loehr, G. von Foerster, A. Katzer
Weiterlesen … Chronische Kobaltvergiftung in der Endoprothetik
Erschienen: The Journal of Arthroplasty – Juli 2006
Autoren: Alexander Katzer, Akif Ince, Joachim Wodtke, Jochen F. Loehr
Weiterlesen … Component Exchange in Treatment of Periprosthetic Femoral Fractures
Erschienen: European Journal of Trauma – April 2006
Autoren: Alexander Katzer, Wolfram Steens, Akif Ince
Erschienen: Journal of Orthopaedics and Traumatology – Juli 2004
Autoren: A. Ince, A. Katzer, J. Gille, J. F. Löhr, P. Moubayed
Erschienen: Hüftchirurgie in der Praxis – Dezember 2005
Autoren: J.F. Löhr, A. Katzer
Erschienen: Toxicology – September 2003
Autoren: A Katzer, S. Hockertz, G. H. Buchhorn, J. F. Loehr
Weiterlesen … In vitro toxicity and mutagenicity of CoCrMo and Ti6Al wear particles
Erschienen: Toxicology – September 2003
Autoren: A Katzer, S. Hockertz, G. H. Buchhorn, J. F. Loehr
Weiterlesen … In-vitro-Toxizität und Mutagenität von CoCrMo und TiAl-Abriebpartikeln
Erschienen: Der Orthopäde 09/2003
Autoren: J F Loehr, N. Gschwend, B. R. Simmen, A. Katzer
Erschienen: Der Orthopäde – Juli 2003
Autoren: J. F. Loehr, N. Gschwend, B. R. Simmen, A. Katzer
Autoren: Alexander Katzer, Akif Ince, Joachim Wodtke, Jochen F. Loehr
Weiterlesen … Komponentenwechsel bei periprothetischen Femurfrakturen
Erschienen: Journal of Orthopaedics and Traumatology – März 2003
Autoren: A. Katzer, H.C. Moeller, J.V. Wening, K.H. Jungbluth
Erschienen: Journal of Orthopaedics and Traumatology – Januar 2003
Autoren: A. Katzer, J.F. Lœhr
Weiterlesen … Early loosening of hip replacements: Causes, course and diagnosis
Erschienen: Aktuelle Traumatologie – August 2002
Autoren: A. Katzer, R. Sellckau, W. Siemsen, G. von Foerster
Weiterlesen … Rotating Knee Total Prosthesis ENDO-Modell - A functional analysis
Erschienen: Archives of Orthopaedic and Trauma Surgery - Juli 2002
Autoren: Alexander Katzer, Norbert M. Meenen, Frederike Grabbe, Johannes Maria Rueger
Erschienen: Journal of Orthopaedics and Traumatology – Januar 2002
Autor: Alexander Katzer