Artikel
EBRA migration analysis of a modular, distally fixed stem in hip revision arthroplasty: a clinical and radiological study
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Autoren
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Philipp Blum
- Medizinische Universität Innsbruck (Österreich), BG Unfallklinik Murnau, Murnau, Germany
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David Putzer
- Experimentelle Orthopädie, Innsbruck, Austria
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Johannes Neugebauer
- Medizinische Universität Innsbruck, Innsbruck, Austria
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Markus Süß
- Medizinische Universität Innsbruck, Innsbruck, Austria
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Dietmar Dammerer
- Universitätsklinikum Krems, Krems an der Donau, Austria
| Veröffentlicht: | 25. Oktober 2022 |
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Gliederung
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Objectives: Massive osteolysis of the proximal femur makes stem revision a challenging procedure. EBRA-FCA provides the opportunity to determine stem migration, which is considered a predictive factor for implant survival. In this study, we aimed to analyze the migration behavior of a modular, distally fixed reconstruction prosthesis.
Methods: Applying a retrospective study design, we reviewed all consecutive patients who received a cementless MP reconstruction prosthesis (Waldemar Link GmbH & Co. KG, Hamburg, Germany) at our Department between 2005 and 2019. We reviewed medical histories and performed radiological measurements using EBRA-FCA software.
Results and conclusion: A total of 67 stems in 62 patients (female 26; male 36) fulfilled our inclusion criteria. Mean age at surgery was 68.0 (range 38.7-88.44) years. EBRA migration analysis showed a median subsidence of 1.6 mm (range, 0.0-20.6) at 24 months. The angle between stem and femur axis was 0.3° (range, 0.0-2.9) at final follow-up. No correlation between body mass index and increased subsidence was found (p > 0.05). Overall revision-free rate amounted to 92.5% and revision-free rate for aseptic loosening to 98.5%. Furthermore, no case of material breakage was detected.
In summary, the MP reconstruction prosthesis showed low subsidence and reduction of the migration rate over the investigated follow-up. Based on this, the modular stem can be considered as a good therapy option in challenging stem revisions offering various options to address the individual anatomical situation.
