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Archives of Orthopaedic and Trauma Surgery

01.02.2016 | Hip Arthroplasty

Prospective clinical and radiostereometric analysis of the Fitmore short-stem total hip arthroplasty

verfasst von: Yves P. Acklin, Raphael Jenni, Heinz Bereiter, Caroline Thalmann, Karl Stoffel

Erschienen in: Archives of Orthopaedic and Trauma Surgery | Ausgabe 2/2016

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Abstract

Introduction

Uncemented short, curved femoral stems may help save proximal bone stock during total hip arthroplasty (THA) and facilitate insertion in minimal invasive surgery. The aim of this 2 year, prospective, single-center study was to examine the stability and migration of the Fitmore^® stem in THA using model-based radiostereometric analysis (RSA), and thus predict the implant’s long-term survival. In addition, we evaluated the stem’s clinical performance using standard clinical measures.

Patients and methods

We conducted a prospective cohort study of 34 THA patients who received the short Fitmore Hip Stem (Zimmer, Winterthur, Switzerland). At 3, 6, 12 and 24 months postoperatively, the patients underwent clinical evaluation and radiostereometric analysis (RSA) to measure stem migration.

Results

RSA analysis revealed a mean subsidence of −0.39 mm (95 % CI −0.60 to −0.18) at 3 months with no further migration after 2 years. Mean internal rotation along the longitudinal axis was 1.09° (95 % CI 0.52–1.66) at 2 years, versus 0.85° (95 % CI 0.44–1.26) at 3 months. The Harris hip score improved from 60 (range 30–80) preoperatively to 99 (range 83–100) after 2 years. Three patients underwent revision due to deep infection, non-specific thigh pain and aseptic loosening in one case.

Conclusion

We conclude that the Fitmore Hip Stem stabilizes after 3 months and achieves good short-term clinical results in most cases.

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Titel: Prospective clinical and radiostereometric analysis of the Fitmore short-stem total hip arthroplasty
verfasst von: Yves P. Acklin
Raphael Jenni
Heinz Bereiter
Caroline Thalmann
Karl Stoffel
Publikationsdatum: 01.02.2016
Verlag: Springer Berlin Heidelberg
Erschienen in: Archives of Orthopaedic and Trauma Surgery / Ausgabe 2/2016
Print ISSN: 0936-8051
Elektronische ISSN: 1434-3916
DOI: https://doi.org/10.1007/s00402-015-2401-9

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Springer Medizin

Prospective clinical and radiostereometric analysis of the Fitmore short-stem total hip arthroplasty

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Patients and methods

Results

Conclusion

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Arthropedia

Neu im Fachgebiet Orthopädie und Unfallchirurgie

Therapiestart mit Blutdrucksenkern erhöht Frakturrisiko

Ärztliche Empathie hilft gegen Rückenschmerzen

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Vorsicht mit hohen NSAR-Dosen bei ankylosierender Spondylitis!

Update Orthopädie und Unfallchirurgie