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Published in: Archives of Orthopaedic and Trauma Surgery 8/2022

Open Access 21-07-2021 | Hip-TEP | Hip Arthroplasty

Subsidence of a metaphyseal-anchored press-fit stem after 4-year follow-up: an EBRA-FCA analysis

Authors: Dietmar Dammerer, Philipp Blum, David Putzer, Dietmar Krappinger, Michael C. Liebensteiner, Michael Nogler, Martin Thaler

Published in: Archives of Orthopaedic and Trauma Surgery | Issue 8/2022

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Abstract

Purpose

Uncemented stem migration analysis by EBRA-FCA (Einzel-Bild-Roentgen Analyse, Femoral Component Analyse) has been seen to be a good predictive indicator for early implant failure. In this study, we investigated the migration behavior of a cementless metaphyseal-anchored press-fit stem after 4-year follow-up.

Methods

Applying a retrospective study design, we reviewed all consecutive patients who between 2012 and 2017 received a cementless Accolade II press-fit stem at our Department. We reviewed medical histories and performed radiological measurements using EBRA-FCA software. EBRA-FCA measurements and statistical investigations were performed by two independent investigators.

Results

A total of 102 stems in 91 patients (female 60; male 31) fulfilled our inclusion criteria. Mean age at surgery was 66.2 (range 24.3–92.6) years. EBRA migration analysis showed a mean subsidence of 1.4 mm (range 0.0–12.0) at final follow-up. The angle between stem and femur axis was 0.5° (range 0.0°–2.8°) after 48 months. No correlations between gender or Dorr types and subsidence were found (p > 0.05). A body mass index > 30 kg/m2 showed a significant increase in stem subsidence within the first 6 (p = 0.0258) and 12 months (p = 0.0466) postoperative.

Conclusions

Migration pattern of the metaphyseal-anchored stem and a low subsidence rate at final follow-up may predict a good long-term clinical result.

Trial registration

Number: 20181024-1875.
Literature
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Metadata
Title
Subsidence of a metaphyseal-anchored press-fit stem after 4-year follow-up: an EBRA-FCA analysis
Authors
Dietmar Dammerer
Philipp Blum
David Putzer
Dietmar Krappinger
Michael C. Liebensteiner
Michael Nogler
Martin Thaler
Publication date
21-07-2021
Publisher
Springer Berlin Heidelberg
Keywords
Hip-TEP
Hip-TEP
Published in
Archives of Orthopaedic and Trauma Surgery / Issue 8/2022
Print ISSN: 0936-8051
Electronic ISSN: 1434-3916
DOI
https://doi.org/10.1007/s00402-021-04068-8

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