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Erschienen in: Archives of Orthopaedic and Trauma Surgery 4/2018

03.02.2018 | Hip Arthroplasty

Short stem survival after osteonecrosis of the femoral head

verfasst von: Christoph Schnurr, Anissa Loucif, Theresa Patzer, Bernd Schellen, Johannes Beckmann, Peer Eysel

Erschienen in: Archives of Orthopaedic and Trauma Surgery | Ausgabe 4/2018

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Abstract

Introduction

Short stems were developed as a bone-conserving alternative especially for the young hip arthroplasty patient. Patients suffering from osteonecrosis of the femoral head are frequently younger than primary arthritis patients. The outcome of short stems in these patients remains unclear. The aim of our study was to compare mid-term survival of short stems after osteonecrosis of the femoral head (ONFH) and primary arthritis.

Materials and methods

Data on short stem implantations over a 10-year period were collected. Demographic data and X-ray measurements before and after surgery were recorded. Indication for operation was determined from medical records and X-rays. Patients were asked by post about any revision. Reason for revision was identified by analysis of operation protocols. Short stem revision rates were analyzed using Kaplan–Meier charts, comparing 212 ONFH patients (231 operations) and 1284 primary arthritis patients (1455 operations).

Results

Follow-up time averaged 5.3 and 6 years and was complete for 92% (ONFH) and 94% (primary arthritis) of the patients. ONFH patients were significantly younger (53 years vs. 59 years, p < 0.001) and more frequently male (55 vs. 42%, p < 0.001). The total revision rate did not differ between the two groups (8 years: 4.2 vs. 5.6%, p = ns). A trend towards more stem revisions was detected for ONFH patients (3 vs. 1.8%, p = ns). The aseptic stem loosening rate was significantly elevated for osteonecrosis patients (8 years: 2.6 vs. 0.7%, p = 0.013).

Conclusions

Our study showed elevated short stem loosening rates after ONFH. Similar results are published for classic cementless stems. The question of which stem is best for the young osteonecrosis patient cannot be answered yet. Consecutive studies directly comparing loosening rates of short and classic cementless stems in young osteonecrosis patients are required.
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Metadaten
Titel
Short stem survival after osteonecrosis of the femoral head
verfasst von
Christoph Schnurr
Anissa Loucif
Theresa Patzer
Bernd Schellen
Johannes Beckmann
Peer Eysel
Publikationsdatum
03.02.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
Archives of Orthopaedic and Trauma Surgery / Ausgabe 4/2018
Print ISSN: 0936-8051
Elektronische ISSN: 1434-3916
DOI
https://doi.org/10.1007/s00402-018-2892-2

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