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Published in: International Orthopaedics 4/2018

01-04-2018 | Original Paper

Dislocations after use of dual-mobility cups in cementless primary total hip arthroplasty: prospective multicentre series

Authors: Ji-hyo Hwang, Sang-Min Kim, Kwang-Jun Oh, Yeesuk Kim

Published in: International Orthopaedics | Issue 4/2018

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Abstract

Background

The purpose of this study was to investigate the incidence of dislocation and specific complications of the dual-mobility cup.

Methods

The arthroplasties involved 167 hips in 165 patients; 51 hips (30.5%) were in men and 116 (69.4%) were in women. The active articulation E1® dual-mobility cup (Biomet, Warsaw, IN, USA) was used, and the surgical approach was posterolateral in 120 hips and anterolateral in 47 hips.

Results

Four (2.3%) dislocations were observed. Mean time of dislocation was 30.5 days post-operatively. Three incomplete reductions occurred during closed reduction. When comparing parameters between dislocation and no-dislocation groups, there were no differences in patient and surgical parameters. However, all dislocations occurred in patients with femoral neck fractures and in the posterolateral approach group.

Conclusion

The incidence of dislocation in total hip arthroplasty (THA) using a dual-mobility cup was acceptable, and cup diameter of the dislocation group was substantially larger than that of no-dislocation group. Based on clinical outcomes of our study, we conclude that the dual-mobility cup is a reliable option in THA, and further studies are necessary.
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Metadata
Title
Dislocations after use of dual-mobility cups in cementless primary total hip arthroplasty: prospective multicentre series
Authors
Ji-hyo Hwang
Sang-Min Kim
Kwang-Jun Oh
Yeesuk Kim
Publication date
01-04-2018
Publisher
Springer Berlin Heidelberg
Published in
International Orthopaedics / Issue 4/2018
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-017-3660-6

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