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01-03-2017 | Original Paper

Dual-mobility implants prevent hip dislocation following hip revision in obese patients

Authors: Philippe Hernigou, Jean Charles Auregan, Damien Potage, François Roubineau, Charles Henri Flouzat Lachaniette, Arnaud Dubory

Published in: International Orthopaedics | Issue 3/2017

Abstract

Purpose

Revision total hip arthroplasty (THA) is associated with increased rates of dislocation in obese patients. It is not known whether dual-mobility implants decrease dislocation in these patients with obesity.

Methods

We retrospectively reviewed two groups of revision THAs to compare the dislocation rate between 32 obese patients (BMI >30 kg/m²) with standard cups, and 35 obese patients (BMI >30 kg/m²) with dual-mobility cups. All patients received the same implants except for diameter head (32-mm head with standard cups and 28-mm head with dual mobility) and had the same cemented stem that was not changed at revision. The patients were followed at routine intervals and were specifically queried about dislocation. The two groups were similar in terms of age, gender, causes of revision and follow-up since the primary arthroplasty.

Results

With standard liners, more hips in obese patients dislocated than did hips in obese patients who received dual-mobility implants. The number of dislocations in standard hips was at one year follow-up 15.6 % (5 of 32) compared with 0 % in dual-mobility hips and was at five year follow-up 21.8 % (7 of 32) compared with 2.8 % (1 of 35). After a mean follow-up of seven years no cases of loosening were found. Five patients in the obese group with a standard liner underwent re-revision surgery, the additional re-operations being necessary to treat recurrent postoperative dislocation.

Conclusions

Obese patients should be counselled about the important risk of dislocation that occurs with standard liners after revision THA. Dual-mobility liners in these patients with hip revision is an efficient technique to prevent post-operative hip dislocation.

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Title: Dual-mobility implants prevent hip dislocation following hip revision in obese patients
Authors: Philippe Hernigou
Jean Charles Auregan
Damien Potage
François Roubineau
Charles Henri Flouzat Lachaniette
Arnaud Dubory
Publication date: 01-03-2017
Publisher: Springer Berlin Heidelberg
Published in: International Orthopaedics / Issue 3/2017
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI: https://doi.org/10.1007/s00264-016-3316-y

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Dual-mobility implants prevent hip dislocation following hip revision in obese patients

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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