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Orthopaedic Proceedings
Vol. 101-B, Issue SUPP_5 | Pages 57 - 57
1 Apr 2019
Borton Z Nicholls A Mumith A Pearce A Briant-Evans T Stranks G Britton J Griffiths J
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Aims

Metal-on-metal total hip replacements (MoM THRs) are frequently revised. However, there is a paucity of data on clinical outcomes following revision surgery in this cohort. We report on outcomes from the largest consecutive series of revisions from MoM THRs and consider pre-revision factors which were prognostic for functional outcome.

Materials and Methods

A single-centre consecutive series of revisions from MoM THRs performed during 2006–2015 was identified through a prospectively maintained, purpose-built joint registry. The cohort was subsequently divided by the presence or absence of symptoms prior to revision. The primary outcome was functional outcome (Oxford Hip Score (OHS)). Secondary outcomes were complication data, pre- and post-revision serum metal ions and modified Oxford classification of pre-revision magnetic resonance imaging (MRI). In addition, the study data along with demographic data was interrogated for prognostic factors informing on post-revision functional outcome.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXIX | Pages 2 - 2
1 Sep 2012
Higgins J Pearce A Price M Conn K Stranks G Britton J
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Introduction

Large head total hip arthroplasty (THA) reduces dislocation rates and provides a theooretically larger range of motion. We hypothesised that this would translate into greater improvement in functional scores when compared to 28mm metal-on-polyethylene THA at 5 years. We believe ours to be the first in vivo comparison study.

Methods

A multi-surgeon case-control study in a District General Hospital. The study group consisted of 427 patients with 452 hips, the 38mm uncemented metal-on-metal articulation THA (M2A/Bi-metric, Biomet UK). The control group consisted of 438 age and sex-matched patients with 460 28mm metal-on-polyethylene articulation THA (Exeter/Exeter or Exeter/Duraloc - Stryker UK. All patients were assessed in a physiotherapist led Joint Review Service as part of their standard follow up, with functional scoring using Oxford Hip (scored 0–48) and WOMAC scores (0–100).