AI Article Synopsis
- The study investigates the re-dislocation rates after revision surgery for recurrent dislocation in total hip arthroplasty (THA) over an 8-year period, finding a rate of 16.7% for late dislocations.
- The major causes of recurrent dislocation identified were socket mal-orientation and abductor deficiency, and most patients underwent revision of both hip components.
- No re-dislocations occurred within the first 90 days post-surgery, indicating favorable short-term outcomes after the revisions.
Article Abstract
Background: The cause of recurrent dislocation following primary total hip arthroplasty (THA) is multifactorial. A re-dislocation rate of up-to 34% following revision is reported. The aim of this study was to determine the re-dislocation rates following revision for recurrent THR dislocation.
Methodology: Patients who underwent revision for recurrent dislocation between January 2008 and January 2015 were identified. We identified the date and type of primary implant, overall number and reasons for dislocation, revision implant details and complication data.
Results: Over an 8-year period, 24 patients underwent revision. The median age was 77 (68-85) years, median time to first dislocation was 78 (23-160) months and median number of dislocations was 3 (2-4) with a mean follow-up of 18 months. Socket Mal-Orientation (10) and Abductor deficiency (5) were the main causes of recurrent dislocation. 21 patients (88%) underwent revision of both components, 1 patient underwent isolated cup revision and 2 patients had revision of acetabular component with insertion of a BioBall. There were no dislocations within 90 days of revision surgery. 4 patients had late dislocations (3 recurrent, 1 isolated). There was no significant increase risk of dislocation after revision surgery in the neck of femur group ( 0.467).
Conclusions: We report favourable outcomes for revision of both components for recurrent dislocation with no dislocations within 90 days. The overall late dislocation rate was 16.7%, however, these patients have settled following closed reduction. Due to its multifactorial aetiology, both component revision can be considered in this patient population.
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| http://dx.doi.org/10.1177/1120700020911146 | DOI Listing |
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