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Re-dislocation after revision total hip arthroplasty for recurrent dislocation: a multicentre study.
Kensei Yoshimoto1, Yasuharu Nakashima2, Shigeo Aota3
1Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
Recurrent dislocation after total hip arthroplasty (THA) revision remains high at 18.2%. Risk factors include femoral head osteonecrosis and small head size (<32mm). Larger head sizes (≥32mm) are recommended.
Area of Science:
- Orthopedic Surgery
- Arthroplasty Research
Background:
- Recurrent dislocation after total hip arthroplasty (THA) often necessitates surgical intervention.
- Revision THA aims to address persistent dislocation issues.
Purpose of the Study:
- To evaluate the re-dislocation rate following revision THA for recurrent dislocation.
- To identify independent risk factors contributing to re-dislocation after revision THA.
Main Methods:
- Retrospective review of 88 hips undergoing revision THA for recurrent dislocation across five institutions (1995-2014).
- Multivariate logistic regression analysis to determine risk factors for re-dislocation.
- Mean follow-up of 53.1 months.
Main Results:
- A re-dislocation rate of 18.2% (16/88 hips) was observed at a mean of 25.5 months post-revision.
- Independent risk factors for re-dislocation included osteonecrosis of the femoral head (OR=5.62) and femoral head size < 32 mm (OR=3.86).
- Eight hips required further revision THA due to re-dislocation.
Conclusions:
- The re-dislocation rate after revision THA for recurrent dislocation is notably high.
- Preventive strategies are crucial, with a recommendation for using femoral head sizes ≥ 32 mm.
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