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Risk factors for dislocation after revision total hip arthroplasty
Nathan G Wetters1, Trevor G Murray, Mario Moric
1Department of Orthopaedic Surgery, Rush University Medical Center, 1611 West Harrison Street, Suite 300, Chicago, IL 60612, USA. nwetters@gmail.com
Clinical Orthopaedics and Related Research
|September 8, 2012
Summary
Dislocation is a common complication after revision total hip arthroplasty (THA). Previous dislocation, abductor deficiency, and acetabular bone loss increase risk, while larger femoral heads may offer protection.
Area of Science:
- Orthopedic Surgery
- Arthroplasty Research
- Biomedical Engineering
Background:
- Dislocation is the most frequent complication following revision total hip arthroplasty (THA).
- Risk factors contributing to dislocation after revision THA remain incompletely understood.
- Identifying these factors is crucial for improving patient outcomes.
Purpose of the Study:
- To determine the overall risk of dislocation after revision THA.
- To identify patient-related risk factors predicting dislocation.
- To identify surgical variables predicting dislocation.
Main Methods:
- A cohort of 1211 revision THAs was analyzed.
- Patient demographics, surgical details, and dislocation events were recorded.
- Multivariate logistic regression identified risk factors for dislocation.
Main Results:
- The overall dislocation rate was 9.8% (113 patients).
- Predictors of dislocation included prior dislocation history, abductor deficiency, and Paprosky acetabulum class.
- Larger femoral head size was associated with a reduced risk of dislocation.
Conclusions:
- Dislocation remains a significant complication after revision THA.
- Patient history and acetabular bone loss are key risk factors.
- Surgical planning should consider these factors to minimize dislocation risk.
