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Role of capsular repair on dislocation in revision total hip arthroplasty
D J Chivas1, K Smith, M Tanzer
1Division of Orthopaedic Surgery, McGill University, Montreal, Canada.
Insights
Closing the posterior capsule during revision total hip arthroplasty (THA) significantly reduces dislocation risk. This technique, combined with proper alignment and soft tissue repair, enhances hip stability post-surgery.
Area of Science:
- Orthopedic Surgery
- Arthroplasty Research
- Biomechanical Engineering
Background:
- Dislocation is a frequent complication following revision total hip arthroplasty (THA).
- The posterior capsule is often excised during revision THA for visualization, potentially compromising joint stability.
- The role of posterior capsule preservation in preventing dislocation after revision THA is under-investigated.
Purpose of the Study:
- To evaluate the efficacy of posterior capsule closure in reducing dislocation rates after revision THA.
- To determine if meticulous posterior capsule repair impacts hip stability and dislocation incidence.
- To assess the overall safety and effectiveness of a posterolateral approach with posterior capsule management.
Main Methods:
- Retrospective review of 69 patients (79 hips) undergoing revision THA via a posterolateral approach.
- Systematic closure of the posterior capsule and reattachment of external rotators.
- Minimum follow-up of 24 months (mean 57 months) to assess for dislocations and subluxations.
Main Results:
- A low dislocation rate of 2.5% (2 hips) was observed.
- Both dislocations occurred anteriorly in the early postoperative period, attributed to implant malposition and high-risk factors.
- No posterior dislocations or reported hip subluxations occurred in the study cohort.
Conclusions:
- Meticulous posterior capsule closure is a critical factor in minimizing dislocation after revision THA.
- Combining posterior capsule repair with balanced soft tissues and correct implant alignment significantly reduces dislocation risk.
- This approach offers a viable strategy to improve outcomes and stability in revision hip arthroplasty procedures.
Abstract:
Dislocation remains one of the most common complications after revision total hip arthroplasty (THA). In contrast to primary THA the posterior capsule has been routinely excised to provide better visualization, but its role in preventing dislocation has been overlooked. We reviewed 69 patients (79 hips) patients who had revision THA with a posterolateral approach to determine if closing the posterior capsule resulted in a fewer dislocations. We followed the patients for a minimum of 24 months (mean 57 months, range, 24-120 months). Two (2.5%) hips dislocated. Both dislocated anteriorly in the immediate postoperative period. One dislocation was from implant malposition and the other occurred in a high risk patient. There were no posterior dislocations and no patients reported any hip subluxation. The historically high dislocation rates with the posterolateral approach can be reduced by carefully balancing soft tissues, ensuring correct implant alignment, meticulously closing the posterior capsule, and reattaching the external rotators.
