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Patellar component resection arthroplasty for the severely compromised patella.
Javad Parvizi1, Michael J Seel, Arlen D Hanssen
1Mayo Clinic/Mayo Foundation, Rochester, MN 55905, USA.
Clinical Orthopaedics and Related Research
|April 16, 2002
Summary
Patellar component resection arthroplasty significantly improves pain and function in revision knee surgery when new patellar components cannot be implanted. However, isolated procedures may lead to continued pain and reoperation.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Reconstructive Surgery
Background:
- Severe bone loss in revision knee arthroplasty often prevents new patellar component implantation.
- Alternative treatments include bone grafting, resection arthroplasty, and patellectomy.
Purpose of the Study:
- To evaluate clinical and functional outcomes of patellar component resection arthroplasty.
- To assess this procedure for severely compromised patellae where new component insertion is not feasible.
Main Methods:
- Retrospective analysis of 35 knees (31 patients) undergoing patellar component resection arthroplasty.
- Average follow-up of 7.9 years for aseptic patellar component failure with compromised bone stock.
Main Results:
- Significant improvements observed in Knee Society pain and function scores.
- Pain relief was more pronounced than functional improvement; range of motion improved, resolving extensor lag in most patients.
- Isolated patellar resection was associated with higher rates of persistent pain and reoperation compared to combined component revisions.
Conclusions:
- Patellar component resection arthroplasty offers significant pain relief and functional improvement in select cases of severe patellar compromise during revision knee arthroplasty.
- Careful assessment and potential revision of tibial and femoral components are crucial during patellar resection arthroplasty to optimize outcomes and minimize reoperation risk.