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Updated: Mar 25, 2026

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Published on: July 6, 2022
An Unusual Prepatellar Bursa Swelling: Patellar Button Dissociation and Migration
1Guys and St Thomas' NHS trust, Department of Orthopaedics, Westminster Bridge Road, London SE1 7EH, UK.
Abstract:
Implant loosening is not a new phenomenon, nor is implant migration; however they are rarely seen after knee arthroplasty surgery. Complications with patellar buttons have been reported before with peg failure, loosening, and patella fracture; however extra-articular migration is extremely rare. We report an unusual case of patellar button migration 11 years after total knee arthroplasty to the prepatellar bursa.
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