title: An Unusual Prepatellar Bursa Swelling: Patellar Button Dissociation and Migration.
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.
authors.affiliation: Guys and St Thomas' NHS trust, Department of Orthopaedics, Westminster Bridge Road, London SE1 7EH, UK.
authors.forename: Thomas
authors.initials: T
authors.lastname: Hester
authors.affiliation: Darent Valley Hospital, Darenth Wood Road, Dartford, Kent DA2 8DA, UK.
authors.forename: Farid
authors.initials: F
authors.lastname: Moftah