Isolated patellar revisions for failed metal-backed components: 2- to 9-year follow-up.
Results of isolated patellar revisions for failed metal-backed patellae remain controversial. Isolated patellar revisions from April 1993 to April 2000 were assessed for complication rates, the Knee Society score (KSS), implant survival, and radiological loosening. Twenty-nine knees were revised in patients aged 71.0 years (range, 61-87; SD, 6.2). At 67.0 months (range, 24-98 months; SD, 22.0), no patient underwent further revision. Knee scores improved by 26.5 (range, 9.0-44.0; SD, 10.9) while function scores improved by 25.0 (range, 0-50.0; SD,14.5) over prerevision values. Early complications included 3 superficial wound infections, 1 hematoma, and a urinary tract infection in 1 patient. One patient had a subluxed patella. One patient had asymptomatic femoral osteolysis on radiological evaluation. Isolated patellar revisions can be performed in low-demand, elderly patients with minimal patellar maltracking.
Adult Reconstruction Service, Department of Orthopaedic Surgery, Singapore General Hospital, Singapore.
Joyce S B
JS
Koh
Seng-Jin
SJ
Yeo
Ngai-Nung
NN
Lo
Ser-Kiat
SK
Tan
Boon-Keng
BK
Tay
Kang-Hong
KH
Seow
D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010329:Patella / Q000000981:diagnostic imaging / Q000601:surgery*; D011183:Postoperative Complications; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation; D016896:Treatment Outcome