title: Isolated revision of failed metal-backed patellar components: outcome with minimum 4-year follow-up.
abstract: Several reports document high failure rates of metal-backed patellar components, but few report the outcome of revising these components to all-polyethylene, cemented implants. At a mean 87.2-month follow-up, we describe a series of 36 patients (40 knees) who underwent isolated metal-backed patellar revision to a cemented, all-polyethylene patellar component. After the patellar revision, 5 patients (6 knees) underwent additional surgery, but no patellar components required revision. The additional surgeries were performed at an average of 77.6 months after patellar revision and included 3 tibial insert exchanges for polyethylene wear, 2 revisions of femoral and tibial components for osteolysis, and 1 realignment procedure for recurrent subluxation of the patella. We conclude that revision of a failed metal-backed patellar component to a cemented, all-polyethylene patella is a durable, successful procedure.
authors.affiliation: Anderson Clinic Post Graduate Medical Education Foundation, Alexandria, VA 22306, USA.
authors.forename: W Vincent
authors.initials: WV
authors.lastname: Burke
authors.forename: Deborah J
authors.initials: DJ
authors.lastname: Ammeen
authors.forename: Gerard A
authors.initials: GA
authors.lastname: Engh
mesh_terms: D019645:Arthroplasty, Replacement, Knee; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D010329:Patella / Q000601:surgery*; D011095:Polyethylenes; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D016896:Treatment Outcome
chemical_list: D011095:Polyethylenes