title: Outcomes of total knee replacement after patellofemoral arthroplasty.
abstract: There is increasing interest in the use of patellofemoral joint replacements and the cohort receiving them are the youngest of any of the groups of patients undergoing a knee arthroplasty. With more contemporary prostheses, progression of arthritis in other parts of the knee joint is becoming the predominant mechanism of failure. We conducted a multicenter retrospective comparative cohort study to discover whether the outcome of total knee replacement is compromised by prior patellofemoral joint arthroplasty. A total of 21 patients with a mean age of 61 years, who were revised from a patellofemoral joint replacement to a total knee replacement, were compared with a matched cohort of patients who underwent primary total knee replacement. At a mean follow-up of 2.4 years, the primary total knee replacement cohort had significantly better Oxford Knee Scores, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) function scores, pain visual analog scores, and EQ-5D scores. There was no significant difference in patient satisfaction or EQ-5D visual analog scale.Our results indicate that although the revision of a patellofemoral joint replacement to a total knee replacement is a technically straightforward procedure, the eventual outcome may be less satisfactory when compared with a primary total knee replacement.
authors.affiliation: Department of Trauma and Orthopaedics, Croydon University NHS Trust, Surrey, CR7 7YE, United Kingdom. drhutt@hotmail.com
authors.forename: Jonathan
authors.initials: J
authors.lastname: Hutt
authors.forename: Matthew
authors.initials: M
authors.lastname: Dodd
authors.forename: Henry
authors.initials: H
authors.lastname: Bourke
authors.forename: Jonathan
authors.initials: J
authors.lastname: Bell
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery; D010147:Pain Measurement; D057071:Patellofemoral Joint / Q000601:surgery*; D017060:Patient Satisfaction; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome