title: Patellofemoral function after total knee arthroplasty: a comparison of 2 posterior-stabilized designs.
abstract: Knee complications and function were analyzed in patients with 2 different posterior-stabilized total knee arthroplasty (TKA) designs, Optetrak 913 and Insall-Burstein II. Three hundred Insall-Burstein II knees with mean follow-up of 8 years (range: 5-9 years) and 300 Optetrak knees with mean follow-up of 6 years (range: 5-7 years) were studied. Lateral retinacular release was performed in 30% of Insall-Burstein II patients and 16% of Optetrak patients (P = 0.001), and patellar clunk was 4% for the Insall-Burstein II prosthesis and 0.3% for the Optetrak prosthesis (P = 0.003). No statistically significant differences in dislocation, fracture, or loosening rates were observed between the 2 groups. Knee Society scores were similar in 2 groups of 50 patients brought back to the office. Mean Knee Society knee scores were 92 and 94 for the Insall-Burstein II and Optetrak groups, respectively (P > 0.05), and function scores were 80 and 84 for the 2 groups, respectively (P > 0.05). At mid-term follow-up, Optetrak patients were less likely than Insall-Burstein II patients to require lateral retinacular release and experience patellar clunk.
authors.affiliation: Hospital for Special Surgery, New York, NY, USA.
authors.forename: John A
authors.initials: JA
authors.lastname: Anderson
authors.forename: Andrea
authors.initials: A
authors.lastname: Baldini
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Sculco
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D015331:Cohort Studies; D005260:Female; D006801:Humans; D007592:Joint Diseases / Q000473:pathology / Q000503:physiopathology / Q000601:surgery; D007719:Knee Joint / Q000503:physiopathology*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010329:Patella; D011474:Prosthesis Design; D020127:Recovery of Function / Q000502:physiology*; D012189:Retrospective Studies; D016896:Treatment Outcome