title: Five- to eight-year results of a prospective study in 118 arthroplasties using posterior-stabilized rotating-platform knee implants.
abstract: We prospectively enrolled 118 patients (133 knees) whose arthroplasties were performed using posterior-stabilized rotating-platform knee implants. Introduced in year 2000, this implant's performance beyond 5 years is not reported on, to date. We present 5- to 8-year (average, 6.5 years) results of 118 posterior-stabilized rotating-platform knee arthroplasties. Kaplan-Meier survival rate was 100%, considering revision or the need for it as the end point. Mean Knee Society Score improved from 27 (range, 1-54) to 96 (range, 54-100). Mean function score improved from 51 (range, 5-81) to 83 (range, 0-100). No patient had spin-out of rotating bearing or osteolysis. Postoperatively, knee flexion averaged 120° (range, 80°-155°), 34% patients achieved more than 130° flexion, and 67% patients could sit cross legged. Only 5% patients presented with patellofemoral symptoms.
authors.affiliation: Department of Orthopadic Surgery, Lilavati Hospital and Research Centre, Mumbai, India.
authors.forename: Rajesh N
authors.initials: RN
authors.lastname: Maniar
authors.forename: Himanshu
authors.initials: H
authors.lastname: Gupta
authors.forename: Ashish
authors.initials: A
authors.lastname: Singh
authors.forename: Ajay C
authors.initials: AC
authors.lastname: Johorey
authors.forename: Tushar
authors.initials: T
authors.lastname: Singhi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018771:Arthralgia / Q000453:epidemiology; D001172:Arthritis, Rheumatoid / Q000503:physiopathology / Q000601:surgery*; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation* / Q000379:methods*; D005260:Female; D006801:Humans; D015994:Incidence; D053208:Kaplan-Meier Estimate; D007719:Knee Joint / Q000503:physiopathology / Q000601:surgery; D007720:Knee Prosthesis; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000503:physiopathology / Q000601:surgery*; D011446:Prospective Studies; D011474:Prosthesis Design; D016059:Range of Motion, Articular / Q000502:physiology; D016896:Treatment Outcome