title: Cemented rotating-platform total knee replacement. a concise follow-up, at a minimum of fifteen years, of a previous report.
abstract: We previously evaluated 119 consecutive total knee arthroplasties that were performed in eighty-six patients with use of the cemented LCS (low contact stress) rotating-platform system with an all-polyethylene patellar component. The average age of the patients at the time of surgery was seventy years (range, thirty-seven to eighty-eight years). The purpose of this study was to report the updated results at a minimum follow-up of fifteen years. Thirty-seven patients (fifty-three knees) were living, and no patient was lost to follow-up. No knee was revised because of loosening, osteolysis, or wear. Three knees required a reoperation (two for periprosthetic fractures and one for infection). No component was revised as a part of the reoperations. Osteolysis was present in three knees. No knee had radiographic signs of component loosening, and there were no dislocated bearings. The average range of motion was from 1 degrees of extension to 105 degrees of flexion. The average clinical and functional Knee Society scores were 43 and 49, respectively, at the preoperative evaluation and 85 and 58 at the time of the final follow-up. We concluded that the cemented LCS rotating-platform knee performed well, with durable clinical and radiographic results at a minimum follow-up of fifteen years.
authors.affiliation: Department of Orthopaedics and Rehabilitation, University of Iowa College of Medicine, 200 Hawkins Drive, Iowa City, IA 52242, USA. john-callaghan@uiowa.edu
authors.forename: John J
authors.initials: JJ
authors.lastname: Callaghan
authors.forename: Michael R
authors.initials: MR
authors.lastname: O'Rourke
authors.forename: Michael F
authors.initials: MF
authors.lastname: Iossi
authors.forename: Steve S
authors.initials: SS
authors.lastname: Liu
authors.forename: Devon D
authors.initials: DD
authors.lastname: Goetz
authors.forename: David A
authors.initials: DA
authors.lastname: Vittetoe
authors.forename: Patrick M
authors.initials: PM
authors.lastname: Sullivan
authors.forename: Richard C
authors.initials: RC
authors.lastname: Johnston
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001843:Bone Cements; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D011095:Polyethylenes; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation / Q000706:statistics & numerical data; D016019:Survival Analysis; D016896:Treatment Outcome
chemical_list: D001843:Bone Cements; D011095:Polyethylenes