title: Total knee arthroplasty with 4.4 mm of tibial polyethylene an update.
abstract: Three hundred eighty-seven one-piece, 8-mm tibial components were implanted in 313 patients. All tibial prostheses were manufactured with 4.4 mm of polyethylene. From this group, 116 patients underwent simultaneous bilateral total knee arthroplasty with an 8-mm tibial component on one side and a tibial component with at least 6.4 mm of polyethylene on the other side. Follow-up averaged 11.8 years. The average Knee Society knee score was 81, and the average pain score was 46. No polyethylene wear or osteolysis was identified radiographically. There were 7 knees with tibial radiolucencies, 5 knees with polyethylene failure of metal-backed patellae, and 1 tibial component failure. Survival rates for loosening or revision of any component for any reason were 98.9%, 97.5%, 95.1%, and 93.2% at 5-, 10-, 15-, and 18-years, respectively.
authors.affiliation: The Center for Hip and Knee Surgery, St Francis Hospital, Mooresville, Mooresville, Indiana 46158, USA.
authors.forename: John B
authors.initials: JB
authors.lastname: Meding
authors.forename: Jennifer T
authors.initials: JT
authors.lastname: Wing
authors.forename: Merrill A
authors.initials: MA
authors.lastname: Ritter
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation* / Q000379:methods; D004185:Disability Evaluation; D004868:Equipment Failure; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D053208:Kaplan-Meier Estimate; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D011095:Polyethylenes; D011475:Prosthesis Failure; D012086:Reoperation; D013977:Tibia / Q000601:surgery; D016896:Treatment Outcome
chemical_list: D011095:Polyethylenes