title: Tibial fixation without screws in cementless knee arthroplasty.
abstract: This study reexamines the clinical and radiologic results of the first 216 cases of a cementless fixed-bearing tibial tray without screw holes in 191 patients at 7.6-year follow-up (range, 5-10 years). Mean Hospital for Special Surgery scores improved from 54/100 preoperatively to 84/100 postoperatively. Four tibial baseplates were revised. Five polyethylene inserts were revised. The overall reoperation rate was 12%. Four percent of tibial baseplates had incomplete nonprogressive radiolucent lines involving 1 or 2 of 10 defined zones. Overall tibial osteolysis rate was 4.1%. All tibial components were stable by radiographic technique. We conclude that this tibial tray provides reliable stability without the use of screws at medium-term follow-up. The polyethylene failure rate is a concern.
authors.affiliation: Sydney Hip & Knee Surgeons, Sydney, Australia.
authors.forename: Ian P
authors.initials: IP
authors.lastname: Holloway
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Lusty
authors.forename: William L
authors.initials: WL
authors.lastname: Walter
authors.forename: William K
authors.initials: WK
authors.lastname: Walter
authors.forename: Bernie A
authors.initials: BA
authors.lastname: Zicat
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects / Q000379:methods*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010014:Osteolysis / Q000209:etiology / Q000601:surgery; D017060:Patient Satisfaction; D020959:Polyethylene; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation; D016019:Survival Analysis; D013977:Tibia / Q000601:surgery*
chemical_list: D020959:Polyethylene