title: Failure of the all-polyethylene patellar component after total knee arthroplasty.
abstract: From 1991 to 1996, 953 cases of porous-coated anatomic modular knee prostheses with all-polyethylene patellar components were implanted. Among them, 4 cases had breakage of the patellar component at the peg-button interfaces. One had loosening of the patellar component by cutting out the patellar bony bed. Heavy body weight, weakness of the pegs of the all-polyethylene patellar component, and osteonecrosis of the patella were conceived as the causes of failure.
authors.affiliation: Department of Orthopaedic Surgery, Mackay Memorial Hospital, Taipei, Taiwan, ROC.
authors.forename: C H
authors.initials: CH
authors.lastname: Huang
authors.forename: Y M
authors.initials: YM
authors.lastname: Lee
authors.forename: J H
authors.initials: JH
authors.lastname: Lai
authors.forename: J J
authors.initials: JJ
authors.lastname: Liau
authors.forename: C K
authors.initials: CK
authors.lastname: Cheng
mesh_terms: D000368:Aged; D001843:Bone Cements; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010020:Osteonecrosis / Q000150:complications; D010329:Patella; D020959:Polyethylene; D011474:Prosthesis Design; D011475:Prosthesis Failure
chemical_list: D001843:Bone Cements; D020959:Polyethylene