Failure of the all-polyethylene patellar component after total knee arthroplasty.
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.
Huang
C H
CH
Department of Orthopaedic Surgery, Mackay Memorial Hospital, Taipei, Taiwan, ROC.
Lee
Y M
YM
Lai
J H
JH
Liau
J J
JJ
Cheng
C K
CK
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
D001843:Bone Cements; D020959:Polyethylene