Secondary knee instability caused by fracture of the stabilizing insert in a dual-articular total knee.
A case of a fractured polyethylene stabilizing insert causing secondary knee instability in a Dual-articular total knee arthroplasty (TKA) is presented. A 65-year-old woman who underwent surgery with a Dual-articular TKA 4 years earlier had a well-functioning prosthesis until a fall, after which she began complaining of an intermittent, audible clicking; pain; and instability. At surgery, a fractured polyethylene peg was discovered, and the tibial insert was replaced. At follow-up, she remains asymptomatic. This is the first description of a fractured stabilizing insert in a Dual-articular knee.
Department of Orthopaedic Surgery, H:S Hvidovre University Hospital, Hvidovre, Denmark.
Morten P
MP
Boesen
Tim Toftgaard
TT
Jensen
Henrik
H
Husted
D000058:Accidental Falls; D000368:Aged; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000209:etiology* / Q000503:physiopathology / Q000601:surgery*; D007720:Knee Prosthesis / Q000009:adverse effects*; D020959:Polyethylene; D011475:Prosthesis Failure
D020959:Polyethylene