Tibial post failures in a condylar posterior cruciate substituting total knee arthroplasty.
In posterior-stabilized total knee arthroplasties, a femoral cam and polyethylene tibial post are commonly used to restore posterior stability after sacrifice of the posterior cruciate ligament. This article reports a high incidence of early tibial post failures in one design of prosthesis and examines the variables that may have contributed to such. Five hundred sixty-four consecutive posterior-stabilized total knees were implanted in 512 patients, using a total knee prosthesis with a polyethylene tibial post and femoral cam. Clinical and radiographic outcomes were measured at a mean follow-up of 40 months after surgery (range, 24-83 months). At follow-up, 70 knees in 62 patients (12%) had undergone revision surgery because of symptoms related to catastrophic failure of the tibial post.
Department of Orthopaedic Surgery, University of Missouri-Columbia, Missouri 65212, USA.
B Sonny
BS
Bal
David
D
Greenberg
Stephen
S
Li
David
D
R Mauerhan
Loren
L
Schultz
Kenneth
K
Cherry
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation* / Q000379:methods; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D007593:Joint Instability / Q000209:etiology; D007720:Knee Prosthesis / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D020959:Polyethylene; D016119:Posterior Cruciate Ligament / Q000601:surgery*; D011474:Prosthesis Design / Q000009:adverse effects*; D011475:Prosthesis Failure; D011859:Radiography; D012307:Risk Factors; D013977:Tibia / Q000000981:diagnostic imaging / Q000601:surgery*; D016896:Treatment Outcome
D020959:Polyethylene