Recurrent dissociation of the tibial insert after mini-subvastus posterior-stabilized total knee arthroplasty: a case report.
We report here on an unusual case of recurrent dissociation of a polyethylene tibial insert from its metal baseplate after high-flex posterior-stabilized (PS) Genesis II total knee arthroplasty with using the mini-subvastus approach. After the 1st episode of dissociation, which had happened 1 month after the primary surgery, we changed the tibial insert and found damages on the dovetails and the post of the retrieved insert. Unfortunately, the patient suffered the same dissociation 1 month after the tibial insert was changed. This case illustrates that incomplete seating of the insert due to limited surgical exposure and anterior impingement of the high-flex PS post may contribute to the risk of dissociation.
In
Yong
Y
Department of Orthopedic Surgery, Uijongbu St. Mary's Hospital, The Catholic University of Korea, Republic of Korea. iy1000@catholic.ac.kr
Sur
Yoo-Joon
YJ
Won
Ho-Yeon
HY
Moon
Young-Seok
YS
D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation* / Q000379:methods; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology / Q000601:surgery; D007720:Knee Prosthesis; D020370:Osteoarthritis, Knee / Q000601:surgery; D020959:Polyethylene; D011474:Prosthesis Design; D011475:Prosthesis Failure; D016059:Range of Motion, Articular; D012008:Recurrence; D012086:Reoperation; D013314:Stress, Mechanical; D013977:Tibia / Q000601:surgery*; D016896:Treatment Outcome
D020959:Polyethylene