Revision total knee arthroplasty: how much constraint is enough?
Revision total knee arthroplasty is a complex situation that requires meticulous technique to restore a functional outcome. The surgical objective is the same as primary total knee arthroplasty: restore the original anatomy, restore function, and provide a stable joint. To this point of stability, it is preferable to implant the prosthesis with the least degree of constraint. Therefore, in the majority of patients undergoing revision surgery, a posterior-stabilized articulation is used. However, if there is functional loss of the medial collateral ligament or lateral collateral ligament, inability to balance the flexion and extension spaces, or a severe valgus deformity, then a constrained condylar prosthesis is necessary.
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Insall Scott Kelly Institute for Orthopedics and Sports Medicine, New York, NY 10128, USA.
D019645:Arthroplasty, Replacement, Knee; D006801:Humans; D007720:Knee Prosthesis; D011474:Prosthesis Design; D012086:Reoperation; D016896:Treatment Outcome