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52-year-old female with severe rheumatoid arthritis of the knee
4%
167/4003
73-year-old male with post-traumatic arthritis of the knee and prior patellectomy
9%
369/4003
67-year-old male with degenerative arthritis and 10 degree valgus deformity of the knee
72%
2869/4003
55-year-old male with post-traumatic arthritis of the knee 20 years after bicruciate ligament ruptures
8%
327/4003
63-year-old female with a chronic history of steroid treatment of systemic lupus erythematosus and an arthritic knee
6%
251/4003
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Posterior cruciate retaining knees require a functional PCL to produce femoral rollback during knee flexion. Posterior-stabilized knees rely on the component to produce femoral rollback. Contraindications to using a posterior cruciate retaining knee include any condition that may render the PCL incompetent at the time of surgery or in the future including prior PCL rupture, inflammatory arthritis, patellectomy, and over-release of the PCL during surgery. Valgus deformity is not a contraindication. Gonzalez et al reviews the appropriate evaluation and management of the patient with unsatisfactory results following TKA. The most common etiologies include pain, stiffness, and instability. Illustrations A and B demonstrate the differences between posterior cruciate retaining knees and posterior-stabilized knees in regards to rollback.
3.3
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