Patients affected by the 1950 poliomyelitis outbreak are now approaching an age where degenerative knee changes are impacting their quality of life.
These patients often have global instability and significant hyperextension deformity and require a hinged prosthesis. Any less constrained components put the patient at risk for continued instability and early failure.
Patients with maintained antigravity strength in the operative limb may have improved outcomes in the setting of post-polio syndrome.