Abstract
Compared to early hinged prostheses (i.e., Walldius, Shiers, GUEPAR, etc.), the kinematic rotating hinge has some good innovations. Axial rotation and distraction are allowed, and flexion and extension take place between metal and polyethylene surfaces. These changes should lead to the reduction of the complications (loosening, deep infection, fracture) very often seen in early hinged prostheses.
We evaluated the clinical results of 13 knees (11 RA, 2 OA) replaced by the kinematic rotating hinge knee prosthesis since 1982. It was used for severely deformed, stiff unstable knees, for revision cases and for the adjustment of leg length discrepancy and correction of malalignment of the legs. The average follow-up period was 31 months. Clinical results were satisfactory and there were no serious complications.
