Total knee replacement using the Genesis II prosthesis: a 5-year follow up study of the first 100 consecutive cases.

One hundred consecutive patients with osteoarthritis undergoing knee replacement using a prosthesis with asymmetrical posterior condyles and an asymmetrical tibial base plate (Genesis II) were followed for a minimum of 5 years after surgery. Mean flexion was 118 degrees. Seventy nine percent of the patients could ascend and descend stairs in a reciprocal manner. A lateral retinacular release was required in only three patients. Post-operative patellar tracking was excellent as determined by both patellar displacement and patellar tilt. There was excellent flexion space stability using this prosthesis configuration without having to resort to external rotation of the femoral component. Tibial coverage was obtainable in >95% of the knees due to the asymmetric configuration of the base plate. Kaplan Meir Survivorship was 98% at 5 years.