In a study from 2015, Triathlon patients exhibited gait that closely mimicked that of healthy control subjects. However, the multi radius knee differed from controls in important knee kinetic and kinematic properties.84 The single radius knees had a significantly greater percentage of the stance phase where muscles were firing independently when compared to the single multi radius design. Another fluoroscopic study on Triathlon patients showed the femoral component was kinematically stabilized in mid-flexion ranges and posterior femoral rollback occurred in deeper knee flexion with this knee design.85
Multiple studies88,90 and joint registries87,89 from around the world consistently show high rates of survivorship with Triathlon.
Patented sequential irradiation and annealing process39 allows for:
Increased survivorship with X3 was supported by multi center study and joint registry reported at 5 years follow up.96