Rotary Arc
Natural tibial rotation is optimized through the unique Rotary Arc, that allows internal and external rotation about a central pivot. A proprietary four-axis machining process creates a tibiofemoral design that facilitates conforming, yet functionally constrained articulation.
Traditional fixed bearing insert designs (above left) machine linear articulation troughs. The Triathlon Knee System four-axis machining process adds rotational capability to a fixed bearing insert (above right).