K3 Nickel-Titanium Files

Superior peripheral strength is achieved in the K3 by adding more mass behind the cutting blade. To reduce friction, the K3 also has a shallower radial land. The increase in the K3's peripheral mass prevents the propagation of cracks and reduces the chances of separations and deformation from torsional stresses.

When the blade engages on an instrument with a smaller radial land there are stresses that often lead to instrument failure.

Figure 14: Stresses due to blade engagement