K3: Design & Structure
The cross section of a K3 instrument reveals three cutting blades with slightly positive rake angles,
followed by radial lands. Two of the radial lands have been partly reduced (Radial Land Relief) in
order to improve the cutting efficiency of the file. The safe-ended non-cutting tip of the K3
instrument follows the root canal and reduces risk of transportation.
K3 instruments have a "Variable Core Diameter", or variable flute depth. The proportion
of the core diameter to the outside diameter is greatest at the tip, where strength is most important.
The instruments also have a variable helical flute angle to reduce screwing effect.
