4 Key Points on Flex-R File:

4 Key Points on Flex-R File:

Flex-R file was developed in 1985 by Roane’s for use in the “Balanced Force Technique”.

1. The file is made by removing sharp cutting surface at the tip of cutting edge so the tip rides along the canal rather than the gauge (stuck) into it. This design eliminates the possibility of ledge (block) formation or canal transportation.

2. Triangular in cross section. Flutes are sharper with less negative rake angle.

3. Clockwise rotation with anticlockwise rotation and apical pressure create less canal blockage and less extruded apical debris than step back technique.

4. It is mainly advocated for curved canals.