RETREAMENT FILES (R -ENDO AND M -TWO-R)

The R-Endo system, which consists of three size-25 instruments, the R1, R2 and R3 with 0.08, 0.06 and 0.04 tapers, respectively, is designed to work in each root canal third. .

The Mtwo-R file sizes 15 and 25, both with 0.05 taper, were designed with two blades, a tighter pitch that increases in the distal direction and an active point for easy penetration.

REF:IEJ ,2011