MECHANIZED ROOT CANAL ENLARGEMENT SYSTEM 200% increased fracture resistance Increased cutting ability and corrosion resistance The first 4 files of the SV/PG/E1/E2 protocol have high resistance due to thermal treatment, while the remaining E3/E4 files offer a safe transition to the apex due to their high modulus of elasticity. As a result, this system provides double resistance during root canal preparation and maximum elasticity simultaneously, offering low cost and effectiveness.