MACHINE-DRIVEN 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 strength 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 the resistance during root canal preparation and maximum flexibility simultaneously, offering low cost and efficiency