HyFlex? Controlled Memory NiTi Files have been manufactured utilizing a unique process that controls the material?s memory. HyFlex CM files can be used with crown-down, step-back or recommended single length technique. 300% more resistance to separation HyFlex CM NiTi files with Controlled Memory are up to 300% more resistant to cyclical fatigue compared to other NiTi files which substantially helps reduce the incidence of file separation. No rebound extreme flexibility = Superior canal tracking HyFlex Controlled Memory NiTi files have been manufactured utilizing a unique process that controls the material?s memory, making the files extremely flexible, but without the shape memory of other NiTi files. This gives the file the ability to follow the anatomy of the canal very closely, reducing the risk of ledging, transportation or perforation. Regains shape after sterilization = Multi-use The shape and strength of files with straightened spirals can be restored during autoclaving and reused. Files not returning to original shape should be discarded.