Simultaneous Shaping Mtwo cuts both on penetration and laterally. The instrument advances automatically from coronal towards apical, supported by the brushing file movement.
The brushing file movement is used, when resistance is felt during progression. The instrument is pulled back 1 - 2 mm and the file is used in a brushing movement with light lateral pressure against the canal wall. This creates space for the instrument to progress automatically towards apical without pressure involved. The root canal is thus prepared to full working length by each instrument.
