Katana-H The ultrasonic preparation continues until

The ultrasonic preparation continues until the movement of the broken instrument is confirmed under the 4 magnification

Tiny cylinder with cutting blades on its tip to create a trough 1 mm deep around the coronal portion of the separated file

Katana-V is ultrasonic tip with flat surface that should face towards the separated file

creating a small space adjacent to the fractured file edge

Katana-H The ultrasonic preparation continues untilED89(TFRK Katana H) tips usually cut only a quarter slot of the circle. The ultrasonic preparation continues until the movement of the broken instrument is confirmed under the 4 magnification.