Katana-V ultrasonic 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

Used in slow speed handpiece at 600 RPM

creating a small space adjacent to the fractured file edge

Katana-V ultrasonic The ultrasonic preparation continues untilKatana V is ultrasonic tip with flat surface that should face towards the separated file. The instrument is used (dry) to wedge into the space on the inside of the canal curve between the separated file and the canal wall, creating a small space adjacent to the fractured file edge.