BRKEN file removal tips

Description

Use ED88 (Katana-H) and ED89 (Katana-V) to create thin space between the inner wall and the broken le. Direct the at suace of the tip to the broken le from the inner wall and activate ultrasonics as it is placed in the space. The depth of the space should be at least one third of the length of the broken le. When the cuature is greater than 30 degrees, a drop of medical-grade silicone oil is placed in the canal to facilitate lubrication and loosening of the broken le. The depth of the space on this condition should be at least half the length of the broken le. Use ED87 (TFRK-S) to extend the 90-degree semicircular space to 180 degrees until the broken le is seen “dancing” (moving from the original space to another) under magnication. In clinical practice, the tip is used in pecking and pulsing motions to prevent the accident. Do not press the tip against the canal and activate ultrasonics because the tip will break due to cyclic fatigue. In order to laterally extend the space, the tip must be used in an up/down motion to cut dentin, not sideways.After preparation is completed, use the ultrasonic tip used when the broken le was made to “dance” to make ultrasonic removal attempts. First, 17% EDTA is lled in the canal when the canal cuature is 30 degrees or less than 30 degrees, or vegetable oil such as soybean oil when the canal cuature is greater than 30 degrees. Place the ultrasonic tip into the space created on the inner wall and activate ultrasonics in a sho veical stroke within the prepared space until it is seen coming out of the canal.The tip is characterized by an extremely sharp cone-shaped head: 0.1 mm diameter and 0.01 taper.（can be pre-cued according to the degrees of the root canal cuature） The ultrasonic tips are designed with an extremely thin sword-shaped head. Activate ultrasonics with the at suace directed to the broken le from the inner wall of the canal（can be pre-cued according to the degrees of the root canal cuature） Feature1： Extend the grooved space until the broken le is seen dancing after the creation of the 90-degree semicircular space on the inner wall with either Katana-V or Katana-H Feature 2：Remove the broken le Feature 3： Create a thin space for the introduction of the hand gutta-percha removal instrument and remove gutta-percha root lling