The INDY-300, INDY-400 and INDY-500 are used in the coronal, middle and apical one-thirds of roots. Each instrument gets progressively smaller in the cross-sectional diameter and longer in overall length. The three sizes allow the clinician greater control as the instruments are selected according to safe access and depth of the procedure.
Uses include:
Trephine around posts
Chasing calcified canals
Eliminating brick-hard paste-type material
Broken instrument removal, and other intra-canal obstructions