Protaper Root Canal file D1,D2,D3

These are a set of three files used during the re-treatment of Root Canal Treated teeth. Three Files are : D1 - tip size 30 and a taper of 9% - used in coronal third of the canal - has a cutting tip D2 - tip size 25 and a taper of 8% - used in the middle third of the canal - has a non-cutting tip D3 - tip size 20 and a taper of 7% - used in the apical third of the canal - has a non-cutting tip They are made of Ni-Ti alloy.