The Logic RT Retreatment Files system is a rotary nickel-titanium file used for the safe and efficient removal of gutta-percha in endodontic retreatment procedures.

The use of RT files presents crucial advantages for endodontic reintervention, as they remove approximately 90% of the endodontic filling material without the use of solvents, eliminating the need for other tools such as Gates Glidden drills or similar instruments.

RT files should only be used for the removal of gutta-percha. They follow a Crown Down protocol, meaning they are used from the largest to the smallest (#.30/10; #.25/08; #.20/06).