A COMPARISON STUDY TO EVALUATE THE RESISTANCE TO VERTICAL ROOT FRACTURE AFTER REMOVING SEPARATED INSTRUMENTS UTILIZING THREE INSTRUMENT RETRIEVAL SYSTEMS: AN IN VITRO STUDY

Abstract

Introduction: Various instrument systems have been used to retrieve distinct instruments from root canals. Nonetheless, it has long 
been noted that using the existing retrieval techniques may weaken tooth roots, increasing their vulnerability to fracture and ultimately 
the treatment's overall failure. Therefore, using Ultrasonic U Files, Ultrasonic Tip (Acteon Endo Success ET25 Retreatment Tip), or the 
Endo Rescue System under the magnifying power of a dental operating microscope, the following study was carried out to assess and 
compare the resistance to vertical root fracture following the retrieval of separated instruments from the root canal.