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Abstract
The newly released ESX rotary system (Brasseler USA, Savannah, GA) represents an evolution of the EndoSequence system (Brasseler) with an improved design and streamlined protocol. This study compared the cutting efficiency of three rotary instrument systems: ESX, EndoSequence and ProFile (Dentsply, Tulsa, OK) using the TrueTooth Replica (Dental Education Laboratories, Santa Barbara, CA).