The principles of techniques for cleaning root canals
Review
Keywords:
nickel-titanium alloy, root canal instrumentation, rotary preparation, irrigation, endodonticsAbstract
Chemomechanical root canal preparation involves both mechanical instrumentation and antibacterial irrigation, and is aimed primarily at removing microorganisms from the root canal system. For this essential step of root canal therapy, a number of devices and procedures have been developed and described. Nickel-titanium (NiTi) rotary devices have been a standard in clinical endodontics since their debut in 1988 because of their excellent ability to form root canals with possibly fewer procedural problems. Basic metallurgy of the alloy, including fracture processes and their relevance to canal anatomy, is required for safe clinical use of NiTi devices. This study examines the biological principles of root canal preparation, with a focus on the proper use of contemporary rotary NiTi instrumentation techniques and systems. The role and properties of contemporary root canal irrigants is also discussed.
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