Saudi Endodontic Journal (Jan 2011)
Variable Taper Nickel-Titanium Rotary Instrument Technique
Abstract
Removal of all organic debris and microorganisms from the root canal system, and shaping the root canal space is a very important step in root canal therapy. This will facilitate adequate irrigation and filling of the entire root canal space. A number of techniques using hand instruments have been described, all of which have been designed to produce a tapered preparation. These techniques have a lot of deficiencies, but they are still considered to be the most efficient and suitable for clinical dental practice. Research into root canal preparation has led to significant changes in instrumentation techniques. New instruments have been developed, employing different metals and different engineering philosophies. There has been a significant move away from the ISO standard 2% taper instrumentation. Recent designs of endodontic instruments have variable tapers giving improved shaping ability. Nickel-titanium rotary instruments will rapidly and safely open the main root canals creating a deep space to permit full penetration of irrigant solutions. Practitioners considering changing their endodontic techniques, are advised to read the following preparation technique to gain competence before using these instruments in their clinical practice.
