F File: Plastic Endodontic Rotary Finishing File Advantage Over Ultrasonic Units?

Dr. A. asks:
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I do a lot of endo in my general practice and I use a microscope and basically the same equipment that an endodontist uses. I recently saw an advertisement for a new type of finishing file made of a plastic polymer. This file is supposed to replace the need for finishing off with an ultrasonic file. It does not enlarge the canal. I would like to get rid of my ultrasonic unit because it is time consuming and expensive to maintain. But does it work? The advertisement did not have any references to the literature. Does anybody have any experience with this plastic finishing file?

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