![]() Finally, mechanical systems are identified as to whether a single-file or a multifile sequence is required to shape a canal.įigure 2. Additionally, a file is categorized as to whether it has a centered or offset mass of rotation, works with a rotary or reciprocating motion, and in the instance of reciprocation, whether the clockwise (CW) and counterclockwise (CCW) angles are equal or unequal. Further, it is useful to know whether a file has benefited from heat treatment, as this technology improves flexibility and the resistance to cyclic fatigue. ![]() Most shaping systems are described by whether any given file has active or passive cutting edges, a fixed or variable taper along its active portion, or a more traditional or unique cross-sectional design. ![]() Pre- and post-treatment images, with WaveOne (DENTPLY Tulsa Dental Specialties ) shapes, EndoActivator (DTDS) disinfection, and 3-D filling (courtesy of Dr. 2 Regardless of the preparation philosophy, methods should be utilized that promote the exchange of irrigant, 3-D disinfection, and filling root canal systems (Figure 1).įigure 1. 1 Certainly, the cost associated with preparing any given canal is a factor that is influenced by the market, and the clinical and business practice models. Clinically, the shaping experience is measured by safety, cutting efficiency, and the fewest number of files required to minimally or fully prepare a root canal. Altruistically, the most important factor should be the desire to produce a predictably successful shaping result. ![]() INTRODUCTION There are many factors that serve to influence which endodontic mechanical file system or hybrid technique is selected to prepare any given canal. ![]()
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