Abstract: The present invention describes an endodontic high-performance polymer micro-capillary cannula for use with a dental tool having an ultrasonic/sonic energy generator, and providing concomitantly irrigation, activation of the irrigation liquid and evacuation of the root canal content. The micro-capillary cannula provides continuous delivery of an irrigant from the ultrasonic or sonic handpiece while vibrating inside canal, allowing the activation of the irrigant. Energy generated by an ultrasonic or sonic generator is translated into movement of the cannula to provide optimum cleaning to the root canal. Simultaneously, negative pressure is formed at the tip end of the cannula by a tubing connection at the proximal end of the cannula, which is connected to the suction dental unit. The evacuation at the end of the cannula helps irrigant movement from the coronal part of the canal to the apical part, while avoids apical extrusion of the irrigant.

Abstract: The invention describes an additional manufacturing method to improve the metallurgical properties of an endodontic file, which method customizes torsional and cyclic fatigue resistance behavior performance for separate files sizes. A heat-treatment file size tailored method accomplished after grinding the blank is disclosed aiming to improve the elasticity behavior of the specific file size based on its application during instrumentation protocol, also generating a colored oxidation layer on the working part surface of the file. The colored coded customized heat-treatment process will help the operator to identify the improved metallurgical properties behavior of each file, and decide the best use of such files.

Abstract: Provided is a system for endodontic treatment of a root canal. The system includes a handpiece containing a rotary motor adapted to rotate an endodontic file secured by the handpiece. A control unit executes a regime of motion of the motor to produce a regime of file motion in which episodes of oscillation of the file are separated by a rotation of the file. When the arc of a rotation is less than the arc of the oscillation that preceded the rotation, the arcs of the episodes of oscillation overlap and the formation of ridges in the root canal is avoided.

Abstract: Methods and related systems for cleaning a root canal of a tooth employing a super-elastic NiTi endodontic file while applying ultrasonic energy during the cleaning procedure. Such a method may include inserting an endodontic file into a root canal of a tooth in which the file includes a working portion comprising a super-elastic NiTi alloy. The root canal is cleaned by moving the working portion of the file within the root canal so that the working portion of the file cuts or abrades tissue within the root canal. Ultrasonic energy is applied to the file, tooth, or both in order to assist in breaking up and removing necrotic tissue in the root canal during cleaning. The ultrasonic energy is applied in a manner that does not result in breakage of the file for a period of at least 3 minutes. In an embodiment, a length of the exposed portion of the file is maintained at 22 mm or more to delay file breakage.

Abstract: The discovery of a new coefficient named “Radicular Spectral Attenuation Coefficient-RSAC”, applicable in electronic foramen locators is described. The novelty is the use of the spectral attenuation of a multifrequency electrical current signal, applied through the endodontic file into the tooth canal (TC), to determine the root length and the foramen position. FIG. (2): (2.1), (2.4), (2.8) and (2.2), (2.5), (2.9) are the amplitude and frequency axes, respectively; (2.3) is the electrical current frequency spectrum applied into the TC; (2.6) shows the spectrum exponential decay (2.7) of the signal measured over the TC. In (2.10) the axes (2.4) and (2.5) were logaritmized to linearize the exponential decay. The RSAC is the average inclination of the line (2.11), which is proportional to the distance between the tip of the endodontic file and the apical foramen. The RSAC changes as the tip of the file gets near the foramen.

Abstract: Provided is a system for endodontic treatment of a root canal. The system includes a handpiece containing a rotary motor adapted to rotate an endodontic file secured by the handpiece. A control unit executes a regime of motion of the motor to produce a regime of file motion in which episodes of oscillation of the file are separated by a rotation of the file. When the arc of a rotation is less than the arc of the oscillation that preceded the rotation, the arcs of the episodes of oscillation overlap and the formation of ridges in the root canal is avoided.

Abstract: The discovery of a new coefficient named “Radicular Spectral Attenuation Coefficient-RSAC”, applicable in electronic foramen locators is described. The novelty is the use of the spectral attenuation of a multifrequency electrical current signal, applied through the endodontic file into the tooth canal (TC), to determine the root length and the foramen position. FIG. (2): (2.1), (2.4), (2.8) and (2.2), (2.5), (2.9) are the amplitude and frequency axes, respectively; (2.3) is the electrical current frequency spectrum applied into the TC; (2.6) shows the spectrum exponential decay (2.7) of the signal measured over the TC. In (2.10) the axes (2.4) and (2.5) were logaritmized to linearize the exponential decay. The RSAC is the average inclination of the line (2.11), which is proportional to the distance between the tip of the endodontic file and the apical foramen. The RSAC changes as the tip of the file gets near the foramen.