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EP-4736805-A2 - END CUT OF ENDODONTIC BRUSH

EP4736805A2EP 4736805 A2EP4736805 A2EP 4736805A2EP-4736805-A2

Abstract

In some embodiments, the distal end of an endodontic brush unevenly (e.g., not along a line perpendicular to the axis of the brush). Optionally, the uneven strands will contact the walls of a channel more evenly and/or will have an increased stirring effect than an evenly cut end may be cut using an abrasive cutter (e.g., a grinding wheel) and/or a laser and/or an electrical discharge machining (EDM) cutter. Optionally, a grinding wheel will rotate opposite the winding of the wire. Optionally, a rounded end may be formed on the wire. In some embodiment, a coupling between an endodontic brush and a handpiece is configured to be held rotationally to the handpiece by friction and/or locked longitudinally into the handpiece by an interference element. In some embodiments, an edge of the brush is roughened. Optionally, the brush may be bent and/or eccentric.

Inventors

  • BECKER, ARIE
  • GULKAROV, Zvika

Assignees

  • MDT Micro Diamond Technologies Ltd.

Dates

Publication Date
20260506
Application Date
20210307

Claims (11)

  1. A kit for endodontic cleaning comprising: a sterile eccentric endodontic file including a proximal handle configured for attachment to a dental handpiece to rotate around an axis of rotation and a flexible cleaning rod having a distal active section configured for rotating in an inside of an endodontic canal to cleaning the inside of the canal; the cleaning rod distal to said handle wherein a distance between the axis of rotation and an unstressed local center of mass of the distal active section is greater than half a radius of the handle; and a sterile packaging preserving the sterility of said sterile eccentric endodontic file.
  2. The kit of claim 1, wherein said distance between the axis of rotation and said unstressed local center of mass of the distal active section is greater than a radius of the handle.
  3. The kit of claim 1, wherein said flexible cleaning rod includes an inner wire core and a spiral wire wrapped around said inner core.
  4. The kit of claim 3, wherein said flexible cleaning rod further includes an outer spiral wrapping wrapped around said spiral wire.
  5. The kit of claim 4, wherein said outer spiral wrapping has a rough surface for cleaning the inside of said canal.
  6. The kit of claim 5, wherein said handle has a mean center of mass, the sterile eccentric endodontic file further including: a transition section distal to said handle and proximal to said active section wherein a distance between the axis of rotation and an unstressed local center of mass of the file increases distally; wherein said active section extends from said transition section to a distal tip, wherein an unstressed local center of mass of the active section is constantly on the same side of said axis of rotation and a distance between the axis of rotation and said unstressed local center of mass of the active section is greater than said a distance between said center mass of the handle and the axis of rotation.
  7. A method of production of an endodontic file comprising: providing a sterile eccentric endodontic file including a proximal handle configured for attachment to a dental handpiece to rotate around an axis of rotation said handle having a mean center of mass and a flexible cleaning rod having a distal active section configured for rotating inside an endodontic canal to cleaning the inside of the canal; the cleaning rod distal to said handle wherein a distance between the axis of rotation and an unstressed local center of mass of the distal active section is greater than half a radius of the handle; and sterilizing said eccentric endodontic file; and packing said endodontic file in a sterile state in a sterility preserving packaging.
  8. The method of claim 7, wherein said distance between the axis of rotation and said unstressed local center of mass of the distal active section is greater than a radius of the handle.
  9. The method of claim 7, wherein said flexible cleaning rod includes an inner wire core and a spiral wire wrapped around said inner core.
  10. The method of claim 9, wherein said flexible cleaning rod further includes an outer spiral wrapping wrapped around said spiral wire.
  11. The method of claim 10, wherein said outer spiral wrapping has a rough surface for cleaning the inside of said canal.

Description

RELATED APPLICATION/S This application claims the benefit of priority under 35 USC §119(e) of U.S. Provisional Patent Application No. 63/108,363 filed Nov. 1, 2020, the contents of which are incorporated herein by reference in their entirety. This application claims the benefit of priority under 35 USC §119(e) of U.S. Provisional Patent Application No. 62/988,453 filed March 12, 2020, the contents of which are incorporated herein by reference in their entirety. FIELD AND BACKGROUND OF THE INVENTION The present invention, in some embodiments thereof, relates to an endodontic brush and, more particularly, but not exclusively, improved forming of the distal end of thereof. US Patent no. 8790116 with inventors overlapping the present application appears to disclose, "An endodontic file (10) has at least a central longitudinal cord (12), a helically wound wire (14) at least partially surrounding the cord and an elastomeric grip (16) partially covering the helically wound wire near a first end thereof and having an outer diameter that is slightly wider than an internal diameter of a barrel of a dental instrument whereby on insertion into the barrel it is supported therein only by friction." U.S. Patent no. 9585731 appears to disclose that "An endodontic file (10) has a handle (11) and a spiral cord (15) of helically wound metallic wire wound in a predetermined direction around a central metallic cord (13) formed between opposite ends of the central cord so as to form an integrated structure (18) of generally conical cross-section including a narrow tip end (17) and an opposite wider upper end (16) supported at the upper end by the handle. A flexible conical reinforcement (26, 31) supported by the handle covers an outermost layer of an upper portion of the spiral cord remote from the tip end, its lower end being of sufficiently low diameter to enter the root canal and dimensioned at its upper end to limit bending of the upper portion. An outer surface (20) of the spiral cord is configured for removing material from inside the root canal when the endodontic file is rotated in the predetermined direction." U.S. Patent no. 8,647,116 appears to disclose that "An endodontic file (10) has at least a central longitudinal cord (12), a helically wound wire (14) at least partially surrounding the cord and an elastomeric grip (16) partially covering the helically wound wire near a first end thereof and having an outer diameter that is slightly wider than an internal diameter of a barrel of a dental instrument whereby on insertion into the barrel it is supported therein only by friction." U.S. Patent Publication no. 20140004479 appears to disclose, "An endodontic instrument for drilling the root canals of a tooth. The instrument comprises a working area for forming and/or shaping and/or cutting the wall of the root canal of the tooth. The working area is provided with a supporting endpiece that can be attached to a manual or mechanically driven mounting. The working area is arranged so as to assume a stowed configuration when the instrument is in an inoperative position to the working position, and vice versa, being cause by a predetermined variation in the temperature of the instrument. To this end, the working area is made from a wire of a metal alloy having shape-memory properties or particular elasticity properties." U.S. Patent no. 9931179 appears to disclose, "A method of forming a dental tool or instrument having a memorized shape. The method comprises selecting a nitinol wire having an initial transition temperature below room temperature: grinding the nitinol wire to form the dental tool or instrument so as to have a shank, located adjacent a first end, and a working area, with at least one cutting edge, located adjacent an opposite second leading end; molding the working area into a molded shape having at least one protrusion formed therein: heating the dental tool or instrument to both: a) alter the initial transition temperature of the dental tool or instrument to a final transition temperature, and b) memorize the Molded shape including the at least one protrusion so that the dental tool or instrument will automatically return to the molded shape having the at least one protrusion when at a temperature at or above the final transition temperature." Tuan Anh Nguyen, Yaelim Kim, Euiseong Kim, Su-Jung Shin and Sunil Kim; Comparison of the Efficacy of Different Techniques for the Removal of Root Canal Filling Material in Artificial Teeth: A Micro-Computed Tomography Study, J. Clin. Med. 2019, 8(7), 984; https.//doi.org/10.3390/jcm8070984. Appear to disclose a "Study aimed to assess the efficacy of canal filling material removal using three different techniques after filling with a Gutta-Percha (GP) cone and calcium silicate-based sealer, by measuring the percentage of volume debris of GP and sealer remaining intracanal with micro computed tomography (micro-CT). The filling material was removed from 30 plastic teeth b