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EP-4117572-B1 - END CUT OF ENDODONTIC BRUSH

EP4117572B1EP 4117572 B1EP4117572 B1EP 4117572B1EP-4117572-B1

Inventors

  • BECKER, ARIE
  • GULKAROV, Zvika

Dates

Publication Date
20260513
Application Date
20210307

Claims (8)

  1. An endodontic brush comprising: a proximal handle (2202) for coupling to a handpiece; a central longitudinal flexible core (1206) supported at a handpiece end by said proximal handle (2202); a tip (102) of the core (1206) including a plurality of strands being wound in a winding direction and unbonded so that during use when the brush is rotated in a direction opposite to said winding direction the strands unwind and open to form a brush, and wherein said tip (102) is cut along a line directed at an acute angle to an axis of the core (1206); and a helical wire (1208) at least partially surrounding the core (1206) and extending toward a tip (102) of the core (1206) opposite the handle end and wherein the tip (102) protrudes beyond the helical wire (1208) at the tip (102), characterized by the distal portion (1262) of the helical winding (1208) is unwound and oriented parallel to said longitudinal flexible core (1206).
  2. The endodontic brush wherein a surface of said helical wire (1208) is roughened.
  3. The endodontic brush of claim 1, wherein said distal portion (1262) of said helical wire (1208) narrows laterally with respect to an intermediate portion of the wire proximal thereto.
  4. The endodontic brush of claim 2, wherein an intermediate portion of said endodontic brush is bent.
  5. The endodontic brush of claim 1, wherein said tip (102) is cut along a line directed at an angle of between 10 to 80 degrees to an axis of the core (1206).
  6. The endodontic brush of claim 1, wherein said tip (102) is cut using an abrasive cutter.
  7. The endodontic brush of claim 1, wherein a proximal portion of the flexible core (1206) is bent inside said proximal handle (2202).
  8. The endodontic brush of claim 1, wherein a surface said helical wire (1208) is roughened.

Description

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, including a proximal handle for coupling to a handpiece, a central longitudinal flexible core supported at a handpiece end by the proximal handle, a helical wire at least partially surrounding the core and extending toward a tip of the core opposite the handle end and wherein the tip protrudes beyond the helical wire at the tip, characterized by winding on a distal end of a helical wire oriented parallel to a longitudinal flexible core. 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." Russian Utility model RU186960U1 appears to disclose, "a medical device used in dentistry, in particular to a rotary endodontic file made with a brush for use with a standard tip for a drill. The technical result of the claimed invention is to improve the quality of treatment and reduce injuries due to the implementation of each hemispherical cable core performing the same length of the cable strands at the end and performing the cable strand ends perpendicular to the axis of the cable, which reduces the I ledges and grooves on the side surfaces of the tooth root, also reduces the risks of injury work at low engine speeds, while significantly simplifying the apparatus. The endodontic file for