Broach Patents (Class 433/102)
  • Patent number: 11033358
    Abstract: The invention relates to a blank for an endodontic instrument, obtainable by machining at least one rod by means of wire erosion, preferably selected from the group consisting of electrical discharge machining, wire electrical discharge machining, electrical discharge grinding and electro-chemical machining, wherein an erosion pattern is applied to the at least one rod, wherein the blank has a homogenous hardness.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: June 15, 2021
    Assignee: COLTÈNE/WHALEDENT AG
    Inventor: Werner Mannschedel
  • Patent number: 10981210
    Abstract: A ribbed tapered swage pin includes a head structure at a distal end which has a decreasing taper in the direction of the distal end and one or more ribs or lands positioned around the outer perimeter which, when helically driven, gradually plastically deform the swage boss of one part to form a swage joint with the hole of another part. A swaging tool with which such a swage pin may be used would, therefore, include a rotary actuator and a screw feed for driving the swage pin with a helical rotation and thrust to move through and thereby cold work the swage boss to form the swage joint.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: April 20, 2021
    Assignee: Western Digital Technologies, Inc.
    Inventor: Kenneth Allen
  • Patent number: 10966801
    Abstract: A rotatable endodontic file for cleaning/shaping a tooth root canal that includes an elongated shaft having a proximal end portion, a distal end and a tapered working portion having a rotational axis, the working portion extending from the proximal portion to the distal end; the external surface of the shaft working portion having a plurality of parallelogram-shaped cross sections along the working portion.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: April 6, 2021
    Assignee: DENTSPLY SIRONA INC.
    Inventors: Vincent Shotton, Dan Ammon
  • Patent number: 10932884
    Abstract: An endodontic instrument comprising a tapered rod, the rod comprising an active portion, the active portion terminating at a distal tip end of the rod and defining a conical envelope, the conical envelope having a longitudinal axis that coincides with an axis of rotation of the instrument.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: March 2, 2021
    Assignee: DENTSPLY SIRONA INC.
    Inventors: Gilbert Rota, Paul-Henri Vallotton
  • Patent number: 10905525
    Abstract: A medical tool and a method for using the medical tool removes tooth fragments, in particular tooth roots and/or remainders of tooth roots, from a tooth socket or an alveole in the region of the jaw. The medical tool includes a base and a needle disposed on the base. The needle has a retentive section and a drilling section.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: February 2, 2021
    Inventor: Rainer Ganss
  • Patent number: 10813717
    Abstract: In a dental treatment apparatus, a control circuit controls a drive motor in accordance with a drive sequence. The drive sequence includes a plurality of drive patterns and at least one of the plurality of drive patterns is different from other drive pattern. The plurality of drive patterns include at least one drive pattern having such drive that a cutting tool is rotated in a cutting direction for cutting a treatment portion and drive for rotating the cutting tool in a non-cutting direction which is reverse to the cutting direction.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: October 27, 2020
    Assignee: J. MORITA MFG. CORP.
    Inventors: Kyohei Kato, Tomoaki Ueda, Seiichiro Yamashita, Kazunari Matoba
  • Patent number: 10729514
    Abstract: A self-heating electric plugger/syringe needle (10/70) with the conductive element (50) on the external surface of the needle (10/70) is described. The needle (10/70), which can be divided into shank (30) and tip (20) portions, is hollow and is made of an electrically resistive material. A conductive element (50) located on the external surface of the needle runs along the length of its shank (30) and the length of its tip (20). An insulating material (60) located between the conductive element (50) and the external surface of the needle runs along the length of the shank (30). The conductive element (50) contacts the tip (20) of the needle, causing the needle to self-heat when electric current is supplied. A method for filling a root canal using the self-heating electric plugger/syringe needle (10/70) is also described.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: August 4, 2020
    Assignee: Dental Education Laboratories, Inc.
    Inventor: L. Stephen Buchanan
  • Patent number: 10722334
    Abstract: A device for measuring the length of a root canal of a subject is provided. The device includes a flexible sheath slidable over a dental handpiece head. The sheath includes electrically conducting wires for connecting to an apex locator. Also provided is a device for measuring root canal length that includes an endodontic file having a metallic element at the file end far from the end inserted into a root canal. The modified file provides a region in the metallic element for electronic attachment to an apex locator such that the rubber stopper may be moved along the entire file surface without interference.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: July 28, 2020
    Inventor: Tom C. Pagonis
  • Patent number: 10595961
    Abstract: Endodontic instruments are used to clean and enlarge the endodontic cavity space (ECS), also known as the root canal system, of a human tooth. This document describes novel endodontic instruments that are radially compressible, and methods for their use. Some embodiments include a shank and a body with a working surface. At least a portion of the working surface may define a center of mass path that spirals. The center of mass of a transverse cross-section of the working surface at the shank end can be offset from the axis of rotation of the instrument.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: March 24, 2020
    Inventor: Michael J. Scianamblo
  • Patent number: 10568715
    Abstract: Endodontic instruments are described which have at least a section with a center of mass offset from an axis of rotation so that when the instrument is rotated, the section bends away from the axis of rotation.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: February 25, 2020
    Inventor: Michael J. Scianamblo
  • Patent number: 10543060
    Abstract: Apparatus and methods for a fluted endodontic file are provided. The apparatus may include a fluted endodontic file defining a central longitudinal axis. The fluted endodontic file may include a working length extending along the central longitudinal axis. The working length may include a single flute. The working length may define an off-center cross-section having three vertices.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: January 28, 2020
    Assignee: Ormco Corporation
    Inventors: Carlos A. Aloise, L. Stephen Buchanan, Sorin Vasile Cora, Emanuele Maretto, Gopikrishnan Soundararajan
  • Patent number: 10470844
    Abstract: A dental or dental surgical ultrasonic tool, comprising: a tool body, a connecting device for connection to an ultrasonic source, a working section extending along a longitudinal axis and designed to penetrate into bone to be treated, and a liquid line extending through the tool body in the direction of the working section and ending in at least one opening for the discharge of a liquid, wherein the working section has a distal end face with multiple cutting edges and a lateral surface connected thereto, wherein at least one channel for conveying a liquid is provided in the lateral surface, and wherein the at least one opening of the liquid line is disposed on the lateral surface in the at least one channel or directly adjacent to the at least one channel. Additionally or alternatively, the at least one channel extends helically around the longitudinal axis of the working section.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: November 12, 2019
    Assignee: W&H Dentalwerk Bürmoos GmbH
    Inventors: Bernd Angermeier, Wilhelm Brugger
  • Patent number: 10441383
    Abstract: An endo file for dental endodontic treatment includes: a head portion inserted into and detachably coupled to a hand piece; a tissue removing portion inserted, from the lower side of the head piece, into a patient's root canal for removing the nerve of a tooth; and a stress dispersion portion provided between the head portion and the tissue removing portion and having at least one horizontal penetration hole so as to buffer stress concentration generated during the rotation of the endo file, and to minimize endo file breakage.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: October 15, 2019
    Inventors: Hyeong Woo Kim, Gyun Hwan Kim, Sun Young Kim
  • Patent number: 10351934
    Abstract: A method for manufacturing a nonlinear superelastic file comprising the steps of: providing a superelastic file having a shaft and a file axis; providing a fixture including a file groove being defined by one or more displacement members, the file groove configured for receiving the shaft; inserting at least a portion of the shaft into the fixture along the file groove, the portion of the shaft including a first portion of the shaft; contacting the first portion of the shaft with a first displacement member of the one or more displacement members such that the first portion of the shaft is displaced from the file axis thereby forming a first offset portion of the shaft; heating the portion of the shaft while inserted in the fixture to a temperature of at least about 300° C. for a time period of at least about 1 minute to shape-set the portion of the shaft thereby forming a shape-set nonlinear file.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: July 16, 2019
    Assignee: DENTSPLY SIRONA Inc.
    Inventors: Dan Ammon, Vincent Shotton, Yong Gao, Randall Maxwell
  • Patent number: 10251736
    Abstract: A root canal treatment apparatus includes a root canal treatment hand piece having a visible light camera which captures a visible light image of a tooth as a target of interest, and circuitry which detects a position of the root canal treating hand piece, and instructs display of three images corresponding to at least a tip position of a cutting tool attached to the root canal treating hand piece, an X-ray cross-sectional image of the tooth captured by X-ray CT image capturing beforehand, and the visible light image captured by the visible light camera such that the three images are displayed on a display in an overlapping manner in positional correspondence with one another, based on information on the position of the root canal treating hand piece detected by the circuitry.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: April 9, 2019
    Assignee: J. MORITA MFG. CORP.
    Inventor: Teruji Nakai
  • Patent number: 10196713
    Abstract: Medical instruments, particularly, endodontic instruments with unique limited memory characteristics, and methods for making such instruments. One embodiment includes heat treating an endodontic blank prior to forming a working portion of the endodontic instrument.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: February 5, 2019
    Assignee: DENTSPLY SIRONA Inc.
    Inventors: Derek E. Heath, Steven J. A. Treadway
  • Patent number: 10182883
    Abstract: An endodontic instrument for cleaning/shaping a tooth root canal that includes an elongated shaft composed of a porous material, the shaft having a proximal end portion, a distal end and a tapered working portion having an external surface and a rotational axis, the working portion extending from the proximal end portion to the distal end.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: January 22, 2019
    Assignee: DENTSPLY SIRONA INC.
    Inventors: Vincent Shotton, Christopher Damien, Dan Ammon
  • Patent number: 10149737
    Abstract: A NiTi alloy root canal file with a flexibility gradient, having a tip, middle portion and rear portion divided along the longitudinal direction. The internal microstructure of the tip is martensite, of the rear portion is austenite, and of the middle portion is a combination of martensite and austenite. The microstructure of martensite is continuously reduced and the microstructure of austenite is continuously increased as the distance from the tip increases. A manufacturing method for the NiTi alloy root canal file with a flexibility gradient. As the internal microstructure of the NiTi alloy root canal file with a flexibility gradient gradually changes along the axial direction and the strength also gradually changes, the flexibility and strength show a gradient change along the axial direction of the root canal file, providing excellent cutting property, high anti-fatigue life and significantly improving operation performance, safety, and life of the root canal files.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: December 11, 2018
    Assignee: SHENZHEN SUPERLINE TECHNOLOGY CO., LTD.
    Inventor: Zhong Wang
  • Patent number: 10136962
    Abstract: An improved rotary endodontic file includes a multi-planar pre-curved apical portion having a first and a second curvature. The pre-curved apical portion begins at about one-third to one-quarter of the working length as measured from the tip end of the endodontic instrument. The first and second curvature permit the file to continually search and engage the walls of a tooth root canal in a forced inside-forced outside manner. As the file works its way down, it breaks free of any ledges encountered, probes lateral- and delta-type openings, and does not allow the file to stray from the curvature of the canal.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: November 27, 2018
    Assignee: Dentsply Sirona, Inc.
    Inventor: William B. Johnson
  • Patent number: 10130444
    Abstract: An endodontic instrument includes a plurality of flutes and a plurality of lands extending helically around a working portion. Each flute includes a curved concave flute surface, a pair of flute shoulders at the peripheral edges of the flute surface, a flute width defined by a distance between the flute shoulders, and a flute depth defined by a point of maximum depth between the flute shoulders. Each land is positioned between a pair of axially adjacent flutes and includes a curved concave land surface, a pair of land shoulders at the peripheral edges of the land surface, a land width defined by a distance between the land shoulders, and a land depth defined by a point of maximum depth between the land shoulders. The land width is less than the flute width and the land depth is less than the flute depth in the upper region of the working portion.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: November 20, 2018
    Assignee: DENTSPLY SIRONA Inc.
    Inventor: Derek Heath
  • Patent number: 10123850
    Abstract: An endodontic instrument comprising a tapered rod, the rod comprising an active portion, the active portion terminating at a distal tip end of the rod and defining a conical envelope, the conical envelope having a longitudinal axis that coincides with an axis of rotation of the instrument.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: November 13, 2018
    Assignee: DENTSPLY SIRONA Inc.
    Inventors: Gilbert Rota, Paul-Henri Vallotton
  • Patent number: 10047428
    Abstract: Endodontic instruments for use in performing root canal therapy on a tooth are disclosed. In one form, the instruments include an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank comprises a titanium alloy, and the shank is prepared by heat-treating the shank at a temperature above 25° C. in an atmosphere consisting essentially of a gas unreactive with the shank. In another form, the endodontic instruments have an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank consists essentially of a titanium alloy selected from alpha-titanium alloys, beta-titanium alloys, and alpha-beta-titanium alloys. The instruments solve the problems encountered when cleaning and enlarging a curved root canal.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: August 14, 2018
    Assignee: Gold Standard Instruments, LLC
    Inventor: Neill Hamilton Luebke
  • Patent number: 10039622
    Abstract: A method for removing a dental post from a tooth. The method includes (a) removing securing materials from around the dental post, (b) texturing the dental post to form a prepared dental post, (c) providing a dental post removal device with a hollow tubular structure and a fulcrum, (d) filling the hollow tubular structure with dental cement, (e) placing the dental cement-filled tubular structure over the prepared dental post, inserting a fluted file through the filled tubular structure and engaging file flutes between the prepared dental post and the wall of the tubular device and allowing the material to adhere together the tubular structure, the file, and dental post, and (f) applying a force on the fulcrum to remove the hollow tubular structure, the attached file and dental post from the tooth.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: August 7, 2018
    Inventor: C. John Munce
  • Patent number: 9895205
    Abstract: A dental treating apparatus according to the present invention includes: a hand piece; a head unit; a driving unit; a control unit; a load specifying unit; and a load comparing unit. The hand piece drivably holds a cutting tool on the head unit. The driving unit drives the cutting tool in a normal rotation direction or in a reverse rotation direction. The load comparing unit compares a load detected and a reference load. During a normal rotation period until driving for rotating the cutting tool in the normal rotation direction by the driving unit satisfies a predetermined first condition, the control unit maintains a rotation direction of the cutting tool in the normal rotation direction, and when a result of comparison by the load comparing unit attains a predetermined result during the normal rotation period, the control unit controls the rotation direction to the reverse rotation direction.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: February 20, 2018
    Assignee: J. Morita Manufacturing Corporation
    Inventors: Naoki Katsuda, Seiichiro Yamashita, Tomoaki Ueda, Hideo Hijikata
  • Patent number: 9878366
    Abstract: A fatigue-resistant Nitinol instrument has a working portion in the deformed monoclinic martensitic state and an austenite finish temperature in the range of 40° to 60° C. Because the operating environment of the instrument is about 37° C., the working portion remains in the monoclinic martensitic state during its use. The relatively high austenite finish temperature and fatigue resistance is achieved by subjecting the nickel-titanium alloy to a final thermal heat treat in a temperature range of about 410° to 440° C. while the nickel-titanium alloy is under constant strain of about 3 to 15 kg. Further, the high austenite finish temperature is achieved without subjecting the alloy to thermal cycling to produce shape memory. Additionally, there are no intermediate processing steps occurring between obtaining a finished diameter of the wire or blank through cold working and the final thermal heat treat under constant strain.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: January 30, 2018
    Assignee: Dentsply Sirona Inc
    Inventor: William B. Johnson
  • Patent number: 9872740
    Abstract: The present invention provides a system for the endodontic treatment of a root canal that includes (i) an endodontic instrument; (ii) an endodontic handpiece having a drive motor for rotating the endodontic instrument releasably attached to the handpiece; (iii) a control unit for controlling the rotation of the endodontic instrument according to one or more predetermined rotational sequences.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: January 23, 2018
    Assignee: Dentsply Sirona Inc.
    Inventor: Markus Borgschulte
  • Patent number: 9844418
    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.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: December 19, 2017
    Assignee: FORUM ENGINEERING TECHNOLOGIES (96) LTD.
    Inventors: Carlos Alberto Spironelli Ramos, Michael Yakoby
  • Patent number: 9839492
    Abstract: A new ultrasonic tip is used to activate endodontic files and includes a tubular body; a ring disposed at one end of the tubular body, the ring having an external diameter and an internal diameter; and the ring having a cut to permit easy insertion of the endodontic file; and a threaded hole at the other end of the tubular body, the threaded hole being capable of screwing onto an ultrasonic hand piece.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: December 12, 2017
    Inventors: Heriberto Bujanda Wong, Heriberto Bujanda Preciado
  • Patent number: 9801696
    Abstract: An instrument for drilling dental root canals includes a tapered rod having over at least a part of its length—the active part—a polygonal cross-section forming at least two cutting edges, the active part terminating by a point and being defined by an envelope of cylindrical or conical shape, whose longitudinal axis coincides with the instrument's axis of rotation. The active part has a first portion extending from the point and a second portion extending following the first portion towards the rear of the active part. At least one cross-section of the first portion has a center of mass located on the axis of rotation and the cutting edges are located on the envelope. Any cross-section of the second portion has a center of mass offset with respect to the axis of rotation and at least one cutting edge defined by the cross-section is located set back.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: October 31, 2017
    Assignee: MAILLEFER INSTRUMENTS HOLDING SÁRL
    Inventors: Gilbert Rota, Paul-Henri Vallotton
  • Patent number: 9795459
    Abstract: Medical instruments, particularly, endodontic instruments with unique limited memory characteristics, and methods for making such instruments. One embodiment includes heat treating a finished endodontic instrument. A related embodiment includes electropolishing a finished endodontic instrument and then heat treating the endodontic instrument.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: October 24, 2017
    Assignee: D & S Dental, LLC
    Inventors: Derek E. Heath, Steven J. A. Treadway, Bobby J. Bennett
  • Patent number: 9788916
    Abstract: A guided drill for osteotomy for a dental implant is provided. The guided drill includes a guide body configured to fit within a guide sleeve attached to a surgical template. A surgical kit includes a series of guided drills with each guided drill having a different combination of a drilling diameter and a drilling length, a container containing the series of guided drills in a form of an array, and a chart comprising a map of the array and graphical indications. The graphical indications are configured to indicate to a user of the surgical kit a suggested order of sequentially using the series of guided drills from the array to perform a part of osteotomy procedure and obtain a hole, having a prescribed diameter and a prescribed length, for a dental implant.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: October 17, 2017
    Assignee: MIS Implants Technologies Ltd.
    Inventors: Asaf Neeman, Thaer Sliman
  • Patent number: 9681928
    Abstract: A set of at least three endodontic files, the first file of the set being entirely non-landed and tapered and having a diameter at its tip end which is smaller in diameter than that of a second and a third file of the set at their respective tip end, and the second and third files each having the following characteristics: a machined length, preferably 16 mm, having cutting surfaces thereon and starting at a tip end and extending less than the overall length of the file (preferably 25 mm); an active length starting at the tip end and extending to at least half of the machined length, the active length being tapered; a non-active length extending a remainder of the machined length, the non-active length being non-tapered; and the active length being landed in the first one-third and non-landed in the remaining two-thirds of its length.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: June 20, 2017
    Inventor: Charles Maupin
  • Patent number: 9681929
    Abstract: A dental treating apparatus according to the present invention includes: a hand piece; a head unit; a driving unit; a resistor for load detection; a load comparing unit; and a control unit. The hand piece drivably holds a cutting tool on the head unit. The driving unit drives the cutting tool in a normal rotation direction or in a reverse rotation direction. The resistor for load detection detects a load applied to the cutting tool. The load comparing unit compares the detected load and a reference load each time driving for rotating the cutting tool in the reverse rotation direction by a predetermined rotation angle is performed. The control unit controls the driving unit based on a result of comparison by the load comparing unit.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: June 20, 2017
    Assignee: J. Morita Manufacturing Corporation
    Inventors: Naoki Katsuda, Seiichiro Yamashita, Tomoaki Ueda, Hideo Hijikata
  • Patent number: 9662181
    Abstract: Endodontic instruments are described which have at least a section with a center of mass offset from an axis of rotation so that when the instrument is rotated, the section bends away from the axis of rotation.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: May 30, 2017
    Inventor: Michael J. Scianamblo
  • Patent number: 9585731
    Abstract: 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.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: March 7, 2017
    Assignee: Medic NRG Ltd.
    Inventors: Arik Becker, Shlomo Berkovich, Haim Levy
  • Patent number: 9463076
    Abstract: The present invention is directed to a dental treating apparatus including: a hand piece; a power source (micro motor); a driving unit (motor driver); a driving state detecting unit (resistor for load detection, root canal length measuring circuit); and a controller. The hand piece drivably holds a cutting tool on a head unit. The power source drives the cutting tool. The driving unit drives the cutting tool with twist driving in which the normal rotation and the reverse rotation are repeated. The driving state detecting unit detects a driving state of the cutting tool. The controller changes at least one parameter of a rotation angle in the normal rotation, a rotation angle speed in the normal rotation, a rotation angle in the reverse rotation, and a rotation angle speed in the reverse rotation in accordance with the driving state of the cutting tool detected by the driving state detecting unit.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: October 11, 2016
    Assignee: J. Morita Manufacturing Corporation
    Inventors: Seiichiro Yamashita, Kyoshi Tokunaga, Naoki Katsuda
  • Patent number: 9456879
    Abstract: An endodontic instrument for drilling root canals, in particular a flexible drilling instrument which includes a working part and a securing end fitting intended for mounting the instrument in a mandrel of a contra-angle-type support provided with an electric motor used to drive an instrument clockwise. The casing of the working part is conical along its length and ends in a tip. The working part is provided with a spiral flute forming a ridge having a cutting edge. The drill bit, relief and cutting angles defined by the cutting edge can be varied along the length of the working part so that the instrument is particularly sharp in the area near the tip and so that the profile of the cutting ridge becomes progressively more blunt along the length of the instrument.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: October 4, 2016
    Assignee: FKG Dentaire S.A.
    Inventor: Olivier Breguet
  • Patent number: 9454846
    Abstract: A method for measuring regions of a tooth in a mouth including: measuring at least one surface point on a surface of the tooth with respect to an element mechanically coupled to said surface point; determining a location of at least one visible reference mechanically coupled to said surface point with respect to said element; estimating a location of said surface point with respect to said visible reference. A device used for such measuring may include a main body comprising a final optical element of an imager which defines an optical field of view directed in a first direction; and a measurement element coupled to said main body extending generally in said first direction; where a tip of said measurement element is sized and shaped to be inserted between a tooth and adjacent gingiva; where said optical field of view is sized to image at least part of a tooth.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: September 27, 2016
    Assignee: Dentlytec G.P.L. LTD.
    Inventors: Benny Pesach, Ygael Grad, Blanc Zach Lehr, Georgy Melamed
  • Patent number: 9408674
    Abstract: A reamer for use in root canal preparation includes a blade that is spiral-shaped with a pitch increasing towards the tip, and with a cutting or non-cutting tip. At given points along the length of the spiral of the blade, there is a plurality of gaps, the spiral starting again beyond the gaps, wherein the portion where the spiral is interrupted has either a constant or decreasing cross section linking the two diameters before and after the gap.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: August 9, 2016
    Assignee: SWEDEN & MARTINA SPA
    Inventor: Vito Antonio Malagnino
  • Patent number: 9333050
    Abstract: A gutta-percha remover suitable for removing a gutta-percha and having flexibility with good compliancy to curvature of a root canal and a superior removing capability for forming a sufficient gap bet the gutta-percha and the root canal wall is provided. The gutta-percha remover includes a shaft, a tapered working portion connected to the shaft, and one, two, or more screw-shaped grooves formed in the working portion. The cross-sections of a base end and a tip of the working portion are such that the tip of the working portion is greater in rate of the area of each cross-section to a corresponding circle circumscribing the cross-section.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: May 10, 2016
    Assignee: Mani, Inc.
    Inventors: Yukihisa Iwamoto, Norio Kaneko
  • Patent number: 9226802
    Abstract: An instrument for cleaning canals during endodontic procedures is presented. The instrument is formed in one piece from a stiff polymeric material. The instrument features a handle, a measuring shaft, and a tapering shank with raised polymeric projections along its length. The present invention is designed without the use of bristles that conventional brushes contain. The raised polymeric projections include fins that may be oriented parallel to or transverse to the axis of the instrument to provide multidirectional cleaning capability. The instrument is stiff enough to penetrate a canal and mechanically scrub and scrape canal surfaces, but flexible enough to negotiate the curves of the canal.
    Type: Grant
    Filed: January 2, 2012
    Date of Patent: January 5, 2016
    Inventors: Ryan J. McCafferty, Michael Quigley
  • Patent number: 9113980
    Abstract: An instrument for drilling dental root canals, includes a tapered rod having on at least an active part of its length, at least one helical flute defining at least one helical cutting edge. The instrument also has a helical hollow on a portion of the active part extending as far as the point of the rod. At least one of the edges defined by the helical hollow is coincident with the cutting edge, the hollow reducing the cutting angle of the cutting edge. Any cross-section of the active part has at least one convex side belonging to the helical flute. The closer the cross-section in question is to the point of the rod, the more the curvature at any point of the convex side increases and tends to approximate the curvature of the circumscribed circle of the cross-section and passing via the cutting edge defined by the helical flute.
    Type: Grant
    Filed: February 12, 2011
    Date of Patent: August 25, 2015
    Assignee: MAILLEFER INSTRUMENTS HOLDING SARL
    Inventors: Gilbert Rota, Paul-Henri Vallotton
  • Publication number: 20150086941
    Abstract: A dental treating apparatus according to the present invention includes: a hand piece; a head unit; a driving unit; a resistor for load detection; a load comparing unit; and a control unit. The hand piece drivably holds a cutting tool on the head unit. The driving unit drives the cutting tool in a normal rotation direction or in a reverse rotation direction. The resistor for load detection detects a load applied to the cutting tool. The load comparing unit compares the detected load and a reference load each time driving for rotating the cutting tool in the reverse rotation direction by a predetermined rotation angle is performed. The control unit controls the driving unit based on a result of comparison by the load comparing unit.
    Type: Application
    Filed: September 12, 2014
    Publication date: March 26, 2015
    Inventors: Naoki Katsuda, Seiichiro Yamashita, Tomoaki Ueda, Hideo Hijikata
  • Publication number: 20150072307
    Abstract: Endodontic instruments are described which have at least a section with a center of mass offset from an axis of rotation so that when the instrument is rotated, the section bends away from the axis of rotation.
    Type: Application
    Filed: August 8, 2014
    Publication date: March 12, 2015
    Inventor: Michael J. Scianamblo
  • Publication number: 20150056571
    Abstract: An endodontic instrument adapted to be axially reciprocated within a root canal to remove material from walls of the root canal. The endodontic instrument includes an elongate shaft and a working portion. The elongate shaft includes a proximal end adjacent a handle and a distal end terminating at a tip spaced from the proximal end by the length of the instrument. The working portion includes a first helical fluted cutting surface for removing material from the walls of a root canal and a second helical fluted cutting surface for removing material from the walls of a root canal. The first helical fluted cutting surface and second helical fluted cutting surfaces are formed in opposing left-hand and right-hand directions such that material is removed form the walls of a root canal when the instrument is rotated in either a first or a second direction.
    Type: Application
    Filed: August 20, 2013
    Publication date: February 26, 2015
    Inventors: Derek Heath, Steve Treadway
  • Publication number: 20150024342
    Abstract: An improved endodontic instrument has a uniform tapered working length with at least two helical shaped flutes and spiraled lands having a land width no greater than 0.101 mm as measured in a plane perpendicular the central axis of rotation of instrument. The land width is preferably constant along the working length but may vary provided it does not exceed 0.101 mm. The instrument resists mid-root transportation and exhibits superior fatigue performance and cutting efficiency compared to prior art instruments.
    Type: Application
    Filed: July 18, 2013
    Publication date: January 22, 2015
    Inventor: ANDRIS JAUNBERZINS
  • Patent number: 8932056
    Abstract: Endodontic instruments are described which have at least a section with a center of mass offset from an axis of rotation so that when the instrument is rotated, the section bends away from the axis of rotation.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: January 13, 2015
    Inventor: Michael Scianamblo
  • Publication number: 20140356809
    Abstract: The invention relates to a reamer with an improved blade for use in root canal preparation, the blade being spiral-shaped with a pitch increasing towards the tip, and with a cutting or non-cutting tip. At given points along the length of the spiral of the blade, there is a plurality of gaps, the spiral starting again beyond the gaps, wherein the portion where the spiral is interrupted has either a constant or decreasing cross section linking the two diameters before and after the gap.
    Type: Application
    Filed: January 30, 2012
    Publication date: December 4, 2014
    Applicant: SWEDEN & MARTINA Spa
    Inventor: Vito Antonio Malagnino
  • Publication number: 20140342301
    Abstract: According to a dental image display device, a dental surgical operation device, and a dental image display method, a 2D captured image of a tooth as a surgical operation target that is captured with visible light in an articulation face direction, and an articulation face direction converted 2D image obtained as a result of displaying 3D information, which is acquired on the tooth and includes information on a root canal inside the tooth, two-dimensionally on a predetermined plane in the articulation face direction, are displayed in correspondence with each other on a monitor.
    Type: Application
    Filed: March 6, 2014
    Publication date: November 20, 2014
    Applicant: J. MORITA MANUFACTURING CORPORATION
    Inventors: Jürgen Richard Fleer, Teruji Nakai, Masakazu Suzuki, Tomoyuki Sadakane
  • Patent number: 8882504
    Abstract: Endodontic instruments are described which have at least a section with a center of mass offset from an axis of rotation so that when the instrument is rotated, the section bends away from the axis of rotation.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: November 11, 2014
    Inventor: Michael J. Scianamblo