Ultrasonic Patents (Class 433/119)
  • Patent number: 5927977
    Abstract: A dental scaling system includes a scaling instrument with a handpiece and a scaling tip at the end of the handpiece. An ultrasonic transducer is connected to the scaling tip, and there is an irrigant outlet in the scaling tip. A cable is attachable to the handpiece and includes an irrigant passage and two lead wires for supplying irrigant and electrical energy to the handpiece. An irrigant supply bottle is releasably attachable on a housing, and the cable is attachable on the housing. The housing includes an air pump to pressurize and transfer irrigant liquid from the irrigant supply bottle through the cable to the handpiece. The housing also includes electronics to power and control the ultrasonic transducer. Each irrigant supply bottle includes a mounting member with a pair of wings, received in a forked docking assembly on the housing, with the mounting member lockable in the docking assembly.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: July 27, 1999
    Assignee: Professional Dental Technologies, Inc.
    Inventors: David William Sale, Ronald W. Haynes, Elbert L. Young, Jr.
  • Patent number: 5899693
    Abstract: There is provided a substantially disposable dental tip incorporated in an ultrasonic scaler and a dental working distal end piece used for the dental tip.The dental tip in accordance with the present invention includes a transmission medium whose proximal end portion is connected to an ultrasonic vibration source to transmit ultrasonic vibrations generated from the ultrasonic vibration source and the dental working distal end piece of the present invention which is mounted on a distal tip end of the transmission medium and consists of a tip end member having a shape suitable for dental treatment etc. and a connecting portion connected integrally to a proximal end portion of the tip end member.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: May 4, 1999
    Assignees: Hakusui Trading Co., Ltd, Satelec SA, Kazuko Himeno
    Inventors: Kazuko Himeno, Hiroshi Himeno
  • Patent number: 5873844
    Abstract: A method and apparatus for numbing tissue before a shot is inserted into the tissue wherein said method and apparatus provide a vibratory force the tissue, thereby overexciting the nerves in the tissue and blocking the nerves' ability to sense pain.
    Type: Grant
    Filed: January 22, 1997
    Date of Patent: February 23, 1999
    Inventors: Manuel Campero, Jerry Roane
  • Patent number: 5868570
    Abstract: An ultrasonic dental tool for use with an ultrasonic transducer, comprises a substantially elongate tool defined by a shaft having a proximal end with a connector for attachment to an ultrasonic transducer, a distal end having a tip configured for performing a dental procedure, a portion of straight cylindrical wall from the tip inward toward the proximal end, and a contra-angle portion of substantially uniform diameter on the proximal end, and a uniform gradual tapered portion intermediate the distal end and the proximal end.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: February 9, 1999
    Assignee: San Diego Swiss Machining, Inc.
    Inventors: Teresa R. Hickok, Claude E. Martin, Clifford J. Ruddle
  • Patent number: 5853290
    Abstract: An ultrasonic tooth cleaner having an elongated tip having multiple bends or a curved shape. This allows the operator to reach any surface or crevice in the oral cavity. The tips are formed of plastic materials that can withstand constant ultrasonic vibration in a range that is therapeutically beneficial.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: December 29, 1998
    Inventor: Ronald H. Winston
  • Patent number: 5836765
    Abstract: An ultrasonic dental tool for use with an ultrasonic transducer, comprises a substantially elongate tool defined by a shaft having a proximal end with a connector for attachment to an ultrasonic transducer, a distal end having a tip configured for performing a dental procedure, and a uniform gradual tapered portion intermediate the distal end and the proximal end is composed of a medical grade titanium alloy.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: November 17, 1998
    Inventor: Teresa R. Hickok
  • Patent number: 5827064
    Abstract: Improved methods and apparatus for the removal of plaque from interproximal areas of the dental anatomy and from periodontal pockets. An reciprocal or orbital vibratory motion about the longitudinal axis of the bristles is utilized to impart frictional forces from a multitude of bristles positioned within the interproximal area of two adjacent teeth and in the periodontal pockets of the gum. An advanced embodiment utilizes ultrasonically enhanced bristle tufts to transmit ultrasonic vibrations into the gingival fluids in the periodontal pockets, producing standing ultrasonic waves within the gingival fluids which augments and enhances the plaque removal capability of the reciprocally or orbitally vibrating nylon bristles.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: October 27, 1998
    Assignee: Sonex International Corp.
    Inventor: Robert T. Bock
  • Patent number: 5816808
    Abstract: The invention relates to an instrument for periodontal treatment, consisting of a connection piece (4) and of a blade (1), wherein said blade (1) has an abrasive part exhibiting two sectors (10, 11) distributed along the blade, and each situated on opposite sides of a plane passing through the axis of the blade, these two sectors (10, 11) exhibiting different levels of abrasiveness such that when the instrument is introduced into the periodontal pocket during treatment, the more abrasive sector comes into contact with the root surface of the tooth, and the other, less abrasive, sector comes into contact with the mucosa, said instrument being adapted to be held by way of its connection piece (4) on a handpiece which confers a vibratory movement on it, allowing the two sectors (10, 11) to effect the detachment of the undesirable tartar.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: October 6, 1998
    Assignee: Micro Mega International Manufactures S.A.
    Inventors: Gianluca Gambarini, Paolo Trisi, Antonio Scarano, Jean-Marie Badoz
  • Patent number: 5772434
    Abstract: An ultrasonic tooth cleaner having an elongated tip having multiple bends or a curved shape. This allows the operator to reach any surface in the oral cavity. The tips are formed of plastic materials that can withstand constant ultrasonic vibration in a range that is therapeutically beneficial.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: June 30, 1998
    Inventor: Ronald H. Winston
  • Patent number: 5749727
    Abstract: A transducer activated subgingival tool for contacting subgingival tooth surfaces and directing a fluid adjacent to said surfaces, wherein the tool has an activated tip having a fluid inlet end, a subgingival outlet end, a step in the surface of the outer wall of said tip between said inlet end and said subgingival outlet end, and a fluid passageway wall internal to the tip. The passageway wall is formed in the inlet end generally along the longitudinal center axis of the inlet end of the tip. In a preferred embodiment of the invention, the step intersects the passageway wall at the orifice edge.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: May 12, 1998
    Assignee: Dentsply Research & Development Corp.
    Inventors: Huy-Can Dao, George H. Warrin, Harvey B. Foulkes, Rene Perdreaux, Edward W. Lee
  • Patent number: 5738575
    Abstract: Improved methods and apparatus for the removal of plaque from interproximal areas of the dental anatomy and from periodontal pockets. An orbital vibratory motion about the longitudinal axis of the bristles is utilized to impart frictional forces from a multitude of bristles positioned within the interproximal area of two adjacent teeth and in the periodontal pockets of the gum. An advanced embodiment utilizes ultrasonically enhanced bristle tufts to transmit ultrasonic vibrations into the gingival fluids in the periodontal pockets, producing standing ultrasonic waves within the gingival fluids which augments and enhances the plaque removal capability of the orbitally vibrating nylon bristles.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: April 14, 1998
    Inventor: Robert T. Bock
  • Patent number: 5733119
    Abstract: Microsurgical drill bits for selective connection to an ultrasonic transducer head for use in dental retro-filling preparations each have a hub at one end for coupling to the transducer head, a cutting tip at the opposite end, and a shaft extending from the hub to the tip. The shaft has one or more steps in diameter at a predetermined position in its length designed for optimum vibration of the cutting tip without increasing the breakage rate above acceptable limits. The drilling tips have shafts which are angled relative to the hub and at least some have bent end portions so that the cutting tip is at an angle to the remainder of the shaft, allowing the transducer head to be held at a comfortable angle.
    Type: Grant
    Filed: April 17, 1995
    Date of Patent: March 31, 1998
    Inventor: Gary B. Carr
  • Patent number: 5730594
    Abstract: An ultrasonic dental scaler for use with a dental scaler insert having a resonant frequency associated therewith includes a handpiece adapted for removably receiving the dental scaler insert, an energizing coil mounted on the handpiece, whereby the energizing coil substantially surrounds the dental scaler insert. The ultrasonic dental scaler includes a selectively tunable oscillator circuit coupled to the energizing coil and which generates a control signal having an oscillation frequency associated therewith for vibrating the dental scaler insert in response thereto. Specifically, the selectively tunable oscillator circuit includes an automatic tuner for automatically altering the oscillation frequency associated with the control signal to be substantially equivalent to the resonant frequency associated with the dental scaler insert in response to the control signal being fed back thereto.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: March 24, 1998
    Assignee: Parkell Products, Inc.
    Inventor: Michael C. Sharp
  • Patent number: 5725370
    Abstract: A dental tip comprises a proximal end portion connected to a drive source and a distal end portion adapted to act on a region to be subjected to dental treatment. The distal and proximal end portions are formed of a composite-material molded product which includes a plastic base material and an inorganic filler or/and an organic filler compounded therewith. This tip can produce the same treatment effect as a conventional one without damaging teeth or prostheses in dental treatment, and can be manufactured with ease. Thus, the tip is low-priced and disposable.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: March 10, 1998
    Assignees: Kazuko Himeno, Takarazuki Plastic Industry Co., Ltd.
    Inventors: Hiroshi Himeno, Kazuko Himeno, Kenichi Kita, Tadashi Imanishi
  • Patent number: 5704787
    Abstract: An ultrasonic dental tip that is hardened by a novel process that includes roughing the tip and then applying a metal nitride coating, such as titanium nitride (Ti--N) or zirconium nitride (Zr--N). The roughing is preferably accomplished by sandblasting the tip with a microblaster. Optionally the tip may be heat treated after it has been roughened and prior to being coated in order to further increase its hardness.
    Type: Grant
    Filed: October 20, 1995
    Date of Patent: January 6, 1998
    Assignee: San Diego Swiss Machining, Inc.
    Inventors: Teresa R. Hickok, Claude E. Martin
  • Patent number: 5655906
    Abstract: The drive assembly for a dental sonic scaler is disconnected from a scaling tip assembly and is then withdrawn from a surrounding tubular handle/sheath. This allows the sheath to be sterilized, after use, while the drive assembly, not needing sterilization, can be easily connected to another sheath, by way of a quick-disconnect joining the components. A tubular seal between the tip assembly and the sheath prevent the drive assembly from being contaminated during use of the scaler.
    Type: Grant
    Filed: June 12, 1995
    Date of Patent: August 12, 1997
    Assignee: Micro Motors, Inc.
    Inventors: Ronald G. Coss, James L. Bocox
  • Patent number: 5636988
    Abstract: An electric device which removes supragingival and subgingival plaque and undesirable debris from the interproximal surfaces between teeth is described. This device utilizes a combination of sonic energy and dental floss which is secured between two tines, the tines being part of a flexible fork which is removable from a powered handle which contains batteries and an electric motor. The electric motor, which is coupled to an eccentrically mounted disc on an output shaft, revolves at sonic frequencies which in turn generates sonic energy that is transmitted to the flexible fork which holds the floss. The sonic energy is synchronized and in tune with the natural resonance frequencies of the fork thereby stimulating the resonance action of oscillating vertical and/or elliptical movement of the fork which in turn imparts cleaning energy to and enhances the cleaning properties of the floss.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: June 10, 1997
    Inventor: Ronald K. Murayama
  • Patent number: 5577911
    Abstract: This invention relates to a periodontal instrument and curettage method for separating and removing diseased granulation tissue from a periodontal cavity. The instrument is comprised of a periodontal curette affixed to a source of ultrasonic energy that drives the curette in an elliptical motion at an ultrasonic frequency. The instrument greatly reduces the physical effort and time required for periodontal curettage.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: November 26, 1996
    Inventor: Leonard M. Garfinkel
  • Patent number: 5567153
    Abstract: A transducer activated tool for contacting workpiece surfaces and directing fluid adjacent to the surfaces is disclosed. The tool may be ultrasonically activated by attachment to an insert that includes a magnetostrictive element. The tip includes distal surfaces shaped to contact the workpiece and additionally includes a fluid passageway internal to the tip that is bored generally along the centerline of the tip but is offset from the tip axis such that a discharge orifice is formed in the tip displaced from the distal tip end. The passageway is preferably angularly offset so that the discharge orifice is formed in the distal end of the tip about 2-8 mm from the distal end of the tip. The tip when shaped to conform to dental or tooth surfaces is particularly useful as a dental tool. In another embodiment the fluid passageway is eccentrically offset from the tip axis wherein the passageway is substantially parallel to the center axis but displaced therefrom preferably by about 0.1 to 0.5 mm.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: October 22, 1996
    Assignee: Dentsply Research & Development Corp.
    Inventors: Harvey B. Foulkes, George E. Warrin, Huy-Can Dao, Rene Perdreaux
  • Patent number: 5554896
    Abstract: A portable power supply system utilizes a foot controller and a lightweight, sealed electric motor assembly which attaches to any International Standard E-Coupling handpiece. The foot controller is adaptable for use with either an AC/DC adaptor or a rechargeable battery. A coaxial cable connects the variable voltage supply from the foot controller to the low voltage, DC motor assembly. The motor assembly is sterilizable, lightweight, and quiet, making it ideal for use by dentists, oral or orthopedic surgeons, laboratory technicians, or anyone else desiring an economical, portable power supply for handpieces.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: September 10, 1996
    Assignee: Miyad
    Inventor: Donald J. Hogan
  • Patent number: 5547380
    Abstract: Method and tool for fracturing the interface between dental structure that have been cemented together. The method is accomplished by positioning a rapid impacting tool at about 90.degree. against the one side of the lower portion of a cap covering a tooth. The opposite side of the cap is abutted with a kinetic energy absorber. The flexing against the cap is small while the frequency is high.
    Type: Grant
    Filed: August 19, 1994
    Date of Patent: August 20, 1996
    Inventor: Jack Goodman
  • Patent number: 5546624
    Abstract: An improved therapeutic ultrasonic toothbrush for daily removal of soft plaque, disruption of the bacterial colonization process within the gingival pockets, the reduction of the recurrence of aphthous stomatitis, and for the acceleration of the healing of the sores of the oral cavity. The device includes a handle constructed of a rigid material, a battery pack, an electronics driving module, a piezoelectric member, and a removable brush head. The piezoelectric crystal resonates, expands and contracts volumetrically, in tune with the frequency supplied by the electronics driving module and thereby converts the electronic energy into sound-wave energy. The sound waves loosen up the bound between the bacterial plaque and the teeth and disrupt the bacterial colonization process within the periodontal pockets and the mucous membranes of the oral cavity. Ultrasonic emission from the back side of the brush accelerates healing of sores of the oral cavity.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: August 20, 1996
    Assignee: Sonex International Corporation
    Inventor: Robert T. Bock
  • Patent number: 5531597
    Abstract: A transducer activated tool for contacting workpiece surfaces and directing fluid adjacent to said surfaces is disclosed. The tool may be ultrasonically activated by attachment to an insert that includes a magnetostrictive element. The tip includes distal surfaces shaped to contact the workpiece and additionally includes a fluid passageway internal to the tip that is bored generally along the centerline of the tip but is offset from the tip axis such that a discharge orifice is formed in the tip displaced from the distal tip end. The passageway is preferably angularly offset so that the discharge orifice is formed in the distal end of the tip about 2-8 mm from the distal end of the tip. The tip when shaped to conform to dental or tooth surfaces is particularly useful as a dental tool. In another embodiment the fluid passageway is eccentrically offset from the tip axis wherein the passageway is substantially parallel to the center axis but displaced therefrom preferably by about 0.1 to 0.5 mm.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: July 2, 1996
    Assignee: Dentsply Research & Development Corp.
    Inventors: Harvey B. Foulkes, George E. Warrin, Huy-Can Dao, Rene Perdreaux
  • Patent number: 5531598
    Abstract: An apparatus for the hygienic care of the teeth and surrounding gum tissue utilizes ultrasonic energy to massage and clean the teeth and gingival areas. A semi-rigid connector is provided for a handle, and a transducer provided with a liquid-filled membrane. The spring-action created by this handle would allow the transducer to contact the teeth. The transducer is configured to cover only a relatively small portion of the user's teeth and gingival tissue, and can easily be replaced.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: July 2, 1996
    Inventors: Marvin Rosenberg, Irving Wasson
  • Patent number: 5501596
    Abstract: A dental scaler is provided which has a control unit and a handpiece assembly linked to the control unit by a conduit carrying fluid and electrical power. The handpiece assembly includes a conduit connector secured to an end of the conduit remote from the control unit and an autoclavable handpiece removably securable to the conduit connector. The connector and handpiece have slidably connectable bodies, each having mating fluid and electrical connectors. The handpiece connector body includes a check valve to prevent rearward flow of water. The conduit connector body includes a check valve and a double fluid tight seal. The use of the two check valves and two seals reduces the possibility of fluid leaking from the back of the handpiece or from the connector. The conduit connector body is received in a sleeve of the handpiece. The connector has a finger which is received in an axial slot of the handpiece sleeve.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: March 26, 1996
    Assignee: Young Dental Manufacturing Company, Inc.
    Inventor: Ronald L. Bailey
  • Patent number: 5484398
    Abstract: An ultrasonic surgical handpiece for surgery on a patient has a handpiece with distal and proximal ends on a housing thereof for manipulation by a surgeon. A vibrator is carried within a hollow inside of the housing. A tool extends from the vibrator at the distal end to a distal tip and is tubular with a bore along its axis so axial vibrations at high frequency are transmitted to the distal tip. Fluid flows from the distal tip to the vibrator, cools the vibrator and connects to a source of suction at the proximal end. A flue carried cantilever on the distal end extends about the tool so a space is between the tool and the flue for guiding fluid from the distal end to the distal tip. A port located through the tool connects between the space and the bore and is axially positioned near the distal end to collect fluid. An inlet on the flue is near the distal end for fluid provided by a supply. The inlet is axial distal of the port and/or may meter fluid to a preset range.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: January 16, 1996
    Assignee: Valleylab Inc.
    Inventor: Robert B. Stoddard
  • Patent number: 5451161
    Abstract: A method and apparatus for vibrating a dental scaler insert at its resonant frequency which includes an energizing coil and an automatically tuned oscillating circuit is disclosed. The oscillating circuit is automatically tuned to vibrate a scaler insert at its resonant frequency in response to an impedance of the energizing coil. The energizing coil impedance is responsive to a scaler insert positioned within the energizing coil. Additionally, the dental scaler device can be operated with scaling inserts having different mechanical resonant frequencies associated therewith. Accordingly, dental scaler inserts resonant at about 25kHz or 30kHz may be inserted and operated by the dental scaler device of the present invention. The apparatus for vibrating a dental scaler may also include a feature permitting the operator to temporarily increase an amplitude of vibration of the scaler insert to enable the operator to dislodge stubborn calculus from a patient's teeth.
    Type: Grant
    Filed: August 24, 1993
    Date of Patent: September 19, 1995
    Assignee: Parkell Products, Inc.
    Inventor: Michael Sharp
  • Patent number: 5431565
    Abstract: Scaler consisting of a body comprising at its proximal end a device of known type for rapid connection to the lead of the dental unit, and leaving its distal end a scaling curette, and at its inside a vibration-generation device, characterized in that the scaling curette forms an integral part of the vibration-transmission device, and in that it cannot be detached therefrom.
    Type: Grant
    Filed: April 6, 1993
    Date of Patent: July 11, 1995
    Assignee: Micro Mega SA
    Inventor: Hubert Euvrard
  • Patent number: 5395240
    Abstract: An ultrasonic handpiece wherein the entire assembled handpiece may be sterilized with an ingress of the sterilizing fluid into the interior of the handpiece. The handpiece is formed with an elongated housing sleeve and a coil unit for establishing an alternating magnetic field located therein. The housing sleeve and coil unit is assembled such that crevices are formed between the ends of the housing sleeve and coil unit, thus allowing steam, chemicals and heat to pass in and out of the interior of the handpiece for more rapid and thorough sterilizing of the handpiece. Further, the coil unit is not potted to the housing sleeve in order to allow for different thermal coefficients of expansion between materials without the buildup of undue stress.
    Type: Grant
    Filed: September 14, 1993
    Date of Patent: March 7, 1995
    Assignee: Dentsply Research & Development Corp.
    Inventors: Richard H. Paschke, Marty I. Septimus, George E. Warrin, Michael P. Parr
  • Patent number: 5382162
    Abstract: An ultrasonic dental scaler device includes a handpiece having a removable outer sheath secured thereto. After performing a scaling procedure on a patient's teeth, the outer sheath is easily removed from the dental scaler handpiece and sterilized. A completely sterile sheath is secured to the dental scaler handpiece for use with each patient thereby preventing cross-contamination among different patients.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: January 17, 1995
    Assignee: Parkell Products, Inc.
    Inventor: Michael C. Sharp
  • Patent number: 5378150
    Abstract: Disclosed is a suction hood assembly that is attachable to an ultrasonic handpiece, as well as to a source of suction. The suction hood assembly includes a portion thereof that opens in an area adjacent the ultrasonic tip to provide an area of influence of the suction and thereby recover microdroplets of body fluids, matter and water mist. The suction can be used to control the size of the aerosol envelope generated when the water stream from the ultrasonic device is directed toward the ultrasonic-moving tip. The size of the aerosol envelope can be substantially reduced to a small area of operation, thereby minimizing the dispersion of germs, viruses and body fluids from the patient to the surgeon. The suction tube assembly is easily attached or removed from the ultrasonic handpiece, is easily manufactured, cost effective and thus is disposable.
    Type: Grant
    Filed: June 18, 1992
    Date of Patent: January 3, 1995
    Inventor: Stephen K. Harrel
  • Patent number: 5369831
    Abstract: A removable brush-head for an ultrasonic toothbrush for daily dental hygiene purposes, including a plurality of bristle clusters, a substantially tubular body constructed of a flexible material and tensioning means securing the brush-head to the ultrasonic device, providing for the efficient transmission of ultrasonic frequency vibrations from the device via the brush-head to the teeth and gums and oral tissue of the user to loosen and remove soft plaque therefrom and to treat oral lesions.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: December 6, 1994
    Assignee: Sonex International Corporation
    Inventor: Robert T. Bock
  • Patent number: 5355587
    Abstract: An ultrasonic cutter suitable for cutting a fixation dressing used for orthopedic treatment of affected body parts so as to remove the dressing from an orthopedically bandaged body part, wherein in order to ensure structural simplification as well as a safe and easy cutting operation, the ultrasonic cutter includes a cutting blade (4) which is provided with a cutting edge on a side face (4A) only thereof, the leading end portion (4B) of the cutting blade (4) being round in shape and being provided with no cutting edge.
    Type: Grant
    Filed: December 16, 1992
    Date of Patent: October 18, 1994
    Assignees: Suzuki Motor Corporation, Alcare Co., Ltd.
    Inventors: Naomitsu Takekawa, Yukihiro Katou, Masahiko Yano, Atsushi Horiuchi, Tomoyuki Fujisaki
  • Patent number: 5323796
    Abstract: An automated dental flosser (10) comprises a pair of pivotally supported tines (18) which support a movable floss span (17). A pair of rotatably supported subcapstans (38, 40) are floss-connected to each end of the floss span, respectively, and are alternately driven to reciprocate the span longitudinally. A floss dispensing spool (50) and a floss take-up spool (56), floss-connected to respective subcapstans, dispense and take up floss. A floss-engaging portion of each subcapstan differs from the other in diameter to result in a net transfer of the floss from one spool to the other. Means for reciprocating the tines moves the span up and down. A pair of stationary shield tines (16) shield the user's teeth from the reciprocating tines. A second embodiment (90) includes an astable pulse generator (106) that generates a train of pulses of alternately reversing electric charge. Pulses of one charge are of longer duration than those of the other charge.
    Type: Grant
    Filed: September 24, 1992
    Date of Patent: June 28, 1994
    Assignee: DynaProducts, Inc.
    Inventor: Charles L. Urso
  • Patent number: 5320530
    Abstract: An endodontic tool has a working tip including two cylindrical segments connected together lengthwise and terminating in a conical tip. The cylindrical segment which connects directly to the conical tip is smaller in diameter than the second cylindrical segment, whereby a shoulder is provided at the intersection of the two cylindrical segments. The conical tip and first cylindrical segment have surfaces for removing tooth material when the tool is vibrated at sonic frequencies. A stem connects to the second cylindrical segment at a right angle and is connectable to a conventional sonic hand piece so that vibratory energy generated within the hand piece is transmitted to the working tip by way of the stem. The hand piece provides vibratory motion generally along its longitudinal axis, and the stem is received in the hand piece with the stem axis at an angle to the longitudinal axis of the hand piece.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: June 14, 1994
    Inventor: Cheng D. Fong
  • Patent number: 5320532
    Abstract: Method and device for fracturing the interface between dental structures that have been secured together, and for adhesive removal and cleaning of the teeth. The device comprises an ultrasonic tool for providing hi-directional movement of a preferred amplitude and frequency. The tool is applied against one of the dental structures at an acute angle with respect to a plane in which the interface between the dental structures lies. Alternatively, the dental tool is applied against the adhesive on the tooth surface for removal thereof. In another alternative, the dental tool is utilized with a liquid layer to provide cavitation of the liquid, thereby cleaning and polishing the enamel surface.
    Type: Grant
    Filed: April 21, 1992
    Date of Patent: June 14, 1994
    Assignee: Ormco Corporation
    Inventors: Farrokh Farzin-Nia, Rohit C. L. Sachdeva, Howard M. Alliger
  • Patent number: 5314333
    Abstract: A device for generating oscillations for dental applications has an actuator connectable to an energy source and provided with a lifting member. The actuator is connected via a hydraulic linkage to the working device. Via the hydraulic linkage the oscillations generated by the actuator are transmitted onto a workpiece, for example, a crown. With this embodiment it is possible to transmit the mechanical oscillations generated by the actuator onto the crown so that the binder between the crown and the tooth stump is evenly distributed and compressed in a short period of time.
    Type: Grant
    Filed: October 9, 1992
    Date of Patent: May 24, 1994
    Assignee: Joachim Irmer
    Inventors: Joachim Irmer, Detlef Kersting
  • Patent number: 5236358
    Abstract: An ultrasonic dental handpiece having a thin, flexible, elongated abrasive tool attached thereto for removing calculus deposits from the surface of teeth. A thin, flexible abrasive tool having a specifically selected diameter is used in conjunction with an ultrasonic handpiece for the purpose of removing calculus from deep within a periodontal pocket without traumatizing the surrounding tissue and bone. The use of a diamond coated abrasive tool aids in tactually detecting fine calculus deposits deep below the gum line. An annular aperture surrounding the circumference of the abrasive tool is used to provide a fluid spray for washing away loosened calculus. The ease and efficiency of calculus removal is greatly enhanced.
    Type: Grant
    Filed: April 27, 1992
    Date of Patent: August 17, 1993
    Inventor: William J. Sieffert
  • Patent number: 5188531
    Abstract: The present method and apparatus are directed to the treatment of periodontal disease. A contoured, calibrated instrument is employed to probe the gum tooth interface to locate periodontal lesions containing bacteria and their by-products such as plaque, calculus, and diseased tissue. After the prove has identified a periodontal lesion, a vibrating instrument having a configuration similar to the probe is inserted into the periodontal pocket in a manner so as to perferentially contact the tooth. The frequency and power used to drive the vibrating instrument is adjusted to a level sufficient to cauese the instrument to fracture the cementum and cause the instrument to fracture the dentin of the tooth leaving the dentinal tubuli exposed. The lesion is irrigated during treatment with a vibrating instrument with solution having preferably a pH between about 5 and 5.5.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: February 23, 1993
    Inventor: Lloyd Von Sutfin
  • Patent number: 5138733
    Abstract: An ultrasonic toothbrush for daily removal of soft plaque including a handle constructed of a rigid material, a battery pack, an electronics driving module, a piezoelectric member, and a removable brush-head. The low voltage DC energy supplied by the battery pack is converted to an ultrasonic frequency DC current by the electronics driving module. The piezoelectric crystal resonates, expands and contracts volumetrically, in the tune with the frequency supplied by the electronics driving module and thereby converts the electronic energy into sound-wave energy. The sound-waves driving the dentifrices in the mouth of the user against the teeth causing mild cavitation within the dentifrices at the junction with the teeth, resulting in a loosening effect on the soft plaque on the surface of the teeth and in the periodontal pockets formed in the gums around the neck of the teeth. The loosened soft plaque is then dislodged by the bristle clusters of the toothbrush by the normal brushing movements of the user.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: August 18, 1992
    Assignee: Sonex International Corporation
    Inventor: Robert T. Bock
  • Patent number: 5106302
    Abstract: Method for fracturing the interface between dental structures that have been secured together. The device comprises an ultrasonic tool for providing bi-directional movement of a preferred amplitude and frequency. The tool is applied against one of the dental structures at an acute angle with respect to a plane in which the interface between the dental structures lies.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: April 21, 1992
    Assignee: Ormco Corporation
    Inventors: Farrokh Farzin-Nia, Rohit C. L. Sachdeva, Howard M. Alliger
  • Patent number: 5094617
    Abstract: A drilling tool for dental retro-filling preparation comprises an ultrasonic transducer head and one or more elongate drill members for selectively securing to the transducer head. The or each drill member comprises an elongate shaft having a suitable securing mechanism at one end for coupling to the transducer head and a hooked portion at the opposite end comprising the drilling tip which projects at an angle to the remainder of the shaft. The hooked end portion of the shaft is inserted through an appropriate opening in the jawbone until it is located adjacent the tooth root and aligned with the axis of the root, and the transducer head is switched on to cause ultrasonic vibrations in the tip which cut a bore in the tooth root.
    Type: Grant
    Filed: December 11, 1990
    Date of Patent: March 10, 1992
    Inventor: Gary B. Carr
  • Patent number: 5059122
    Abstract: A dental scaler comprises a hollow sleeve and, arranged inside it, a vibrating piezoelectric transducer bearing a scraper, the extremity of which protrudes from the sleeve, and includes an amplifier connected to the transducerk. The transducer includes a base, of a series of piezoelectric chips on the surfaces of which are arranged electrodes connected in such a manner as to define an input and an output, and a head to which the scraper is coupled. The amplifier has an input, an output and two feeder terminals receiving a low direct voltage by way of a cable connected to an external source of voltage. The output and input of the transducer are connected, respectively, to the input and the output of the amplifier to form an oscillator, the frequency of which is determined by the resonant frequency of the transducer coupled to the scraper.
    Type: Grant
    Filed: April 25, 1989
    Date of Patent: October 22, 1991
    Assignee: Bien-Air S.A.
    Inventor: Max Hetzel
  • Patent number: 4991249
    Abstract: An ultrasonic toothbrush for use in personal dental hygiene care includes an exchangeable toothbrush member which is removably attached to an ultrasonic power member and may be readily removed therefrom with less than one revolution and inserted on to the ultrasonic power member in a like manner. Provision is made for locking the toothbrush to the power member and is arranged to transfer the ultrasonic energy from the power member to the toothbrush with minimum energy loss.
    Type: Grant
    Filed: February 9, 1989
    Date of Patent: February 12, 1991
    Inventor: Leonard W. Suroff
  • Patent number: 4992048
    Abstract: A broaching tool has a needle-shaped working portion (2) and a shank portion which is shaped for attachment in the distal end (18) of a drive bar (12) of a drive instrument for the tool. The shank portion of the tool has at least one bend (8) and preferably also a second oppositely directed bend (10). A proximal end (14) of the drive bar (12) of the drive instrument is adapted to be coupled to a vibratory element (16) which, thereby, is able to generate longitudinal high frequency vibrations in the drive bar (12). The distal drive bar end (18) is angled (B) about an axis (22) which acts as a hinge having a certain rigidity of bending. By adapting and matching a. o. the angle (B) and the bends (8, 10) in the tool, it is possible to compensate away distructive natural oscillations in the tool which, thereby, can be powered and used with high working frequencies without risk of fatigue fractures in the material of the tool.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: February 12, 1991
    Inventor: Sven K. L. Goof
  • Patent number: 4961698
    Abstract: An ultrasonic device includes an auxiliary chamber for receiving an additive in tablet form. The ultrasonic device includes an ultrasonic tool which is connected to an ultrasonic vibrator by a shank. A sleeve surrounds the shank and defines an annular space therewith. Cleansing fluid, in particular water, flows through the annular chamber and exits in the area of the tool. The auxiliary chamber is formed by an axial bore extending through the sleeve and communicating with the annular chamber. A cap closes the outer end of the bore and the bore is dimensioned for receiving a tablet containing the additive. Some of the fluid in the annular chamber passes through the auxiliary chamber to dissolve the tablet and introduce the additive into the stream of fluid before it is discharged at the ultrasonic tool.
    Type: Grant
    Filed: June 16, 1989
    Date of Patent: October 9, 1990
    Inventor: David G. Vlock
  • Patent number: 4911639
    Abstract: An improved ultrasonic handpiece adapter for use in root canal procedures is provided in which a fire well is formed in the body of the device. The lower surface of the file well is frusto-conical in shape and receives a file wherein an enlarged file head has a frusto-conical shape at its bottom which seats against the lower surface of the file well when downward pressure is exerted on the file and which floats with respect to the lower surface of the file well when upward pressure is exerted on the file. A clutch mechanism is thereby provided wherein the file blade is in its engaged position during a cutting stroke and wherein the file blade floats during the motion of positioning the blade for the next cutting stroke. A cutting file has the tip of its shank flared so that the shank is prevented from being pulled through the file head. The apparatus may be connected to a conventional source of sub-sonic or ultrasonic power.
    Type: Grant
    Filed: November 21, 1985
    Date of Patent: March 27, 1990
    Inventor: John J. Jacklich
  • Patent number: 4850875
    Abstract: A filling and forming system for dental viscous plastic materials utilizing ultrasonic vibrations in which a dental plastic material possessing viscousness (such as light polymerizable type composite resins) is used in the mouth cavity. Generation of ultrasonic vibrations from the tip of a forming instrument and application thereof to a dental material are obtained without generating heat in the absence of poured water. The effect of the ultrasonic vibrations permits the prevention of the adhesion of the material to the instrument. Additionally, it decreases the consistency of the material, thus making the filling and forming of the material easy and enhancing the close adaptation of the material.
    Type: Grant
    Filed: January 5, 1988
    Date of Patent: July 25, 1989
    Assignees: Toshio Takatsu, G-C Dental Industrial Corp.
    Inventor: Toshio Takatsu
  • Patent number: 4840566
    Abstract: A tool holder is furnished for fastening a dentistry-type tool to be subjected to vibrations. A core is attached to a generator of vibrations and includes a housing for a tool. A locking assembly cap having a rear end is fitted onto a forward area of the core. A locking assembly sliding component is placed over a rear area of the core for contacting the rear end of the core with front end of the locking assembly cap. A compressive spring engages the core and the locking assembly sliding component for pushing the locking assembly sliding component in a forward direction.
    Type: Grant
    Filed: June 2, 1987
    Date of Patent: June 20, 1989
    Assignee: Micro-Mega
    Inventor: Henri Leonard
  • Patent number: 4840563
    Abstract: Dental equipment having means for delivering RF and LF energy to a dental handpiece. Given a supply of RF energy, the dental equipment transmits a further energy that is significantly lower-frequency in comparison to the RF energy or a DC voltage for supplying a lamp located in the handpiece without disturbing influences. A common transmission cable is provided for the transmission of the RF energy and of the energy for the lamp, this common transmission cable contains an inner conductor and a shielded line arranged coaxially relative thereto and has a third conductor for transmission of the energy for the lamp. This third conductor is arranged relative to the shielded line such that a high capacitive coupling exists between shielded line and third conductor.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: June 20, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventor: Hans-Walter Altendorf