Abstract: A device for disinfecting and/or sterilization of a dental cavity includes: an electrode pair that extends into the cavity to provide current along a portion of the cavity; and a controller that sends controlled electrical energy to the cavity via current flowing between the electrodes when located in the cavity, thereby to provide electrical energy for disinfection and/or sterilization.

Abstract: A device for disinfecting and/or sterilization of a dental cavity includes: an electrode pair that extends into the cavity to provide current along a portion of the cavity; and a controller that sends controlled electrical energy to the cavity via current flowing between the electrodes when located in the cavity, thereby to provide electrical energy for disinfection and/or sterilization.

Abstract: A device for disinfecting and/or sterilization of a dental cavity includes: an electrode pair that extends into the cavity to provide current along a portion of the cavity; and a controller that sends controlled electrical energy to the cavity via current flowing between the electrodes when located in the cavity, thereby to provide electrical energy for disinfection and/or sterilization.

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.

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.

Abstract: An endodontic file for a motorized rotary handpiece includes a coupler element for coupling to the handpiece, a central longitudinal flexible core including a central flexible cable supported by the coupler element, and a helical wire surrounding the core and extending toward a tip of the core opposite the handle end. The flexible core includes a first plurality of inner strands twisted together in a first direction and surrounded by a second plurality of outer strands twisted in an opposite direction. The tip of the core is chamfered and unbonded and protrudes beyond the helical wire at the tip whereby in use reversing a direction of rotation of the endodontic file after the tip of the core reaches the apex of the root canal, unwinds the outer strands, which operate as a brush during removal of the endodontic file from the root canal.

Abstract: An endodontic file for a motorized rotary handpiece includes a coupler element for coupling to the handpiece, a central longitudinal flexible core including a central flexible cable supported by the coupler element, and a helical wire surrounding the core and extending toward a tip of the core opposite the handle end. The flexible core includes a first plurality of inner strands twisted together in a first direction and surrounded by a second plurality of outer strands twisted in an opposite direction. The tip of the core is chamfered and unbonded and protrudes beyond the helical wire at the tip whereby in use reversing a direction of rotation of the endodontic file after the tip of the core reaches the apex of the root canal, unwinds the outer strands, which operate as a brush during removal of the endodontic file from the root canal.

Abstract: 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.

Abstract: A root canal length measurement device configured for detachable support on a neck of a dental handpiece and having a generally cylindrical electrical contact element that, in use, is resiliently biased by a spring toward an endodontic file rotatably mounted in the handpiece so that a flat surface of the contact element maintains a steady electrical connection with a shank portion of the endodontic file proximate its point of attachment to the handpiece.

Abstract: An endodontic file (2) for use with a dental instrument has at least one cord (6) and a wire (8) wound around at least a major portion of the cord and having an abrasive outer surface (10). A handle having a gripping section is provided for gripping the end of the file and is coupled to the file by a coupler that may be made of a vibration absorbing material.

Abstract: An endodontic file has at least a central longitudinal cord, a helically wound wire at least partially surrounding the cord and an elastomeric grip partially covering the helically wound wire near a first end thereof. The elastomeric grip has 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.

Abstract: A device for disinfecting and/or sterilization of a dental cavity comprising: an electrode pair adapted to extend into said cavity to provide current along at least a portion of the cavity; and a controller configured for sending controlled electrical energy to said cavity via current flowing between the electrodes when located in said cavity, thereby to provide electrical energy for said disinfection and/or sterilization.

Abstract: An endodontic file (2) for use with a dental instrument has at least one cord (6) and a wire (8) wound around at least a major portion of the cord and having an abrasive outer surface (10). A handle having a gripping section is provided for gripping the end of the file and is coupled to the file by a coupler that may be made of a vibration absorbing material.

Abstract: The invention provides a transdermal, transmucosal pharmaceutical composition suitable for substantially extra-vascular application of at least one biologically active substance to biological membranes of a mammal, comprising a pharmaceutical or cosmetic composition comprising propylene carbonate at least one oil or source of fatty acid or surfactant; and water; in combination with the at least one biologically active substance wherein the propylene carbonate is adapted to enhance the bioavailability of the at least one biologically active substance.

Abstract: An ultrasonic dental handpiece for holding a transducer is provided. The transducer converts electrical energy into ultrasonic vibrations. The dental handpiece includes a body, a rotator head, and a retainer ring. The body rotatably receives the transducer. The rotator head engages the transducer for rotation thereof. The retainer ring is fixedly coupled to one of the body and the rotator head and rotatably coupled to the other of the body and the rotator head, such that the rotator head is rotatably coupled to the body.

Abstract: The present invention relates to a wireless remote control for dental equipment, such as dental scaler tools, dental drills, prophy angles and other rotary instruments. The wireless control switch can control the on and off state of the dental tool, or it can also be programmed to control the speed of the tool by a switch on the tool. The wireless control switch can be in the form of, for example, a foot switch, and replaces manual and foot operated controls formerly connected by cables to the dental tools. This removes a potential safety hazard in the dentist's office and makes the equipment control more versatile and easier to adapt to various office conditions. The wireless control can be battery powered, further eliminating the need for cables.

Abstract: The invention provides a method for simulating a 3D sound environment in an audio system using an at least two-channel reproduction device, the method including generating first and second pseudo head-related transfer function (HRTF) data, first using at least one speaker and then using headphones; dividing the first and second frequency representation of the data or using a deconvolution operator on the time domain representation of the first and second data, or subtracting the cepstrum representation of the first and second data, and using the results of the division or subtraction to prepare filters having an impulse response operable to initiate natural sounds of a remote speaker for preparing at least two filters connectable to the system in the audio path from an audio source to sound reproduction devices to be used by a listener.

Abstract: An ultrasonic dental handpiece for holding a transducer is provided. The transducer converts electrical energy into ultrasonic vibrations. The dental handpiece includes a body, a rotator head, and a retainer ring. The body rotatably receives the transducer. The rotator head engages the transducer for rotation thereof. The retainer ring is fixedly coupled to one of the body and the rotator head and rotatably coupled to the other of the body and the rotator head, such that the rotator head is rotatably coupled to the body.

Abstract: The present invention relates to a wireless remote control for dental equipment, such as dental scaler tools, dental drills, prophy angles and other rotary instruments. The wireless control switch can control the on and off state of the dental tool, or it can also be programmed to control the speed of the tool by a switch on the tool. The wireless control switch can be in the form of, for example, a foot switch, and replaces manual and foot operated controls formerly connected by cables to the dental tools. This removes a potential safety hazard in the dentist's office and makes the equipment control more versatile and easier to adapt to various office conditions. The wireless control can be battery powered, further eliminating the need for cables.