| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | Endodontic obturator | US826831 | 1997-04-08 | US5833457A | 1998-11-10 | William B. Johnson |
| An obturator for use in filling an endodontically prepared root canal in a tooth formed as an elongated body having a handle portion and a shaft, the handle portion being configured for grasping by a practitioner whereby the shaft may be inserted into a root canal, the shaft tapering from the handle to the shaft distal end, the shaft having an exterior surface having a generally linear groove therein extending from near the handle to the shaft distal end, or at least adjacent the shaft distal end, the groove providing: (a) a channel for flow of excess filler material as the shaft is positioned into a prepared root canal; (b) increased flexibility of the shaft, and (c) a passageway that will accept a slender, tapered metallic retrieval tool, such as a typical endodontic file, to assist in the removal of the shaft from a root canal. | ||||||
| 82 | Slotted tap and lentulo drill for dental post system | US381428 | 1995-01-31 | US5669772A | 1997-09-23 | Barry Musikant; Allan S. Deutsch; Brett I. Cohen |
| A method and system for inserting a dental post into a tooth root canal. The method comprises the steps of cutting out a post hole in the tooth and inserting a threaded tap into the post hole for creating at least one groove along the hole. Significantly, the tap includes at least one slot defined by a pair of flexible legs and running at least a portion of the length thereof for reducing stress along the post hole during threaded insertion. Also provided is a lentulo drill comprising a spiraled wire with a reverse spiral configuration at the apical end thereof for confining cement placement in the post hole prior to insertion of the dental post. | ||||||
| 83 | Rotary handpiece for endodontic instruments | US520992 | 1995-08-30 | US5586886A | 1996-12-24 | James B. Roane |
| The present invention provides an improved rotary handpiece for cleaning and enlarging the root canal of a tooth with a rotary endodontic file. The handpiece includes a retractable support rod attached to and extending from the handpiece positioned adjacent and substantially parallel to the endodontic file. The support rod is adapted to rest on a tooth whereby the retraction of the support rod controls the advance of the endodontic file into the root canal. The control of the advance of the endodontic file insures that the file does not self thread into the canal or become excessively loaded whereby it sticks or breaks off while the root canal is being cleaned and enlarged. | ||||||
| 84 | Fiber-optic endodontic apparatus and method | US129408 | 1993-09-30 | US5503559A | 1996-04-02 | Sandor G. Vari |
| An endodontic apparatus and related method for the instant detection of the anatomical structure of a tooth and for the restoration of a dead or severely decayed tooth using induced fluorescence spectroscopy. A root canal probe having an optical fiber through its center transmits excitation light into the tooth's root canal. The excitation light induces the tissue within the root canal to fluoresce. The fluorescent light is collected by the optical fiber and transmitted back to a sensor that generates electrical signals indicative of the intensity of light within predetermined wavelength bands. The electrical signals are processed to identify the tissues within the root canal. The probe may include a slightly conical metal surface having flutes for shaving and removing dentin from within the root canal. Using the fluorescent emission properties of the tissues of components of a tooth, the entrance of the root canal is located. The root canal is cleaned and shaped and the apex of the root canal located using the difference between the fluorescence spectrum of the apex and the root canal. The root canal is sealed and filled by a light cure restorative delivered into the root canal through a tube. The light cure restorative is activated by light transmitted into the root canal by an optical fiber. The light activation and polymerization of the light cure restorative can be controlled by monitoring the intensity of the restorative's fluorescence spectrum. | ||||||
| 85 | Color-coded endodontic cutting instruments and color-code system and method | US197644 | 1994-02-14 | US5498158A | 1996-03-12 | Nelson J. Wong |
| A set of endodontic cutting instruments, each having handles and each having a different working tip diameter incrementally increasing in size from one instrument to the next. The set includes a first smaller standard size endodontic cutting instrument having a grasping end with a first color according to a standard color code, a second larger standard size endodontic cutting instrument having a grasping end with a second color according to the standard color code and a non-standard intermediate size endodontic instrument having a size between the first smaller standard size and the second larger standard size and having a grasping end with a color combination including a first portion having the first standard color corresponding to the first smaller standard size and a second portion having the second standard color corresponding to the second larger standard size. | ||||||
| 86 | Fluid dispensing assembly and adapter means therefor | US114321 | 1993-08-30 | US5378149A | 1995-01-03 | John J. Stropko |
| A fluid dispensing assembly 10 of the type for dispensing a precise stream of a fluid, such as a liquid and/or gas is disclosed. The fluid dispensing assembly 10 comprises of a fluid dispensing instrument or fluid source means 12, a needle apparatus 14, and is characterized by an adapter 16 for connecting the fluid dispensing instrument 12 to the needle apparatus 14 to establish fluid communication therebetween. | ||||||
| 87 | Removing a post embedded in a tooth | US846662 | 1992-03-05 | US5173049A | 1992-12-22 | Guy Levy |
| A process for cleaning and/or shaping passages, comprising providing an optical fiber having a diameter sufficiently small to be introduced into the passage and having a free end provided with a radiation focussing element; introducing the free end of the fiber into the passage so that the focal point defined by the radiation focussing element is located adjacent the region to be cleaned or shaped; providing a liquid in the passage at the location of the focal point of the radiation focussing element; and supplying pulses of laser radiation to the fiber so that the radiation exits the fiber via the free end to provoke a cavitation of vapor at the interior of the irrigating liquid. | ||||||
| 88 | Dental apparatus intended for driving an instrument for endodontic surgery | US865202 | 1992-04-08 | US5169312A | 1992-12-08 | Pierre Berlin |
| The apparatus of the contra-angle type comprises an instrument holder sleeve driven in a combined movement of alternate rotation and translation by an eccentric stud fixed to the end of a flexible shaft consisting of a metal cable. It comprises a device for controlling the flexibility of the end of the cable, this device consisting of a ring mounted rotatably in a support which can slide in the body of the apparatus. | ||||||
| 89 | Dental detection apparatus for position of root apex | US667995 | 1991-03-12 | US5112224A | 1992-05-12 | Kazunari Shirota |
| A dental detection apparatus for the position of a root apex comprises two oscillators for generating the currents having two different frequencies passing between a single electrode contacting to a patient's body and a reamer, a differential amplifier for detecting the difference .DELTA.V of the respective impedance variations of these currents, a direct current amplifier for amplifying the output of the differential amplifier to input to a meter, a comparator for connecting the output side to a two contact analog switch, the input side of the comparator being connected to the OUT of the direct current amplifier, a binary up/down counter for switching the input frequencies to the count down condition or the count up condition by the switching operation of the two contact analog switch, a D/A converter for connecting the output side to the differential amplifier so as to operate the offset of the differential amplifier, while the input side being connected to the OUT of the binary up/down counter, and an automatic calibration switch for passing the frequency signal transmitted from one of the two oscillators by ON operation to the binary up/down counter through the two contact analog switch. | ||||||
| 90 | Dental system for treating a root canal | US505885 | 1990-04-06 | US5017134A | 1991-05-21 | Tsuyoshi Saito; Masaru Yamaoka |
| The present invention relates to dental equipment for treating a root canal. According to the present invention, two input signals with different frequencies are superposed. The difference between impedances corresponding to the two different frequencies at a given position in the root canal where the impedances hardly vary, is obtained. This value and a clinically determined value are used to detect the desired position in the root canal. | ||||||
| 91 | Endodontistry bit set | US216786 | 1988-07-08 | US4971556A | 1990-11-20 | Francesco Ritano |
| The pulp canal of a tooth requiring filling is hollowed out using boring bits fitted to and driven by a vibrating instrument; the bits are organized in sets, with a number of discrete sets making up the full range. The abrasive tine of the bits of each set is tapered; its length and tip diameter remain the same throughout the set, whereas the diameter at the point where it joins with the shank increases progressively from the smallest to the largest size. | ||||||
| 92 | Method and apparatus for use in endodontic treatment | US58159 | 1987-06-04 | US4789335A | 1988-12-06 | Paul Geller; Steven Berkowitz |
| Method and apparatus for use in endodontic treatment include providing a one-way valve in the root canal system of a tooth undergoing endodontic therapy by which pressure which may build-up in the root canal system due to the production of purulence or gases from necrosing and/or infected tissue is vented from the root canal system and by which unobstructed drainage of the tooth is permitted, while at the same time food debris and foreign matter are prevented from entering and/or becoming packed within the root canal system thereby eliminating the possibility of the canal system becoming plugged and/or reducing introduction of bacteria into the root canal system. A method is disclosed for fitting a tooth with a one-way valve in a simple yet stable manner. | ||||||
| 93 | Dispensing pump for syringe | US897928 | 1986-08-19 | US4700872A | 1987-10-20 | Paul H. Keyes; Marvin J. Taves |
| A pump for dispensing liquid via a syringe has a chamber in which a hollow cylinder is mounted. The cylinder is connected to the chamber via a first normally closed check valve. A hollow plunger reciprocates in the cylinder is connected thereto via a second normally closed check valve. A charge of liquid is placed in the hollow plunger. On the out-stroke of the piston, the liquid in the piston is sucked through the second normally closed check valve into the cylinder and on the in-stroke of the plunger the liquid is forced through the first normally closed check valve into the chamber wherein it is maintained under pressure created by the pumping action of the plunger. An outlet tube leads from the lower part of the chamber to a syringe and an normally closed pinch valve in the syringe is manually operable to permit liquid under pressure to be squirted from the syringe. | ||||||
| 94 | Endodontic material and method | US543314 | 1983-10-19 | US4645457A | 1987-02-24 | Melvin Goldman; Dan Nathanson |
| The invention herein comprises methods and products for attaching a crown replacement on an endodontically treated tooth. The superior surface of the tooth is shaped to receive the base of the crown replacement and an interior space is machined into the root canal to accept placement of a post. The instrumented area is then flushed with a chelating agent followed by an organic solvent. A cementing medium having great compressive strength is placed around a post fitted into the cavity. After the cement has set, a quantity of filler material is placed around the remaining exposed part of the post. This post forms the support for the crown replacement. If desired, a preformed crown replacement may be placed over the cemented structure until a permanent crown can be made. | ||||||
| 95 | Atraumatic endodontic reconstruction system and process | US318935 | 1981-11-06 | US4400160A | 1983-08-23 | Leopold P. Lustig; Alfred H. Rosen |
| The invention achieves its purposes with a grommet thimble incorporating a bore sleeve which may be fitted with retainer means for a sanitary dam. When this thimble is fitted into the specially-prepared entrance portion of a root canal, the retainer means extends from the tooth for holding a dam of rubber or the like without injury to surrounding gingiva during placement of a clamp for the rubber dam. The root canal can be prepared with the sleeve and dam in place, the sleeve and dam serving to facilitate the establishment and maintenance of a sterile field of operation without creation of unnecessary lacerations on the surrounding gingiva. After completion of the desired preparation procedure, or of partial completion, a temporary plug can be removably fitted into the sleeve protection of the work done or in process. For completion of a restoration several options are available. The retainer means can be left in place and used to anchor a core with or without a post. Alternatively a post can be fastened (e.g. screwed) into the sleeve, with or without keeping the retainer means. | ||||||
| 96 | Dental root canal-treating appliance | US338212 | 1982-01-11 | US4384852A | 1983-05-24 | Motonori Yamauchi; Fumio Tanaka; Churyo Suzuki |
| Dental root canal-treating appliance usable for cleaning pulp cavity and/or for application of medicine in the treatment of the root canal, the appliance being in the form of a slender rod of the diameter larger than 0.3 mm and of the length about 30 mm with appropriate numbers of continuous slits or conduits for absorption of liquid and/or blood in the canal and/or for retention of the medicine, at least one end of the rod, over the length less than about 2 mm from the tip, a thinner end section of the diameter about 0.25 mm being formed so that a shoulder is formed, the shoulder acts as an engagement-edge or stop-edge against the bottom of the canal and apical foramen in the diseased teeth. | ||||||
| 97 | Tool holder | US58379 | 1979-07-17 | US4295829A | 1981-10-20 | Claude Martinelli; Marcelle Martinelli epouse Boisson |
| A tool holder having a bent handle and having first and second ends. The holder comprises a head comprising means for receiving the tool. The head is arranged at the first end of the tool holder. The holder further comprises an operating knob arranged intermediate the first and second ends of the holder and securing means for securing the head to the holder. An auxiliary operating knob is arranged at the second end of the holder on the handle. A multiplier system provides for the desired magnitude of movement of the tool in response to movement of the operating knob. | ||||||
| 98 | Cannula and process | US103935 | 1979-12-14 | US4276880A | 1981-07-07 | Oscar Malmin |
| An improved cannula for utilization with and attachment to a dental instrument capable of selectively and alternatively injecting liquid under pressure and providing a vacuum for aspirating purposes and a process for utilizing the cannula. The improved cannula has a through central bore opening into the first end of the cannula body and has a second end that is either open to said bore or closed. Opposed slots or openings are provided in the cannula body adjacent the second end of the cannula and provide communication between the exterior of the cannula and the central bore, and also means for attaching the cannula to an instrument such as described above are provided on the body thereof. A modified form of the invention has a fully closed second end and a single elongate radiused "window" opening closely adjacent the closed end. | ||||||
| 99 | Dental therapeutic device | US882075 | 1978-03-01 | US4198977A | 1980-04-22 | Yasuhiro Aoki |
| Disclosed is a device advantageously usable for dental therapy and examination, which is an elongated bundle of axially extending fibers. The elongated bundle is tapered at one or both of its ends, and the fibers are bonded to each other in places along their lengths so that the fiber bundle is coherent and the fibers define capillary passageways therebetween. | ||||||
| 100 | Interchangeable tool operating apparatus with plural motion | US861643 | 1977-12-19 | US4173828A | 1979-11-13 | Leopold P. Lustig; Leonard L. Krasnow |
| Novel tool operating apparatus is exemplified in a dental treatment device capable of driving alternatively at least a first tool and a second tool, each tool being intended to execute a different form of motion, with a single tool driving means to which each of several different tools can be removably coupled. The driving means includes a rotatable drive shaft fitted with tool engagement means in the form of a disc affixed to the shaft and lying in a plane that makes an acute angle with the rotational axis of the shaft. One tool can be fitted over the shaft to engage the disc so as to rotate the tool with the shaft. A second tool can be fitted over the shaft so that the shaft can rotate within the tool, but the tool will not rotate with the shaft. The second tool has means for cooperating with the shaft so as to execute an oscillatory motion relative to the shaft axis. Tools capable of two optional forms of oscillatory motion are disclosed--in one the motion is parallel to the axis of the shaft; in another the motion is nutational. The drive shaft can be provided with a fluid passage on its rotational axis through which to provide fluid such as a dental treatment agent to the tools, and each form of tool can be fitted with ducts for dispensing such an agent. Further tools suitable for endodontal use are disclosed. | ||||||
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