摘要:
This invention relates to a dental reamer used in dental treatment for forming a root canal, in which the dental reamer prevents digging into a root canal wall and deviation even when attached to a handpiece and driven by an engine. With this reamer, a spiral working portion is formed by grinding and cutting away a tapered rod with two oppositely faced lines, and then, the ground material left with two arcs and a center of a circle is inserted into a molding space comprised of a pair of holding jigs and support jigs to perform the twist-process. In association with the twist-process, a cutting portion and a flank portion are formed on both ends of the working portion.
摘要:
Die Erfindung bezieht sich auf ein Wurzelkanalinstrumentenset mit zumindest zwei Wurzelkanalinstrumenten, wobei jedes Wurzelkanalinstrumt einen Hals 1 mit einem Schaftende 2 an einem Ende und mit einem mit zumindest einer Schneidkante versehenen Arbeitsteil 3 am anderen Ende aufweist, wobei der Arbeitsteil 3 konisch oder ballig ausgebildet ist, dadurch gekennzeichnet, dass die Konuswinkel der Arbeitsteile 3 vom vorhergehenden Wurzelkanalinstrument zum nächsten Wurzelkanalinstrument abnehmen und dass der Arbeitsteil 3 des jeweils vorhergehenden Wurzelkanalinstruments einen größeren Durchmesser aufweist, als der Arbeitsteil 3 des jeweils nachfolgenden Wurzelkanalinstruments, oder dass die Radien der balligen Arbeitsteile 3 vom vorhergehenden Wurzelkanalinstrument zum nächsten Wurzelkanalinstrument zunehmen und dass der Arbeitsteil 3 des jeweils vorhergehenden Wurzelkanalinstruments einen größeren Durchmesser aufweist, als der Arbeitsteil 3 des jeweils nachfolgenden Wurzelkanalinstruments.
摘要:
The present invention is a medical implant or device (2) fabricated, in any manner, from a niobium (Nb) - titanium(Ti) - zirconium(Zr) - Molybednum(Mo) alloy (NbTiZrMo alloy). The implant or device has components at least partially fabricated from a metal alloy comprising a) between about 29 and 70 weight percent Nb; b) between about 10 and 46 weight percent Zr; c) between about 3 and 15 percent Mo; and a balance of titanium. The inventive alloy provides for a uniform beta structure which is corrosion resistant, and can be readily processed to develop high-strength and low-modulus, with the ability for conversion oxidation or nitridization surface hardening of the medical implant or device.
摘要:
The invention concerns a device comprising means for indicating a value representing current fatigue and means for modifying said value based on parameters related to the use of the odontological instrument. In a particular embodiment, the means indicating the fatigue value comprises a washer (16) connected to the instrument and provided with a certain predetermined number of detachable elements or pre-perforations (17). Depending on the use of the instrument, for example its diameter, its taper ratio, the curve of the dental canal to be excavated and the duration of the operation, a certain number of detachable elements are removed or a certain number of pre-perforations are perforated (17'). When the number of detachable elements or the number of pre-perforations (17) remaining on the device is less than the number of elements to be detached or perforated on the basis of the predetermined operational parameters, the odontological instrument should no longer be used. Said device enables to avoid the odontological instrument being broken in a dental canal.
摘要:
The use of antiseptics in root canal treatment so as to reduce the proliferation of bacteria and other microorganisms remaining i n the root canal after obturation.
摘要:
A non-circular endodontic instrument (110) is provided for reduced stress to the tooth, and to the cutting instrument during the removal of dentin from a root canal. The non-circular endodontic instrument (110) includes at least one area of non-contact (140), i.e., one portion of the instrument does not contact, and does not cut the dentin material. The non-contact area (140) extends the length of the endodontic instrument (110), about a portion of the circumference of the instrument, and interrupts a generally circular cutting face (120) of the instrument. This non-contact area (140) reduces stress, provides a place for debris to gather during cutting so as to not interfere with the cutting face (120), and serves to direct the debris out of the root canal. The endodontic instrument (110) can be D-shaped in cross-section. It could have circumferential opposing non-contact, areas and/or can be elliptical in cross-sectional shape.
摘要:
Die Erfindung bezieht sich auf ein Wurzelkanalinstrument mit einem Handgriff 1, welcher länglich und im wesentlicher rotationssymmetrisch ausgebildet ist und dessen mittlerer Bereich 2 mit einem geringeren Durchmesser versehen ist, dadurch gekennzeichnet, dass an dem mittleren Bereich 2 geringeren Durchmessers mehrere Noppen 3 ausgebildet sind.
摘要:
A composition for endodontically treating a root canal is provided. The composition uses a thermoset resin based material adapted for insertion into the root canal of a dental patient and an adhesive material suitable for maintaining the polymer based material in the root canal. Either one or both of the thermoset resin based material and the adhesive material is conductive. As a result, the dental practitioner is able to determine where the apex of the root canal is located by means of measuring the conductance between the thermoset resin based material and the oral mucosa and periodontal ligament. This facilitates the filling of the root canal with the polymer based material.
摘要:
The present invention is directed to a method for anesthetizing teeth which does not require an injection into the gum in order to anesthetize a tooth (or teeth) which requires attention. The method comprises the step of applying a composition having a high concentration of potassium to a tooth requiring caries removal or manual manipulation thereof. The composition is adapted to anesthetize the tooth so that the tooth may be drilled or manually manipulated. It has been discovered that the potassium enters the dentinal tubules and odontoblastic fibrils and penetrates the pulpal tissues of the tooth for anesthetizing the tooth without having to inject anesthetics into the gum surrounding the tooth.