Abstract: A dental post for retention a dental restoration onto a prepared tooth stub, includes an elongated cylindrical portion insertable into the tooth stub and a head portion extending from the surface of the tooth stub for securement within the dental restoration. The head portion of the post is anatomically shaped to conform to the shape of the dental restoration.

Abstract: A dental post for retaining a dental restoration onto a tooth stub and a method for making dental post. The dental post includes a cylindrical body portion and a head portion which extends outwardly from the body portion. The body portion is inserted in a bore in the tooth and secured therein by cement. To improve cement retaining capacity of the dental post, there are provided on the body portion non-continuous raised portions, spaced by wide open gaps to retain large segments of thick segments of cement. The overall portion of the gap area surface is greater than that of the land area surface.

Abstract: A holder for a beaker insertable in a container of an ultrasonic cleaning device for cleaning medical or dental tools, dentures, or the like, in a cleaning solution contained in the beaker. The holder includes a ring-shaped member, which receives the beaker and a supporting U-shaped wire which supports the bottom wall of the beaker and is removably-connectable to the ring-shaped member.

Abstract: A self-threading dental anchor for insertion into a blind channel extending from an excavated surface of a tooth, the channel having a tapered seat portion of predetermined degrees, the dental anchor including an upper retention section to provide retention of a superstructure formed on the tooth, and a lower anchoring section connected thereto for engagement in the tooth channel to threadingly anchor the dental anchor to the tooth, the anchoring section having a helical buttress-type thread thereon. The buttress-type thread has a substantially planar lower surface facing towards a distal insertion end of the anchoring section, and an angled upper surface tapering inwardly towards the upper retention section to provide a crest therebetween, the crest having a knife-like cutting edge. The distal insertion end of the anchoring section is tapered to provide a slope thereon equal to the predetermined degrees of the tapered seat portion of the tooth channel to provide a mating angled configuration therebetween.

Abstract: A container for cleaning dentures, dental or medical instruments, or the like is formed as a plastic bag which is filled with a cleaning solution and immersed together with dentures, instruments, or the like placed therein in a fluid of an ultrasonic cleaning device. The container is provided with an opening receiving the dentures, instruments, or the like and is sealingly closable by a closure such as a slide fastener. A number of such containers may be placed into a tray and immersed into the ultrasonic cleaning device, wherein the bags are subjected to ultrasonic vibrations transmitted to the cleaning solution inside the bags to thereby clean the articles in the bags.

Abstract: A rotary table saw for sectioning dental models having a housing with a base portion and a working table mounted on the base portion. The working table is controllably depressible so as to be moved upward and downward with respect to the base. The motor housed in the base drives a rotary blade oriented in a vertical direction. A slit in the work table permits the blade to emerge therethrough as the work table is depressed. The vacuum outlet is placed in flow communication with the surface of the work table during depression of the work table to remove saw dust from the work table. The dental model is placed on the work table with the blade hidden beneath the work table. The work table is depressed to permit emerging of the rotary blade cutting from the underside of the dental model.

Abstract: A method and apparatus for forming a counterbored channel into the top surface of a tooth root in preparation for receiving a dental post and core during the fabrication of a superstructure on the tooth root. A dental tool is utilized for forming a counterbored recess around the mouth of a pre-drilled central bore. A dental jig having an enlarged flange which snugly fits into the counterbored channel is then used to form ancillary bores to provide a contoured aperture which will receive a correspondingly contoured post. The dental tool is then used to make similar counterbored recesses around the ancillary bores whereby the composite of the counterbored recesses forms a substantial oval channel wherein the core can suitably sit on a level surface perpendicular to the post without the necessity of leveling off the entire upper surface of the tooth root.

Abstract: A dental pin system including an enlongated pin having a plurality of pin sections each of which can be sheared from the next adjacent section by means of a reduced diameter frangible throat portion. The upper end of the pin includes a flattened tang which is securely inserted within an adaptor member. The adaptor member is barrel-shaped with an opposing pair of knobs, diametrically projecting from the midsection of the barrel. The adaptor member can be removably inserted into a pair of receiving slots at the end of a shank. The upper end of the shank is adapted for direct driving by means of a handpiece or hand driver. A plurality of the adaptor members, each color coded to identify their respective pin, can all be mounted on a plate in a prepackaged kit and a single shank can be used to connect to each adaptor member in turn whereby the shank is reused for the adaptors.

Abstract: A probe unit for an electro-surgical device to apply high level frequency voltage to an operating area, the probe unit including an operative end portion provided with a forward cutting tip, and a rear housing connector portion provided with a ferrule rotatably connected to the remaining body portion thereof, a rear end of the operative end portion being threadingly engaged with the ferrule for rotation therewith and for easy removal thereof so that the operative end portion can be sterilized and then re-engaged onto the ferrule of the rear housing connector portion. The operative end portion has an elongated length considerably longer than the rear housing connector portion to prevent cross-contamination of a user and/or patient when the probe unit is being used. The body of the operative end portion is tapered with a rear enlarged portion thereof being provided with laterally extending fins thereabout to provide for uniform curing and a uniform cross-section thereof.

Abstract: Dental restorative compositions comprising a polymerizable poly functional methacylate having the chemical structure: ##STR1## wherein n=1-3, and a filler are disclosed, the binder oligomer and polymer formed are also taught.

Abstract: A dental core and post assembly for use in the formation of a dental core for the restoration of a tooth structure. The dental post assembly includes a support structure for positioning into a prepared tooth root to be restored. At least one leg depends from the support structure for insertion into an ancillary bore predrilled into the root adjacent a central bore predrilled through a canal in the tooth root. An axial aperture through the support structure permits a pin to be adjustably inserted through the axial aperture and into the central bore until it is seated in the central bore. The leg is contiguous with the pin. In one form the invention provides a burnout core and post for the direct technique of forming a post and core system. In another form, the invention provides an impression post for use in connection with the formation of an impression in the indirect technique of forming the core and post system.

Abstract: A rotary table saw for sectioning dental models having a housing with a base portion and a working table mounted on the base portion. The working table is controllably depressible so as to be moved upward and downward with respect to the base. The motor housed in the base drives a rotary blade oriented in a vertical direction. A slit in the work table permits the blade to emerge therethrough as the work table is depressed. The vacuum outlet is placed in flow communication with the surface of the work table during depression of the work table to remove saw dust from the work table. The dental model is first marked and scored on the occlusal surface and then its base is placed on the work table with the blade hidden beneath the work table. The work table is depressed to permit emerging of the rotary blade cutting from the underside of the dental model.

Abstract: A dental pin and bushing assembly for coupling of a removable die portion of a tooth from a working cast. The pin includes an axially extending head portion which can be secured within the die. The coaxial body portion depends from the die portion and includes an offset section for oriented insertion of the pin in the bushing. The bushing is secured in the working cast and includes an elongated sleeve with a mating chamber for receiving the pin. The bushing matingly receives the body portion of the pin so that the removable die can be inserted in only a single oriented direction into the bushing.

Abstract: A dental attachment for connecting a removable dental prosthesis to an adjoining fixed tooth. The attachment includes a female member and a male assembly. The female member is inserted into the fixed tooth and includes an open mouth channel at the forward face of the fixed tooth. The male assembly includes an insert member which is received within a receiving member. The receiving member includes an elongated housing having an upwardly extending face plate through which a chamber is formed into the elongated housing to receive the insert member. The insert member includes an elongated shank portion with an upright plug at its forward end. Rearward of the plug is provided a stabilizing projection. The face plate is sandwiched between the stabilizing projection and the forward plug to provide additional stability. The male member is disposed in the dental prosthesis with the plug portion projecting forward of the face of th eprosthesis. The plug is sidably received within the channel in the female member.

Abstract: A router for performing finishing operations on a dental model having a housing with a base in which a motor is positioned. A storage compartment mounted on the base includes a pivotal cover. The cover forms a horizontal work platform on which the dental model is supported during the operations. The motor extends into the storage compartment and a tool is secured to the shaft for vertical projection above the work platform through a hole in the cover. Apertures in the cover permit dust to fall down into the storage compartment from which a vacuum extracts the dust. A novel method of routing dental models is provided wherein the dental model is placed on a horizontal work surface and finished using a vertically oriented tool.

Abstract: A self-threading dental anchor including a proximal head end providing a manipulating end section for permitting the coupling thereof to a cooperating driving tool, and a threaded anchoring portion extending from the proximal head end. The anchoring portion threads are in the range of 60-100 threads per inch, preferably 84 threads per inch with standard threads and 96 threads per inch with a buttress type thread, to provide for fast insertion with minimum torque. The anchoring portion has an elongated distal pilot end portion in the axial direction approximately equal to the thread pitch of approximately 0.010 to 0.012 inches. A second threaded anchoring portion may be connected to the distal pilot end portion of the first mentioned anchoring portion to provide a frangible reduced thickness portion therebetween, which is readily visible. Preferably, each thread has a height of approximately 0.0020 to 0.0025 inches.

Abstract: A dental pin assembly including an elongated dental pin inserted within a magazine sleeve. The magazine sleeve is removably inserted into the distal end of a shank and locked in place. The shank in turn is driven by a handpiece or manual driver for rotation of the pin. The pin is a composite of a plurality of individual contiguous coaxial pin sections, each pin section having a threaded stem and an enlarged head. Adjacent pin sections are separated by reduced diameter throat portions which are frangible to permit separation of one pin section from the next upon insertion of the one pin section into an aperture in a tooth stub. As one pin section is sheared off upon insertion, the next adjacent pin section is ejected from the adapter to place it in operative position for subsequent insertion into another aperture in the tooth stub. In this manner only one pin section projects at a time and all of the throat portions can be of identical diameter.