Abstract: The stem is tubular, being provided with an axial bore and is frusto-conical. It is provided with an outer thread as well as with a helical groove which provides therefor a resiliency enabling its section to adapt itself perfectly to the section of the root canal in which the pin is screwed.

Abstract: An anchoring device for dental prosthesis applicable to both the reconstruction of deteriorated teeth and as a support for artificial teeth. The anchoring device includes a T-shaped anchoring element having a flattened head or bracket pierced with a hole, and a cylindrical leg provided with parallel grooves. The anchoring element is fixed in a healthy tooth after preparation and drilling. The anchoring element forms an armature or framework for reconstructed tooth material, or provides support for a U-shaped beam made of austenitic steel wire cloth. The U-shaped beam receives artificial teeth thereon to bridge an interdental space. The U-shaped beam is prevented from pivoting by vertically staggering the T-shaped elements.

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 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: The parapulper restorative pin comprises a stem provided with a handle permitting to operate it manually, the dentist rotating this handle by gripping it between his fingers. This handle is provided with four longitudinal grooves constituting holds for four longitudinal fingers provided at the front end of a stem constituting a driving member intended to be connected to a motor driving mechanism, for example a dental engine. The engagement of the fingers with the grooves of the handle not only renders the stem of the driving member angularly rigid with the stem of the pin but, moreover, renders these two elements also rigid axially, owing to the fact that the said engagement is a friction fit, that facilitates the presentation of the pin opposite the hole of the dental root into which it has to be screwed.

Abstract: A stressless pin or post for dental preparation to seat in a predrilled hole or root canal without subjecting the tooth substance to lateral stress. The pin or post has a head, neck and shank and is an elongated member formed by crimping the midpoint of a bar, folding the bar in a predetermined configuration about the rings so that the pin or post consists of side-by-side sections joined only at the top of the head portion.

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.

Abstract: A dentinal retention pin and dental tool for inserting the retention pin into the healthy dentine portion of a tooth. A cylindrical hole with a beveled top is predrilled in the tooth to receive a threaded end portion of the pin such that the threads cut into the dentine to secure the pin. A chamfered stop is positioned above the threaded portion, which seats against the beveled top of the hole to limit penetration of the pin into the tooth. The pin is dimensioned to stop before the threaded portion engages the bottom of the hole. A supra-coronal portion of the pin pertrudes above the stop and provides a surface for securely attaching a reconstructed coronal portion to the tooth. A manipulating section of the pin attaches to the supra-coronal section by a frangible link. The manipulating section comprises a cylindrical extension of the pin having a flat engagement surface in a plane approximately along the diameter of the pin.

Abstract: A contoured dental post for retaining a dental restoration on a prepared tooth stub, the dental post including an elongated cylindrical body portion having peripheral grooves for anchoring the body portion within a cement prepared bore in the tooth stub. A pair of radially projecting ribs angularly extends downwardly along a portion of the length of the body portion on opposite sides of the body portions. The ribs project laterally to approximate the oval shape of the canal in the tooth stub into which the bore is formed, where the ribs taper downwardly to approximate the conical shape of the canal. One rib is longer than the other rib to provide a pilot for inserting the ribs into the bore. A drill jig is also provided for contouring the canal to receive the dental post. The drill jig includes a head block having a depending central shaft extending therefrom for insertion into the bore. At least one offset aperture is laterally positioned in the head block, the aperture having angular side walls.

Abstract: A dental pin having a threaded portion for insertion into a tooth is formed with a shank which has portions inclined relative to the threaded portion and to each other. The threaded portion and shank are of integral construction and the shank is of zig-zag shape.A holder for the pin can take several forms each with a bore for receiving the shank releasably but in driving engagement with the holder.The holder may take a form suitable for use with a dental handpiece or for manual insertion of the pin.The invention also provides a holder with a ratchet mechanism for manual insertion of the pin.

Abstract: A placement assembly which is received in a dental handpiece and is utilized for insertion of a threaded dental pin into a preformed bore in a tooth. The assembly includes an elongated manipulating body portion with the dental pin projecting from an operating end of the body portion. A shank is frangibly coupled to a driving end of the body portion for driving engagement with the dental handpiece to thread the dental pin into the bore. The shank automatically severs from the body portion prior to the final seating of the dental pin in the bore. The body portion is utilized as a hand tool for the final seating of the dental pin in the bore. The body portion is then disengaged from the dental pin to leave the dental pin properly seated in the bore.

Abstract: A method and apparatus is disclosed for use by dental practitioners to enable the restoration of decayed or damaged teeth. The method comprises preparing the tooth for installation of the disclosed apparatus, which will be referred to herein as a pillar cusp, by removing decay, old restorations and damaged tooth structure, and then preparing a horizontally disposed, flat circular area or niche on the dentin for each cusp to be restored. The flat circular area should be approximately centered on an axis located through that of the removed cusp. A vertically disposed channel is then drilled at the center of the niche and a self-threading dental anchoring device or screw is inserted into the channel. The pillar cusp, which, in effect, is an artificial or man-made dentin, is then threaded onto the screw.

Abstract: A bonding dental pin for aiding in the retention of a thin layer of bonding material onto a tooth structure, the bonding dental pin including a lower anchoring portion for securement into the tooth structure. A coaxial cylindrical neck portion of the pin is embedded into the bonding material, and an upper manipulating portion of the pin is available for securing the anchoring portion into the tooth structure. A first stop flange is interposed between the anchoring and neck portions, and a second head portion flange is interposed between the neck and manipulating portions. The confronting surfaces of the flanges are respectively concave to define a pocket therebetween for aiding in maintaining the bonding material around the neck portion.

Abstract: A contoured dental post for retaining a dental restoration onto a prepared tooth stub, the dental post includes an elongated cylindrical body portion having peripheral grooves for anchoring the body portion within a cement prepared bore in the tooth stub. A pair of radially projecting ribs extends on opposite sides of the body portion, along at least a portion of the length of the body portion. The ribs suitably fit the approximate oval shape of the canal in the tooth stub into which the bore is formed. Preferably, one rib is longer than the other rib. A drill jig is also provided for contouring the canal to receive the dental post. The drill jig includes a stepped head block having a depending shaft extending therefrom for insertion into the bore. A pair of offset apertures is laterally positioned on either side of the shaft and extend through respective stepped portions of the head block and into a portion of the shaft.

Abstract: A magazine containing a plurality of retention pins for treating broken and undermined teeth which comprises a handle with a head fixed thereto at an obtuse angle. The handle is provided with a device for advancing a bar consisting of a series of retention pins separated by pre-determined breaking point, formed as portion of reduced thickness between pins. The head is provided with a triangularly formed spring for retaining the bar by capturing the portion of reduced thickness between pins. The pins are preferably longitudinally ribbed. The magazine, which acts also as handling tool, facilitates the storage and insertion of retention pins. By providing a plurality of pins in the form of a bar, waste is eliminated.

Abstract: A dental restorative pin is provided in three sequential sections, the first intended to penetrate into and to engage in a dentinal pin-hole having a hemispherical indentation surrounding its opening, a second section having a sealing surface curved on a hemispherical locus for mating with the hemispherical indentation when the first section penetrates into said pin-hole, to seal the opening, and to limit penetration of the first section into the pinhole, and the third section extending supragingivally from the second and being embeddable in a surrounding body of restorative material. Means is provided to form an annular open zone surrounding the junction of the first and second sections when the first section is engaged in the pin-hole and the sealing surface of the second section is mated to the hemispherical indentation.

Abstract: A dental anchoring device including a stud, one end of which has a left hand external screw thread and the other end of which has a right hand external screw thread.

Abstract: An axially extending screw pin to be screwed into a tooth has a threaded part and an engagement part with a slot in one end. The slot extends in the axial direction of the pin toward the threaded part with the axially extending surfaces of the slot converging inwardly toward its base which has a concave, semi-circular surface. The converging sides are convex surfaces defining a quarter arc of a circle. A driven member with an engagement projection at one end shaped complementary to the slot, is disengageably connectible with the screw pin. A gripping member is axially displaceable positioned on the engagement projection end of the driven member. The gripping member is freely rotatable relative to the driven member and has resilient gripping tongues for holding a screw pin relative to the driven member. The driven member is mounted in a drive member so that is can be rotated about its axis.

Abstract: A novel placement device used for temporarily holding flexible splinting material against tooth surfaces while bonding same to the teeth during a dental splinting procedure, and novel methods for carrying out the splinting procedures using monofilaments for drawing the splinting material into interproximal spaces. The monofilaments are also useful for bonding bridges or retainers to teeth. The splinting material can also be bonded over the tooth's biting surface.

Abstract: A dental tool for wire wrapping a portion of a dental anchor projecting from dentition, the dental tool including an elongated rod with a cylindrical receiving chamber axially extending into the rod from a forward end thereof for receiving the projecting dental anchor therein. An elongated passageway extends through the rod offset from the chamber for receiving a supply of wire therethrough. A manipulating device is coupled to the rear end of the rod for rotation of the tool to thereby helically wrap the wire about the anchor for reinforcing the anchor. The wire can be extended from one dental anchor to an adjacent dental anchor to thereby splint the anchors together.

Abstract: An improved unitary bulk restoring dental post having a stem of substantially parallel threaded sides divided along its length into separate legs for threaded insertion into a tooth root canal by a wrench that applies a predetermined torque to the dental post to thread it into the tooth root for crown restoration.

Abstract: A dental pinning device comprises a shank having at one end a formation for engagement with a latching-type dental handpiece and carrying at the other end, by way of a shearing neck, a threaded pin for screwing into a tooth, wherein the threaded pin is part of a metal end-piece which also includes an integral shaft of smaller diameter projecting from the pin and the shank and shearing neck are formed as a body of synthetic resin material and are attached to the end piece by moulding of the synthetic resin material around the shaft.

Abstract: A dental post for retaining a dental restoration in a secured position on a prepared tooth stub, the dental post including a cylindrical elongated pin having a plurality of spaced apart, individual, external helical flutes longitudinally disposed about the longitudinal axis of the pin. The pin is insertable within a bore provided in the tooth stub with a portion of the pin extending upwardly from the stub to secure the restoration thereon. The flutes functions to, both retain the pin secured within the cement prepared bore, and also provides a vent for the insertion of the pin into the bore.

Abstract: The present invention relates shortly to a driving tool for screwing rods into teeth. This tool includes a stem (2) having an attachment means (3) for a rod in one end thereof and an operating portion (4, 9) in the other end thereof. The operating portion includes a removable sleeve (9) which surrounds the operating portion end (4) of the stem (2) and which is limitedly movable in the longitudinal direction of the stem (2). The operating portion end is preferably constituted by a cylindrical head (4) having circular cross-section and slightly greater diameter than the stem. On the operating portion end or the head (4) there are engagement means (5) and within the sleeve (9) there are cooperating engagement means (11) which engagement means (5, 11) are brought into and out of engagement respectively by the movement of the sleeve (9) between its limiting positions.

Abstract: Dental anchoring means of the kind including a threaded pin which is located in a hole in a tooth.Before insertion into the hole, the pin is integral with a shank through a neck which allows the pin to break off from the shank after insertion.The pin and shank are located in a longitudinal open-ended bore in a connecting member which is arranged to be secured in a dental handpiece.The pin and shank are fixed in the bore by forming an enlarged head on the shank which is a force fit in the bore. This locks the pin and shank securely in the bore during use and the connecting member can be of different material from the shank and pin.

Abstract: A dental anchor for securing a superstructure to a tooth understructure, the dental anchor having a forward elongated anchoring portion for insertion into a channel extending into the tooth understructure. A coaxial, elongated retaining portion extends from the anchoring portion and has a non-circular cross sectional configuration to provide displacement resistant properties for retaining the superstructure. A depth-limiting portion is integrally disposed between the anchoring portion and the retaining portion for limiting the depth of insertion of the anchoring portion into the channel. The depth-limiting portion has a frustro-conical section which sits into a countersink formed at the upper end of the channel in the tooth understructure. A dental tool is provided to form a limited depth channel simultaneously with a countersink in the tooth understructure for use in conjunction with the dental anchor.

Abstract: A self-tapping surgical pin which is capable of plastic deformation at ambient temperature is formed of vacuum-annealed orthopaedic stainless steel.

Abstract: An overhandle for enclosing the handle or the shank of a tool, such as a dental tool. The overhandle is formed of two mating semi-cylindrical sections having respective forward end faces which are confrontingly opposed in the opened condition and are in a single plane in the assembled closed condition. Laterally spaced apart hinges interlock the sections at their forward end faces. An elongated channel is respectively formed in each of the sections and extends through the forward end face of the respective section. The channels matingly confront in the assembled closed condition to define an internal chamber with an open forward end so that the chamber receives the end of the tool with the remaining tool portion axially extending through the open forward end. A coupling mechanism is provided for retaining the sections in the assembled closed condition. In modified embodiments, the same overhandle can enclose either the handle of one tool or the shank of another tool.

Abstract: A novel hand tool for dental use for dispensing wire, pins or rod and for manipulating the dispensed material in a dental procedure. In a preferred embodiment, the dispensed material is a strip of notched pins for cementing to tooth dentin in a retentive pin procedure.

Abstract: Dental anchoring means includes a cylindrical shank having a turned over portion at one end and an integral threaded pin at the other end which is detachable from the shank.The anchoring means locates in holding means in the form of a sleeve with a longitudinal opening. The shank extends through the opening and is held for rotation with the sleeve by a stop member at one end of the sleeve which engages the turned over portion.The sleeve is located as a gear wheel in a dental handpiece which may be a self-contained unit.

Abstract: A combined dental drill and anchor pin for use in the field of denistry. Restoration techniques, involving the use of anchor pins for the retention and reinforcing of dental support structures as well as for various mechanical appliances used in the field of orthodontics, are facilitated by combining the drill and anchor pin in a single structure thereby eliminating separate drilling and pin insertion steps.

Abstract: A lingual dental splinting device having an elongated bar-like body member with at least two tubular members extending perpendicularly from one side thereof, the tubular members being received in corresponding holes which respectively extend transversely through adjacent teeth when the body member is disposed in a side wall channel laterally extending between the adjacent teeth, the tubular members including axial openings therethrough. A brace member is disposed in an opposing side wall channel which also laterally extends between the adjacent teeth. A U-shaped wire has its legs passing through or extending from the brace member. The legs extend from the opposing side wall through the axial openings in the tubular members so as to extend from the bar-like body member. Restraining devices are then disposed at the distal ends of the legs so as to hold the body member in place.

Abstract: A dental anchor is disclosed comprising an elongated body member for insertion into a channel in a tooth in order to anchor a superstructure to the tooth. The body member has at least one section with a substantially oval cross-sectional configuration having a major axis and a minor axis. The at least one section is provided with self tapping threads for threading into the channel. The threads have a root diameter less than the minor axis dimension of the oval configuration and a crest diameter at least equal to the major dimension of the oval configuration. Preferably, the body member includes two similar sections joined together by a reduced thickness portion so that one section can be bent relative to the other section when seated in the channel to provide an anchoring portion for the superstructure.

Abstract: A dental anchor is disclosed comprising an elongated body member for insertion into a channel in a tooth in order to anchor a superstructure to the tooth. The body member has at least one section with a substantially square cross-sectional configuration. The at least one section is provided with self tapping threads for threading into the channel. The threads have a root diameter approximately equal to the width of the square configuration, and a crest diameter less than the diagonal dimension of the square configuration. Preferably, the body member includes two similar sections joined together by a reduced thickness portion so that one section can be bent relative to the outer section when seated in the channel to provide an anchoring portion for the superstructure. Two dental anchors may be joined together by a reduced thickness frangible member, where the thickness of the reduced thickness portion of each dental anchor has a thickness greater than any thickness of the frangible member.

Abstract: A stainless steel wire bonded with a number of short filaments or staple fibers which are electrostatically bonded to the wire, said filaments being engaged in a jerry material which is applied over a decayed tooth for taking an impression thereof, when the wire is embeded into said jerry material for the reinforcement thereof.

Abstract: A dental anchor is disclosed comprising an elongated body member for insertion into a channel in a tooth in order to anchor a superstructure to the tooth. The body member has at least one section with a substantially square cross-section. The longitudinal corner portions of the section are provided with self tapping threads for threading into the channel. Preferably, the body member includes two similar sections joined together by a reduced thickness portion so that one section can be bent relative to the other section when seated in the channel to provide an anchoring portion for the superstructure. Two dental anchors may be joined together by a reduced thickness frangible member, where the thickness of the reduced thickness portion of each dental anchor has a thickness greater than any thickness of the frangible member.

Abstract: A flexible dental retaining splint which is disposable in a channel extending between adjacent teeth, the retaining splint being formed of a wire core with a wire coil being wound about the core with the turns of the coil being in a juxtaposition. Wire loops are formed at both ends of the wound core. The splint can also be formed with several sections of wire cores each surrounded by a wire coil and having a wire loop connecting adjacent sections. The loops function to anchor or secure the splint in the channel, either by the inlay material or pins passing through the openings provided by loops.

Abstract: A method and apparatus for connecting an artificial tooth portion to a dentin portion utilizing an elongated member having a generally circular cross sectional shape on one end portion thereof and barbs, each having a base portion and a free end attached to and disposed around the periphery of the one end portion thereof for directly engaging the dentin portion within the bore. The barbs are oriented such that the free end is spaced around the periphery in one direction from the base portion.

Abstract: The present invention relates to a device for the stabilization of teeth, in particular molar teeth having a cavity which comprises a screw provided with an outer thread and means at its outer end for holding it and a hollow nut provided with an inner thread adapted to the outer thread of the screw and means at the outer end of the nut for holding it. The present invention also relates to a method for the treatment of a tooth having a cavity with the aid of said device.

Abstract: A twist-lock pin for improving the retention and resistance characteristics of plastic dental restorative materials and a drill for drilling a tapered hole into sound tooth structure whereupon the geometrically similar but oversized left-hand threaded pin is inserted. Slight rotation of the pin in a counter-clockwise manner causes the threads to bite simultaneously, effectively locking it into place. Plastic restorative materials including dental amalgam, composites, silicates, resins and gold foil may be inserted against the threaded protruding portion of the pin to enhance the retention and resistance characteristics.

Abstract: Parapulpal dental restorative pins for use with all forms of dental restorative materials, including impression-taking materials, modeling waxes and the like, as well as amalgams, gold and other materials used for constructing a superstructure on a natural tooth, have heads to anchor the pins in such materials, and means on the head to prevent the head from rotating around the longitudinal axis of the pin in the restorative material. A constricted neck between the head and the principal body of the pin allows the head to be oriented into a plane that is not perpendicular to the pin axis. The heads can take various shapes and configurations. A composite pin, having a principal body made of one material and a head made of another is shown.

Abstract: A dental retaining splint is disclosed including a bar-like body member having preferably two tubular members extending perpendicularly therefrom, where the tubular members have axial openings extending therethrough. The body member has an H-shaped configuration with the front and rear walls being serpentined to define sections therein. These sections can be removed, such as by cutting, to provide a shorter splint. In use, the splint is first temporarily held in a channel formed in adjacent teeth, where the tubular members function as guides for a drill to form pilot holes in the teeth. The splint is then removed, and the pilot holes function as lead holes for the formation of enlarged bores to receive the tubular members therein for retaining the adjacent teeth in a fixed position. The splint is then replaced so that the tubular members are disposed in the bores formed therefor. An inlay fills in the channel and covers the splint in the final procedure step.

Abstract: A method and apparatus for connecting an artificial tooth portion to a dentin portion utilizing an elongated member having a generally circular cross sectional shape one one end portion thereof and barbs attached to and disposed around the periphery of the one end portion thereof for directly engaging the dentin portion within the bore.

Abstract: A twist-lock pin for improving the retention and resistance characteristics of plastic dental restorative materials and a wrench for providing positive control over the pin during insertion into the opening in the tooth. The pin is partially screwed counter-clockwise into a left-hand threaded metal cylinder, the wrench body. After two revolutions, the pin bottoms out against a flat ended, right-hand limiting screw which is inserted clockwise from the opposite end of the wrench body and which is limited by two lands, one a flat area in the wall of the wrench body and the other at the end of the wrench body. After the wrench has been utilized to insert the pin into the tooth structure, it is removed by relieving the pressure on the pin and unscrewing the wrench from the pin.

Abstract: A dentine pin has a screw-threaded portion intended to break off and remain in the dentine, a shank, and a latch portion for engagement by the latch of a dental handpiece. The shank is tapered or otherwise reduced in diameter to allow oscillation of the shank in the driving sleeve of the handpiece, thereby producing a self-aligning action.

Abstract: A plastic shank holding a metal dental anchor therein is disclosed, wherein the dental anchor is for anchoring a superstructure to a tooth. The dental anchor includes at least one threaded section and one manipulating end section joined together by a frangible portion so that the sections can be severed. The shank includes an opening for receiving the manipulating end section of the dental anchor in a force-fit connection therebetween, where the manipulating end section includes torque transferring wing portions for permitting the shank to pivot relative to the dental anchor when the dental anchor is being threaded into a channel in a tooth. A plastic hand driver is provided for receiving the shank therein, where the hand driver includes an abutment portion for rotating the shank, and projections for providing a snapped-in connection between the shank and the hand driver to permit a pivotal relationship therebetween while releasably retaining the shank within the hand driver.

Abstract: A dental reinforcing pin including a threaded portion, for self-tapping insertion in a bore formed in a tooth understructure, and a connecting portion formed integrally with the threaded portion. The connecting portion includes a shank, adapted for engagement in a dental handpiece, and a weakened portion intermediate the threaded portion and the connecting portion to permit shearing and separation of the connecting portion from the threaded portion when the pin is inserted to the depth of the bore.

Abstract: A dental retention pin has a threaded longitudinally grooved lower shaft section, an intermediate sealing section for sealing the hole in which the pin is threaded, and an upper section embeddable in a surrounding body of restorative material. A pinhole is drilled in a tooth and the pin is inserted therein by rotation to cut threads in the dentin as fluids are vented through the groove. The sealing section then enters the pinhole to establish a sealing relationship therewith.