Abstract: A flexible rope-like root canal prosthesis and method of use are provided for repair of a damaged tooth. The flexible rope-like root canal prosthesis is contacted with a stiffening agent to form a composite that is moldable to conform the interior of the root canal. The stiffened rope-like root canal prosthesis is bonded into the root canal and serves as a foundation for restoring the pulp cavity core and allowing for additional prosthesis to be applied to the tooth.

Abstract: Method and apparatus for removably mounting a dental appliance in a mouth. An abutment member has a tapered support surface which extends away from the affixation area of the abutment. The tapered support surface is formed to be received in and mate with a complementary surface formed in an appliance to provide co-acting support surfaces for the appliance, so that the appliance need not depend upon gum tissue for support thereby enabling design of an appliance to fully conceal the area of affixation for esthetic appearance while providing the look of natural teeth. First and second coupling devices are adapted to be respectively secured to the abutment member and the appliance for removably retaining an appliance on the abutment member.

Abstract: A method of installing a dental post and core system having a flexible post.

Abstract: A kit, a tool, and a method of use for securely retaining a dental restoration on a prepared tooth stub having a top surface and a bore extending therein. The kit comprises plural dental posts of varying sizes and a tool. Each dental post includes an enlarged head and a shank. The shank is an elongated member having a first longitudinal axis arranged to be fixedly secured within the stub's bore so that the post's enlarged head extends beyond the stub's top surface. The enlarged head has plural through passageways, e.g., a coronal passageway, and a transverse passageway that communicate with one another for receipt of a setable securement medium which flows therein and about the surface of the head to secure the dental restoration to the post. The tool includes a handle portion and an opposed pair of free end tips.

Abstract: A dental post having a support frame captured and interlocked thereon, and encaptured in a luting material, preferably such as a moldable self-curing tooth-colored composite material to create a laminated composite/metal foundation complex for retaining a dental rstoration securely on a tooth stub. The post includes a smooth cone-shape lower end portion for matchingly fitting into a prepared tooth canal, a threaded portion passively fitting in the tooth canal for engagement with the composite material, an unthreaded portion to provide greater strength, a square portion to permit the dental post to be unscrewed from the hardened composite material, a tapered portion, and a chisel-like portion at the upper end of the dental post.

Abstract: A dental post for securely retaining a dental restoration on a prepared tooth stub having a top surface and a bore extending therein. The dental post comprises a bulbous head and a shank. The shank is an elongated rod-like member having a first longitudinal axis, with the outside diameter of the shank measured along a second axis perpendicular to the first axis and being a predetermined dimension. The shank is arranged to be fixedly secured within the bore so that the bulbous head extends beyond the top surface of the prepared tooth stub. The bulbous head has an outside diameter measured along a third axis parallel to the second axis and is a predetermined dimension. The bulbous head has plural through passageways, e.g., a coronal passageway, and a transverse passageway that communicate with one another. The plural through passageways are for receipt of a setable securement medium which flows therein and about the surface of the head to secure the dental restoration to the post.

Abstract: A combined storage container and installation device for a dental post having an elongated distal end and a proximal head. The device includes an elongated container having a top opening, a cap has a recess therein to hold the proximal head in the recess while allowing fluid to pass into and through the recess. The cap is received and held in the open top of the container. By holding and manipulating the cap, the dental post may be removed from the container and installed under sterilized conditions.

Abstract: A dental post is provided comprising a top section and a stem with a slot which extends lengthwise through the stem to form a plurality of legs. The legs have wings attached thereto which fit into indentations in a wall of a tooth bore. Kits are provided comprising the dental post and burs for forming a tooth bore to accommodate the dental post and optionally a core for supporting a tooth crown, a template for forming holes in a tooth stub and a key for providing support for the core.

Abstract: A method and system for preparing a cast post and core in a dental root canal procedure is provided. The method comprises the steps of removing the root canal material from the tooth; cutting out a post-hole in the tooth having a substantially uniform width; cutting out at least one annular tier along the hole; placing a burn-out post having at least one flange into the post-hole so that the flange is seated on the annular tier; applying an acrylic resin onto the tooth and over the burn-out post in order to form a core, and finally removing the core with the burn-out post from the tooth in order to form a casting.

Abstract: A dental post is provided comprising a bottom section and a stem with a slot which extends lengthwise through the stem to form a plurality of legs. The legs have wings attached thereto. The wings have cutting surfaces which are used to form indentations in a wall of a tooth bore. Kits are provided comprising the dental post and burs for forming a tooth bore to accomodate the dental post and optionally a core for supporting a tooth crown, a template for forming holes in a tooth and a key for providing support for the core.

Abstract: A dental post is provided including a stem and a flange secured to an intermediate vertical position on said stem to delineate a top stem section and a bottom stem section. A support can be positioned to connect the flange with the top stem section. The flange can be provided with through holes or pins formed integrally therewith.

Abstract: A crown-root reconstitution system and method of manufacturing a physiological dental securing peg in which a crown reconstituting material (3) is placed between a peg (1) and sound dentine walls (2a). The peg is formed of a composite material and includes high strength fibers (5) embedded parallel to one another, elongated in its axial direction, continuous from one end to the other end thereof. An epoxy resin matrix is formed, and a transverse modulus of elasticity of the order of magnitude of the average of that of the dentine in the amount of 18 GPa and a longitudinal compression-tensile strength and shear strength greater than corresponding average values for the dentine is provided by tensioning all of the fibers equally and pre-stressing all of the fibers in traction.

Abstract: There is provided a procedure to maintain an otherwise whole tooth, from which the nerve has been removed by carrying out a procedure which includes inserting a thin flexible post, preferably formed of a light-transmitting, physiologically inert material, to the full depth of a prepared relatively narrow tooth nerve canal, which has previously been sealed at its bottom with gutta percha. The post is permitted to abut against the gutta percha. The post is then surrounded by a film of a composite-filler or sealant, which is preferably light-curable, coating the post while supporting and sealing the walls of the canal. The post is sufficiently flexible as to be able to follow the curvature of the canal, which may retain a slight natural curvature. The composite filler or sealant is then cured, preferably by an optical radiation carried through the preferably transparent post. In one embodiment the light-curing post is removable after the sealant has been at least partially cured.

Abstract: The present invention relates to a method for retaining a passive post and reinforcing endodontically treated teeth by coating a passive metal post with silicone and then with a resin coating, forming a post canal in a cavity, irrigating the post canal with a solution of Ethylene Diamine Tetracetic Acid, irrigating the post canal with Sodium Hypochloride, evacuating the post canal with a high vacuum suction tip, mixing and adding a cement comprising Bis-GMA and TEGDMA to the post canal, distributing the cement with a Lentulo spiral, inserting the silicoated metal post into the post canal, and holding the metal post under pressure until the cement sets. The invention also relates to vacuum apparatus for evacuating a post channel and dentinal tubules of moisture and to create an empty intertubular zone. The vacuum apparatus includes a vacuum suction tip having an outer diameter less than the inner diameter of the post channel and a high vacuum source connected to the vacuum tip.

Abstract: A dental post is provided comprising a bottom section with cutting projections and a stem section. The cutting projections cut paths into the root canal walls to provide retention and anti rotation. A disk may be included which has projections on the bottom which cut pathways into the top of the root for optimal post support and root fracture resistance.

Abstract: A superstructure for an artificial tooth is formed of a a root post which is screwed into a root canal of a tooth stump. The root post includes a cylindrical tap having a cutting thread, and is capable of guiding a sleeve-shaped rose cutter having a curved cutting surface to produce a tooth recess with a lower curved portion. The tooth recess is concentric with respect to the root post. A sleeve-shaped crown anchor is concentrically secured to the root post and has a lower curved portion which fits into and corresponds with the lower curved portion of the recess. The artificial tooth is secured on the crown anchor.

Abstract: A dental post is provided comprising a bottom section and a stem with a slot which extends lengthwise through the stem to form a plurality of legs. The legs have wings attached thereto which fit into indentations in a wall of a tooth bore. Kits are provided comprising the dental post and burs for forming a tooth bore to accommodate the dental post and optionally a core for supporting a tooth crown, a template for forming holes in a tooth and a key for providing support for the core.

Abstract: A method and apparatus for removing dental posts by inserting and rotating an extraction drill. It is particularly useful for hollow dental posts having left-handed helical grooves on the post's external surface.

Abstract: A retentive dental pin comprising in sequence a lower portion which can be secured within the dentine of a tooth, and a head portion to which a tooth restoration may be secured, a detachable connection, and a fixing portion attached to the head portion by the detachable connection, characterised in that the head portion is connected to the lower portion by dentine-engaging structure comprising an inwardly and downwardly extending surface carrying grooves shaped to screw into the dentine.

Abstract: An improved dental post formed of a unitary, elongated metal post having a proximal portion and a distal portion, the distal portion being configured to be received in a prepared drill hole in a tooth, the proximal portion being configured to extend externally of a tooth to receive a dental device, such as a crown, thereon, the proximal portion having a porous surface to which dental device materials securely adhere, the porous surface preferably having interconnected interstices. In one embodiment the post distal portion is irregularly configured to thereby accept a crown having a highly contoured configuration.

Abstract: A supporting mechanical connecting element of metal or the like high-strength material, preferably for the medical and dental field, is formed so that the connecting element and/or the receiving element is coated with a hydrolysis-stable bond-assisting layer undergoing a hydrolysis-stable chemical or physical-chemical bond with the material of the receiving element. In order to improve the mechanical retention the connecting element being used for anchoring has a cylindrical shaft, a circular portion conically tapering towards the free end and a circular, in cross section U-shaped recess extending from the free end inwardly, whereby this form is chosen so that it results in a tension reduction.

Abstract: A tooth dowel 10 has a shaft 11 and a coronal restoration frame or head 12 enlarged to provide support for substantially all parts of a total restoration and so constructed as to be relatively readily reducible to fit a restoration of a tooth requiring only a partial restoration. The head includes segmental finger elements 14 adapted to be removed to reduce the size of the head, e.g. by a small disc cutting wheel or pair of snips. A damaged tooth can be rebuilt by (a) obturating (stopping) the root canal, (b) enlarging the coronal portion of the canal, (c) reducing the segments of this tooth dowel appropriately, (d) fixing the so reduced dowel in the canal, and either (e) immediately reducing any remaining coronal tooth structure and fixing a crown on the so reduced tooth and dowel head, or (e1) fabricating a restoration on the dowel head and any remaining tooth structure (FIGS. 2A, 2B), and optionally (e2) reducing the restoration to a core (FIGS. 3A, 3B) and fixing a crown thereon at a later date.

Abstract: A dental tool is disclosed having a hollow cylindrical body portion, with an enlarged angular ring at one end, said ring having an abrasive coating thereon.

Abstract: A method of installing a dental bridge in the mouth of a person who has lost several natural teeth leaving a space between his existing natural teeth with a viable root structure in the space. The method includes installing an implant adjacent each of the natural teeth, installing a post in the viable root structure and supporting the dental bridge on the post and on the two spaced implants, thereby using the viable root structure as a partial support for the bridge.

Abstract: A method of accurately positioning a post in a tooth root to receive a tooth crown is proposed wherein a stepped bore having successive sections is formed in the tooth root in accurate axial alignment one with the other by locating a jig in a first bore part and utilizing that jig in the precision drilling of the second bore part.

Abstract: The anchorage equipment for an artificial tooth comprises a cap made of a gold alloy which is adapted to be stuck onto the head of the root canal anchorage post. The porcelain build-up can be applied to this cap directly by molding. The head of the root canal anchorage post comprises a pin haaving a laterally flattened portion, and the plug-on cap has a corresponding bore provided with a flattened portion for the purpose of mutual alignment. The equipment further includes a transfer cap and a transfer pin having the same alignment feature as the above-mentioned pin and cap. For the production of an artificial tooth, first an impression is taken with the transfer cap plugged on, then a gypsum impression is prepared with the transfer pin inserted into the transfer cap, whereupon the dental technician can proceed to stick the cap onto the projecting transfer pin in order to form the porcelain crown directly on the cap.

Abstract: A devitalized tooth having an outer surface at which opens a longitudinally extending and empty pulp cavity into which open transverse tubules is rebuilt by a prosthesis comprising a peg engaged with spacing in the cavity and having an outer end projecting from the cavity past the outer surface of the tooth, a prosthesis body adhered to the outer end of the peg, and a generally conical flexible and porous sheath formed of high-strength filaments surrounding the peg in the cavity. A solid mass formed of a durable resin that has a very low surface tension when liquid fills the cavity around the peg and the tubules. The sheath is wholly imbedded in the cavity in the mass.

Abstract: A dental post for securely retaining a dental restoration in a prepared tooth stub. The dental post is formed of an elongated cylindrical rod having an active threaded portion and a passive portion. The dental post is threadedly engaged with a sleeve secured in the tooth stub, which sleeve has at least an active threaded portion.

Abstract: A plug and method of its use are disclosed for forming a removable closure in openings of dental appliances or other physiological appliances, the plug including an elongated shaft portion having a diameter mating with the opening, and an inner or gingival end of the plug which is enlarged by up to about 5%, more preferably about 1-5% and most preferably about 1-2% relative to the elongated shaft portion, the enlarged gingival plug end being an annulus having a radial thickness of up to about 20% and more preferably about 11% of the diameter of the enlarged plug end, the enlarged plug and the thickness of the annulus being selected together with the shaft material, preferably a resilient elastomer, to produce a cork type or press-fit engagement of the enlarged plug end in the appliance opening to retain the plug firmly in place.

Abstract: The coupling device comprises a substantially spherical male element, rigidly associated with a support member, in turn adapted to be rigidly associated with the fixed part of a dental prosthesis. The device further comprises a female element defined by a prefabricated cap having an outwardly open seat. The cap is adapted to be rigidly associated with the removable part of a dental prosthesis, and the spherical male element is engageable, in snap-together engagement relationship, with the outwardly open seat, for associating the removable part of the prosthesis with the fixed part thereof.

Abstract: An endodontic post construction is provided for anchoring a tooth restoration to a portion of a human tooth. At least first and second endodontic posts having first and second complementary surfaces are fitted together so that the posts together provide a generally non-circular cross-sectional shape which is resistive to rotation within a root canal of the tooth.

Abstract: In dental technology, in order to match root posts to curved root canals, the fixation part consists of a material with mechanical properties, such as ductility and flexural rigidity, that permit topical matching of the fixation part to the curved root canal. For example, the ductility increases from the oral side of the fixation part to the root apex.

Abstract: Dental cements and abrasives are provided which are polymerizable with visible light. Such adhesives may be applied in thinner films than heretofore possible and demonstrate superior physical properties. Processes employing such materials are disclosed wherein the polymerization of the adhesive is accomplished by transmitting visible light through tooth or other structures to effect the adhesion.

Abstract: A dental product and method utilizing a translucent construct as the post or post-and-core of a dental restoration. In normal tooth structure, the prismatic and refractive enamel carries light into the dentin and root, transilluminating the gingiva and contributing to its pink color. The use of a translucent post or post-and-core structures preserves this normal transillumination and minimizes or eliminates gingival discoloration adjacent a dental restoration.

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: In a dental post and coping combination in which the coping is a tubular envelope open at one end, a shoulder around the base of the post which has an annular surface on the locus of a first curvilinear surface, and an annular meeting surface around the open end of the coping which is on the locus of a second shallower curvilinear surface cone, so that when the two parts are assembled the two surfaces meet on the locus of a circle that coincides with the larger periphery of at least one of the two surfaces.

Abstract: The invention relates to a stomatological implant in the form of selectively coated root canal pins, short pins, transfixion pins, replantation pins, of titanium, tantalum, niobium, zirconium and/or their alloys. The stomatological implant is used for long-term bacteria-proof closure of the root canal. Pursuant to the invention, up to three zones may be selectively put on the implant, meeting a variety of biological requirements.

Abstract: Dental cements and adhesives are provided which are polymerizable with visible light. Such adhesives may be applied in thinner films than heretofore possible and demonstrate superior physical properties. Processes employing such materials are disclosed wherein the polymerization of the adhesive is accomplished by transmitting visible light through tooth or other structures to effect the adhesion.

Abstract: In an assembly constituted by a drill and a tenon for anchoring a dental prosthesis adapted to be fixed in the root of a tooth the drill has a diameter slightly larger than that of the tenon at all points along its length. The tenon and the drill have similar meridian profiles and each is constituted by two coaxial cylindro-conical parts of large and small diameters respectively, the cylindro-conical part of small diameter comprising a cylindrical part connected to the small base of the conical frustum of the cylindro-conical part of large diameter projecting out of the root of the tooth. The tenon and the drill terminate respectively in their truncated end part of small diameter, of which the angle of taper is selected so as to ensure a wedging of the truncated end part of small diameter of the tenon in the corresponding truncated end part of the drilled hole. Futher the truncated end part of the tenon as a length shorter than that of the drill.

Abstract: A dental retention pin preferably made of metal is provided with a closed, cylindrical coating of bond assisting material, and an additional layer of a plastics filling material in order to obtain a physical-chemical or a purely chemical bond between the retention pin and the filling structure for obtaining a substantially increased retention power compared with known metal pins, which merely result in a mechanical or mechanical-physical joint to the filling structure. The retention force will be increased by shrinking the bond assisting layer or the outermost plastics layer onto said bond assisting layer around the pin so that the layer spans itself around the pin in a ring-like manner. Furthermore, examples for the structure of a retention pin are described, which improve the handling and insertion of such retention pins by the dentist considerably.

Abstract: Organic esters of chlorine-containing or bromine-containing phosphorus acids and BIS-GMA, as well as organic esters of phosphorus acids having chlorine or bromine bonded directly to phosphorus, the organic radical of said esters containing at least one polymerizable functional group. Also described are dental liner, restorative, composite, and adhesive compositions containing such organic esters, as well as methods for using such compositions to repair or veneer dental tissue.

Abstract: 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.

Abstract: An endodontic post made of metal base has as its surface layer, an implantation of ions of a dissimilar metal, or a gas. The ion-implanted layer may be co-extensive with the entire subjacent endodontic post, or may cover selected areas for variegated functionality. Long-term secondary decay is delayed, by this endodontic post.

Abstract: There is provided a method of bonding orthondontic brackets to teeth with an adhesive comprised of a mixture of an aromatic or hydroaromatic and aliphatic methacrylate or acrylate, an alpha, .beta.-diketone and a tertiary amine and, optionally, organic or inorganic fillers, polymerization stabilizers and other additives, such adhesive being cured by a light source having white-light output of no less than 25,000 foot candles. The light is applied to the occlusal surface of the tooth or the side opposite to the side on which the bracket is placed. Thus the adhesive is irradiated indirectly.

Abstract: There are applied gold containing preparations as intermediate layers for facing fired on alloys with ceramic compositions in the dental art. These gold preparations should improve the adhesiveness, form a structured surface and make possible a saving in the consumption of gold. This is accomplished with preparations that contain 60 to 95% gold powder, at least 50% of which are platelet shaped particles, 5-40% of a binder and in a given case up to 20 of a powder as an adhesive which is made of metals and/or non-metals.

Abstract: Apparatus and method for applying a core and crown to a tooth having a cleaned-out root canal, including a threaded post having a nut threaded on and positioned therealong.

Abstract: An endodontic implant for insertion into the jawbone of a patient through a bore formed in a tooth to stabilize the tooth. The implant comprises an elongated post having sides tapering inward from a larger diameter first end to a smaller diameter second end. A plurality of external threads are formed on the post and extend along the length of the post from the first and second ends for a predetermined distance. An intermediate, tapered, smooth-sided section is formed on the post between the first and second threaded portions.

Abstract: A dowel pin is mainly made of the hard plastics and is substantially composed of a head to be implanted in the tooth model (primary plaster) and a pin body, a major portion of which is supported in the denture model (secondary plaster), and the pin body is frusto-concial, bar like or plate of moderate tapering, having one or both sides which are flat by grinding, and is provided with a passage at its center vertically running overall length from the head. A modefication has an auxiliary foot for checking rotation of the tooth model. Another modefication has wings on an upper portion of the pin body for concurrently removing the adjacent and plural teeth models from the denture model at once. Distinguishing of the head and the pin body is not essential.

Abstract: A threaded device is provided which can be screwed into the tooth root of a broken tooth to aid in the attachment of a crown or similar prosthesis. The threaded device has a head which is in the shape of a spherical segment of less than a hemisphere which holds a retention ring, a shim, and in some embodiments a coping dish whereby the device of the present invention can be screwed into a threaded hole in the tooth, a dental cement applied thereto and a crown or other prosthesis applied over the head of the bolt and retention ring. In a preferred embodiment of the invention, the retention ring is in the form of a spherical segment which is complementary to the spherical segment of the head to provide a complete spherical head.

Abstract: Dental cements and abrasives are provided which are polymerizable with visible light. Such adhesives. may be applied in thinner films than heretofore possible and demonstrate superior physical properties. Processes employing such materials are disclosed wherein the polymerizatioa of the adhesive is accomplished by transmmitting visible light through tooth or other structures to effect the sdhesion.