Abstract: An endodontic post comprises a combined endodontic post and tip of filling material such as thermoplastic material in a single unit. Obuturating systems are provided by an endodontic carrier and attached filling material. The post and obturator include a protrusion or depression on the tip section of the device for better attachment of the filling material to the device. Alternatively the post and obuturator are fabricated of a tube having a tunnel extending therethrough into which filling material is injected. The filling material extends out of the apical section of the post and obturator to form a filler cone.

Abstract: An endodontic post comprising a combined endodontic post and filling material tip in a single unit. To use the post unit, the device is placed in an oven or heater to heat and soften the thermoplastic material. The device will then be placed in a root canal that has been opened to a predetermined dimension by use of endodontic files, to seal the apical end. If necessary, the gutta percha can be compacted toward the apex, while it is still in the softened state, to ensure the apex is adequately sealed. The post is then cemented into place by lining the canal walls with a bonding agent and filling the interface between the post and the walls of the canal with a dual cure resin cement. This will result in a coronal seal of the canal via resin restorative material and an apical seal of the canal by means of gutta percha and sealant. The remaining portion of the post, extending supra-gingivally, will be used to build a core around it. Any excess will be cut off.

Abstract: A dental post comprising a rod fabricated of fiber-reinforced composite material. The rod comprises a plurality of frustoconical sections arranged coaxially along the longitudinal axis of the rod. Preferably the rod has consistent width along the longitudinal axis wherein the frustoconical sections each have the same tapered width and same length. The number of frustoconical units per rod can vary. The frustoconical sections may vary in shape. Moreover, the rod may include a channel therein extending along the longitudinal axis thereof. The rod may also include one or more grooves extending along the surface thereof.

Abstract: Dental posts and obturators are manufactured herein having a filling material applied to the apical end of the post and obturator such that the adherence strength between the filling material and the post or obturator is very high. The filling material is adhered to the post and obturator by applying one or more corona or plasma treatments to the surface of the post and obturator and thereafter applying the filling material to the surface-treated post and obturator. The surfaces of the post and obturator are modified by the corona or plasma treatments to create a highly adherent surface for the application of the filling material thereto.

Abstract: A preparation (10, 11,12,13) to be fixed to a natural tooth part or tooth, in particular for the replacement of a load-bearing tooth part, is for example a filling for a drilled-out tooth (1), a crown, bridge or prosthesis to be placed on a tooth stub, or a tooth pin to be fixed in a tooth root for fastening an artificial tooth, a bridge or a prosthesis. The preparation has surface regions which consist of a material with thermoplastic properties. The preparation (10, 11, 12,13) is designed in a manner such that it has oscillation properties with such low damping losses that for a liquefaction of the material with thermoplastic properties by way of oscillations there are local stress concentrations required, and in a manner such that such stress concentrations only occur in the region of the preparation surface.

Abstract: A method of securing a dental post in a prepared post hole of a tooth or a crown or bridge to a prepared tooth utilizing a no-mix, two component, self-curing cement wherein the first component is applied with a micro sized applicator to coat the interior surfaces of a post hole, crown or bridge, and wherein the second component is thereafter placed into the coated post hole or onto the surface of the tooth receiving the crown or bridge, and whereby the post, crown or bridge is then fitted onto the prepared tooth. Upon fitting of the post, crown or bridge, the components immediately set to firmly secure the post, crown or bridge onto the prepared tooth.

Abstract: A dental post for supporting a tooth replacement on a natural tooth root has a shank with a first root engagement portion and a second tooth replacement support portion. A non-round countersink structure is on the first portion but is adjacent the second portion. The structure is received in a countersink at the opening of the root canal for helping precluding relative rotation between the post and the root. One or more flexible flanges extend from one or both of the shank portions and the entire post may be made of plastic.

Abstract: A dental anchoring device (8) comprises a threaded anchoring pin (10), connected to a rod (13) by a weakened waisted portion (14). Rod (13) is carried by a main body (11) with a shaped axial blind bore (12) for fitting the body onto a drill shank (2), having a bit (5) receivable on the bore. The body (11) has a deformable lip (18) for snap fitting with a raised ridge (6) on the shank (2). A tapered part (4) of one shank and matching section (15) of the bore are provided with respective flat faces (7, 17) to key the shank to the body. Locking groove (3) keys the shank (2) into the chuck of a dentists drill. In an alternative embodiment (FIGS. 3 and 4), a line of weakness is provided between a metal anchoring pin (21) and a plastics body (27), which is severed when a limiting torque is exceeded. allowing the body (27) to be withdrawn, and the pin (21) to be left in situ.

Abstract: In connection with insertion of a post into a root canal, a simultaneous curing of the tangible sealing ma1terial aggregate is accomplished. Gutta percha or other sealing material is removably attachable to the apical end of the post and heat or other energy is applied to the post, either before and/or after the post is inserted into the root canal of the tooth being treated, to plasticize and condense the tangible sealing material aggregate. The sealing material is removably integral with the post, or removably attached to the post. In other cases, the tangible sealing material aggregate is provided in a tapered tip and is attached to the bottom of the post without heat or other energy sources, or by condensation, and is therefore attached as an uncondensed single point fill. When placed in the root canal, the tangible sealing material aggregate tip is held in place by typical root canal cements, such as eugenol based cements, resin based cements and glass ionomer cements.

Abstract: An easily removable dental post is disclosed. The dental post is provided with a cavity that when necessary to remove the dental post acts as a ream guide or to engage a removing tool such as an Allen wrench. The cavity allows marking of the post through the use of radio-opaque material and the efficient curing of light-curable adhesive.

Abstract: A dental post comprising a rod fabricated of fiber-reinforced composite material. The rod comprises a plurality of frustoconical sections arranged coaxially along the longitudinal axis of the rod. Preferably the rod has consistent width along the longitudinal axis wherein the frustoconical sections each have the same tapered width and same length. The number of frustoconical units per rod can vary. The frustoconical sections may vary in shape. Moreover, the rod may include a channel therein extending along the longitudinal axis thereof. The rod may also include one or more grooves extending along the surface thereof.

Abstract: The invention relates to an applicator system (2) for application of a reinforced non-polymerized composite post (4) or anchor into a dentinal canal (6). The applicator system comprises a fiber-reinforced composite (FRC) post (4) or anchor in its non-polymerized form comprising a resinous matrix and fibers, i.e. a prepreg (4); and an applicator tube (8) wherein the inner diameter (dT) of said tube (8) is essentially the same or slightly larger than the outer diameter (DP/A) of said FRC post (4) or anchor in its non-polymerized form, and the outer diameter (DT) of the end of said tube through which the FRC post or anchor is applied into the canal is essentially the same or slightly smaller than the coronal opening of the canal (6).

Abstract: The invention relates to urethane prepolymers, obtainable by reaction of:

Abstract: The present invention elated to a dental prosthetics and more particularly to an improved support post having a centrally convergent shank portion for securing a dental prosthesis, such as an artificial crown, to the root of a tooth. The invention further relates to a method and a device for strengthening a tooth and a root from which the nerve has been removed and specifically to a dental post which provides centering for the forming of a bracing filler to internally reinforce the walls of pulpless roots while providing for the support of an artificial prosthesis. The invention further provides for a secondary reinforcing device surrounding the central dental post and also being capable of following the contours of the tooth root. This secondary strengthening and reinforcing element is a flexibly coiled wire of a generally helicoid shape, which also serves as a matrix for the luting of composite filler.

Abstract: A flexible post for endodontic or reconstructive tooth therapy having a modulus of elasticity which is less than or equal to that of dentin of 18 GPa (giga Pascals). The present invention is preferably made of medical grade optical glass fibers or fiberglass fibers. The micro filaments of the present invention are treated to impart flexibility to each fiber. The fibers are twisted by twisting on other non-axial arrangements of the fibers to impart strength to the unit post. This allows it to function as a permanent post in a tooth. The dental post is flexible and the post conforms to the natural curved contours of a root canal to reduce machining of the tooth and mechanical weakening of the tooth structure.

Abstract: A dental post comprising a rod fabricated of fiber-reinforced composite material. The rod comprises a plurality of frustoconical sections arranged coaxially along the longitudinal axis of the rod. Preferably the rod has consistent width along the longitudinal axis wherein the frustoconical sections each have the same tapered width and same length. The number of frustoconical units per rod can vary. The frustoconical sections may vary in shape. Moreover, the rod may include a channel therein extending along the longitudinal axis thereof. The rod may also include one or more grooves extending along the surface thereof.

Abstract: The anchorage element for a tooth suprastructure, e.g. a root canal anchor, consists of a fiber-reinforced synthetic material in which the biaxially or multiaxially extending fibers are arranged in a braided netting. Such anchorage elements provide a high flexural and torsional strength, i.e. breaking resistance, as well as a high axial flexibility.

Abstract: A flexible post for endodontic or reconstructive tooth therapy having a modulus of elasticity which is less than or equal to that of dentin of 18 GPa (giga Pascals). The present invention is preferably made of medical grade optical glass fibers or fiberglass fibers. The micro filaments of the present invention are treated to impart flexibility to each fiber. The fibers are twisted by twisting on other non-axial arrangements of the fibers to impart strength to the unit post. This allows it to function as a permanent post in a tooth. The dental post is flexible and the post conforms to the natural curved contours of a root canal to reduce machining of the tooth and mechanical weakening of the tooth structure.

Abstract: Continuous fibers, resin-fiber pastes, or continuous fiber-reinforced preforms are inserted into tooth cavities to form high-strength dental restorations. The fibers may be mixed or coated with a resin monomer and may be used with fillers such as fluoride-releasing fillers and colorants. The resin-fiber mixture may be hardened into preforms suitable for inserting into tooth cavities. Conventional filling materials such as composite resins and glass ionomers may be used to complete the restoration. Other applications include endodontic posts, retention pins, provisional restorations, and indirect restorations. Fiber reinforcement results in strength, toughness and elastic modulus (stiffness) several times greater than those of currently available direct-filling composite resins. The fiber performs are easily handled and placed into tooth cavities; the restorations are aesthetic and wear compatible, and release fluoride.

Abstract: A keeper of the dental magnetic attachment and method for removal of the keeper is disclosed wherein the keeper can be attracted by a magnetic assembly embedded in a denture base. The keeper includes a body made of soft magnetic material and a post made of non-magnetic material that is connected together at the bottom of said body of the keeper. The post has a bendable part that is connected to the body of the keeper.

Abstract: Continuous fibers, resin-fiber pastes, or continuous fiber-reinforced preforms are inserted into tooth cavities to form high-strength dental restorations. The fibers may be mixed or coated with a resin monomer and may be used with fillers such as fluoride-releasing fillers and colorants. The resin-fiber mixture may be hardened into preforms suitable for inserting into tooth cavities. Conventional filling materials such as composite resins and glass ionomers may be used to complete the restoration. Other applications include endodontic posts, retention pins, provisional restorations, and indirect restorations. Fiber reinforcement results in strength, toughness and elastic modulus (stiffness) several times greater than those of currently available direct-filling composite resins. The fiber performs are easily handled and placed into tooth cavities; the restorations are aesthetic and wear compatible, and release fluoride.

Abstract: A fiber-reinforced composite material with graded stiffness, and method of making the same. The degree of stiffness variation may be controlled via modifications to the fabrication processes. Products with varying stiffness along their lengths are described. In one example, a dental post is fabricated from material according to the present invention which has one end with low stiffness adapted for insertion into the root of the tooth, and a high stiffness end suitable to support the restoration.

Abstract: A tooth restoration system for insertion into a tooth upon which root canal therapy has taken place. The system comprises a post, a core and a crown wherein the post is formed from a fibre-reinforced composite material and the core and crown are formed from a ceramic or a polymer/ceramic composite material. The fibre-reinforced composite material is molded to the root canal shape while still in a uncured or partially cured state so that it molds to the root canal. The post is then finally cured and the core and crown built up on the post to form the dental implant. The fibre-reinforced composite material comprises a polymeric matrix and a reinforcing fibre component embedded within the matrix.

Abstract: The present invention relates to the use of novel glass compositions in preparing dental glass pillars and support pillars, and method for producing the glass pillars. The glass material comprises a high percent of boron trioxide which makes possible a reduced alkali oxide content. The dental glass pillars thus obtained are bio-compatible and can be used in the preparation of dental bridgework, most preferably when posterior teeth serving for support of the said bridgework are missing.

Abstract: Radiopaque dental post manufactured from a composite consisting of reinforcing fibers embedded in a resin matrix. The reinforcing fibers of the composite contain a zirconia radiopaque substance in an amount ranging from 10 to 30% by weight.

Abstract: A tubular applicator handle having an applicator integrally formed on either end. The applicable integrally formed on either end may be a brush, foam pad, fuzzy ball or other similar or equivalent applicator, for applying a liquid, paste or powder. The applicator may be use in a method of coating a post hole with a dental material. The present invention has particular adaptability in the dental field for applying dental materials.

Abstract: A dental post comprising a rod fabricated of fiber-reinforced composite material. The rod comprises a plurality of frustoconical sections arranged coaxially along the longitudinal axis of the rod. Preferably the rod has consistent width along the longitudinal axis wherein the frustoconical sections each have the same tapered width and same length. The number of frustoconical units per rod can vary. The frustoconical sections may vary in shape. Moreover, the rod may include a channel therein extending along the longitudinal axis thereof. The rod may also include one or more grooves extending along the surface thereof.

Abstract: The present invention relates to a dental prosthetics and more particularly to an improved support post for securing a dental prosthesis, such as an artificial crown, to the root of a tooth. The invention further relates to a method and a device for strengthening a tooth and root from which the nerve has been removed and specifically to a dental post which provides centering for the forming of a bracing filler to internally reinforce the walls of pulpless roots while providing for the support of an artificial prosthesis. The invention further provides for a secondary reinforcing device surrounding the central dental post and also being capable of following the contours of the tooth root. This secondary strengthening and reinforcing element is a flexibly coiled wire of a generally helicoid shape, which also serves as a matrix for the luting of composite filler.

Abstract: A hybrid fiber-reinforced structural component for dental restorations, wherein the hybrid reinforcing fibers comprise a core having a composite sheath bonded thereto. Preferably, the core comprises a material having a high modulus, such as tungsten, tantalum, niobium, boron or carbon. The composite sheath comprises fibers disposed within a polymeric matrix material, preferably the fibers glass or polyethylene fibers. The hybrid fiber-reinforced composite is particularly useful as a structural component for bridges or for reinforcement of a tooth restoration after endodontic treatment.

Abstract: A shaped member made of composite material for making a prosthetic element, particularly a tooth post, comprising a core of longitudinal fibers embedded in a resin matrix, and a method for making the member, are disclosed. The member is characterized in that the resin matrix contains at least one metal oxide.

Abstract: A feldspathic porcelain composition is provided which comprises a continuous glassy matrix phase and a discontinuous, substantially uniformly dispersed cubic leucite crystalline phase, said composition possessing a fusion temperature of from about 800.degree. to about 1200.degree. C. Methods of making the feldspathic porcelain composition are also provided, said methods comprising the steps of forming an alkali aluminosilicate powder comprising SiO.sub.2, Al.sub.2 O.sub.3, K.sub.2 O and Na.sub.2 O and at least one metal salt of rubidium, cesium, calcium, strontium, barium or thallium; heating the powder to effect an exchange of alkali cations with metal cations derived from said metal salt to provide a feldspathic porcelain composition which comprises a continuous glassy matrix phase and a discontinuous crystalline phase comprising cubic leucite.

Abstract: Dental post to be fitted, particularly, within a dental cavity (3) comprises axial and longitudinal stiffening elements (7). At least a portion of the stiffening elements which is to be fixed within the cavity (3) comprises, at least at its periphery, a curable product (9) capable of yielding under an applied force so as to conform to the walls of the cavity in which it is located. The product is curable after being introduced into the cavity.

Abstract: The method of manufacturing a dental crown for use in replacing a deteriorated tooth includes the steps of making an impression of the patient's teeth including the deteriorated tooth and then making a first model from the impression. The deteriorated tooth is then extracted and a dental post installed in its place. An impression is made of the patient's teeth with the dental post and from this impression a second model is made. By use of heat and pressure a thin plastic foil is applied over the second model. By use of heat and pressure a thicker plastic foil form is made from the first model. Moldable crown forming material is then placed on the plastic foil encapsulated prepared tooth on the second model. The plastic foil form is then placed over the foil covered second mold to shape the moldable crown forming material. The crown forming material is then hardened to create a crown that is removed from off of the foil covered second model and out of the plastic foil form.

Abstract: A post and pin placed in a radicular or root portion of a tooth as well as in the dentin of fractured or badly broken-down vital teeth to facilitate the distribution of stress throughout the roots and provide structure to support repair parts to restore teeth to a natural shape. Dentistically repair is a method for creating a reservoir space in a tooth to receive a composite resin as well as a stainless steel wire and sleeve components to attach and support a tooth repair part for restorations of a fracture or broken tooth chewing surface. The repair components provide a utilitarian structure of a unique nature.

Abstract: A flexible post for endodontic or reconstructive tooth therapy having a modulus of elasticity which is less than or equal to that of dentin of 18 GPa (giga Pascals). The present invention is preferably made of fiberglass fibers, such as optical fibers, medical grade optical fibers, other medical grade fibers or other fiberglass composite fibers. The micro filaments of the present invention are treated to impart flexibility to each fiber. The fibers are twisted by twisting on other non-axial arrangements of the fibers to impart strength to the unit post. This allows it to function as a permanent post in a tooth. The dental post is flexible and the post conforms to the natural curved contours of a root canal to reduce machining of the tooth and mechanical weakening of the tooth structure.

Abstract: A flexible post for endodontic or reconstructive tooth therapy having a modulus of elasticity which is less than or equal to that of dentin of 18 GPa (giga Pascals). The present invention is preferably made of medical grade optical glass fibers. The micro filaments of the present invention are treated to impart flexibility to each fiber. The fibers are twisted by twisting on other non-axial arrangements of the fibers to impart strength to the unit post. This allows it to function as a permanent post in a tooth. The dental post is flexible and the post conforms to the natural curved contours of a root canal to reduce machining of the tooth and mechanical weakening of the tooth structure.

Abstract: A tooth post made of composite material includes a central core (3) made of a resin matrix wherein are embedded fibers (5) which give the post (1) its main mechanical properties. The central core (3) is wrapped in a sheath (6) consisting of at least one layer of fiber (7) made of radio-opaque material.

Abstract: The problems of stability and life of dental restoration disposed in root canals are addressed by a support post for a coronal prosthesis having a ceramic layer of hydroxyapatite, or equivalent, sputter-deposited or plasma sprayed on to a metal support post pretreated with an oxide, by abrasion or by etching.

Abstract: A crown-and-root reconstruction assembly made of a composite materials with a modulus of elasticity varying along a gradient. The assembly comprises a physiological securing post (4) and a crown reconstruction base (1) made of partially or completely light-conducting material. The connection between the crown reconstruction base (1) and the post (4) is achieved by polymerising the material of the base under an isostatic charge. The forming process may be completed by manipulating the material with the fingers through a forming membrane (22) to prevent any gap developing at the interface (10) between the root (8) and the crown reconstruction base (1). A helical arrangement of the fibers (5) of the post (4) ensures that the modulus of elasticity is close to that of the natural dentine, regardless of the angle of incidence at the reconstruction is stressed.

Abstract: A method for manufacturing a ceramic dental replacement includes providing a pin and attaching a ceramic material to the pin to form a ceramic body. The thermal expansion coefficient of the pin, measured at 20.degree. C. to 500.degree. C. is selected to be identical to or up to 3.0 .mu.m/mK greater than a thermal expansion coefficient of the ceramic body, measured at 20.degree. C. to 500.degree. C.

Abstract: A method of producing a dental post for use in restoring or stabilizing one or more teeth includes the steps of creating a hole in a tooth and obtaining a woven hollow rope which is mounted over a mandrel and inserted into the hole. The mandrel is withdrawn and the hollow rope is filled with a core-paste material. In a presently preferred embodiment, the woven hollow rope is woven in the form of a braid and the mandrel is in the form of a hollow needle attached to a syringe. In the preferred embodiment, the hollow rope is provided with a closed end and the needle is withdrawn while simultaneously filling the hollow rope with a core-paste material. The invention includes a new use for hollow woven rope, which is preferably hollow braided rope, in the formation of non-metallic fiber reinforced posts for use in dental application varying from dental posts used to support cores in root canal procedures to providing structural support for bridges, pontics and the like.

Abstract: A post and pin placed in a radicular or root portion of a tooth as well as in the dentin of fractured or badly broken-down vital teeth to facilitate the distribution of stress throughout the roots and provide structure to support repair parts to restore teeth to a natural shape. Dentistically repair is a method for creating a reservoir space in a tooth to receive a composite resin as well as a stainless steel wire and sleeve components to attach and support a tooth repair part for restorations of a fracture or broken tooth chewing surface. The repair components provide a utilitarian structure of a unique nature.

Abstract: An improved dental post is provided in an apparatus for forming a pattern of an apical canal comprising:an elongated apical shaft;a transfer head axially attached to one end of the apical shaft; anda thermoplastic encasing the apical shaft.

Abstract: The present invention relates to a tooth prothesis made of composite material and to a process for fabricating said prothesis. The prothesis is characterized in that it is comprised of a central core (3), made of at least one bunch of fibers (5), for example glass fibers, the core being wrapped by a sheath (7) comprised of at least one layer of oriented, isotropic or non isotropic fibers (8a, 8b, 8c) , the fibers (5) of the central core (3) and the fibers of the sheath (7) being embedded in a curable resin, the fibers (8a, 8b, 8c) of the sheath (7) being oriented in a given angle with respect to the longitudinal axis (yy') of the prothesis (1), so as to adjust to desired respective values the longitudinal and transverse traction resistance of the prothesis (1).

Abstract: A dental post having a top section and a lower section is provided wherein the lower section has a plurality of subsections. The subsections have a progressively reduced effective diameter in vertical direction away from the top section.

Abstract: A method of making a metal one-piece custom post member for non-parallel rooted teeth, including preparation of two root canals of the tooth by using a drill, making a funnel-shaped parallel fixing of entries in the root canals, inserting two posts made of burn-out plastic and sized to the root canals, into the canals, such that upper ends of the posts extend out therefrom, each plastic post having a body shaped as a partially flattened round stick, providing a flattened circle cross-section, one end thereof forming an enlarged cap shaped similarly to the body, treating upper ends of the posts that extend out of the canals with a self-curing resin to bind the posts together to form a plastic one-piece custom post member, removing the plastic one-piece custom post member from the tooth, casting a metal one-piece custom post member of the same size and dimensions from the plastic one-piece custom post member such that the metal one-piece custom post member has two metal posts extending therefrom, each being suf

Abstract: A dental post and core system having an inelastic flexible post. The post, which may be radiopaque and tooth colored, conforms to the natural curved contours of a root canal to reduce machining of the tooth and mechanical weakening of the tooth structure. The post is made of a material having a plurality of fibers, wherein at least one or more of the fibers is non-axially aligned with respect to a straight axis extending from a coronal end to an apical end of a root of the tooth, such as non-axially aligned fibers twisted together, or such as randomly dispersed fibers in a plastic composite. Since not all the fibers are axially aligned, increased strength is achieved by reduction of the possibility of an axially extending fault crack in the resin of the post.

Abstract: 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.

Abstract: A combined storage container and installation device for a dental retentive pin. The storage container is elongated and has a top opening. A cap has a recess therein to hold the proximal end of the dental retentive pin 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 retentive pin may be removed from the container and installed under sterilized conditions without the user touching the pin.

Abstract: A device and method for filling an endodontically prepared tooth and attaching a dental post thereon is disclosed. The device consists of a carrier. Integrally attached to the carrier is a dental post. A break point is located therebetween. A filler material surrounds the carrier and part of the post. In order to install the device, the root canal is prepared. The device is properly measured and thereafter heated. The device is inserted into the prepared root canal. Thereafter, a crown buildup onto the post is performed.