48 results about "Dental post" patented technology

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.

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.

A dental core and post system for restoration of teeth includes a core device and a dental post formed as a rod-like member extending along a central vertical axis between a coronal end and an apical end. At least one portion of the rod-like member including the apical end is configured for fixation within a root canal of a tooth for restoration. The core device is attached to or is integral with the coronal end of the dental post. At least one of the core device and dental post include an inner, low-density volume configured to limit mechanical forces communicated through the core device and dental post coaxially with the central vertical post axis after fixation.

A fiber optics dental post includes a resin body and plural fiber optics center shafts; wherein the resin body includes an outer peripheral face, a receiving irradiation portion, and a bottom; each of the fiber optics center shafts pierces through and is fixed in the resin body, and has a receiving irradiation end and a light-guide irradiation end; each receiving irradiation end placed on the receiving irradiation portion of the resin body is used to receive the light irradiating on the receiving irradiation portion, and each light-guide irradiation end is respectively placed on the outer peripheral face and at the bottom of the resin body, thus the light received by each receiving irradiation end is propagated to the outer peripheral face and the bottom of the resin body through the light-guide irradiation end for irradiation, so as to effectively enhance the adhesion strength of the dental post.

The invention relates to an applicator system (1) for application of a prefabricated reinforced composite post or anchor in its non-cured form into a dentinal canal (3). The invention is characterized in that the applicator system (1) comprises a prefabricated fiber-reinforced composite post or anchor in its non-cured form comprising a matrix and fibers, and an applicator tube (5) having a first end and a second end, wherein the inner diameter dT of said tube (5) is at most 5% larger than the outer diameter DP / A of said post or anchor in its non-cured form, and the outer diameter DT of the second end of said tube (5) through which the post or anchor is applied into the dentinal canal (3) is 0,5-2 mm. The invention further relates to the use of said applicator system.

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.Dental restorations are manufactured herein wherein a veneer is applied to a dental substructure and the adherence strength of the veneer to the dental substructure is very high. The veneer is adhered to the dental substructure by applying one or more corona or plasma treatments to the surface of the dental substructure and thereafter applying the veneer to the dental substructure. The surface of the dental substructure is modified by the corona or plasma process to create a highly adherent surface for the application of the veneer thereto.

A tooth crown suspended artificial tooth is composed of two tooth roots containing root tubein it, tooth pile with nails inserted in said root tubes for fixing it and a top concave cavity, an elastic buffering unit fixed insaid concave cavity and with a fine rod, and a tooth crown fixed to said fine rod.

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.

A post for a dental crown is disclosed having improved structural features—including increased post strength and reduced likelihood of root fracture. In one embodiment, the post includes a quadrangle (4-way) split shank for increased compliance and root stress reduction while providing very high mechanical grip strength and pull-out resistance. In another embodiment, a shortened threaded section and a thread-free shank tip minimize the possibility of root fracture while still providing high grip strength and pull-out resistance. Embodiments also include a radiused transition from a primary thread to a secondary thread portion of the shank for stress reduction; and axial grooves, cross-axis through holes and other shape features of the post head for increased crown retention strength.

A personalized metallic dental pile simulating mechanical properties of natural teeth comprises a pile and a core. The pile and core formed integrally; the metal dental pile comprises a compact part and a loose part; the loose part is located in the contact area of the dental pile and the residual root or residual tooth; and the elasticity modulus of the loose part is lower than that of the compact part. The manufacturing method of the metal dental pile comprises the following steps: conducting conventional repair design and tooth preparation; acquiring digital dental impression of a patient; designing a three dimensional model of the dental pile with according to the structure characteristics of the root canal and the residual tooth of the patient's; conducting adaptation of the pile and the root canal of the residual tooth, and finding out the contact area of the dental pile with the residual root or residual crown; setting the contact area as the loose part; setting the area outside of the contact part as the compact part; forming the dental pile; and trimming the dental pile to make the dental pile seal with the root canal of the patient's. The invention has the advantages of high adaptation, high flexural strength and no damage to the tooth root.

The invention relates to a dental restoration thread fiber pole which is characterized by comprising a head part, a middle section and a tail part, wherein the head part is provided with an oblique spiral groove, the tail part is a cone-shaped part, the shape and the size of the tail part are consistent with the shape and the size of a cone-shaped part of a dental drill bit, the cone-shaped part of the middle section near the tail part is provided with a groove, and a smooth straight section is arranged between the groove and the oblique spiral groove of the head part. A dental restoration thread pole core is an integer and is formed once, and physical locking force of the dental restoration thread pole core and a light-cured resin core is increased by the designed oblique spiral groove so as to increase interface strength. The dental restoration thread fiber pole reduces restoration failure caused by debonding the pole core in clinical application, but also has better transfer stress with the core, thereby avoiding the dental post break caused by stress concentration. The dental restoration thread fiber pole can be finely processed by a machine tool, has simple method, small errors and high consistency and can be produced in a large scale.

Embodiments of the present invention include devices and methods that provide an effective endodontic drill bit to drill postholes for use in root canals and similar or related dental procedures. In particular, example embodiments of the present invention provide an endodontic drill bit that can be used by a dental professional to drill a posthole with a particular diameter, while at the same time causing the side wall surfaces of the posthole to include a texture that can increase the mechanical retention of a dental post in the posthole. In example embodiments, the endodontic drill bit includes an abrasive grit that is attached or is part of the land of the endodontic drill bit.

The invention relates to a poly(p-phenylene benzobisoxazole) (PBO) fiber reinforced composite material for a dental root canal post and a preparation method thereof. The fiber reinforced composite material for the dental root canal post comprises a surface modified PBO reinforced fiber which is used as a reinforcing phase and a nanometer modified toughening resin which is used as a matrix. The composite material is compounded by mixing the PBO reinforced fiber with the toughening resin, wherein the PBO reinforced fiber adopts a 3D braided structure. According to the invention, a breakthrough is made to the design of unidirectional reinforcement with single-phase fibers in conventional fiber post structures, the high-performance PBO fiber and the 3D braided structure are introduced into a dental post material, so the flexural behavior of a conventional fiber post is improved, and good interfacial bonding force between the high-performance fiber and the resin matrix is guaranteed; and through adoption of the 3D braided structure, layering of the laminated composite material is effectively avoided, so excellent mechanical properties of the composite material in vertical, transverse and thickness directions are guaranteed.

A dental post consisting of fibre-reinforced material with substantially uniformly directed fibers and mountable in a tooth root canal for fixing a dental prosthetic structure on a tooth stump and a method for its fabrication.For improving the light conduction properties within the post, at least a fraction of said fibers are adapted for light conduction within said post and said post comprises a tapered portion extending towards its second end, wherein at least a fraction of said light conducting fibers extend from the first end of said post to the circumferential surface of said tapered portion.An advantageous fabrication method of the dental post comprises forming of a composite structure of uniform cross-section with substantially uniformly directed light conducting fibers in a pultrusion process and shaping of at least a portion of the circumferential surface of said composite structure in order to provide a tapered portion extending towards the second end of said composite structure.

The invention discloses an integrated fiber post for dental restoration and a preparation method thereof. The integrated fiber post for dental restoration is characterized by integrating a post and a core and comprising a post and core tail part and a head core part; the conical structure of the post and core tail part is consistent with the conical structure of a dental drilling head; the head core part is in an umbrella cap structure; the lower edge of the umbrella cap structure is fully matched with the residual part of a defected tooth; the outline part of the umbrella cap structure is fully matched with a crown part; and a porcelain crown is directly sleeved on the head core part. The method for forming and machining the integrated fiber post comprises the following steps of: (1) acquiring CT (computed tomography) data of the defected tooth; (2) reconstructing the three-dimensional model of the tooth and a post and core crown through a computer; (3) building a CAD (computer-aided design) model of the integrated post and core; (4) transferring the information of the CAD model of the integrated fiber post and core into a CAM (computer-aided manufacturing) numerical control center; and (5) cutting and machining the integrated fiber post and core by a machining center of a numerical control machine. The fiber post of the invention has improved strength, reduced post and core abhesion in application, and avoidances of breakage of tooth posts and failure of restoration caused by stress concentration.

Securing a dental post or a crown or bridge onto the dentin portion of a prepared tooth by utilizing a no-mix, two component, self-curing cement wherein the first component of the cement is applied to the interior dentin surfaces of a post hole, or onto the dentin surface of the tooth receiving the crown or bridge, and applying the second component of the cement onto the surface of a post, or crown or bridge so that when the post or crown or bridge is fitted onto the exposed dentin of a prepared tooth, the complementary components of the cement immediately chemically set to firmly secure the post, crown or bridge onto the prepared tooth. The respective components of the no-mix, two component, self-curing cement formulation for practicing the method require that each include a methacrylate resin. One of the components also includes an aromatic tertiary amine and the other component includes an organic peroxide. At least one or both of the components also includes hydroxyethyl methacrylate or hydroxypropyl methacrylate or other hydrophilic monomers. Additives such as thickeners, fillers, fluoride salts, and polymerization inhibitors may also be included in one or the other component.

The present invention relates to a dental post (1) for supporting dental prostheses (2) by means of a screw attachment and method for the manufacture thereof which provides a customizable optimum solution for each case, both from the mechanical viewpoint and from the aesthetic viewpoint, essentially comprising an upper hole (8′) into which the retaining screw (4′) is screwed for retaining the prosthesis (2) on the post (1) such that the upper hole (8′) can be located at any point of the surface of the post once said post (1) has been customized in terms of the shape thereof and type of retention to the prosthesis (2) depending on the mechanical and aesthetic needs of the type of rehabilitation suitable for each particular case.

A dental post includes a composite material such as long fibers embedded in a resin matrix, and is able to transmit visible radiation when it is lit by a dental lamp to ensure polymerization of a product for setting in a tooth's root canal. The post, which has a specific color determined at ambient temperature before insertion into said canal, and which contains at least one thermochromic substance able to provide said specific color, loses its color when in place in the canal. A method for forming the dental post and a kit including a plurality of dental posts and drills are also disclosed.

The present invention is a dental implant utilizing a polymeric dental post. The actual prosthetic portion of the implant may also be manufactured from a polymer. Various post designs are disclosed for setting and securing the post in a patient's jaw. Numerous polymers are disclosed and may be blended to achieve desired characteristics for both the post and prosthetic.

Wound-healing unit for connection to a dental implant during a wound-healing phase of a dental restoration procedure, comprising a wound-healing element (10) intended to be surrounded at least partially by gum (63), and an abutment (1) intended to be fixed in an implant (60), characterized in that the wound-healing element comprises a lateral surface (13), which is intended to be integrated within gum in order to shape the gum during the wound-healing thereof, and an end surface (14), a part of the lateral surface (13) and of the end surface (14) forming a protruding surface, which is intended to remain outside the gum and is asymmetrical with respect to at least a perpendicular median plane, and in that the abutment comprises a longitudinal axis (L) along its entire length, for alignment with the axis of an implant (60).

The invention is about the dental post system designed to protect the dental tissues left and is aimed to use for the treatment of teeth with excessive dental material loss in the fields of endodontic, prosthetic dental treatment and pedodontics.

An orthodontic post and pin system for secure attachment of a dental appliance to an alignment wire, which also facilitates quick and easy removal and replacement. The system described herein uses a “twist-lock” dental post that is rotated onto, and counter-rotated off of, an alignment wire. The dental post includes structural elements to facilitate the twist-lock functionality, as well as structures for accepting a fastener to secure the alignment wire in place and inhibit unintentional or undesired dislodging.

The invention relates to the technical field of dental post-core crown repair, and particularly discloses a machinable high-light-transmittance fiber resin composite material for dental post-core crown repair and a preparation method. The high-light-transmittance fiber resin composite material comprises fibers and a resin matrix; the fibers have high X-ray radiation resistance, the refractive index is 1.54-1.6, and the resin matrix comprises epoxy resin, an epoxy curing agent, an accelerant, a release agent, an antioxidant and filler; and the diameter of the high-light-transmission fiber resin composite material is 10-100 mm. The preparation method comprises the steps of fiber carding, fiber infiltration and pultrusion. The high-light-transmission fiber resin composite material has strong X-ray radiation resistance and high light transmission, the size of the high-light-transmission fiber resin composite material can be used for more CAD / CAM systems; in addition, the fiber resin composite material has good elastic modulus, bending strength, biocompatibility and aesthetic performance.

An adjustable dental implant comprises an implant body, a connecting structure, and two wings. The implant body comprises a fixture and an abutment. The fixture comprises a top, a bottom, a peripheral surface connected between the top and the bottom, and a joining portion formed on the peripheral surface. The abutment is set on the top of the fixture. The connecting structure is set between the fixture and the abutment. The wings are pivotally connected with two opposite sides of the connecting structure. Or, one of the wings is pivotally connected with the connecting structure, and the other wing is fixed with the connecting structure. The wing or the wings may be adjusted to fit the surface of the cortical bone. Dental posts are allowed to penetrate the alveolar bone entirely to secure the fixture.

A dental post configured to be fitted within a dental cavity of a tooth being restored. The post comprises a head portion and a foot portion consecutively arranged in an axial direction of the post, the axial direction being defined as a direction in which a central axis of the head portion extends. The foot portion comprises a free lower end such that the post can be inserted into the dental cavity in the axial direction with the lower end inwardly facing a closed inner end of the dental cavity. At least the foot portion is composed of a composite material comprising a resin matrix reinforced with fibers. A method of fabrication of such a dental post, and to set comprising at least two such dental posts. To allow a better adaptability of the dental post to a variety of naturally occurring dental cavities, the foot portion comprises a plurality of rods being separated from one another along the axial direction of the post such that each rod is bendable in a transverse direction with respect to the axial direction.