89 results about "Dental bridges" patented technology

In an arrangement with implant and attachment part / dental bridge, the latter comprises one or more recessed walls. The implant is designed or can cooperate with a portion which can be arranged on a spacer sleeve belonging to the implant and extends substantially parallel to the recessed wall. The attachment part and its respective recessed wall is arranged with displaceability in the main longitudinal direction of the implant relative to the outer surface of the portion. The portion is arranged to be expandable so that, in a given position of longitudinal displacement, it is possible to achieve interaction between outer surfaces of the portion and the recessed wall and thus anchoring of the attachment part to the portion or the implant. The invention also relates to a device with two or more implants and dental bridge. By means of the invention, discrepancies between dental bridge and the implants can be taken up in an effective and rapid securing principle.

The invention provides a digital dentistry system that utilizes a haptic interface and features a computer-based design application configured to allow the intuitive construction of irregular, amorphous three-dimensional structures typically seen in dental restorations, utilizing, where appropriate, the design skills of a user. In certain embodiments, the system provides a comprehensive digital solution for dental labs in the business of creating dental restorations such as partial frameworks, crowns, copings, bridge frameworks, implants and the like, with a sense of touch provided by a haptic interface device.

A unit forms part of a dental bridge construction or template therefor. The unit comprises a shell formed by a latex tube and, arranged in the latter, a carbon fiber arrangement wetted with matrix material. The unit forms a unit which can be delivered from a factory and in which the carbon fiber arrangement is optimally wetted with matrix material comprising a one-component material without an excess of base or hardener. The unit is designed to be able to assume a state in which the matrix material is only partially polymerized. In this state of the matrix material, the unit can be stored at a temperature which delays the polymerization of the matrix material in order to permit deferred use in connection with the dental bridge construction or the template. The unit is designed so that, at the time of said use, it can be exposed to a polymerization temperature which, after the desired shaping of the unit, causes substantially accelerated solidifying of the unit in its final shape.

A dental implant apparatus consisting of an auger-like lower threaded portion that is screwed into the bone. It includes a divergent intermediate collar with mini-threads for engaging the cortical bone, and a tapered abutment for fixed tooth replacement or a ball-like snap attachment to secure removable dentures. The apical end of the device has a tapered portion with a blunt tip that condenses the medullar bone, which in combination with the divergent collar engaging and wedging into the cortical bone, provides a dual stabilization structure that can be immediately loaded or placed in light function by cementing on a temporary crown or bridge or by lightly attaching a removable full or partial denture.

Ceramic bodies can be made by providing an initial green body of ceramic; and machining the initial green body to provide a machined green ceramic body. Embedding the initial green body in an embedding mass can be avoided. The initial green body can be bisqued, infiltrated an adjuvant such as machining wax, removing the infiltrated body, and machining it. Highly detailed ceramic products can be generated. The machined green ceramic body may be fired and / or further processed to provide a more finished ceramic body. Examples include a femoral component for a posterior stabilized knee implant, a component body for an artificial rotation device containing knee implant prosthesis a dental implant or bridge, an ice skating blade, and so forth. Zirconia ceramics are advantageously employed, for an example, Mg-TTZ.

A method and a device for effecting the cordless retraction of the gingival sulcus tissue prior to the taking of an impression of a tooth for making a crown or bridge which is attained by controlling any bleeding in the gingival sulcus area, and utilizing a dental dam preferably formed of a sponge or foam like material to contain an astringent fortified silicone impression material embedded about the prepared tooth, and using the patient's biting force to apply the necessary pressure onto the dam until the silicone impression material sets and adheres to the dam to enhance easy removal of the set impression material from the tooth. The dam is formed to accommodate either the posterior teeth or the anterior teeth.

Presented herein are methods and devices for designing dental components, such as physical models of a patient's anatomy, crowns and bridges. An operator of a prosthetic designing system can receive information, such as from a scanner, which provides information on the topology of the patient's dentition. The operator can use this information to design a custom prosthetic to fit the patient. Part of the designing process involves using a finish line defined for a preparation as a segmentation line for a physical die corresponding to the preparation, and using a path of draw line as an insertion axis line for a dental prosthetic.

The invention relates to an automatic machine tool, for the production of base structures, for false teeth, in particular, for tooth crowns and / or tooth bridges of exact three-dimensional shape. Said base structures may be fixed to prepared natural and / or artificial tooth stumps. The machine tool comprises a machine frame, or a body, a work piece carrier, with a rotation shaft, at least one digitization unit, at least one machining unit and an electronic arithmetic and control unit for all drive lines. A carrier for the workpiece, a blank, and / or for the machining unit(s), serves as displacement unit, with three translational axes in the x-, y- and z-directions. The digitization of the preparation model and the machining of the blank are carried out on the same machine tool, at different times. The machining paths for the blank are calculated from the measured and stored digitized data and a predetermined material-specific scaling factor, before the machining of the blank.

A dental composition compatible with acidic dental primers / adhesives, the dental composition comprising (A) 5% (w / w) to 90% (w / w) of at least one polymerizable monomer having at least one ethylenically unsaturated vinyl, acrylate, or methacrylate group; (B) 0.01% (w / w) to 10% (w / w) of at least one compound of structurewhere each of R1, R2, and R3 may be the same or different and is independently selected from H, alkyl, alkoxyl, aryl, acyl, allyl, pyridyl, —OH, alkenyl, aralkyl, cycloalkyl, and heterocyclic structure containing O, S, or N; (C) 0.01% (w / w) to 10% (w / w) of at least one hydroperoxide compound with at least one hydroperoxide groups attached to a tertiary carbon; (D) 5% (w / w) to 95% (w / w) of at least one finely divided filler; (E) 0% (w / w) to 25% (w / w) of one or more components selected from a solvent, a photoinitiator, a stabilizer, and / or an antimicrobial agent. One embodiment of the invention is a dental cementation or core buildup kit that has enhanced compatibility between the acidic primer / adhesive and the cement or core buildup material, and therefore enhanced adhesion to a tooth. The kit includes (I) an acidic primer / adhesive composition having a pH less than 4.5; and (II) a cement or core buildup material having the above described composition comprising components (A)-(E). Another embodiment of the invention is a method for adhering a prosthetic device to a tooth to restore the function and / or appearance of a diseased tooth. Another embodiment of the invention is a method of providing a temporary cement, crown and / or bridge, inlay, onlay, endodontic sealer, and / or an endodontic filling material, using the inventive composition.

A dental prosthesis foundation capable of being finished or adjusted or repaired and which may be assembled and adjusted to variable jaw ridge sizes, and formed with self-curing hardened resins. The foundation supports prosthetic teeth and is permanently but removably secured to the jaw by implants embedded in hard dental tissue, such as tooth stubs or bones. The dentures can be readily repaired or adjusted for changes in the jaw of the patient, by chairside techniques available to dentists. The foundation can also be adjusted to changes in size and shape of ridges in the jawbones for more comfortable use of the dentures secured on such prostheses.

Certain embodiments of the invention relate to a method of manufacturing a dental bridge. In certain embodiments of the method, a pre-sintered blank made from a green body of ceramic material is subjected to a machining operation that transforms the blank into an intermediate product with a bridge structure and a support body linked to the bridge structure by one or several retaining sections that extend from the support body to the bridge structure. In certain embodiments, a sintering operation is then performed on the intermediate product while the retaining section(s) still link(s) the support body to the bridge structure.

A dental composition compatible with acidic dental primers / adhesives, the dental composition comprising (A) 5% (w / w) to 90% (w / w) of at least one polymerizable monomer having at least one ethylenically unsaturated vinyl, acrylate, or methacrylate group; (B) 0.01% (w / w) to 10% (w / w) of at least one compound of structure where each of R1, R2, and R3 may be the same or different and is independently selected from H, alkyl, alkoxyl, aryl, acyl, allyl, pyridyl, —OH, alkenyl, aralkyl, cycloalkyl, and heterocyclic structure containing O, S, or N; (C) 0.01% (w / w) to 10% (w / w) of at least one hydroperoxide compound with at least one hydroperoxide groups attached to a tertiary carbon; (D) 5% (w / w) to 95% (w / w) of at least one finely divided filler; (E) 0% (w / w) to 25% (w / w) of one or more components selected from a solvent, a photoinitiator, a stabilizer, and / or an antimicrobial agent. One embodiment of the invention is a dental cementation or core buildup kit that has enhanced compatibility between the acidic primer / adhesive and the cement or core buildup material, and therefore enhanced adhesion to a tooth. The kit includes (I) an acidic primer / adhesive composition having a pH less than 4.5; and (II) a cement or core buildup material having the above described composition comprising components (A)-(E). Another embodiment of the invention is a method for adhering a prosthetic device to a tooth to restore the function and / or appearance of a diseased tooth. Another embodiment of the invention is a method of providing a temporary cement, crown and / or bridge, inlay, onlay, endodontic sealer, and / or an endodontic filling material, using the inventive composition.

This invention relates to methods and devices for restoring teeth using fixed restorations. In particular, the invention provides a system, kit, and devices for the management of interproximal areas for traditional cementation and / or bonding of dental crowns, onlays, inlays, veneers and bridges. In the method, a barrier is positioned in contact with the tooth being restored and an adjacent tooth to cover a section of the tooth being restored and to create separation of the tooth being restored and the adjacent tooth. Cement is applied to the first mating surface of the fixed restoration and / or to the second mating surface of the tooth, and the first mating surface of the fixed restoration and the second mating surface of the tooth are positioned adjacent each other to seat the fixed restoration on the tooth. The barrier covers a section of the tooth being restored to prevent cement from bonding to the section of the tooth. This eliminates the need to remove hardened cement from this section of the tooth.

A method for producing an abutment cap for use in the preparation of a dental crown or bridge. In one embodiment, data indicative of the abutment cap are inputted to a computer driven rapid prototyping device. The rapid prototyping device is then operated so as to produce the abutment cap by a rapid prototyping process. The method may be used to produce an abutment cap for an abutment not having a cylindrical shape or to produce an abutment cap for an abutment not projecting perpendicularly from the jaw. The invention also provides a system for carrying out the method as well as abutments produced by the method.

A holding device comprises a cylindrical or prismatic, porous ceramic blank and elements for clamping in a machine tool for processing the blank by removing material, in order to produce a ceramic workpiece. A narrow frame is fixed by an adhesive connection over at least part of the periphery of the blank, which is held without stresses, in the area of a plane encompassing the longitudinal middle axis (A) of the blank. The frame only covers a small part of the surface of the blank and can be detached and held in a stable holder with a clamping adapter, in such a way that it cannot slide. The entire combination is fixed in the machine tool in such a way as to be resistant to twisting and sliding. The ceramic workpiece emerges continuously form the ceramic blank without predetermination of the advance direction, until holding segments which can then only be freely selected according to number and location have been formed. The holding segments end on the residual material of the blank in the area of the frame or on the frame itself. The holding device is used especially as a workpiece for producing fully ceramic dental prostheses, particularly crowns or bridges.

The invention provides methods of making provisional and long-term dental restorations, particularly dental veneers, crowns and bridges. In one embodiment, the restoration can be fabricated indirectly by a dental laboratory. In another version, a dental practitioner can make the restoration chairside for a patient in a dental office. A polymerizable dental composite material, which is dimensionally shape-stable in its uncured state, is used to make the restoration. A substructure such as a metal coping can be used to support the polymerizable material. The material includes a polymerizable acrylic compound, polymerization initiator system capable of being activated by light or heat, and preferably a filler material. The resulting dental restoration has good aesthetics, mechanical strength, and margins and contacts.

Shape memory dental retention systems which facilitate the adjustment or removal of an oral appliance, e.g., a crown or bridge, from a reconfigurable abutment assembly are described. The adjustable abutment assembly may be secured to an anchoring implant bored into the bones within the mouth. The abutment assembly has a projecting abutment portion with one or more shape memory material sleeves or plates or elements extending along the abutment. Each of the sleeves has a length with at least one curved or arcuate portion. Energy may be applied to the elements such that the arcuate portion flattens to allow for the oral appliance to be placed thereupon while removal of the energy allows the elements to reconfigure into its curved configuration thereby locking the oral appliance to the abutment. Removal of the oral appliance may be effected by reapplication of energy to the elements.

The invention discloses a room-temperature addition silicon rubber putty-type dental impression material applied to primary impression. The room-temperature addition silicon rubber putty-type dental impression material is composed of a substrate component and a catalytic component in a blending manner, wherein the substrate component is composed of vinyl silicone oil, hydrogen silicone oil, a bulking agent, an enhancer and other assistants according to a certain ratio; the vinyl silicone oil contains more than two vinyl functional groups; the hydrogen silicone oil contains more than three Si-H functional groups; the catalytic component is composed of vinyl silicone oil, a catalyst, a bulking agent, an enhancer and other assistants according to a certain ratio; and the catalyst is a complex of chloroplatinic acid and vinyl silicone oil. The room-temperature addition silicon rubber putty-type dental impression material is rational in formula, and easy to operate, the elastic recovery of the cured material can be up to 99.8%, the curing time is 3-5 minutes, the shore hardness is about 65, and the dental impression material is finely copied into 0.02mm and clearly visible, and can be applied to fabrication of accurate dental crowns, and delivery of dental bridges, false teeth, articulation registration and oral cavity tissue.

The present invention is related to systems and methods for manufacturing dental prostheses, such as bridges and crowns. In particular, the present invention is directed to novel methods for managing machining jobs for manufacturing dental prostheses in a system having a plurality of machining devices.

The present disclosure provides a dental bridge intermediary structure (20) comprising a superstructure (200) and a connection piece (210), as well as connection piece for a dental bridge intermediary structure (20). A method for producing a dental bridge superstructure (200) is also provided.

Aerogel, calcined articles, and crystalline articles comprising ZrO2. Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons).

A system for attaching a natural tooth to a dental implant. The system includes a dental prosthesis and an elastomeric cushion. The dental prosthesis has a first end and a second end. The first end is fixed to a natural tooth and the second end is engaged with a dental implant. The elastomeric cushion is positioned in contact, either directly or indirectly, with at least a portion of the dental implant and at least a portion of the dental prosthesis such that the elastomeric cushion permits movement of the second end relative to the dental implant in response to movement of the natural tooth transferred through the dental prosthesis to the second end.

The invention discloses a preparation method for forming a ceramic dental crown / bridge through digital plane projection. The preparation method comprises the following steps: obtaining three-dimensional data of a dental crown or a dental bridge, scaling up and then discretely stratifying the three-dimensional data, projecting a digital ultraviolet source in ceramic slurry in a dental crown or dental bridge discretely stratified two-dimensional plane form and enabling the ceramic slurry to come into contact with photosensitive materials of ultraviolet under the action of ultraviolet plane projecting beams to be solidified, so that the liquid ceramic mixed slurry in the region is solidified; enabling the ceramic slurry outside the ultraviolet plane projection region to continuously exist in the form of liquid and automatically aligning and connecting the solidifying region on the current stratum with the solidifying region on the next stratum until all the stratified data are completed; after all the three-dimensional discrete surface data are projected, taking out a forming substrate together with a solidified sample on the forming substrate and finally obtaining the ceramic dental crown or dental bridge through the processes of high temperature sintering, and the like. The preparation method has the advantage and effect that the defect that free forming is difficult to achieve as the structure complexity is high when ceramic dental crowns or dental bridges are prepared by traditional cutting processes is avoided.

The present invention relates to a temporary bridge tooth using a resin veneer shell plate that is characterized in that each veneer shell with a shape of a front tooth is connected with each other, and the connected shape is a curve shape like the shape of actual front teeth of a human, and the entire construction of the temporary bridge tooth is formed in a thin plate shape, and a connected portion of each veneer shell is thinner than the other portions.

Provided is a removable bridge system for attachment to a plurality of dental implants, including a removable anatomic bridge framework generally conforming with dental parameters of the individual and configured with a crown portion, the removable anatomic bridge framework having a bottom surface formed with a plurality of separate and spaced apart receiving apertures, each receiving aperture shaped so as to snugly fit, at high tolerance, over at least portions of corresponding abutment head; the removable anatomic bridge framework is further configured with a locking arrangement comprising one or more locks for detachable locking to a locking abutments; and at least a crown portion of the removable anatomic bridge framework is fitted with or integrally formed with an individual crown, the individual crown generally conforming with and mimicking the dental parameters of the teeth of the individual.

Dental prostheses and methods for making them are disclosed. In one embodiment, a method comprises a sequence of steps including milling a cavity in a block of a coping material, filling the cavity with a green ceramic material, milling a portion of the green ceramic material away to leave a layer of green ceramic material on an occlusal surface formed in the coping material, milling the underside of the block of coping material to form the coping with green ceramic material, and sintering the coping with green ceramic material to complete the prosthesis. The milling steps may be performed by a computer-controlled mill. The computer may execute a CAD-CAM program that includes data from a three dimensional model of a tooth that is to receive the prosthesis. The dental prosthesis may be a dental crown or a dental bridge.