203 results about "Dental crowns" patented technology

A dental prosthesis for periodontal integration is disclosed. Furthermore a customized dental prosthesis for osseointegration is disclosed having a first manufactured portion shaped to substantially conform to the three-dimensional surface of a root of a tooth to be replaced and a second manufactured portion shaped to substantially conform to the three-dimensional surface of a crown of a tooth to be replaced. Furthermore a customized manufactured splint is disclosed to position and fixate a tooth-shaped prosthesis. Furthermore a CAD / CAM based method of and a system for manufacturing a customized dental prosthesis replacing an extracted tooth is disclosed, where the extracted tooth is scanned regarding its three-dimensional shape and substantially copied using (a) an imaging system in-vitro like a 3D scanner or in-vivo like a cone beam CT system, (b) CNC machinery and (c) biocompatible material that is suitable to be integrated into the extraction socket and at least partially adopted by the existing tissue forming the socket.

A method for concurrently measuring a force exerted upon each of a plurality of teeth is disclosed. A dentition crown connecting rod associated with a force gauge is positioned such that a dentition crown coupled to the dentition crown connecting rod may be received within a corresponding cavity of a reference aligner. A measurement aligner is then applied to the dentition crown, wherein the dentition crown is positioned to be received within a corresponding cavity of a reference aligner. A force exerted on the dentition crown by the measurement aligner is then calculated.

A dental prosthesis for periodontal integration is disclosed. Furthermore a customized dental prosthesis for osseointegration is disclosed having a first manufactured portion shaped to substantially conform to the three-dimensional surface of a root of a tooth to be replaced and a second manufactured portion shaped to substantially conform to the three-dimensional surface of a crown of a tooth to be replaced. Furthermore a customized manufactured splint is disclosed to position and fixate a tooth-shaped prosthesis. Furthermore a CAD / CAM based method of and a system for manufacturing a customized dental prosthesis replacing an extracted tooth is disclosed, where the extracted tooth is scanned regarding its three-dimensional shape and substantially copied using (a) an imaging system in-vitro like a 3D scanner or in-vivo like a cone beam CT system, (b) CNC machinery and (c) biocompatible material that is suitable to be integrated into the extraction socket and at least partially adopted by the existing tissue forming the socket.

The present invention is prosthetic tooth replacement including a dental crown portion and a joining portion adapted to fixedly attach to a dental implant. Further, present invention also comprises the combination of a prosthetic tooth replacement and a dental implant. Additionally, the present includes a method for making an oral surgical guide stint by vacuum forming a thermoplastic material over a model of an implant target area. Finally, the present invention includes a method of inserting the combination of the prosthetic tooth replacement and implant into the jaw of a patient.

A Mass Custom Manufacturing System and methods are provided. A single master file is created for a restoration (or multiple restorations for a single patient) from a scan. Copings / cores, abutments and other companion pieces are designed using the master file through a deconstruction method allowing for simultaneous CAM of those pieces. A centralized system controls design and manufacturing, allowing the system to “learn” from feedback from the CAM operations of prior pieces and incorporate such feedback into the design phase.

Provided is a method for manufacturing a surgical guide, and a crown and an abutment in a mouth for a dental implant, including an operation of obtaining a primarily scanned image through scanning of inner and outer surfaces of a denture which has a first image matching groove matched with a patient's tooth implanting portion and in which a plurality of reference markers are attached to an outside, obtaining a secondarily scanned image through oral scanning of upper and lower jaws while the denture is installed, preliminarily matching the secondarily scanned image with the primarily scanned image, obtaining an integrated scanned image considering a vertical dimension by reversing the first image matching groove so that an image of the first image matching groove is dimensionalized from the primarily scanned image, and obtaining a CT image through CT scanning of the upper and lower jaws.

A dental crown consisting essentially of stabilized zirconia. The dental crown is particularly suited for pedodontic and veterinary applications. The zirconia crown may be formed by one of several manufacturing processes. The formed crown exterior is polished and fine polished to produce an aesthetic outer surface mimicking a natural tooth. Also disclosed is a method for providing a dental crown to a natural tooth and a kit of prefabricated crowns.

The present invention provides methods and systems of repositioning teeth for use in orthodontic treatment, with particular applicability to removable elastic repositioning appliances. Such appliances may be challenged by traditional tooth movements which intrude the crown of the tooth or present tooth positions which reduce available points of purchase. These challenges may be overcome with a series of tooth movements in which a tooth is translated in a “root-first” position. The movements may take advantage of the inherent characteristics of elastic repositioning appliances in translating a tooth from a first position to a desired position along a gingival plane.

A dental crown that includes a stainless steel shell sized to cover a tooth portion of a patient and a polymeric coating including a polyester / epoxy hybrid composition.

The invention provides a method of forming dental restorations, particularly dental crowns. The method involves applying a flexible cement composition to a prepared tooth surface. The composition is polymerized so that it substantially hardens. A composite crown-forming material is dispensed into a substantially transparent plastic matrix. The matrix is placed in the mouth of the patient so that the composite material is molded over the tooth surface. Then, the material is irradiated with curing light, through the matrix, so that it hardens to form a dental crown. The crown has good mechanical strength and is resistant to fracturing and breaking.

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.

The invention provides a method of forming dental restorations, particularly dental crowns. The method involves applying a flexible cement composition to a prepared tooth surface. The composition is polymerized so that it substantially hardens. A composite crown-forming material is dispensed into a substantially transparent plastic matrix. The matrix is placed in the mouth of the patient so that the composite material is molded over the tooth surface. Then, the material is irradiated with curing light, through the matrix, so that it hardens to form a dental crown. The crown has good mechanical strength and is resistant to fracturing and breaking.

This invention pertains to a tooth implant which is obtained from a donor's jawbone. The tooth implant includes the root of the donor's tooth with the crown detached therefrom and a portion of the donor's jawbone which surrounds the root and is attached thereto. The implant is obtained by carefully harvesting the root with the attached portion of jawbone surrounding the root as a single unit from a donor individual. The tooth implant is implanted into an opening in a recipient's jawbone. Upon healing, the implant is firmly and permanently attached to the bone tissue of the recipient. The root of the implant may then be used to affix a prosthetic crown within the jawbone of the recipient.

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.

A composite material for reparing tooth and human hard tissue is prepared through preparing the partly sintered ceramics, surficial coupling, and vacuum dipping in resin while in-situ polymerizing.

A digital abutment is provided to assist in taking digital impressions of a patient's mouth for design and manufacture of a prosthetic tooth. The digital abutment can receive a temporary crown so that the digital abutment can remain in place for preserving the gingival architecture while waiting for a final crown and a final abutment.

An improved implant root for tooth implanting, a coarse threaded portion of the implant root is formed to have at least two helical treating surfaces each with an HA coating (covered with hydroxyapatite) and each extending in the vertical direction. The areas of the HA coatings can thus be increased in favor of fast growth of a bone of a denture base after implanting into the bone to envelop the implant root; this can shorten the curing process from implanting the implant root to mounting a crown.

The invention relates to a measurement method for a temporo-mandibular joint and a preparation method of an intraoral splint and belongs to the field of oral medical treatment. The measurement method for the temporo-mandibular joint comprises the steps of obtaining an oral model of a patient, determining a target image of the patient via the oral model, separating an upper jaw and a lower jaw according to the target image to allow the lower jaw to be free, allowing dental crown images in different jaw position states to be matched and overlapped with a corresponding dental crown image, and guiding the free lower jaw to a corresponding jaw position to determine an image of the temporo-mandibular joint. The measurement method has the advantages of low cost, high efficiency and accuracy and facilitates orthodontics of a patient with temporo-mandibular disorders.

Provided is an apparatus for generating dental data for manufacturing an aligner, the apparatus including: a dental-data generation unit, in which the dental-data generation unit includes a preprocessing module includes a first module that receives data on a current state of the teeth of the patient from a scanner that scans the current state of the teeth of the patient, a second module that generates a state of the teeth of the patient and the vicinity of the teeth as 3D data, based on the data received from the scanner, a third module that sets a central point for dental movement in the 3D data, a fourth module that sets each central reference for a crown, a buccal surface, and a lingual surface of the tooth in the 3D data, and a fifth module that sets a reference for a dental root point in the 3D data.

The invention provides an artificial dental abutment, an artificial dental multi-part implanting system and an implanting method. A crown connection section and an implant connection section are respectively arranged at two ends of the artificial dent abutment, wherein the included angle of the axis of the crown connection section and the axis of the implant connection section is 10-30 degrees. The artificial dental abutment can adapt to various oral implanting conditions and angles. An artificially implanted tooth has a harmonious and beautiful repairing effect with surrounding tissues and remained dentition by adopting the abutment. The invention discloses an artificial dental multi-part implanting system comprising the artificial dental abutment, wherein the implant is a multi-part and nonsubmerged technology combined implant, is high in stability and strength, and can adapt to various oral implanting conditions and angles, can be used for effectively reducing the local stress, shortening the healing time and reducing the hurt of patients.

A method is disclosed for forming an accurate stone cast from an impression of a body region, used for the purpose of prosthetic fabrication, such as dental crowns and artificial eyes and hearing aids. The initial step with this unique method is to first acquire a suitable amount of dental stone catalyst. One type of a suitable stone catalyst is calcium sulfate dihydrate. The dental stone catalyst is engaged onto the internal surface of the impression. This catalyst, placed in the area between impression material and stone, will act to hasten the initial setting of wet, mixed dental stone that is in closest proximity to the impression. The result is a stratified set of the stone. Setting of the wet, mixed dental stone occurs first at the impression / stone interface. The mixed stone better resists distortion upon setting and the resultant set stone cast is more accurate.

Provided is a method for manufacturing a surgical guide, and a crown and an abutment in a mouth for a dental implant, including an operation of obtaining a primarily scanned image through scanning of inner and outer surfaces of a denture which has a first image matching groove matched with a patient's tooth implanting portion and in which a plurality of reference markers are attached to an outside, obtaining a secondarily scanned image through oral scanning of upper and lower jaws while the denture is installed, preliminarily matching the secondarily scanned image with the primarily scanned image, obtaining an integrated scanned image considering a vertical dimension by reversing the first image matching groove so that an image of the first image matching groove is dimensionalized from the primarily scanned image, and obtaining a CT image through CT scanning of the upper and lower jaws.

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 invention discloses a tooth modeling method based on three-dimensional model retrieval. According to the method, three-dimensional retrieval technology is utilized for searching a teeth model with a dental crown which is similar with a to-be-modeled dental crown, and modeling is finished through three-point translation conversion registration, cutting and splicing. For reducing a workload in retrieval, the invention provides a teeth type identification method based on area segmentation, wherein area segmentation is performed through analyzing dental crown characteristic differences of different types of permanent teeth. Dental crown type identification and classification are realized according to a curved surface characteristic of the dental crown, thereby performing retrieval on different types of dental crowns. The teeth modeling method has advantages of simple operation and high modeling effect.

Present embodiments include composite dental materials for use in fillings and crowns, and methods of making the same. The composite materials can include biocompatible dental resin matrices and filler materials. The filler materials can include various types of magnetic nanoparticles. Additional embodiments include method of forming composite dental materials using a magnetic field and methods for forming aluminum oxide (Al2O3) nanoparticles. Other embodiments according to present teachings include methods for filling dental cavities and forming dental crowns.

The invention relates to a method for dyeing an all-zirconium tooth by using a film. The method comprises the following steps of: producing a polyethylene (PE) film with stronger autohension by taking polyethylene as a main raw material by a multi-layer extrusion process; and printing or print-coloring the film, shearing the colored film of which the size is matched with that of a precolored dental crown and wrapping on the surface of the dental crown, heating to ensure that coloring particles are transferred to the surface of the dental crown to be dyed, sintering, polishing, and glazing to finish the whole dyeing process and obtain a final restoration. The invention has the advantages that: the method is easy to operate, slightly affects the transparency of zirconia dental crowns, and can meet aesthetic requirements of customers on zirconia all-porcelain teeth more easily; the coloring mode is more flexible, and the targeted color printing can be performed according to the requirements of the customers; by the method, the color difference between dental crowns can be intuitively reflected immediately, and the problem that final colors of staining fluid products can be seen only after the staining fluid products are sintered is solved; and the phenomenon of porcelain fracture is avoided, and the safety factor is high.

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.

A dental implant adaptor which is particularly suitable for dental crown implantation using a screw-retained protocol has a hollow body that can be mounted on a dental implant. The body includes a crown-receiving portion on which a dental crown can be mounted. The portion has a distal end and a proximal end and includes a first anti-rotation formation to prevent rotation between the adaptor and the crown. The body also has a laterally projecting collar at the proximal end of the crown-receiving portion which, in use, locates on the implant. There is also a second anti-rotation formation shaped for non-rotational engagement with the implant. The crown-receiving portion and collar together have an overall axial length in the range 3.5 mm to 7 mm and the collar has an axial thickness of 1.5 mm or less. Another described is an implant assembly incorporating the adaptor.