551results about "Tooth crowns" patented technology

The present invention provides a method for producing a dental restoration for preferably at least a part of at least one tooth. The method comprises the step of obtaining design data, wherein the design data includes acquired data and preliminary design data of the dental restoration. The method further comprises the step of modifying the preliminary design data before at least one manufacturing step to obtain modified design data and producing the dental restoration based on the modified design data.

The invention discloses a high-precision and automatic dental crown generation method. The method comprises seven steps of oral cavity three-dimensional data acquisition, full-mouth tooth semantic segmentation, upper and lower jaw point cloud precise registration, abutment and associated gingiva precise segmentation and trimming, abutment surrounding environment multi-tissue segmentation, neck-edge line secondary precise detection, and dental crown generation and multi-dimensional refinement. The method comprises the steps of oral cavity three-dimensional data acquisition, full-mouth tooth semantic segmentation, upper and lower jaw point cloud precise registration, abutment and associated gingiva precise segmentation and trimming, abutment surrounding environment multi-tissue segmentation, neck-edge line secondary precise detection and dental crown generation. Through combination of deep learning and a point cloud algorithm, high-precision segmentation of teeth and gingiva and precise reduction of an occlusion relationship are realized, an oral anatomical feature library and a clinical repair standard are fused, and through multi-dimensional fine adjustment optimization, a dental crown 3D model which is high in fitting degree, harmonious in occlusion and capable of meeting clinical requirements is generated. The method is full-process automatic, greatly improves efficiency, reduces operation threshold, reduces material waste and diagnosis and treatment cost, remarkably improves repair success rate, and is suitable for various oral repair scenes.

A method for manufacturing a lithium disilicate glass ceramic with gradient properties by using photocuring additive manufacturing, the method comprising: performing wet mixing on a basic glass powder with a solvent, ball milling same until uniformity, drying same, then performing thermal treatment to reach a molten state, then quenching same to form original particles, and then granulating same to obtain lithium disilicate ceramic particles; respectively preparing n groups of pastes with gradually-changing colors and translucencies from n groups of the lithium disilicate ceramic particles, said paste preparation comprising: adding 3Y-TZP powder, a coloring agent and lithium disilicate ceramic particles to a resin mixture, mixing same, rolling same and performing vacuum defoaming to obtain a paste; adding the n groups of pastes in sequence into an additive manufacturing device to undergo photocuring forming, so as to obtain a green body; after the green body is cleaned and dried, degreasing the green body, and sintering same; and finally under a vacuum high-temperature condition, subjecting the sintered sample to an ion exchange reaction with a molten nitrate in a flowing state, so as to obtain a product.

The invention relates to the technical field of dental crown manufacturing, in particular to an artificial intelligence-based medullary space retention crown manufacturing method and system, and the artificial intelligence-based medullary space retention crown manufacturing method comprises the following steps: obtaining an oral cavity CBCT image and a mouth scanning model; synthesizing the oral cavity CBCT image and the oral scanning model into a synthetic model; inputting the synthetic model into the trained AI model, and generating a medullary space retention crown model by the AI model based on the synthetic model; performing a stress simulation test on the medullary space retention crown model, and regenerating the medullary space retention crown model when the stress of any region of the medullary space retention crown model is greater than a preset value; performing a simulation try-on test on the medullary space retention crown model qualified in the simulation stress test; adjusting the medullary space retention crown model according to the result of the simulation try-on test; inputting the adjusted medullary space retention crown model into a printing device, and printing to generate a semi-finished medullary space retention crown; and curing the semi-finished medullary space retention crown to generate a finished medullary space retention crown. The patient experience is improved.

A system can be configured to record a position and orientation of a dental component. The system can include a coping and a replica. The coping can include an anti / rotational feature that is configured to mate with an anti-rotational feature of a dental component. The coping can also include an orientation feature that is configured to convey the orientation of the dental component. The replica can include a first anti-rotational feature that corresponds to the anti-rotational feature of the dental component. The replica can also include a second anti-rotational feature that does not correspond to the anti-rotational feature of the dental component.

A system for fabricating a dental restoration to restore a tooth at a restoration site in a dentition of a patient is disclosed. The dentition includes a restoration dental arch and an opposing dental arch. The restoration dental arch includes the restoration site and the opposing dental arch is opposite the restoration dental arch. The system includes an impression apparatus, a motion capture apparatus, an interface apparatus, and a restoration design system. The impression apparatus is configured to capture an impression of the dentition of the patient. The motion capture apparatus is configured to capture a plurality of location data points that represent the locations of the opposing dental arch relative to the restoration dental arch. The interference model generation system is configured to generate an interference model for the restoration site. The restoration design system is for designing a restoration using the interference model.

The present invention provides a zirconia composite sintered body which has suitable strength for dental use, which has excellent mechanical workability in a sintered body state, and which has excellent aesthetic properties. The present invention relates to a zirconia composite sintered body comprising: zirconia; a stabilizer which is capable of suppressing a phase transition of the zirconia; and Nb2O5 and / or Ta2O5, said zirconia composite sintered body comprising a plurality of layers which differ in terms of the content of at least one component from among the stabilizer, the Nb2O5, and the Ta2O5, with respect to the total amount, in moles, of the zirconia, the stabilizer, the Nb2O5 and the Ta2O5.

The present invention provides: a zirconia composite sintered body that can be machined and exhibits exceptional adhesiveness without sandblasting being performed after machining; and a dental preservation repair kit including the zirconia composite sintered body. The present invention relates to a dental zirconia composite sintered body containing monoclinic zirconia, the abundance ratio fm of monoclinic systems represented by formula (1) being higher than 10% and not higher than 60%.　Formula (1): fm = I28 / (I28 + I30) × 100 (In the formula, fm represents the abundance ratio (%) of monoclinic systems, I28 represents the area intensity of a peak around 2θ = 28° where a monoclinic main peak appears in XRD measurement, and I30 represents the area intensity of a peak around 2θ = 30° where a tetragonal or cubic main peak appears in XRD measurement).

In some implementations, one or more processors may receive three-dimensional (3D) scan data of a supragingival tooth structure of a patient. The one or more processors may design a dental restoration tool based on the 3D scan data of the supragingival tooth structure of the patient. The dental restoration tool may include a one-piece matrix including a facial matrix portion, a lingual matrix portion, and an integral hinge portion pivotably coupling, about an occlusal-gingival- extending axis, the facial matrix portion to the lingual matrix portion. The one-piece matrix may be configured to close, via the integral hinge portion, to form a mold cavity that encompasses one or more teeth of the patient during a dental restoration process.

To provide a dental medical member exhibiting superior adhesive strength, and a method for producing the dental medical member.SOLUTION: A dental medical member comprises a zirconia (Zr) material as a substrate, where the substrate includes an ion implantation region with implanted silicon (Si) or phosphorus (P) ions, and where the ion implantation level within 20 nm from the surface is 2×1012 ions / cm2 or more. A method for producing a dental medical member includes a step of implanting silicon (Si) or phosphorus (P) ions into a substrate composed of a zirconia (Zr) material to form an ion implantation region, where the ion implantation level within 20 nm from the surface is 2×1012 ions / cm2 or more.SELECTED DRAWING: Figure 6

Embodiments of the present invention provide a method, system, devices and software which provide customized, clinically relevant designs, e.g. treatment plans / solutions for at least single tooth replacement therapy in real-time as needed to enable immediate confirmation of the validity and execution of patient-specific treatment solutions.A Machine Learning algorithm is used in a method or system for computer implementation of automatic restoration design. The restoration design includes the design of restorative elements such as crowns and abutments. Software is provided for carrying out the methods when executed on a digital processor. Manufacturing of the restorative elements is also included.

A method of providing repair decision support for a dental patient includes: receiving image data of an interior of an oral cavity of the patient, the image data corresponding to one or more imaging modes; deriving a plurality of parameters from the image data; applying the decision model to the plurality of parameters; and generating a repair decision recommendation based on the output of the decision model.

There is provided a layered body that has gradations in translucency and color allowing the layered body to give an impression similar to that of natural teeth and with which the chipping of the surface layer (layer closer to the incisal edge of the dental restoration) can be reduced.The layered body comprises a surface layer containing zirconia containing at least one stabilizing element and a composition-gradient layer composed of two or more unit layers. The unit layers each contain at least one coloring element and zirconia containing at least one stabilizing element, and the composition-gradient layer is constructed as a result of the unit layers being stacked in such a manner that the amount of the stabilizing element in the zirconia containing at least one stabilizing element contained in the composition-gradient layer remains unchanged or decreases from the surface layer toward the surface of the layered body opposite the surface layer. The amount of the stabilizing element in the zirconia containing at least one stabilizing element contained in the surface layer is smaller than the amount of the stabilizing element in the zirconia containing at least one stabilizing element contained in a first composition-gradient layer, which is one of the unit layers constituting the composition-gradient layer and is adjacent to the surface layer.

The present invention relates to a hardenable composition for use in a process of treating a dental condition in a patient's oral cavity, comprising: radiation-curable component(s); photoinitiator(s), wherein the photoinitiator exhibits absorption in the UV light region and absorption in the visible light region, wherein the absorption in the UV light region is stronger than the absorption in the visible light region; optionally filler(s); and optionally additive(s), wherein the process comprises the steps of layer-by-layer additive manufacturing of a dental or orthodontic article using radiation having a wavelength in the UV light region; attaching the dental or orthodontic article to a surface of dental hard tissue or dental material; and applying radiation having a wavelength in the visible light region to the dental or orthodontic article.

Provided is at least one of a recycled powder obtained through horizontal recycling of scrap from dental blanks, a method for producing the recycled powder, a method for producing a recycled dental blank, and a recycled dental blank obtained by the method.　This method for producing a recycled powder comprises: a pulverization step for pulverizing scrap from dental blanks to obtain a pulverized product; and a recovery step for recovering a powder having a color tone where L* is 90-100 inclusive, a* is 0-1 inclusive, and b* is 0-5 inclusive from the pulverized product.

To provide a polyurethane-based composite material in which fillers are dispersed in a matrix composed of a polyurethane-based resin having a content of a polyurethane component of more than 80 mass% and having a crosslinked structure, and which is uniform and excellent in strength and water resistance, and to provide a method of producing the molded article.SOLUTION: A diisocyanate (a2) is added to a first raw material composition containing a radically polymerizable diol (a1), a non-polyaddition-type radically polymerizable monomer (B), a thermal polymerization initiator (C) having a 10 hour half-life temperature: T10 of 60°C or more and a filler (D) to obtain a radically polymerizable group-containing polyurethane component (A) having a number average molecular weight of 1500 to 5000, which is a polyadduct of (a1) and (a2). A second raw material composition containing the radically polymerizable group-containing polyurethane component (A) content ratio of which is more than 80 mass% in the organic component is prepared and is filled in a mold in a state where the composition is maintained at a temperature of 40 to (T10-15)°C, and is subsequently cured by radical polymerization at (T10-10) to (T10+25)°C.SELECTED DRAWING: None

The present invention provides a dental curable composition and a dental prosthesis therewith with which shade changes in the base material can be reduced, and that exhibit excellent gloss retention in the cured product while demonstrating excellence in operability. The present invention relates to a dental curable composition comprising a polymerizable compound (A), a polyfunctional thiol (B) having two or more mercapto groups per molecule, a polysiloxane (C), and a polymerization initiator (D).

Provide a set of chemicals for the production of ceramic dispersions or ceramic gels. The present invention relates to a set of chemicals for the production of ceramic dispersions or ceramic gels, a manufacturing process for ceramic molded parts, and ceramic molded parts manufactured by this process.

To provide a facing crown capable of making the strength of an upper jaw front tooth equal to the occlusal force of a molar, and a wax cover capable of efficiently shaping a wax pattern formed in the process of manufacturing the facing crown.SOLUTION: A facing crown 30 to be attached to an upper jaw front tooth 11 is provided with a metal frame 32, and a step part 34 with which the top part of a lower jaw front tooth 21 is brought into contact is formed on the tongue side of the metal frame 32 when attached to the oral cavity. In a wax cover 40 used when the facing crown 30 is manufactured, a molding stepped part 45 having a shape similar to the shape of a stepped part 34 of the metal frame 32 is formed in a cutting edge part 44 of the wax cover 40.SELECTED DRAWING: Figure 1

To provide a method and apparatus of producing a dental restoration by jet-printing using a three-dimensional printing method, enabling the ceramic dental restoration to be produced with a natural appearance and faithful reproduction of the original color.SOLUTION: A method of producing a dental restoration by jet-printing, includes the steps of jet-printing (S101) a dentin core of the dental restoration using a plurality of opaque ceramic slurries having different colors from each other, and jet-printing (S102) the tooth enamel of the dental restoration using a translucent ceramic slurry.SELECTED DRAWING: Figure 4

To provide a production method of a sintered body that can obtain a sintered body satisfying light transmissivity required as a dental prosthetic material by short time sintering without essentially requiring precise temperature control at a high temperature region and without depending on a content of a stabilization element of a zirconia composition.SOLUTION: A production method of a zirconia sintered body containing a stabilization element comprises: a first temperature rising step for rising temperature of a zirconia composition containing the stabilization element from a temperature rising start temperature up to a first arrival temperature between 800°C or higher and lower than 1400°C with a rate of temperature increase of 150°C / minute or more; a second temperature rising step for rising the temperature from the first arrival temperature up to a second arrival temperature between 1400°C or higher and lower than 1580°C with a rate of temperature increase of over 30°C / minute and less than 200°C / minute; and a holding step for holding the temperature at the second arrival temperature.SELECTED DRAWING: None

The invention relates to a dental ceramic coloring liquid with shielding property. The present invention provides a dental ceramic coloring liquid which is capable of suppressing a decrease in mechanical strength of a dental ceramic after sintering, has good storage stability, and is capable of imparting shielding properties. The present invention relates to a dental ceramic coloring liquid comprising an organosilicon compound. The organosilicon compound is preferably hydrophilic. The organosilicon compound is preferably a silicone compound. The organosilicon compound is preferably an alkylsilane compound.

The present invention provides an unfired zirconia composite and a dental mill blank, with which a dental prosthesis can be manufactured with a single sintering operation without a pre-sintering operation and which have appropriate strength to withstand machining. The present invention pertains to: an unfired zirconia composite composed of an unfired zirconia molded body and a resin, wherein the resin is embedded in the unfired zirconia molded body; and a dental mill blank including said unfired zirconia composite.

To provide a liquid material which can only adjust transparency by applying on a part of a zirconia crown having high transparency, without coloring. The present invention provides an opaque imparting liquid used for a prosthesis device cut and machined from a dental zirconia for cutting and machining, comprising; (a) 10 to 39 wt.% of a water-soluble aluminum compound and / or a water-soluble lanthanum compound, (b) 60 to 89 wt.% of water, and (c) 1 to 20 wt.% of an organic solvent.

To provide a cutting machine which is excellent in run-out accuracy of a cutting tool gripped by a gripping part of a spindle.SOLUTION: A cutting machine 10 includes a tool stocker 80 for storing a cutting tool 6, a cutting device 50 having a spindle 51 having a gripping part 53 for gripping an apex 6T of the cutting tool 6, and a control device 100, wherein the tool stocker 80 includes a pressing member 82 to which a tip 6B of the cutting tool 6 is pressed, the control device 100 includes a temporary gripping part 108 for inserting the apex 6T of the cutting tool 6 into the gripping part 53 by a first length L1, then closing the gripping part 53, and temporarily gripping the cutting tool 6, and a final gripping part 109 for inserting the apex 6T of the cutting tool 6 into the gripping part 53 in a state where the tip 6B of the cutting tool 6 is pressed to the pressing member 82 by a second length L2 longer than the first length L1, then closing the gripping part 53 and finally gripping the cutting tool 6.SELECTED DRAWING: Figure 15

Disclosed are systems and methods for a computerized framework for automated ceramic inkjet printing in dental restoration manufacturing. The disclosed ceramic inkjet mesh printing for dental restorations combines precision digital control with ceramic materials to create highly accurate and aesthetically pleasing dental prosthetics. The disclosed mechanisms utilize specialized printheads designed to deposit precise amounts of ceramic materials onto dental substrates, enabling the creation of detailed color gradients and natural-looking surfaces that closely mimic natural teeth.

To provide at least one of recycled powder obtained by horizontal recycling of dental blank scraps, manufacturing method thereof, manufacturing method of recycled dental blanks, and recycled dental blanks obtained thereby.SOLUTION: A manufacturing method of recycled powder includes: a pulverization step of pulverizing dental blank scraps to obtain a pulverized product; and a recovery step of recovering, from the pulverized product, powder having a color tone of L* of 90 or more and 100 or less, a* of 0 or more and 1 or less, and b* of 0 or more and 5 or less.SELECTED DRAWING: Figure 1

The present invention relates to a method for constructing a dental restoration, comprising the steps of providing (S101) a three-dimensional data set that specifies the spatial shape of the dental restoration and a spatial distribution of at least one manufacturing material within the dental restoration; simulating (S102) a spatial stress distribution within the dental restoration under a predetermined load based on the three-dimensional data set; and modifying (S103) the three-dimensional data set based on the simulated stress distribution.

The invention relates to a method for determining an internal structure (30) of an artificial tooth (24). The method includes acquiring outer shell data describing an outer shell (28) of the artificial tooth (24). First reference geometry information is also defined or acquired. This information describes a first reference geometry (B1) that divides the outer shell (28) of the artificial tooth (24) into a first shell portion (28a) and a second shell portion (28b). Furthermore, a first compressive strain shell (32) is produced by virtual compressive strain on the first shell portion (28a) in one direction with respect to the first reference geometry (B1). At least one sub-volume (34, 36) of the artificial tooth (24) is also derived, said sub-volume being delimited by the first compressive strain shell layer (32). The invention also relates to a method for producing an artificial tooth (24) having a predetermined shell layer (28). The invention also relates to an artificial tooth (24), a data processing device, a computer program and a computer readable medium.

Dental restoration technologies include dental prosthesis components such as implants, abutments, crowns, and the like that are mapped to a patient's mouth prior to and during installation. Fabricating at least a portion of one or more components of the dental prosthesis using a fully calibrated and characterized fabricator can reduce sources of error that affect the success of fabrication and installation processes. The components of the dental prosthesis are represented by library files that are tailored to reflect particular characteristics of the components of the prosthesis to be fabricated, the fabricator, the material used during fabrication, and / or the environment surrounding the fabricator. The library files may be determined based on an acquired scan of the patient and / or based on inputs received from a user during the design process. The library files may be generated using virtual modeling techniques, and / or based on a component design that falls within pre-determined parameters.