712results 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.

To make a holding device appropriately hold an object to be cut.SOLUTION: A holding device 66 holds an object 5 to be cut. A posture of the holding device 66 in a state in which a first arm 101 and a second arm 102 of the holding device 66 extend in a first direction D2 is represented by a reference posture P1, and a position of the object 5 to be cut with respect to the holding device 66 when the other end 8b of the object 5 to be cut is brought into contact with the first arm 101 and the second arm 102 when the holding device 66 is in the reference posture P1 is represented by a reference position P10. A control device 150 of a cutting machine 100 includes: a first mounting rotation control part 161 for rotating the holding device 66 from the reference posture P1 so that the holding device 66 becomes an inclined posture P2, in a state in which the object 5 to be cut is not held by the holding device 66; and a second mounting rotation control part 165 for rotating the holding device 66 so that the holding device 66 becomes the reference posture P1 when the holding device 66 is in the inclined posture P2 and the object 5 to be cut is the reference position P10.SELECTED DRAWING: Figure 14

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.

A method for generating a virtual model of an object in a patient's anatomy. The method employs a surface scan of an anatomical region of the patient's oral cavity and a volumetric density scan of the anatomical region. The method includes receiving a first dataset of labeled surface scan segments, receiving a second dataset of labeled volumetric density scan segments, cross-mounting in a coordinate system, labeled surface scan segments from the first dataset to labeled volumetric density scan segments from the second dataset, receiving identification of the targeted extraction object, identifying the 3D volumetric density model and the 3D surface model associated with the volumetric density scan segment label, and generating a third dataset comprising and 3D model of a socket, a 3D model of portions of a tooth crown, a 3D model of portions of a target extraction tooth, and / or a 3D model of the extraction contour.

The invention discloses a dental implant fixator, and particularly relates to the technical field of dentistry, the dental implant fixator comprises an implant, an abutment and a connecting screw, the top of the implant is provided with a hexagonal hole, the abutment comprises a base body, the bottom of the base body is fixedly provided with a hexagonal block, the bottom of the hexagonal block is inserted into the hexagonal hole, and the connecting screw is connected with the hexagonal hole. And the connecting screw penetrates through the abutment and is in threaded connection with the implant. According to the dental implant fixator disclosed by the invention, the implant and the abutment are locked together in the mounting process of the connecting screw through the arranged anti-falling device, the implant and the abutment are prevented from loosening under the dual locking matching of the anti-falling component of the connecting screw, and meanwhile, the implant and the abutment are prevented from loosening due to the loosening of the connecting screw. The anti-loosening assembly is arranged outside the connecting screw, and the tooth socket matched with the anti-loosening assembly is arranged inside the implant, so that the connecting screw is prevented from loosening, and the connection stability between the abutment and the implant is further ensured.

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.

The present invention provides a zirconia composite sintered body that exhibits excellent machinability while possessing strength and translucency suited for dental use. The present invention relates to a zirconia composite sintered body comprising ZrO2, HfO2, a stabilizer capable of preventing a phase transformation of zirconia, and Nb2O5 and / or Ta2O5, wherein the total content of ZrO2 and HfO2 is 78 to 97.5 mol%, the content of the stabilizer is 1 to 12 mol%, and the total content of Nb2O5 and Ta2O5 is 1 to 9 mol% in total 100 mol% of ZrO2, HfO2, the stabilizer, Nb2O5, and Ta2O5, and the zirconia composite sintered body further comprises a Group I element, and TiO2.

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

Disclosed are an artificial dental crown and a method for manufacturing the same, which can provide a mechanical bonding force in the process of bonding an adhesive to an inner face. The disclosed artificial dental crown may comprise: a molded body which is inserted into and engaged with a prepared tooth and in which a coupling groove into which the prepared tooth is inserted is formed; and a plurality of pattern parts which are introduced and formed on the inner surface of the molded body at a certain depth in an inclined manner so as to be capable of accommodating an adhesive for bonding the molded body to the prepared teeth.

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.

Dental crowns having securing protrusions, methods of preparing said dental crowns, and methods of repairing a tooth with said dental crowns are described.

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.

The invention discloses a dental restoration combined accessory integrated manufacturing method and a dental restoration. The integrated manufacturing method comprises the following steps: acquiring 3D scanning data of an initial tooth arrangement form; designing an orthodontic treatment scheme for the patient, determining adopted accessories, and determining three-dimensional positions, shapes and sizes of the accessories on teeth; acquiring 3D scanning data of the tooth arrangement form of the body; according to the initial tooth arrangement form and the body tooth arrangement form, a temporary tooth restoration is designed, an integrated accessory is designed on the temporary tooth restoration according to a pre-made orthodontic treatment scheme, and then a temporary tooth restoration entity is manufactured. According to the integrated manufacturing method of the dental restoration and the accessory and the dental restoration, the temporary dental restoration combined with the accessory is integrally manufactured.

Disclosed are a dental crown of a dental implant and a dental implant thereof. The dental crown of the dental implant includes a dental crown body. An occlusal side groove is reserved in the top of the dental crown body, an interocclusal space is reserved between a groove bottom adjacent wall of the occlusal side groove and an opposing tooth, the reserved occlusal side groove is used for the filling of photosensitive resin, and the photosensitive resin is used for making contact with the opposing tooth.

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.

To disclose an artificial crown having a structure of providing a mechanical bonding force in a process of attaching cement to an inner surface, and a manufacturing method of the artificial crown.SOLUTION: An artificial crown according to the present invention includes: a molded body 10 inserted and attached to an abutment tooth and having a connection groove 10a to be inserted to the abutment tooth formed therein; and a plurality of pattern parts 20 formed so as to be inclined by a predetermined depth and drawn in an inner surface of the molded body so as to accommodate an adhesive for joining the molded body to the abutment tooth.SELECTED DRAWING: Figure 2

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).

The present invention manufactures a hardened body having excellent strength, water resistance and uniformity. The method for manufacturing a polyurethane composite material of the present invention comprises: an addition polymerization step, in which a polyurethane component (A) having a number average molecular weight of 1500 to 5000 is formed by performing an addition polymerization in a first raw material composition comprising a free radical polymerizable monomer (B) which does not undergo an addition polymerization reaction with a free radical polymerizable diol compound (a1) and a diisocyanate compound (a2); a second raw material composition preparation step, in which a second raw material composition comprising a component (A), a component (B), a free radical polymerization initiator and a filler is prepared; and a free radical polymerization step, in which, after completing the addition polymerization step and the second raw material composition preparation step, the second raw material composition is used for free radical polymerization, wherein the ratio (R) represented by the following formula (1) is 20 wt % to 80 wt %, where R=100×B / [a1+a2+A+B], wherein (a1), (a2), (A) and (B) are the contents (parts by mass) of the components (a1), (a2), (A) and (B) in the second raw material composition.

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