179results about "Tooth crowns" patented technology

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.

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 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

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

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.

An assembly comprising an abutment and gingival healing cuff. The gingival healing cuff fits over the abutment, wherein the cuff includes internal surfaces (e.g., at least one flat face, and at least one curved face) corresponding to the external surfaces of the abutment, so as to mate with one another. The gingival healing cuff can further include a rectangular box or other timing alignment structure positioned apical to a buccal alignment body, which serves as a buccal alignment marker once the buccal alignment body is removed, and which can aid in helping the practitioner know where the implant platform and abutment platform are located (even when hidden). Flowable composite, e.g., of a different color, can be placed into the rectangular box or other timing alignment structure to aid in identification of the buccal surface of the cuff and proper rotational alignment ("timing") of the abutment with the implant.

The invention relates to a process of producing a dental zirconia article, the process comprising the steps of processing a radiation-curable zirconia sol A as construction material in an additive-manufacturing process comprising a radiation-curing step to obtain a zirconia gel article, the zirconia gel article having the shape of a dental article with an outer and an inner surface, applying a radiation-curable zirconia sol Bx on at least a portion of the outer surface of the zirconia gel article,radiation-curing the radiation-curable zirconia sol Bx of step (b), transforming the zirconia gel article into a zirconia aerogel article, the radiation-curable zirconia sol A being same or different from the radiation-curable zirconia sol Bx with respect to chemical composition and / or physical properties. The invention also relates to a dental ceramic zirconia article obtainable by the process described in any of the proceeding claims.

The present invention relates to a novel dental prosthetic material and a patient-customized dental prosthesis comprising same, the material improving water resistance, reproducing a color similar to an actual tooth, and thus improving the aesthetic appearance even after prosthetic treatment. In addition, patient-customized prosthetic treatment can be performed using a 3D printer on a tooth requiring prosthetic treatment. The material exhibits enhanced physical properties compared to existing photocurable resin compositions and has excellent adhesive strength, thereby preventing a dental prosthesis from detaching after treatment.

Provided is a zirconia sintered body with which both transparency and fracture toughness value can be achieved at high levels and which can be easily manufactured even by pressureless sintering. In this sintered body, the percentage content of Y2O3 in the whole composition is 1.7-2.9 mol%, the area average particle diameter of zirconia crystal particles is 0.6-1.1 μm, the area ratio of a first region composed of zirconia crystal particles having a particle diameter of 0.1 or more and less than 0.8 μm is 10-80%, the area ratio of a second region composed of zirconia crystal particles having a particle diameter of 0.8-3.2 μm is 20-90%, the average Y2O3 concentration C2 of zirconia crystal particles forming the second region is 2.0-3.2 mol%, the average Y2O3 concentration C1 of zirconia crystal particles forming the first region is 1.7-2.3 mol%, and when the difference in Y2O3 concentration is defined as ΔC≡C2-C1, the ΔC / C2 value is 0.1-0.5, the fracture toughness value of the sintered body measured by the IF method is 10.5 MPa·m0.5 or more, and the total light transmittance of the sintered body is 40% or more.

A custom tool for forming a dental restoration in a mouth of a patient includes a one-piece mold body providing for a customized fit with at least one tooth of the patient, the one-piece mold body including an occlusal portion forming an occlusal surface corresponding with an occlusal surface of the tooth, a mesial proximal portion forming a mesial proximal surface corresponding with a mesial proximal surface of the tooth, and a distal proximal portion forming a distal proximal surface corresponding with a distal proximal surface of the tooth. The mold body is configured to combine with the tooth of the patient to form a mold cavity encompassing missing tooth structure of the tooth. The occlusal portion, the mesial proximal portion, and the distal proximal portion are based on three-dimensional scan data of the mouth of the patient.

A method for treating an artificial bone implant with blood, according to the method bone material is placed in a container configured to be filled with blood, wherein the container comprises an opening and a cover configured to cover the opening of the container and a fixed separator that separates a bottom part and an upper part. The separator is provided with holes so that when the container is filled with whole blood, the blood in the bottom part is in full contact with the blood in the upper part, and wherein the bone material is in the upper part, on top of the separator.

The present disclosure relates to computer-aided dental restoration system that is configured to estimate crown pose and representing virtual crown in 3D model. The system obtains 3D model of dentition of the patient. The system segments 3D model to obtain segmented tooth data and generates encoded 3D model representation suitable for processing by trained neural network. The method for generating encoded 3D model representation comprises subsampling point cloud representation based on segmented tooth data, determining surface normal representation, retrieving dental notation of restorative site, encoding each of plurality of points with corresponding surface normal representation and with value relative to restorative site to produce encoded 3D model representation, inputting encoded 3D model representation into trained neural network, and producing output, using trained neural network, wherein output includes prediction of translation of each point of encoded 3D model representation into positions corresponding to crown pose.

The invention concerns a dental restoration system (1) for restoring a tooth at least during healing of an implant construction (5) being set into a jaw of a patient, comprising a crown abutment (3) configured to be positioned on a gingiva former (4) mounted to the implant construction (5), and a locking member (2) having a contact face (212) and a fixing structure (24) configured to be fixed to the gingiva former (4), wherein the crown abutment (3) has a through hole (31) configured to receive the locking member (2) such that the contact face (212) of the locking member (2) contacts the crown abutment (3) and the fixing structure (24) at least partially extends out of the crown abutment (3), and the crown abutment (3) is made of an abutment material configured to bond with a crown material used to build a crown (6).

A method of producing a dental restoration (100), including the steps of calculating (S101) a pressure distribution (101) on the oral mucosa (105) through the dental restoration (100) based on a three-dimensional data set (103-DS) of the dental restoration (100) and a three-dimensional data set (103-MS) of the oral mucosa (105); and determining (S102) a spatial region (107) for an elastic production material (109) within the dental restoration (100) based on the calculated pressure distribution (101).

To provide a dental prosthesis capable of improving wearing feeling, and reducing pain and discomfort when wearing the dental prosthesis.SOLUTION: A manufacturing method of a dental prosthesis has the steps of: calculating a pressure distribution 101 to an oral mucosa by the dental prosthesis 100 based on a three-dimensional data set of the dental prosthesis 100 and a three-dimensional data set of the oral mucosa 105; and determining a space area 107 for elastic manufacturing material 109 inside the dental prosthesis based on the calculated pressure distribution.SELECTED DRAWING: Figure 3

The method for creating a digital 3D model of a patient's dentition according to the present invention comprises, in a computing unit, generating a digital 3D model of a plurality of dentition variations, each of which comprises a combination of a digital 3D model of the patient's upper jaw and a digital 3D model of the patient's lower jaw, the plurality of dentition variations differing from one another in the relative positioning of the upper and lower jaws, respectively: - a digital 3D model of the patient's maxilla is combined with a digital 3D model of the mandible such that the maxilla and mandible rest on top of each other at several contact points without any spatial overlap of parts of the maxilla and mandible; - The contact surfaces between the upper and lower jaws are determined, This results in an optimized denture variation being selected for the 3D model of the denture, taking into account the contact surfaces.

To provide a method for producing a resin material for dental cutting work that is less likely to cause bubbles or cracks even if it contains fibers. [Solution] The process includes the steps of placing a fiber sheet inside a mold formed from a material other than metal and equipped with a means for equalizing the pressure inside and outside, and injecting unhardened resin material into the inside of the mold, or injecting unhardened resin material mixed with fibers into the inside of the mold, placing the mold in a container that can apply a predetermined pressure to the entire mold, pressurizing it to 1.0 MPa or more, and heating it to 60°C or more.

Methods and systems are described for automatically generating a crown shape of a dentition, where the method comprises: segmenting 3D maxillofacial data comprising a dentition into a set of 3D dental objects, preferably by one or more trained deep neural networks; preferably, based on a tooth classifier, determining or receiving the position of a tooth of which the target dental crown shape is to be determined in the dentition; determining a 3D spatial constraint for the target crown shape based on the set of 3D dental objects; determining an initial pose of the target dental crown shape based on one or more 3D dental objects in the set of 3D dental objects; and optimizing one or more optimization parameters associated with the digital crown shape model to determine a target crown shape, the optimizing including determining a trial crown shape using the digital crown shape model and the one or more optimization parameters, calculating a loss value for the trial crown shape based on the 3D spatial constraints and the initial pose, and if the loss value does not satisfy the one or more optimization conditions, modifying the one or more optimization parameters to determine a further test crown shape and calculate a further loss value.

The invention relates to a method for determining a preparation surface of a tooth for preparing the tooth for receiving a dental restoration element. The method comprises receiving a three-dimensional digital tooth model, a three-dimensional digital restorative tooth model, a definition of a restoration area, a first value selected for a basic preparation depth of the preparation, and a second value selected for a restoration thickness of the dental restoration element. The method further comprises determining a first reference surface using the selected first value, determining a second reference surface using the selected second value, determining one or more preparation reference surface sections using the first and second reference surface, and determining the preparation surface of the tooth using the determined one or more preparation reference surface sections.

To provide a method of manufacturing a dental prosthesis and a manufacturing apparatus for manufacturing a dental prosthesis.SOLUTION: A method of manufacturing a dental prosthesis includes: step S101 of determining a first space area of a dental prosthesis that is exposed to a high load in comparison with a second space area of the dental prosthesis; and step S102 of manufacturing a dental prosthesis having a manufacturing material inside the first space area, the manufacturing material being different from that inside the second space area. The first space area is determined such that an internal pressure exceeding a given numerical value exists in the first space area.SELECTED DRAWING: Figure 3

A dental material according to the disclosure contains zinc-supporting zirconium phosphate in which zinc ions are supported on zirconium phosphate.

The present invention relates to a computer-implemented method for customizing an initial restoration design (1) by a specific user, wherein the initial restoration design (1) is received; wherein a digital 3D model (2) of the dental situation of a patient is received. The method further comprises: a first artificial neural network for machine learning adds a generic offset (3) to each region of the initial restoration design (1) taking into account the digital 3D model (2), and outputs the result to a second artificial neural network for machine learning; the second artificial neural network for machine learning adds a user-specific offset (4) to each region of the output of the first artificial neural network taking into account the 3D digital model (2), and outputs the result to a specific user; wherein the specific user, using CAD tools, revises via a display unit the output of the second artificial neural network taking into account the 3D digital model (2) to produce a final restoration design (5); wherein the first artificial neural network is trained using a first training data set, the first training data set including the initial restoration designs (1), the 3D digital models (2), and the final restoration designs (5) produced by at least other users; and wherein the second artificial neural network is trained using a second training data set, the second training data set including initial restoration designs (1), the digital 3D models (2), and final restoration designs (5) produced by the specific user only.

To provide a dental block material using a thermoplastic resin that is easy to process with CAD / CAM and has sufficient hardness for use as a CAD / CAM processed product. [Solution] The dental block material according to the present invention is made of a thermoplastic resin having a Vickers hardness of 20HV0.2 to 35HV0.2 as defined in JIS Z 2244, a flexural strength of 150MPa to 250MPa and a flexural modulus of 2 to 10GPa as defined in JIS T 6517:2011.

An optical coherence tomography image generation device (1) comprises: a three-dimensional tooth information measuring means (3) for measuring a tooth surface shape and a tooth interior as three-dimensional tooth information through optical interferometry by irradiating a tooth (8) with measurement laser light, and for displaying, on a display device (6), a tooth image obtained by visualizing the three-dimensional tooth information; a laser cutting means (5) for cutting the tooth by irradiating the tooth with cutting laser light; a two-dimensional scanning mechanism (41) that two-dimensionally scans laser light, which is the measurement laser light and / or the cutting laser light; a probe (4) that includes the two-dimensional scanning mechanism (41) and that outputs, from a distal end thereof, the laser light having passed through the two-dimensional scanning mechanism (41); and an optical path coaxially arranging means (40) for coaxially arranging the optical path of the measurement laser light entering the two-dimensional scanning mechanism (41) and the optical path of the cutting laser light entering the two-dimensional scanning mechanism (41).

The application discloses a kind of generation methods of dental preparation grinding path, it is related to dental prosthetic field, including obtaining to-be-ground tooth point cloud model, preparation body point cloud model;To-be-ground tooth point cloud model is aligned with preparation body point cloud model;Preparation body point cloud model is inflated, and preparation body point cloud model after inflation is obtained;Based on preparation body point cloud model after inflation and to-be-ground tooth point cloud model, extract path reference area, denoising;Path reference area is divided into closed loop area, open loop area;Closed loop area grinding path is generated;Open loop area grinding path is generated;Open loop area grinding path is added after closed loop area grinding path, and dental preparation grinding path is obtained.The application is used to solve the problem that the grinding path planning for dental preparation in the prior art depends on the subjective experience of the attending physician, lacks automated and standardized path planning method, to achieve the purpose of providing a standardized path generation method for automated dental preparation operation.

Provided are a mill blank that has a section to be cut which is formed of a hybrid resin (HR) and makes it possible to produce, regardless of the shape, a dental prosthesis that faithfully reproduces the gradation of natural teeth, and can obtain a natural three-dimensional effect after treatment. For example, two types of HR raw material compositions giving the HR of colors A and B having a color difference of 5-20 are filled in a mold while appropriately mixing the HR raw material compositions using a two-liquid mixing dispenser with a position control mechanism and then cured. Thus, five to nine color units (CUs), which are regions having a predetermined thickness and exhibiting an identical color appearance, are connected in the height direction without forming a laminated interface, and thus, the color appearance is gradationally changed in the height direction. Furthermore, the colors of the tip section and the base end section are A and B, respectively, and the color of the intermediate section is a color between A and B. In addition, the mill blank comprises a section to be cut having a gradation structure in which the color difference between adjacent CUs in the intermediate section is 1-7.

Provided are: a dental ceramic material composition which does not require a skilled technique, and which is capable of imparting a ceramic material layer having excellent appearance after firing while suppressing drips during technician operation and sink marks after firing; a method for producing the dental ceramic material composition; a method for producing a dental prosthesis device; and a kit for the dental ceramic material composition. This dental ceramic material composition contains glass (A) and an organic solvent (B) having a boiling point of 100-300 DEG C. The glass (A) contains a base glass (A-1) having a particle diameter (D50) of 2-8 [mu] m and a base glass (A-2) having a particle diameter (D50) of 25-45 [mu] m, and the particle diameters of the glass (A) satisfy D10 < = 5 [mu] m, 5 [mu] m < D50 < 28 [mu] m, and 28 [mu] m < = D90.