3321results about "Impression caps" patented technology

The invention relates to a zirconia-based all-ceramic false tooth and a preparation method thereof. A core layer of the zirconia-based all-ceramic false tooth is prepared from the following components in parts by mass: 90 to 94 parts of ZrO2, 5 to 9 parts of Y2O3, 0.1 to 0.5 part of Al2O3, 0.01 to 0.5 part of Fe2O3, 0.01 to 0.5 part of Er2O3 and 0 to 0.2 part of MnO2, and a shell layer of the zirconia-based all-ceramic false tooth is prepared from the following components in parts by mass: 24.5 to 49.5 parts of CaCO3, 45 to 50 parts of SiO2, 0 to 25 parts of MgO, 0.01 to 0.5 part of Fe2O3, 0.01 to 0.5 part of Er2O3 and 0 to 0.2 part of MnO2. The preparation process comprises the following steps: performing dry pressing and isostatic pressing on raw materials of the core layer, presintering, and carving to obtain a zirconia-based false tooth biscuit; meanwhile, calcining raw materials of a shell layer, then adding deionized water, a dispersing agent and an adhesive, and carrying out ball milling and mixing to obtain calcium-magnesium-silicon-based ceramic slurry; and coating the calcium-magnesium-silicon-based ceramic slurry on the surface of the zirconium oxide-based false tooth biscuit, and sintering to obtain the zirconium oxide-based all-ceramic false tooth provided by the invention. The zirconia-based all-ceramic false tooth has good jade texture and is closer to the natural color of natural teeth.

A method for assessing the shape of an orthodontic aligner, said method comprising the following steps:a″) acquisition of at least one image at least partially representing the aligner in a service position in which it is worn by a patient, called “analysis image”;b″) analysis of the analysis image by means of a deep learning device, preferably a neural network, trained by means of a learning base, so as to determine a value for at least one tooth attribute of an “analysis tooth zone” representing, at least partially, a tooth on said analysis image, the tooth attribute relating to a separation between the tooth represented by the analysis tooth zone, and the aligner represented on the analysis image, and / orfor an image attribute of the analysis image, the image attribute relating to a separation between at least one tooth represented on the analysis image, and the aligner represented on said analysis image.

The invention discloses a data processing method and system for a dental three-dimensional model, and relates to the technical field of dental three-dimensional modeling, and the method comprises the steps: obtaining initial data of oral cavity scanning, recognizing a tooth type in the initial data, and determining a corresponding tooth surface reflection parameter according to the tooth type; generating scanning parameter combinations for different tooth positions according to the tooth surface reflection parameters and the tooth anatomical structure; tooth point cloud data are collected, and a tooth enamel reflective area and a shadow shielding area are identified; performing light reflection removal processing on the enamel light reflection area, performing data completion on the shadow shielding area, and generating corrected tooth point cloud data; and performing registration fusion on the corrected tooth point cloud data to generate a dental three-dimensional model containing a complete dentition. According to the method, the problem of data missing caused by enamel light reflection and adjacent tooth shielding is solved through a differential scanning strategy and regional data processing aiming at specific optical characteristics of teeth, and automatic construction of a high-quality dental three-dimensional model is realized.

The present disclosure relates to systems and methods for generating a digital representation of a three-dimensional (3D) object. In particular, the disclosure relates to a dental scanning system for acquiring images of the object and for generating the digital representation of the object. One embodiment relates to a dental scanning system for scanning a dental object, comprising an intraoral 3D scanning device comprising at least one projector unit configured to project a light pattern along a projector optical axis, the light pattern comprising a plurality of pattern features; one or more cameras having at least partly overlapping fields of view along different camera optical axes (and along the projector optical axis), each of the cameras comprising an image sensor, wherein the system further comprises one or more processors configured to generate a digital three-dimensional representation of the dental object based on triangulation.

The invention relates to the technical field of oral implantation guidance, and provides a digital false tooth mounting and positioning device based on three-dimensional scanning and a method thereof. The method comprises the following steps: scanning the oral cavity of a patient through an oral cavity scanner to generate a three-dimensional oral cavity digital model; generating a virtual implant of the patient and corresponding initial implantation parameters based on the three-dimensional oral cavity digital model through a SegFormer segmentation network; based on historical operation data, initial implantation parameters, bone density, patient attributes and occlusal force parameters, a long sequence prediction network is adopted to predict the position offset and bone resorption degree of the virtual implant after osseointegration through a segmented attention mechanism and a network memory cache mechanism, and optimal implantation parameters are obtained; and pushing a visual dynamic model containing the candidate positioning strategy to the user based on the optimal implantation parameter, driving an oral cavity model printer to obtain an implantation guide plate model and an oral cavity environment model, assisting the user in verifying the installation effect of the candidate positioning strategy, and improving the accuracy of false tooth installation and positioning.

The invention discloses an intelligent eye control bonding system and method for an orthodontic appliance, and relates to the technical field of intelligent oral medical equipment. Comprising a pupil eye-control image positioning module, a bracket initial coordinate is generated through doctor pupil trajectory tracking and doctor head dynamic compensation, a patient three-dimensional oral cavity model is combined for mapping, a three-dimensional visual interface is constructed by integrating oral scanning instrument and cone beam CT data, and the three-dimensional visual interface is projected to an entity tooth surface through a laser positioning projection device. And the dynamic tracking module corrects the posture of the bracket in real time through rigid compensation and elastic compensation based on inertial sensing data. The path planning and control module adopts an improved RRT *-Connect algorithm, and an elastic map and an impedance-admittance hybrid control strategy are fused to optimize a motion path. And the mechanical arm execution module adopts a modular six-axis framework, integrates a triple-combination driving system and a double-cavity end effector, and completes submillimeter-level bonding operation in an oral cavity limited space. The positioning precision and the bonding efficiency of the bracket are improved.

Adhesive compositions including a multivalent metal salt, an multidentate acidic organic compound, and an aqueous medium are disclosed. The multivalent metal salt and multidentate acidic organic compound can include, as a mixture, a carbonate salt and / or carbonic acid. The aqueous medium can include pH adjusting agent such as sodium hydroxide. The adhesive composition, upon curing, can have a porosity of 10-50%. The adhesive composition, upon curing, can include a plurality of pores. The adhesive composition can be porous, and upon curing can have a plurality of pores having a pore size of between 20 μm to 200 μm. Methods of producing the adhesive composition are disclosed. Methods of using the adhesive composition are further disclosed.

The invention relates to the technical field of three-dimensional point cloud data processing, in particular to a digital denture model design method based on a jaw position relation. Based on comparison of the initial three-dimensional point clouds under different opening amplitudes, a soft tissue interference area where soft tissue movement possibly exists and a hard tissue boundary false displacement area corresponding to point cloud overlapping caused by a scanning view angle are obtained; according to the method, the movement trend of each point in the false displacement area of the hard tissue boundary is corrected in combination with the movement trend of the adjacent area in the oral cavity, so that the corrected three-dimensional point cloud obtained after correction is more accurate, the accuracy of recording according to the corrected three-dimensional point cloud is higher, and the accuracy of the generated digital denture is improved.

The invention discloses a diagnostic wax pattern digital manufacturing method and system, a product and a medium, and relates to the field of image processing.The method comprises the steps that oral cavity data of a target patient are obtained according to a three-dimensional oral cavity scanner, facial feature data of the patient are synchronously collected through a facial scanner, and the oral cavity data are converted into a first digital model; converting the facial feature data into a second digital model, extracting key parameters of teeth of the target patient based on the first digital model, marking a to-be-modified area on the first digital model based on the personalized demand information, extracting a key control point in the to-be-modified area, extracting a repair parameter standard value from a clinical case database, and repairing the target patient according to the repair parameter standard value. Constructing an initial digital veneering model based on the parameter standard values; and converting the personalized demand information into a target adjustment amount of the key control point, and modifying the initial digital veneering model according to the target adjustment amount to obtain a digital diagnosis wax pattern. By implementing the method, the manufacturing accuracy of the oral cavity repairing and diagnosing wax pattern can be improved.

The invention discloses a method for preparing a light-transmitting gradient multicolor zirconium oxide material through photocuring, which comprises the following steps: preparing modified aluminum oxide which is formed by attaching a strontium element and a chromium element to the surface of aluminum oxide; preparing bottom-layer slurry, middle-layer slurry and upper-layer slurry from the zirconium-aluminum powder; the bottom layer slurry comprises zirconium aluminum powder and a coloring agent; the middle layer slurry comprises zirconium-aluminum powder, a light-transmitting auxiliary agent and a coloring agent; the upper-layer slurry comprises zirconium-aluminum powder, a light-transmitting auxiliary agent and a coloring agent; preparing a bottom layer green body by using the bottom layer slurry through 3D printing by using the photocuring slurry, preparing a middle layer green body on the surface of the bottom layer green body by using the middle layer slurry, and preparing an upper layer green body on the surface of the middle layer green body by using the upper layer slurry, so as to obtain a zirconium oxide material green body; the light-transmitting gradient multicolor zirconia material with gradient light transmission and gradient color is directly prepared through 3D printing, the color of the light-transmitting gradient multicolor zirconia material is closer to that of real teeth, and the strength and toughness are not reduced.

A three-dimensional optical scanning system for scanning a three-dimensional dental object, the system including a first scanning station configured to receive a first three-dimensional dental object, and further configured to rotate around a first axis during the scanning; and an imaging unit including at least one camera and configured to rotate around an imaging unit axis during the scanning, wherein the optical scanning system is configured such that the imaging unit acquires a plurality of two-dimensional images of the first three-dimensional dental object corresponding to a set of predefined static relative positions between the imaging unit and the first scanning station for generating a first three-dimensional digital representation of the first three-dimensional dental object.

The dental handpiece has a handle and a housing with a first light-emitting diode and a first optical sensor. The housing also has a second light-emitting diode, a second optical sensor, shielding windows for each optical and apertures for supplying compressed air to each shielding window. A diffuser is located in each aperture, the diffuser being adapted to generate an air jet forming an air curtain. The dental handpiece can provide a reliable protection of the optical sensors by the air curtain and a high-quality three-dimensional image of an oral cavity during manipulation.

An oral scanner system having an oral scanner, the oral scanner having a handle, a head, a camera, a spacer attachment being detachably attached to the head, and a processor being arranged to receive at least one signal from the camera to determine, based on an analysis of the at least one signal, an attachment state of the spacer attachment.

The present disclosure relates to systems and methods for generating a digital representation of a three-dimensional (3D) object. In particular, the disclosure relates to a dental scanning system for acquiring images of the object and for generating the digital representation of the object. One embodiment relates to a dental scanning system for scanning a dental object, comprising an intraoral 3D scanning device comprising at least one projector unit configured to project a light pattern along a projector optical axis, the light pattern comprising a plurality of pattern features; one or more cameras having at least partly overlapping fields of view along different camera optical axes (and along the projector optical axis), each of the cameras comprising an image sensor, wherein the system further comprises one or more processors configured to generate a digital three-dimensional representation of the dental object based on triangulation.

Devices, systems, and methods for predicting palatal geometry are provided. In some embodiments, a system for predicting an anatomy of a patient's palate includes one or more processors and a memory operably coupled to the one or more processors and storing instructions that, when executed by the one or more processors, cause the system to perform operations including accessing a first digital representation including an initial geometry of soft tissue corresponding to a patient's palate, determining an initial geometry of hard tissue of the patient's palate, predicting a change in the hard tissue during a treatment, using the predicted change in the hard tissue to predict a change in the soft tissue during the treatment, and outputting a second digital representation including a predicted geometry of the patient's palate at a future treatment stage of a treatment plan, based on the predicted change in the soft tissue.

The invention provides a granulation raw material, a pre-sintered body, a zirconia porcelain block, a fast firing production method and application. The fast firing production method comprises the following steps: S1, providing a first zirconium oxide material and a second zirconium oxide material; s2, compounding the first zirconium oxide material and the second zirconium oxide material, and granulating together with an auxiliary material to obtain a granulation raw material; s3, obtaining a green body based on the granulation raw materials; s4, carrying out pre-sintering treatment on the green body to obtain a pre-sintered body; and S5, machining the pre-sintered body, and then carrying out fast firing treatment to obtain the zirconium oxide porcelain block. On the basis of compounding of granulation raw materials, the overall performance of the zirconia ceramic block can be improved while a pre-sintered body can be rapidly sintered.

The invention discloses a double-component reinforced 5Y-PSZ dental ceramic material and a preparation method thereof, and relates to the technical field of ceramic material preparation. The method comprises the following steps: mixing ZrCl4 and deionized water, and dropwise adding an ammonia water solution to prepare m-ZrO2 nano ceramic powder; zrOCl2. 8H2O, Y (NO3) 3.6 H2O and deionized water are mixed, the m-ZrO2 nano ceramic powder and polyethylene glycol 2000 are added, and the material is prepared through calcination, spray granulation, hot-pressing presintering and high-temperature sintering. According to the 5Y-PSZ dental ceramic material disclosed by the invention, the nano-scale m-phase ZrO2 is adopted as a reinforcing material and is dispersed and distributed inside the 5Y-PSZ, and through volume expansion generated by t-m phase change of the m-phase ZrO2, the anti-aging performance is guaranteed, and meanwhile, the reinforcement of the 5Y-PSZ dental ceramic material is realized. The invention solves the problem of insufficient strength of the 5Y-PSZ dental ceramic material in the prior art.

The invention relates to the technical field of three-dimensional analysis, in particular to an oral cavity three-dimensional motion analysis system based on dynamic occlusion scanning. The system comprises an oral cavity occlusion feature extraction module, a dynamic occlusion reconstruction module, an occlusion track smoothing module and an oral cavity motion abnormity identification module, and a multi-view structured light scanner can be used for carrying out image scanning on the oral cavity in the dynamic occlusion process so as to obtain a multi-frame original occlusion image sequence; occlusal feature extraction and three-dimensional occlusal reconstruction are carried out on the multiple frames of original occlusal image sequences to construct corresponding three-dimensional occlusal model sequences; a dynamic occlusion trajectory prediction model is constructed based on the three-dimensional occlusion model sequence, oral cavity three-dimensional motion analysis and occlusion trajectory smoothing filtering processing are carried out, and a smooth three-dimensional occlusion motion trajectory is generated; and performing oral cavity motion abnormity identification according to the smooth three-dimensional occlusion motion track so as to generate an oral cavity occlusion three-dimensional motion abnormity identification result. According to the invention, accurate capture and analysis of three-dimensional motion of the oral cavity can be realized.

An intraoral scanner includes a probe housing disposed at a distal end of an elongate wand. The probe housing forms an interior volume. The intraoral scanner further includes a lightguide projector that includes a light source configured to generate light. The light source is disposed in the interior volume. The lightguide structure is configured to receive the light from the light source. The light is to propagate through the lightguide structure via internal reflections. The lightguide projector is configured to cause the light to exit the lightguide structure to illuminate a mouth of a patient.

Some embodiments of the present disclosure include, for example, a method for automatically entering content into a periodontal chart. Such methods include, for example, providing an Intra Oral Scanner (IOS) with an elongate probe extending therefrom, contacting a first point inside an oral cavity with the probe while scanning the cavity with the IOS, determining a position of the first point based on the scanning to determine a position in space of the elongate probe, calculating content to be entered into a periodontal chart, and entering the content into the periodontal chart. Related apparatus and methods are also described.

The disclosure relates to a method for improving digital dentistry including: providing a 3D digital impression of a craniofacial anatomy; the digital impression described in terms a plurality of cells, providing a database of a plurality of dental procedures and their corresponding criteria for allowing applicability; analyzing the cells with respect to the criteria; determining, in response to the analysis, which of the dental procedures the digital impression is usable for and which of the dental procedures the digital impression is not usable for.

A bite registration device and method for creating a dental prosthesis, the bite registration device comprising a fixed housing having a bottom surface and a top surface that defines a cavity that houses a yoke assembly and a rotational control assembly. A base plate connected to the bottom surface of the fixed housing, and a lower impression tray to hold a first amount of removable impression putty, attached to the bottom surface of the fixed housing, wherein the rotational control assembly controls the movement of the lower impression tray. An upper impression tray to hold a second amount of removable impression putty, attached to the top surface of the fixed housing, wherein the yoke assembly controls the movement of the lower impression tray. A bite registration device controller for regulating alignment of the upper impression tray and the lower impression tray.

The embodiment of the invention is suitable for the technical field of dentistry and 3D printing, and provides a method for generating a tooth model and a tooth model printing method and device.The method for generating the tooth model comprises the steps that an oral cavity scanning model is obtained, and the oral cavity scanning model comprises a scanning rod model; determining a joint device model matched with the scanning rod model; the scan rod model is removed from the oral scan model and the engagement device model is added based on a location match to the scan rod model to generate a tooth model. By applying the method, the oral cavity data of the patient can be obtained in a digital mode, then the tooth model is generated according to the matched joint device model, and accurate model taking is achieved. On the basis, the 3D printing technology can be adopted for printing to obtain the corresponding entity tooth, errors caused by manual assembly are reduced, and the precision of the entity tooth obtained through printing is guaranteed.

A method, for forming an intraoral monitor includes forming a first portion of a retainer corresponding in shape to teeth. The method includes forming a second portion of a retainer corresponding in shape to the teeth and including a pocket for insertion of a sensor. The method includes coupling the first and second portions of the retainer to envelop the sensor in the pocket, the retainer having an opening such that the sensor is exposed to the buccal side of the mouth of a user when the retainer is mounted on the teeth.

The invention discloses a digital stable jaw pad designing and manufacturing method, and relates to the technical field of oral rehabilitation and digital medical technology.The digital stable jaw pad manufacturing method comprises the following steps that a, three-dimensional point cloud data of oral dentition and mucosa of a patient is obtained through a three-dimensional scanner; b) determining a stable jaw position coordinate model by using an optical motion capture system; c) designing a jaw pad three-dimensional entity model with an anterior tooth area, a posterior tooth area and an edge structure based on the three-dimensional point cloud data and the stable jaw coordinate model; and d) manufacturing the jaw pad through 3D printing equipment, wherein the 3D printing equipment is formed by adopting a polyether-ether-ketone material. By integrating digital acquisition, design and manufacturing technologies, the pain point of a traditional method is solved, and personalized, high-precision and rapid manufacturing of the stable jaw pad is realized.

Disclosed herein is a dental method that comprises receiving a selection of a replacement tooth for a subject. The method further comprises receiving one or more three-dimensional digital tooth models descriptive of one or more teeth of the subject. The method further comprises receiving a generated three-dimensional digital model of the replacement tooth in response to inputting the one or more three-dimensional digital tooth models descriptive of one or more teeth of the subject into a tooth model generating neural network. The tooth model generating neural network comprises an encoder portion and a decoder portion. The encoder portion is configured for outputting a collective feature vector descriptive of the one or more digital tooth models. The tooth model generating neural network further comprises at least one fully connected layer configured to output a latent space vector into the decoder portion in response to receiving the collective feature vector.

A method of multimodal scanning may include generating surface scan data of an intraoral structured using structured light. The method may include generating volumetric scan data of an internal structure of the intraoral structure with OCT scanning. The OCT scan data may be aligned with the surface scan data. A three-dimensional volumetric model of the patient's dentition may be generated based on the aligned OCT scan data and the surface scan data.

Disclosed is a method for monitoring changes in jaw motion over time. A primary relative jaw motion data set and a secondary relative jaw motion data set are obtained using an intraoral scanner. The method further comprises a computer implemented method, where the computer implemented method comprises the steps of, receiving the primary relative jaw motion data set and the secondary relative jaw motion data set; obtaining a model class representing desired and / or regularising properties of articulation; obtaining a primary model parameters by fitting the primary relative jaw motion data set to the model class; obtaining a secondary model parameters by fitting the secondary relative jaw motion data set to the model class; determining monitoring information based on comparing the primary model parameters with the secondary model parameters, and displaying the monitoring information.

An improved dental impression tray system provides a way to accommodate multiple arch sizes. The tray is adjustable and has an anterior section with two distal ends and a posterior section with two distal ends. The two sections are connected together at their distal ends. A mesh membrane extends between the sections to maintain the impression material. The ends of the posterior section include a plurality of vertical pins and a vertical opening is located adjacent each distal end of said anterior section. To adjust the size of the tray, the distal ends of the anterior section can be disconnected from said distal ends of the posterior section and then reconnected by inserting the pins into the opening. Further size adjustments can be made by removing additional pins and inserting the next remaining pins into the openings.

The invention provides a multi-source data fitting method and system for oral edentulous jaw implantation, and the method comprises the steps: S1, assembling a scanning rod on an implant of the oral cavity of a patient, carrying out the intraoral three-dimensional scanning of the scanning rod, and obtaining the intraoral scanning data of the three-dimensional positions of all implants; s2, assembling an implant surface scanning positioner on the first implant, performing extraoral three-dimensional photography on the facial information of the patient and the visual target, and obtaining the facial information of the patient and three-dimensional position facial scanning data of the first implant corresponding to the facial information of the patient; and S3, performing three-dimensional coordinate system alignment processing on the three-dimensional position intraoral scanning data of all the implants and the three-dimensional position facial scanning data of the first implant, so that the three-dimensional position intraoral scanning data of all the implants are registered with the facial information of the patient, and generating a temporary restoration model. According to the invention, the precise relation between all the implants in the oral cavity and the facial information of the patient can be established, so that the restoration adaptive to the personalized features of the facial of the patient is generated.