4947results 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 of the invention comprises obtaining training dental CT scans, identifying individual teeth and jaw bone in each of these CT scans, and training a deep neural network with training input data obtained from these CT scans and training target data. A further method of the invention comprises obtaining a patient dental CT scan, identifying individual teeth and jaw bone in this CT scan and using the trained deep learning network to determine a desired final position from input data obtained from this CT scan. The (training) input data represents all teeth and the entire alveolar process and identifies the individual teeth and the jaw bone. The determined desired final positions are used to determine a sequence of desired intermediate positions per tooth and the intermediate and final positions and attachment types are used to create three-dimensional representations of teeth and / or aligners.

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.

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.

Embodiments of the present disclosure relate to a method and apparatus for processing scanning data, a device, and a medium. The method includes: obtaining a plurality of frames of images to be processed including auxiliary feature points, where the auxiliary feature points have corresponding distribution true values; performing processing based on the plurality of frames of images to be processed to obtain all three-dimensional coordinate points in a same coordinate system in conjunction with a current camera pose; performing measurement processing on all the three-dimensional coordinate points to obtain target three-dimensional coordinate points; and determining a target position transformation relationship based on the target three-dimensional coordinate points and the distribution true values.

Some embodiments of the present invention provide systems, methods, and devices for intraoral scanning. A computing device coupled with the intraoral scanner acquires a point cloud representing a three-dimensional geometric surface of the oral cavity where the implant has been implanted. The computing device then identifies a reliable data region and an unreliable data region of the geometric surface based on the acquired point cloud, where the reliable data region is associated with a region where a deformation amount occurring when applied is less than a deformation threshold, and where the unreliable data region is associated with a region where the deformation amount is less than the deformation threshold. And the unreliable data region is associated with a region in which the deformation quantity generated when the pressure is applied is greater than or equal to a deformation threshold value. Besides, the point cloud of the reliable data area is selected and stored to form first scanning data, second scanning data of the oral cavity three-dimensional geometric surface where the implant and the scanning rod are implanted are obtained, and registration is conducted on the first scanning data and the second scanning data; and determining position information of the scanning rod based on the registration result.

The invention relates to the technical field of medical equipment, in particular to a preset tooth cutting method and system based on image data, and the method comprises the following steps: S1, obtaining multi-modal image data by using CT (Computed Tomography), MRI (Magnetic Resonance Imaging) and optical scanning technologies, and carrying out consistent analysis after preprocessing; and S2, performing automatic image segmentation by using a deep convolutional neural network (CNN). S3, optimizing the implant design through a generative adversarial network (GANs); s4, simulating and optimizing a cutting path through an augmented reality (AR) environment; and S5, laser micromachining is used for surface treatment of the implant. According to the method, the dentin cutting scheme matched with the specific shape and size of the bone defect area is designed through the data generated by scanning the three-dimensional shape of the complete tooth in advance, so that the image definition and the diagnosis accuracy are improved, the preoperative analysis is more accurate, and the subsequent personalized treatment design is effectively supported.

An AI image diagnosis apparatus into which three-dimensional tooth image data captured by a dental OCT device is inputted and which analyzes the inputted three-dimensional tooth image data, comprising: a model executor that sequentially inputs two-dimensional tomographic image data constituting the diagnostic target three-dimensional tooth image data into a trained model, to thereby obtain, as an execution processing result of the trained model, lesion information data, which is data related to a part identified as a characteristic part such as a lesion in the inputted tomographic image data, for each piece of tomographic image data in the three-dimensional tooth image data, and detect lesions from the inputted three-dimensional tooth image data using the obtained lesion information data, wherein the trained model is constructed by training of three-dimensional tooth image data of multiple examinees captured by a dental OCT device in the past.

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.

An intraoral scanning system comprises an elongate handheld wand with a probe at a distal end, a structured light projector configured to project a uniform structured light pattern onto an object, a plurality of cameras configured to capture points of the uniform structured light pattern projected onto the object by the structured light projector, and one or more processors. The one or more processors are configured to determine a correspondence between projected points in the uniform structured light pattern generated by the structured light projector and captured points of the uniform structured light pattern captured by the plurality of cameras viewing the uniform structured light pattern projected onto the object, and to use triangulation and the determined correspondence to determine three-dimensional points in space associated with the captured points of the uniform structured light pattern captured by the plurality of cameras.

The invention provides a real-time monitoring and analyzing system for tooth orthodontic correction, and relates to the technical field of oral treatment, the real-time monitoring and analyzing system comprises an information capturing system, an intelligent operation system and an appliance dynamic regulation and control system, the information capturing system comprises a three-dimensional oral cavity imager, a health condition evaluator, a multifunctional induction network and a portable monitoring device, the three-dimensional oral cavity imager generates a three-dimensional oral cavity image through triangulation positioning, extracts oral cavity mucous membrane features by combining an improved local binary pattern algorithm and adding an edge enhancement filter, and confirms the identity when the Euclidean distance is calculated to be smaller than a preset threshold value. According to the system, mucous membrane texture features are extracted through combination of the three-dimensional oral cavity imager and the improved LBP algorithm for identity verification, the health condition assessment instrument collects temperature, humidity and pH value every 6 minutes, the portable monitoring device collects pressure and biological signal data, and comprehensive collection of multi-dimensional data is achieved.

The invention belongs to the technical field of application of an artificial intelligence technology to medical rehabilitation instruments, and relates to a method for designing an orthosis based on an AI artificial intelligence technology, and the method comprises the steps: S1, data collection and preprocessing: converting patient data into structured data; s2, feature extraction: extracting geometric and biomechanical features related to orthosis design, and constructing a feature set; s3, processing the features by using a deep learning model, and predicting personalized parameters; s4, designing and optimizing an orthopedic module, and optimizing pressure distribution; s5, a three-dimensional orthopedic CAD system is developed and deployed, and patient information and orthopedic device design are managed; and S6, evaluation and optimization: fusing clinical data, and optimizing the system according to an evaluation result. According to the method, the AI technology is utilized to improve the design efficiency and the adaptation accuracy, the personalized requirements are met, the rehabilitation effect is optimized, digital management of data and iteration of an AI model are achieved, a treatment basis is provided for rehabilitation medical employees such as a brace teacher and a rehabilitation therapist, and the clinical effectiveness of a rehabilitation treatment scheme is improved.

A dental scanning system may include an intraoral scanner and an extraoral imaging device including a color imaging camera couplable in electronic communication with the intraoral scanner. The system may include non-transitory computer readable medium with instructions that, when executed by a processor, cause the system to carry out a method. The method may include capturing 2D image data of a patient's face and teeth with the extraoral imaging device, capturing intraoral 3D image data of a dentition of the patient with the intraoral scanner, generating a 3D model of the patient's teeth based on the intraoral 3D image data, and associating the 2D image data of the patient's face with the 3D model.

An intraoral scanner comprises one or more reconfigurable buttons, a display configured to display at least one of one or more icons or one or more texts associated with the one or more reconfigurable buttons, one or more cameras configured to capture intraoral scan data of at least a part of a dental arch, and a communication module configured to transmit the intraoral scan data to a first computing device.

A method includes receiving intraoral scan data of an intraoral cavity of a patient; processing the intraoral scan data to determine, for each dental condition of a plurality of dental conditions, whether the dental condition is detected for the patient and a severity of the dental condition; and presenting indications of the plurality of dental conditions together in a graphical user interface (GUI), wherein the indications show, for each dental condition of the plurality of dental conditions, whether the dental condition was detected for the patient and the severity of the dental condition.

An intraoral scanner includes a case having an opening part at one end thereof, a light source part at the other end of the case and configured to emit light, a first optical system including a first reflector to reflect the light emitted from the light source part and a second reflector disposed apart from the first reflector to reflect the light reflected by the first reflector toward the opening part, a second optical system in the opening part to reflect the light reflected from the first optical system toward a subject and reflect light reflected from the subject toward the second reflector, a third optical system adjacent to a back surface in the opposite direction of a reflective surface of the second reflector to reflect the light reflected from the second optical system, and an image sensor part to detect the light reflected from the third optical system.

The invention relates to an optical system which comprises a light path transmitting subsystem, a scanning reflector (6) and an image receiving and processing subsystem. The light path emission subsystem comprises an illumination module (1), a light modulation module (4) and a curved prism (21). The curved surface prism comprises a light incident surface (21A), a reflection-transmission composite interface (21B) and a curved surface (21C) plated with a reflecting film, and is used for changing the direction of a light path and focusing the light path, so that the light path enters from the light incident surface, is reflected by the reflection-transmission composite interface, is reflected by the curved surface and is focused; and then the light is emitted from the reflection-transmission composite interface and enters the light modulation module at a specific angle. The invention also relates to an oral digital impression instrument equipped with the optical system. According to the optical system, the curved prism is used for replacing a traditional lens and reflector combination, the space size of the oral cavity digital impression instrument is remarkably reduced, and the requirements for miniaturization and portability are met.

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.

Herein disclosed are robotic dentistry methods comprising tooth extraction and crown preparation. Robotic tooth extraction may comprise determining if the correct tooth is targeted, based on a scanned image; determining a decay state of the tooth based on the scanned image; selecting an extraction technique determined as a function of the decay state; and extracting the tooth using the selected extraction technique. Robotic crown preparation may comprise receiving an initial reduction plan to reduce a tooth; presenting, to a dentist for approval, the initial reduction plan for approval; upon approval, reducing the tooth according to the approved initial reduction plan; upon rejection, modifying the initial reduction plan based on dentist input; receiving the modified reduction plan to reduce the tooth; presenting, to a dentist for approval, the modified reduction plan for approval; and upon approval of the modified reduction plan, reducing the tooth according to the approved modified reduction plan.

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 invention relates to a tooth scanning method and device, equipment and a medium, and the method comprises the steps: obtaining a target image comprising the three-dimensional shape and texture information of a tooth gingival lower edge line in response to the operation of carrying out three-dimensional scanning on the gingival lower edge line; performing feature extraction on the target image to obtain edge line distribution three-dimensional points; connecting the edge line distribution three-dimensional points into an edge line; and generating and displaying prompt information matched with the shape of the edge line, wherein the prompt information is used for prompting to continue or stop executing the three-dimensional scanning operation for the subgingival edge line. The accuracy of subgingival edge line extraction can be improved.

A dental polishing paste and a method of surface finishing a dental ceramic with the dental polishing paste is described. The dental polishing paste includes 60 to 90 weight percentage (wt. %) glycerin; 7.5 to 17.5 wt. % inorganic nanoparticles such as, diamond or zirconia, having a mean particle size of 5 to 25 nanometer (nm); and 2.5 to 32.5 wt. % additive, each based on a total weight of dental polishing paste.