332 results about "Dental Models" patented technology

The invention provides an oral surgery positioning and navigation method and system and a storage medium, and the method comprises the steps: calibrating an implanted mobile phone to obtain a unit vector of a rotating shaft of a drill bit and a three-dimensional coordinate value of the tip of the drill bit under an optical three-dimensional coordinate system, scanning to obtain a CT three-dimensional model of a patient, and segmenting to obtain a tooth CT model and an alveolar bone CT model; generating a tooth three-dimensional point cloud according to the real-time pattern of the speckle structured light on the teeth of the patient, acquiring a matrix transformation relation between a CT three-dimensional coordinate system and an optical three-dimensional coordinate system, and performing real-time navigation on the implanted mobile phone according to the real-time point position deviation and the real-time angle deviation of the drill bit. According to the technical scheme, the matrix transformation relation between the CT three-dimensional coordinate system and the optical three-dimensional coordinate system is calculated through the tooth CT feature points and the tooth point cloud feature points, and auxiliary navigation is carried out by comparing the target position of the implant with the real-time pose of the tip of the drill bit, the direction vector of the planting path and the unit vector of the rotating shaft of the drill bit. Operation is convenient and positioning precision is high.

A method of treating a patient's dentition may include generating, from a first 3D model of a first physical impression of a first arch of a patient and a second 3D model of a second physical impression of a first arch of the patient, a reconstructed 3D model of the first arch of the patient by incorporating one or more portions of the first 3D model with one or more portions of the second 3D model and creating a treatment plan for the patient's dentition using the first 3D model. The method may also include fabricating a set of dental alignment devices configured to implement the treatment plan when the dental alignment devices in the set of dental alignment devices are sequentially worn on the patient's dentition.

The invention relates to a dynamic simulation method and system for a tooth movement process based on a Type model, and the method comprises the steps: carrying out the data collection of an artificial tooth and a fixed appliance through three-dimensional scanning, and obtaining the three-dimensional data of a tooth jaw structure; performing overlap analysis on the crown root model according to the three-dimensional data to obtain a digital dental model containing periodontal tissues; performing material attribute assignment on an anatomical structure in the digital tooth jaw model according to preset material parameters to obtain a biomechanical tooth jaw model; and performing time recursion iteration on the biomechanical tooth jaw model through finite element analysis to obtain four-dimensional dynamic simulation data for simulating a tooth movement process, so as to provide visual orthodontic process teaching demonstration based on the four-dimensional dynamic simulation data. According to the invention, the dynamic visual simulation of the tooth movement process is realized, the feedback of the Type Dont system can be quantified, and the teaching interactivity is improved.

The embodiment of the invention is suitable for the technical field of dentistry and 3D printing, and provides a method and system for manufacturing a dental object, the method comprises the following steps: obtaining a dental model, the dental model comprising at least one abutment and a repair part associated with a dental prosthesis model; establishing a stent model, wherein the stent model is configured to be mounted on an abutment tooth; a base model is established, the base model comprises a first part and a second part, the support model is clamped between the first part and the second part, and the first part of the base model is aligned with the repair part of the dental model; establishing a tooth prosthesis model, wherein the tooth prosthesis model is aligned with the second part of the denture model; manufacturing a base plate based on the first part and the second part of the base plate model, and manufacturing a stent based on the stent model; the base and the stent are connected to obtain a dental object. By adopting the method, the dental object can be manufactured in a digital mode, and the manufacturing efficiency and accuracy of the dental object are improved.

A three-dimensional tooth model segmentation method of a double-branch geometric attention network based on centroid guidance is oriented to oral cavity three-dimensional scanning point cloud data and comprises the steps that firstly, normalization and normal vector estimation are conducted on the oral cavity three-dimensional point cloud data, a double-branch encoder for coordinate and normal decoupling is constructed, and a global topological structure and local geometric features are extracted respectively; secondly, a separable attention mechanism guided by the mass center is introduced into a coordinate branch so as to improve the distinguishing ability of adjacent teeth, and a graph convolution attention mechanism is introduced into a normal branch so as to strengthen the boundary expression of the teeth and gingiva; further, in the fusion stage, a mass center thermodynamic diagram and multi-scale feature aggregation are combined, and joint modeling of global and local structures is achieved; and finally, collaborative optimization of instance segmentation and centroid localization tasks is carried out through a dynamically weighted joint loss function. According to the method, the segmentation precision and robustness under complex cases are remarkably improved while the light weight is kept, and the automation and clinical practicability of oral diagnosis and treatment are enhanced.

Disclosed is a computer-implemented method for adjusting an arrangement of a plurality of three-dimensional digital tooth models for a dental restoration. The method comprises selecting at least one of the three-dimensional digital tooth models, which is paired with a corresponding three-dimensional digital tooth model. A first calculation of a first adjustment of a geometric form of the selected tooth model is performed based on the second input defining a modification. The first adjustment is applied to the selected tooth model. A second calculation of a mapped adjustment of the geometric form of the paired corresponding tooth model is performed based on the second input or the first calculation. The mapped adjustment is based on a replica of the first adjustment adjusted relative to a local coordinate system of the paired corresponding tooth model and applied to the paired corresponding tooth model. The resulting adjusted three-dimensional digital denture model is provided for manufacturing.

The invention relates to the technical field of dental digitization, and discloses a three-dimensional tooth model construction method, device, equipment and medium, and the method comprises the steps: obtaining a multi-frame oral cavity fringe pattern and an oral cavity color image, and carrying out fringe enhancement processing on the multi-frame oral cavity fringe pattern to obtain a multi-frame fringe enhancement pattern; extracting a stripe center point coordinate, and obtaining a code value of the stripe enhancement graph; performing mask area analysis on the oral cavity color image and the code value by using the segmentation model to obtain a tooth area mask; obtaining a target stripe center point coordinate and a target code value through data screening; performing data encapsulation on the target stripe center point coordinate, the target code value and the oral cavity scene color image, and sending oral cavity encapsulation data to a cloud node; performing real-time point cloud reconstruction based on the oral cavity encapsulation data to obtain three-dimensional point cloud data corresponding to the teeth of the target user; and performing point cloud optimization on the three-dimensional point cloud data to obtain a three-dimensional tooth model of the target user. According to the invention, the efficiency of constructing the three-dimensional tooth model can be improved.

The invention discloses a design and preparation method of a personalized gradient thickness invisible orthodontic appliance model, relates to the technical field of tooth orthodontics, and aims to overcome the defects that the thickness is uncontrollable and preset mechanical properties cannot be accurately realized when an invisible orthodontic appliance is manufactured by a traditional hot press molding process. The method comprises the following steps: firstly, reconstructing a personalized dental model containing tooth roots and bone tissues based on CBCT data of a patient; designing a plurality of gradient thickness appliance schemes; through finite element analysis and simulation, selecting an optimal scheme which is most favorable for realizing correction effects such as overall movement of teeth; and finally, integrally forming and manufacturing the selected appliance by adopting a direct 3D printing technology. The direct 3D printing ensures that the appliance can be manufactured in a high-precision and high-fidelity manner from a complex gradient thickness structure with thick gingiva and thin occlusal surface, so that the optimized mechanical property verified by simulation can accurately reproduce in a real object, the inherent defects of a hot-pressing film process are thoroughly overcome, and the accuracy and predictability of correction are remarkably improved.

The invention discloses five-axis laser cutting equipment for dental cast manufacturing, and relates to the field of laser cutting equipment.The five-axis laser cutting equipment comprises an equipment stand, a sliding stand assembled above the equipment stand, transportation equipment and a feeding and discharging manipulator, the positions of the equipment stand, the transportation equipment and the feeding and discharging manipulator are relatively fixed, and a five-axis machine table is erected on the upper end face of the sliding stand in a sliding mode; the sliding stand is used for adjusting the longitudinal position of the five-axis machine table, a portal frame is fixedly arranged on the upper end face of the sliding stand, a fixing frame is slidably assembled on the portal frame, the portal frame is used for adjusting the transverse position and the axial position of the fixing frame, and a laser lens is fixedly erected on the upper end face of the fixing frame. According to the device, smoke generated at the laser cutting position of the dental cast can be effectively sucked and purified through the cooperative effect of the circulating suction unit and the peculiar smell adsorption unit, solid impurities in the smoke can be effectively filtered out through a circulating suction purification mode, peculiar smell of gas in the smoke can be eliminated, and the practicability of the device is improved. Therefore, the air quality in a factory is guaranteed.

The invention relates to the field of orthodontics, in particular to a tooth orthodontics intermediate motion prediction method based on a conditional diffusion model. The invention aims to solve the problem that in the existing digital orthodontic technology, the motion trail generation in the correction intermediate process depends on manual design, and the efficiency is low. According to the method, a conditional diffusion model is constructed, and supervised training is carried out by using data sets of tooth movement tracks before, after and during tooth treatment. In the reasoning stage, the model only needs to input tooth model data before and after treatment, and a complete intermediate movement track meeting biomechanical constraints and clinical requirements can be automatically and accurately generated. Through a data driving mode, expert experience is learned and reproduced, tooth collision can be effectively avoided, the occlusion relation is ensured, and the automation level and prediction precision of orthodontic scheme design are remarkably improved.

The invention discloses a standardized three-dimensional periodontal attachment quantification system and method, and relates to the technical field of digital oral medicine, and the method comprises the following steps: calibrating a cementum-enamel boundary, dividing a tooth model into a dental crown and a tooth root, and determining the total surface area of the tooth root; performing sensitivity analysis by using the candidate threshold sequence, and determining an optimal diagnosis threshold in combination with a surface integrity criterion; based on the optimal diagnostic threshold, an absolute adhesion area and a relative adhesion area ratio are calculated and output. The invention provides a quantitative method capable of truly, comprehensively and accurately reflecting the three-dimensional pathological change of the periodontal tissue, and the accuracy of a measurement result is ensured through standardized crown root segmentation and accurate geometric judgment; through data-driven parameter optimization, uncertainty caused by manual intervention is eradicated, and objectivity and repeatability of a measurement result are ensured.

Methods of manufacturing dental etching templates. A virtual shell having one or more cavities shaped to receive one or more teeth of a virtual dental model of a patient's dentition may be formed. A virtual well may be formed at a position of the virtual shell based on an area on a tooth of the patient's dentition to be etched. Walls that define the virtual well may be shaped to accommodate a volume of a wafer that absorbs a liquid etching material and to accommodate a reservoir that extends beyond the volume of the wafer. The reservoir may be shaped to contain excess liquid etching material from the wafer. A physical etching template may be formed based on the virtual etching template.

Provided herein are systems and methods for optimizing a 3D model of an individual's teeth. A 3D dental model may be reconstructed from 3D parameters. A differentiable renderer may be used to derive a 2D rendering of the individual's dentition. 2D image(s) of an individual's dentition may be obtained, and features may be extracted from the 2D image(s). Image loss between the 2D rendering and the 2D image(s) can be derived, and back-propagation from the image loss can be used to calculate gradients of the loss to optimize the 3D parameters. A machine learning model can also be trained to predict a 3D dental model from 2D images of an individual's dentition.

Systems and methods for identifying teeth in a patient image are provided. For example, a computer-implemented method can include, by one or more processors, accessing a 2D image including a depiction of a patient's teeth, where a plurality of the depicted patient's teeth are annotated with tooth identifiers according to a first tooth identification scheme. The computer-implemented method can further include transmitting, to a server computing device, the 2D image, and receiving from the server computing device, a second tooth identification scheme for the patient's teeth in the 2D image. The second tooth identification scheme can be generated by accessing a 3D model of the patient's teeth, projecting the 3D model onto the 2D image, comparing the projection to the 2D image to determine a probability parameter for each of one or more teeth in the 2D image, and determining, based on the probability parameters, the second tooth identification scheme.

The specification provides a method and device for generating a three-dimensional dental model. The method comprises: preprocessing point cloud data of a three-dimensional dental model after orthodontic treatment in an existing data set, and extracting geometric features from the preprocessed point cloud data; obtaining a vector quantization variational autoencoder model to be trained, and training the model by: encoding the extracted geometric features into a hidden space based on the encoder of the vector quantization variational autoencoder model, and further reconstructing the encoded information in the hidden space into the point cloud data of the three-dimensional dental model after orthodontic treatment through the decoder; and training a diffusion model in the hidden space of the vector quantization variational autoencoder model, wherein the diffusion model is used for diffusion processing of the encoded information input into the hidden space to generate new encoded information, so that the decoder generates new point cloud data of the three-dimensional dental model after orthodontic treatment according to the new encoded information.

The invention relates to the technical field of oral clinical medicine, and discloses a digital tooth bridge generation method which comprises the following steps: inputting a tooth three-dimensional mesh model and an occlusion direction; establishing a tooth local coordinate system based on the occlusion direction; on the basis of the tooth local coordinate system and the tooth restoration type, calculating a connector placement area between adjacent tooth models; generating a connector control line based on the connector placement area; constructing a connector grid according to the connector control lines; and fusing the connector grid and the tooth three-dimensional grid model to generate a tooth bridge model. Through a small amount of necessary input of the model and the direction, full-chain self-adaptive processing is driven, dependence on a preset template and manual intervention of a user is reduced, and therefore the tooth bridge model meeting the clinical function and attractiveness requirements is generated, the situations that the shape is abrupt and transition is unnatural after fusion are reduced, and the repairing effect is improved. The invention further discloses a digital tooth bridge generation device, a digital tooth bridge generation system and a computer readable storage medium.

Device for the digitization and manufacturing of dental models, for replicating the cavity and position of the implant connection in plaster and digital 3D models, having an analog, a fixing element and a multipurpose accessory, as a reference when digitizing and as an aid when inserting the analog in and removing it from the model. The analog, the fixing element and the accessory are adapted for fixing the analog on the 3D printing model and / or connecting the analog to the accessory. The external surface of the analog combines cylindrical portions and flat vertical and horizontal faces, which define positioning surfaces, for use as a scan analog. And, for plaster models, the device includes a protective cover for the analog.

According to an embodiment, a method for generating a digital three-dimensional model representing development in dental condition for a tooth is disclosed. The method includes obtaining, at different timepoints, a first digital 3D model of a patient's set of teeth including first texture data and a second digital 3D model of the patient's set of teeth including second texture data. The first digital 3D model including the first texture data and second digital 3D model including the second texture data are placed in a common texture space by uniformizing texture. Lastly, the digital three-dimensional model representing development in dental condition is generated based on a comparison of the first texture data and the second texture data of corresponding regions in the first digital 3D model and the second digital 3D model placed in the common texture space.

The invention provides a three-dimensional tooth model display method and device, an oral cavity scanner and a storage medium, and relates to the technical field of oral cavity scanning. The method comprises the following steps: acquiring a first point cloud of a standard dental cast and a second point cloud of a to-be-corrected display dental cast, and establishing a global coordinate system of the first point cloud and a global coordinate system of the second point cloud; using the first point cloud, the second point cloud, the global coordinate system of the first point cloud and the global coordinate system of the second point cloud to establish a shape curve of the to-be-corrected display dental cast; based on the shape curve of the to-be-straightened display dental cast, determining a focus, a viewpoint and an upward direction when the to-be-straightened display dental cast is straightened under a display visual angle set by a user; according to the method, the to-be-adjusted display dental cast is displayed according to the focus, the viewpoint and the upper direction of the to-be-adjusted display dental cast during adjustment, so that the dental cast is displayed quickly and objectively, and a user can master details of teeth more accurately.

Embodiments of the disclosure relate to an intraoral image processing method and an intraoral image processing apparatus, and the intraoral image processing method according to an embodiment may include obtaining an intraoral image by scanning an object including one or more teeth, generating a first tooth image from the intraoral image, generating, based on the first tooth image and tooth model data, a second tooth image including roots of the teeth, and displaying the second tooth image.

A method is provided for generating and / or displaying a dynamic tooth chart In some cases, the method can include receiving dataset(s) associated with a patient. Each dataset comprises data corresponding to an imaging modality of a plurality of imaging modalities and provides information on a dentition of the patient. The datasets are processed to generate, for each dataset, one or more tooth portions. Each tooth portion comprises an image of one or more teeth of the patient. The one or more tooth portions are arranged into a dental chart. A visualization of the dental chart of the patient is generated and provided to a user device for presentation in a user interface. In some cases, a method can include determining one or more chart annotations can by performing a shape analysis, a teeth arrangement analysis, and / or a material analysis on 3D dental model(s) and / or 2D images of the patient's jaw.

The invention provides a jaw pad model determination method and device, computing equipment and a storage medium. The jaw pad model determination method comprises the steps that first tooth model data and first jaw pad model data are acquired; according to the first tooth model data, determining a first position of a key point of a target tooth to be added with a jaw pad in the first correction step; the key point is used for indicating the position of the jaw pad to be added on the occlusal surface of the target tooth; according to the second tooth model data, determining a second position of the key point of the target tooth to be added with the jaw pad in the second correction step; determining movement information of each key point according to the first position of each key point and the second position of each key point; and determining a second jaw pad model corresponding to the target tooth in the second correction step according to at least one of the movement information of each key point, the first jaw pad model data and the corresponding occlusion relationship of the target tooth in the second correction step. According to the scheme, the corresponding jaw pad model can be adaptively generated for each patient.

A computer implemented method for rendering digital three-dimensional dental models includes receiving a first digital 3D dental model including a first dental information of a patient; receiving a second digital 3D dental model including a second dental information of the patient; generating, in the digital 3D space, a superimposed model by superimposing one of the first digital 3D dental model or the second digital 3D dental model on another of the second digital 3D dental model or the first digital 3D dental model; and arranging a 2D controller and the superimposed model relative to each other such that a position of the 2D controller defines a boundary that demarcates the superimposed model between a first zone and a second zone.

The invention discloses a tooth socket model generation method and device based on personalized mechanical feedback, and the method comprises the steps: generating initial tooth models and tooth correction schemes of a plurality of object samples according to the oral scanning data of the plurality of object samples, and then generating a basic tooth socket model of each correction step; constructing a tooth socket system finite element model of each correction step of each object sample; performing optimization calculation through a multi-objective optimization calculation model to obtain an optimized tooth socket model of each correction step of each object sample; taking the initial tooth models and the orthodontic schemes of the plurality of object samples as input, taking the optimized tooth socket model of each orthodontic step of the plurality of object samples as output, and training a deep learning model; and after the initial tooth model and the orthodontic scheme of the target object are obtained, inputting the initial tooth model and the orthodontic scheme into the trained deep learning model to obtain the optimized tooth socket model of the target object. According to the method, the personalized optimized tooth socket model can be quickly generated.

Embodiments of the present application relate to the field of digital processing, and disclose a display method and device of a hard palate appliance, an electronic device and a storage medium. The display method of the hard palate appliance in the present application comprises: obtaining information of a digital dental model, the information of the digital dental model at least including a maxillary tooth grid, a hard palate grid and a bite direction in tooth data of a case; calculating control points of teeth with preset numbers in the maxillary tooth grid; obtaining a grid model of a lower surface according to the control points and the hard palate grid; obtaining a grid model of an upper surface according to the grid model of the lower surface and the bite direction; generating a display model of the hard palate appliance according to the grid model of the lower surface and the grid model of the upper surface; and displaying the display model of the hard palate appliance. In the embodiments of the present application, the morphological characteristics of the hard palate appliance can be displayed.

The utility model relates to the technical field of dental model trays, in particular to a dental model tray which comprises two supporting plates which are bilaterally symmetrical, a fixing block is mounted on the right side of the upper side of the left side supporting plate; the same fixing block is arranged on the left side of the upper side of the right side supporting plate; a connecting rod is mounted between the two fixing blocks; all the mechanisms mounted on the two supporting plates are the same; a rotating mechanism is mounted on the upper side of the supporting plate, and a dental cast disc I is mounted on the upper side of the rotating mechanism; dental cast plates II are symmetrically mounted on the front side of the dental cast plate I; when the rotating mechanism needs to be used, the bolt is unscrewed, then the two rotating plates can be rotated, the two rotating plates drive the first dental cast disc and the second dental cast disc to move respectively, then the distance between the two dental cast discs is changed, the oral cavity of a user can be adjusted in a matched mode, and the problem that the dental cast discs are poor in adaptability is solved.

The application provides a combined device of an accessory and a shell-shaped appliance and a manufacturing method thereof, the accessory comprises a tooth accessory fixed on a tooth surface and a dental model accessory fixed on a dental model, the tooth accessory is smaller than the dental model accessory, the occlusal surface of the dental model accessory forms different degrees of occlusal contact with the opposite teeth, so that the shell-shaped appliance generated based on the dental model with the dental model accessory fixed thereon can enhance the seating by using the occlusal force, there is a gap between the occlusal surface of the dental model accessory and the introduction surface of the tooth accessory, so that there is a gap between the accessory cavity of the shell-shaped appliance and the tooth accessory, the appliance has a larger surface area and better elastic performance in the accessory part, which is beneficial to enhance the seating and express the correction force, in addition, the occlusal surface of the dental model accessory can also be designed to have the functions of lifting the occlusion and leading the lower jaw.

The invention relates to the field of three-dimensional modeling, and provides a method, a device and equipment for generating a virtual gingiva, and the method comprises the following steps: obtaining a scanning model of a tooth, and segmenting a tooth model and a gingiva model based on the scanning model; wherein the gingival model covers a gap between adjacent teeth, and a corresponding hole is formed for each tooth model; obtaining the layer number of points influenced by each tooth; wherein the points influenced by the teeth are grid points influenced by tooth movement on the gingival model; the number of layers of the points influenced by the teeth represents the maximum topological hierarchy depth influenced by outward radiation from the edge of the corresponding hole of the tooth model; and according to the layer number of the points influenced by each tooth, carrying out layered movement calculation on the points on the gingival model to generate a virtual gingival model. According to the method, the problem that in the prior art, virtual gingiva generation only depends on gingival line geometric information and ignores real gingiva dynamic deformation characteristics is solved, and the generated virtual gingiva can dynamically adapt to tooth movement and keep biomechanical rationality.

An undercut filling method for digital dental models and a manufacturing method for dental instruments. The undercut filling method can achieve fuller and more anatomically accurate undercut filling for digital dental models. The undercut filling method for digital dental models comprises: acquiring a digital dental model (S101); generating a control point generation model with radius R for each undercut region (S102); moving the control point generation model so that the control point generation model is simultaneously tangent to the buccal and lingual surfaces of two adjacent teeth, and obtaining a set of control points for each tooth on the basis of the tangency points between the control point generation model and each tooth (S103); connecting each set of control points in a predetermined sequence to obtain an undercut control boundary that is used to form an undercut model (S104); interconnecting two undercut control boundaries to generate a corresponding digital undercut model (S105); and performing filling processing on the digital dental model according to the digital undercut model (S106).