457 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.

The utility model provides a tooth model kit and a multi-layer root canal therapy practice model. A hard tissue part of a teaching tooth model is made of a colorless transparent printing material, and a soft tissue part of the teaching tooth model is made of a colored printing material. The hard tissue part of the endodontotomy practice model is made of a non-transparent 3D printing material, and the dental pulp part is made of a colored printing material with the color different from that of the hard tissue part. The dental crown part of the root canal therapy practice model is made of a non-transparent printing material, the dental root part is made of a colorless transparent printing material, and the dental pulp part is made of a colorless transparent adhesive body ground printing material. A dental crown part of the multi-layer root canal therapy practice model is made of a non-transparent printing material, a tooth root part is made of a colorless transparent printing material, a semitransparent colored layer with a preset thickness is arranged at the position, close to a dental pulp part, of the tooth root part, and the dental pulp part is made of a colorless transparent adhesive body ground printing material. The tooth model kit provided by the utility model is higher in simulation degree on teeth, and the simulation result is displayed more clearly.

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 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 discloses an intraoral scanning data correction method based on dynamic feature weight adjustment. The method comprises the following steps: S1, acquiring initial intraoral scanning data acquired by intraoral scanning equipment; s2, acquiring full oral cavity three-dimensional model data generated by cone beam computed tomography equipment; s3, extracting three-dimensional model information of a single tooth; s4, performing three-dimensional registration on the three-dimensional model information of the single tooth and a corresponding tooth model in the CBCT data based on a dynamic feature weight adjustment algorithm; s5, generating a full oral cavity correction model; s6, using a physical model generated by warehouse scanning as a verification standard; and S7, outputting the corrected full oral cavity three-dimensional model. According to the method, the problems of precision and consistency in oral three-dimensional scanning data are solved, the precision of the corrected whole oral model is remarkably improved, and the method has high practicability and clinical application value.

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.

The invention discloses a tooth wear evaluation model for evaluating the safety of oral products and a preparation method and application thereof. The tooth wear evaluation model is at least obtained by grinding and polishing the surface of a tooth model, and the tooth model comprises at least one of an animal enamel block model, an animal dentin block model, a tooth-like material dental film model, a full-mouth animal enamel model and a tooth-like material full-mouth tooth model. According to the tooth wear evaluation model, the wear performance of the oral product can be conveniently tested in vitro.

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 present disclosure discusses techniques and systems for separating dental models (101) from a thermoformed film (1001). A separation system can include a separator unit with one or more separator rods (1303) extending from the separator unit. The separator rods can fit within channels formed within the dental model and can be used to pull the dental model apart from a thermoplastic film that is thermoformed over the dental model.

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 cleaning test method, device and system for oral care equipment and a medium, and the method comprises the steps: planning a motion track of the test equipment when a preset three-dimensional tooth model is brushed; controlling the test equipment to drive the oral care equipment to brush the three-dimensional tooth model based on the motion trail; and determining the cleaning efficiency of the oral care equipment, wherein the cleaning efficiency is determined on the basis of at least one of the time consumed for completing brushing of the three-dimensional tooth model and the variable quantity of the cleaning area of the three-dimensional tooth model. The cleaning efficiency of the oral care equipment can be accurately evaluated through at least one of the duration consumed by the cleaning test and the variable quantity of the cleaning area of the three-dimensional tooth model by simulating the process that the user uses the oral care equipment to care the oral cavity, so that the accurate evaluation of the cleaning performance of the oral care equipment is realized, and the user experience is improved. The oral care equipment can be conveniently improved by testers when the cleaning efficiency is relatively low, and the cleaning performance of the oral care equipment is ensured.

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 present disclosure discusses devices and methods for securing dental models (100) to a thermoform plate (200) prior to thermoforming a polymer onto the dental model. The present disclosure also includes a system and method for separating a thermoformed polymer from a thermoform plate and dental model. Additionally, the present disclosure discusses a system capable of automating the process of forming an orthodontic aligner.

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 provides a PTv3-based intelligent automatic tooth arrangement method and device, and the method comprises the steps: collecting three-dimensional tooth point cloud data after orthodontic treatment, carrying out the noise filtering, outlier removal and triangular meshing processing of the point cloud data, and separating a single tooth model through a deep learning segmentation network; carrying out principal component analysis and principal axis alignment on the segmented tooth model, calculating curvature characteristics in combination with normal covariance, and dynamically allocating voxel retention density by adopting a curvature-driven gradient voxel downsampling strategy; generating data pairs before and after simulation orthodontics, and constructing an orthodontics database in combination with displacement direction probability constraint and an adjacent tooth collision punishment mechanism; a PTv3-based double-branch network architecture is constructed as an intelligent automatic tooth arrangement network model, a multi-objective loss function fusing geometric errors, collision constraints and clinical prior is set, and the model is trained through weighted optimization; and inputting the preprocessed tooth point cloud into the trained model, outputting spatial transformation parameters and generating a final arrangement result.

The invention belongs to a tooth deformity quantification method, and provides a three-dimensional tooth jaw model deep coverage deformity quantification method and a related device aiming at the problems that a distance index measurement method for representing an upper and lower jaw coverage relation in an existing three-dimensional tooth jaw model is time-consuming, the measurement precision is difficult to guarantee, and the method excessively depends on subjective judgment of a doctor. Sequentially obtaining a projection point set in the occlusal surface direction of the tooth area, a central point of the projection point set in the occlusal surface direction of each tooth area and a global central point of the tooth model, then calculating a rotation amount based on the data, performing quaternion transformation, obtaining an identification line capable of representing a crest cutting position of each tooth crown, fitting the identification line of each tooth crown, and obtaining a crest cutting position of each tooth crown; the method comprises the following steps: obtaining two tooth crest cutting distribution curves, performing alignment processing on the two tooth crest cutting distribution curves, obtaining a matching point set through resampling, and obtaining a tooth jaw covering horizontal spacing according to the matching point set. The problem of precision loss in a traditional transformation method is effectively avoided, and the precision of tooth pose adjustment is ensured.

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.

Provided are an oral cavity image processing method and oral cavity image processing device. The oral cavity image processing method includes obtaining 3-dimensional oral cavity data by scanning an oral cavity including teeth, generating a base based on the 3-dimensional oral cavity data, generating one or more cylinders that pass through a wall of the base, based on a reference curve of the base, receiving a user input for moving a first cylinder from among the one or more cylinders, moving the first cylinder along the reference curve of the base based on the user input, and generating one or more drain holes by deleting data corresponding to the one or more cylinders from teeth model data including the base.

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.