269 results about "Tooth crown" patented technology

The invention discloses a high-precision and automatic dental crown generation method. The method comprises seven steps of oral cavity three-dimensional data acquisition, full-mouth tooth semantic segmentation, upper and lower jaw point cloud precise registration, abutment and associated gingiva precise segmentation and trimming, abutment surrounding environment multi-tissue segmentation, neck-edge line secondary precise detection, and dental crown generation and multi-dimensional refinement. The method comprises the steps of oral cavity three-dimensional data acquisition, full-mouth tooth semantic segmentation, upper and lower jaw point cloud precise registration, abutment and associated gingiva precise segmentation and trimming, abutment surrounding environment multi-tissue segmentation, neck-edge line secondary precise detection and dental crown generation. Through combination of deep learning and a point cloud algorithm, high-precision segmentation of teeth and gingiva and precise reduction of an occlusion relationship are realized, an oral anatomical feature library and a clinical repair standard are fused, and through multi-dimensional fine adjustment optimization, a dental crown 3D model which is high in fitting degree, harmonious in occlusion and capable of meeting clinical requirements is generated. The method is full-process automatic, greatly improves efficiency, reduces operation threshold, reduces material waste and diagnosis and treatment cost, remarkably improves repair success rate, and is suitable for various oral repair scenes.

A dental restoration system (1) for restoring a tooth at least during healing of an implant structure (5) placed in a jaw of a patient, comprising a crown base (3) and a locking member (2). The crown base (2) is configured to be positioned on a gingiva former (4) mounted to the implant structure (5). The locking member (2) has a contact surface (212) and a securing structure (24) configured to be secured to the gingiva former (4). The crown base (3) has a through hole (31) configured to receive the locking member (2) such that the contact surface (212) of the locking member (2) contacts the crown base (3) and the securing structure (24) extends at least partially out of the crown base (3). The crown base (3) is made of a base material configured to be combined with a crown material used for building a crown (6).

The application relates to a diamond compact, which comprises a tooth sleeve, the cross section of the tooth sleeve is arranged in a circular ring, a blocking disc is coaxially fixed to an opening of one end of the tooth sleeve, a tooth lock body is fixed to the inner side of the blocking disc, a tooth body is provided with a lock groove at one end, a tooth crown is fixed to the other end, the tooth body is installed in the tooth sleeve, the tooth lock body is axially locked with the lock groove, and the tooth body can rotate relative to the tooth lock body. The tooth body can rotate around the tooth sleeve, the position of the tooth crown in contact with the rock is continuously changed, the abrasion of the same position of the tooth crown is reduced, the probability of sudden rupture of the tooth crown is greatly reduced, the cutting edge can be kept sharp for a long time, the service life of the compact is prolonged, and the drilling speed and footage of the PDC drill bit are improved.

The invention relates to the technical field of dental crown data processing, and discloses a dental crown feature point extraction method, device and equipment and a medium, and the method comprises the steps: obtaining dental jaw point cloud data of a target patient, carrying out the point cloud grid reconstruction of the dental jaw point cloud data, and generating a three-dimensional dental crown digital model; performing dental region segmentation on the three-dimensional dental crown digital model to obtain an independent dental crown model of each tooth, and constructing a local coordinate system corresponding to the independent dental crown model; performing spatial registration on the independent dental crown model according to the local coordinate system to obtain a target dental crown model, and extracting an initial dental crown feature matrix according to the target dental crown model; performing adaptive sampling on the initial dental crown feature matrix to obtain dental crown sampling vertexes, and performing double-branch offset prediction according to the dental crown sampling vertexes to obtain an offset point cluster; and calculating a point cluster clustering center point of the offset point cluster, and determining a dental crown feature point according to the point cluster clustering center point. According to the method, the extraction efficiency and accuracy of the dental crown feature points can be improved.

This invention relates to the field of implant bridging technology, specifically to a bridging-type implant superstructure restoration. It includes a support layer structure, which is fixed to the jawbone by a plurality of implant screws rotatably mounted below it. A plurality of crowns are mounted above the support layer structure, with the support layer structure positioned between the crowns and the jawbone. The support layer structure absorbs part of the occlusal impact force generated by the crowns from top to bottom. Fixing components are disposed inside the crowns, securing them above the support layer structure. The fixing components are coaxially arranged with the implant screws. The support layer structure, through the fixing components, restricts the installation orientation of the crowns, ensuring that the crown axis remains parallel to the jawbone surface. The lower and upper clamps of this invention are fixedly connected by two staggered support rods. When the lower and upper clamps approach each other, they compress the two support rods, causing lateral deformation and absorbing the occlusal impact force.

The invention relates to the technical field of data processing, and discloses a tooth three-dimensional model parameterization description method, which comprises the following steps: carrying out standardization processing on local point cloud data of teeth to obtain three-dimensional model data of the teeth; meshing the three-dimensional model data to obtain triangular mesh model data of the teeth; integrating a dental crown edge, an occlusal surface and a root boundary region in the triangular mesh model to obtain a key feature region of the tooth; according to curvature change characteristics in the key feature region, identifying anatomical mark points of the teeth, and removing noise points in the anatomical mark points to obtain a feature point set of the teeth; mapping the feature point set to a two-dimensional parameter space, generating a continuous parameterized surface through radial basis function interpolation, and performing geometric reconstruction on the parameterized surface to obtain a parameterized description model of the tooth; outputting the parameterized description model as parameterized description of the teeth; according to the method, the parameterized description efficiency of the tooth three-dimensional model can be improved.

This application belongs to the field of medical devices and relates to an intraoral drug delivery device. The drug delivery device includes a substrate that can be disposed on a tooth crown. The substrate has a drug storage unit. When the substrate is disposed on the tooth crown, the drug storage unit can release drug outwards. Alternatively, the drug delivery device includes an adhesive layer that can adhere to the tooth crown, the adhesive layer containing a drug mixture. By disposing the substrate on the tooth crown and having the drug storage unit disposed therein, the drug can be released, providing therapeutic or nursing effects to the tooth crown, oral cavity, or body.

Dental restoration technologies include dental prosthesis components such as implants, abutments, crowns, and the like that are mapped to a patient's mouth prior to and during installation. Fabricating at least a portion of one or more components of the dental prosthesis using a fully calibrated and characterized fabricator can reduce sources of error that affect the success of fabrication and installation processes. The components of the dental prosthesis are represented by library files that are tailored to reflect particular characteristics of the components of the prosthesis to be fabricated, the fabricator, the material used during fabrication, and / or the environment surrounding the fabricator. The library files may be determined based on an acquired scan of the patient and / or based on inputs received from a user during the design process. The library files may be generated using virtual modeling techniques, and / or based on a component design that falls within pre-determined parameters.

The application discloses a kind of based on photosensitive bioceramics deciduous tooth additive manufacturing forming process, it is related to ceramic deciduous tooth manufacturing technical field, comprising the following steps: using oral scanner to collect children's dental three-dimensional data, generate deciduous tooth restoration three-dimensional data model and export STL format deciduous tooth repair model;Using photosensitive liquid bioceramic composite material, through DLP photocuring 3D printing into initial blank, again through blue light three-stage resolidification and get blank body.In the process, the morphological characteristics of adjacent healthy deciduous teeth can be accurately extracted, and the crown height correction coefficient is automatically matched according to the age of the child, effectively compensating for the size deviation of the unerupted deciduous teeth, ensuring that the size error of the restoration is small, adjusting the occlusal surface morphology of the restoration according to the actual data of the teeth at the same time, making the occlusal contact area ratio higher, and reserving occlusal buffer space to avoid excessive local stress, significantly improving the mastication comfort and durability of the restoration.

The utility model discloses a dental crown fixing abutment structure convenient to disassemble, which relates to the technical field of medical equipment and comprises an implant retention screw, an abutment fixing seat is arranged on the outer side of the top of the implant retention screw, an abutment is butted on the abutment fixing seat, and a locking screw is arranged in the abutment. According to the dental crown fixing abutment structure convenient to disassemble, the abutment and the dental crown can be assembled and disassembled through fixing and disassembling of the locking screws, and the situation that the abutment is repeatedly taken and worn, mechanical stimulation is caused to gingival tissue when the abutment is taken off and worn, and local inflammatory response is induced is effectively avoided; multiple times of confirmation of in-position precision in the repeated wearing and taking-off process of the abutment are avoided, and the reworking frequency is reduced.

To provide a dental set for open bite treatment, which can easily depress molars in a short period of time without causing extrusion of front teeth when it is necessary to depress molars in open bite treatment, thereby enabling open bite treatment. [Solution] The dental set for open bite treatment has a plurality of brackets (201) attached to the patient's maxillary or mandibular teeth, an orthodontic wire (11) attached to these brackets, and an intermaxillary elastic (400). When indenting a patient's maxillary molars, the intermaxillary elastic is stretched by attaching the orthodontic wire to the bracket attached to the crown of the maxillary canine from above and stretching it, then hooking it from below to the bracket attached to the crown of the mandibular canine, and further hooking it onto a bondable tube (202) attached to the crown of the mandibular first molar. The same applies when indenting a patient's mandibular molars.

The application provides a three-dimensional implant crown intelligent selection and generation method based on U-Net, comprising the following steps: converting a three-dimensional tooth model in STL format into a high-resolution two-dimensional projection image; taking a U-Net network structure with VGG16 as a backbone network, combining a bar pooling module, and designing a neural network model for accurately capturing tooth sequential arrangement features; training the neural network model by using an adaptive learning rate adjustment strategy and a cosine annealing learning rate scheduling strategy, and performing semantic segmentation on the two-dimensional projection image to obtain a 2D tooth classification result image; identifying missing tooth labels based on the 2D tooth classification result image, calculating the center points of left and right adjacent teeth of the missing tooth, calculating the center position coordinates of the missing tooth in the 2D image through the center points of the left and right adjacent teeth, and mapping the center position coordinates to a three-dimensional space to obtain three-dimensional center coordinates of the missing tooth; and moving the template tooth center point to the three-dimensional center coordinates of the missing tooth to generate a three-dimensional crown model that matches the missing tooth position.

This invention discloses an auxiliary method for orthodontic treatment planning based on a digital twin of tooth movement, belonging to the field of orthodontic auxiliary technology. The method includes acquiring cone-beam computed tomography (CBCT) data of the patient's oral cavity and three-dimensional point cloud data of the tooth crown surface to construct a three-dimensional geometric model of the tooth-periodontal ligament-alveolar bone. The three-dimensional geometric model is discretized into a finite element mesh, and based on the patient's age, periodontal biotype, and CT grayscale value, periodontal ligament viscoelastic parameters, alveolar bone grayscale-mechanical mapping parameters, and tooth linear elastic constants are assigned to form an individualized digital twin of tooth movement. A target displacement vector is determined within the individualized digital twin of tooth movement, and the orthodontic force vector and anchorage requirement index are calculated. The anchorage requirement index is used to assist in the design of the orthodontic treatment plan. This invention can effectively improve the accuracy, predictability, and personalization of orthodontic treatment plan design, reduce reliance on experience, and optimize the overall treatment effect.

The invention discloses a bionic personalized abutment horizontal bridge, and relates to the related field of dentistry, the bionic personalized abutment horizontal bridge comprises a horizontal bridge body, the bottom of the horizontal bridge body is locked in an alveolar bone through a plurality of groups of locking blocks arranged at different angles, the inner side of an abutment part is in threaded connection with an implant, the lower end of the implant is provided with a fitting block, and the fitting block is provided with a plurality of locking blocks. The top of the fixed vertical rod is in contact with the expansion mechanism, and the expansion mechanism is arranged on the inner side of the implant, so that the inner side of the lower end of the dental crown body is fully filled with the outer side of the upper end of the implant through an adhesive. According to the bionic personalized abutment horizontal bridge, through the collaborative design of the locking mechanism and the expansion mechanism, double key improvements are achieved; a fixed vertical rod pushes a butt-joint rod of an expansion mechanism, so that an extrusion conical block opens extension fins which are distributed at equal angles, an adhesive which is connected with a conical attaching table at the top of a threaded rod and the inner side of a dental crown body is fully extruded and filled, and a tiny gap caused by uneven coating is eliminated.

The application relates to the technical field of image processing, and provides a tooth detection method and device, a terminal device and a readable storage medium, the method comprising the following steps: acquiring a CT image of a patient's oral cavity and preprocessing the CT image to obtain a three-dimensional tooth region image; performing post-processing by using a tooth detection model to obtain a tooth detection result of the patient; wherein the tooth detection model comprises a full-tooth segmenter, a tooth crown and root segmenter and a tooth crown classifier; when the post-processing is performed, the three-dimensional tooth region image is input into the full-tooth segmenter to obtain a full-tooth segmentation result; the full-tooth segmentation result and the CT image are input into the tooth crown and root segmenter to obtain a tooth crown and root segmentation result; and then the tooth crown and root segmentation result and the CT image are input into the tooth crown classifier to obtain a tooth crown classification result. The method can accurately obtain tooth segmentation information and missing tooth position information of the patient, and has high calculation speed.

The invention discloses an enamel secretion prolonging and thickness increasing method based on KLK4 alpha protein, and relates to the technical field of biomedicine and dental materials.According to the method, expression of the KLK4 alpha protein is specifically regulated and controlled, forward intervention in the secretion period in the enamel development process is achieved, synthesis and accumulation of enamel matrix protein are directly promoted, and the effect of prolonging the secretion period of the enamel is achieved. A recombinant lentiviral vector mediated gene transduction technology is utilized to specifically introduce the KLK4alpha gene into a dental embryo glazing cell and realize overexpression, and the expressed KLK4alpha protein remarkably delays the process of transformation from a secretion period to a mature period by regulating the secretion activity of the glazing cell, so that the expression level of the KLK4alpha protein is improved, and the expression level of the KLK4alpha protein is improved. The time sequence intervention effectively prolongs the secretion window period of key organic matrix components such as glaze protein, glaze protein and the like, so that before mineralization is started, the total amount of extracellular matrix net racks is substantially increased, a space is provided for nucleation of hydroxyapatite crystals, and finally, the thickness of a mineral phase is remarkably increased; and the protection performance of the dental crown structure is enhanced.

1. The name of the design product: horizontal rapid sintering furnace. 2. The use of the design product: equipment for sintering after processing of dentures, crowns, bridges, etc. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

Provided is a method for evaluating the fixed state of a fixed dental crown restoration, the method including: applying elastic wave stimulation to a fixed dental crown restoration; acquiring, as a time-history waveform, a response waveform of the fixed dental crown restoration receiving the elastic wave stimulation; evaluating frequency response characteristics from the acquired time-history waveform; inputting the frequency response characteristics to a trained anomaly detection model to obtain an anomaly score as an inference result; and determining a fixed state of the fixed dental crown restoration from the anomaly score. The anomaly score relates to a state in which the fixed dental crown restoration is fixed to an abutment tooth or an implant body.

The application discloses an expanding root canal filling medical device combination based on a dental root tip biological seal and application. The medical device combination comprises a sealant combination and a titanium material root canal plug tip, the sealant combination is composed of liquid agent, A component powder and B component powder which are mutually isolated before use, the A component powder comprises 75-95% of tricalcium silicate and 5-25% of beta tricalcium phosphate, the B component powder comprises 45-55% of nano zirconium dioxide, 44.7-52% of calcium hydroxide and 0.3-3% of calcium oxide; a root canal section surface of the root canal plug tip is provided with a horizontal screw thread, a screw thread groove of the screw thread is used for filling the prepared sealant, and a crown section surface is provided with a retaining groove section. The medical device combination solves the problems of root canal treatment failure or poor long-term curative effect caused by volume shrinkage after filling of the existing sealant and gutta-percha tip, and can realize high safety, high biocompatibility, high quality and high density root canal filling.

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

This specification discloses a method, apparatus, and system for processing three-dimensional tooth images. The method includes: acquiring a 3D original image containing teeth; identifying tooth voxel regions from the 3D original image; selecting crown feature voxels from the tooth voxel regions based on the grayscale information of the crown; determining a crown mask based on the crown feature voxels using morphological methods; and segmenting each tooth from the tooth voxel regions according to the mask to obtain a tooth segmentation result. This method uses morphological methods to determine the crown mask to be compatible with the actual dentition, resulting in high accuracy when segmenting each tooth from the tooth voxel regions according to the mask. This solution is highly adaptable to cases of malocclusion or tooth defects. This solution can segment individual teeth from three-dimensional tooth images fully automatically or with minimal manual assistance, achieving high segmentation efficiency and accuracy.

The application provides a novel dental crown structure, which comprises an inner crown body, an outer porcelain sheet arranged on the inner crown body, and a connecting assembly arranged between the inner crown body and the outer porcelain sheet, wherein the connecting assembly comprises a connecting groove arranged on one side of the outer porcelain sheet close to the inner crown body, and a bonding layer arranged between the connecting groove and the inner crown body, the bonding layer is made of resin, and the inner crown body matches and extends into the connecting groove. The application forms a fixed connection between the inner crown body and the outer porcelain sheet by arranging the connecting assembly therebetween, thereby enhancing the connecting strength between the two, effectively dispersing and buffering stress, and effectively avoiding the problems of porcelain collapse and falling off under long-term stress, breaking the limitation of the traditional dental crown structure, greatly improving the service life and repair effect of the dental crown, having significant structural advantages and practical value, and being capable of significantly improving the use experience and satisfaction of users, and facilitating the promotion and implementation.

Dental matrices and crowns are disclosed for making dental veneers and crowns on a tooth. The dental matrix is adapted for the specific tooth type (e.g., premolar, molar, canine, incisor, palatal, lingual) being treated in a single treatment, which results in a veneer on the tooth, which may then be resurfaced, for an aesthetically pleasing appearance. A dental matrix for forming a crown on a tooth includes a body having an expandable tab, which allows the diameter of an opening to be expanded for removal of the matrix from the formed crown.

One aspect of this application provides a method for manufacturing a shell-shaped orthodontic appliance, comprising: manufacturing a male mold having anti-wrinkle features, comprising a plurality of crowns and at least a portion of the gingiva, wherein the male mold having anti-wrinkle features has at least one protruding anti-wrinkle feature between the gingival line and the bottom surface, wherein the position of the anti-wrinkle feature is determined based on the location where wrinkles may form during film pressing; and pressing a female mold onto the male mold having anti-wrinkle features using a thermoforming process to form a cavity accommodating the anti-wrinkle features.

The invention relates to a cleaning apparatus, in particular for cleaning surfaces in the mouth, having at least one cleaning device for molars that can be guided over at least one jaw arch, and at least one cleaning device for incisors; wherein actuating devices for the movement of the cleaning devices are provided in the form of actuating rods which extend from the cleaning apparatus to the cleaning device, are extendable and retractable, and can be adjusted with regard to their lateral angle; wherein at least the at least one cleaning device for the molars has at least one clamping device which points toward at least one crown and is extendable and retractable, and is used to fix the cleaning device between two opposing jaw arches and to adjust the distance between the jaw arches.

The invention relates to the technical field of three-dimensional image processing, and discloses a virtual gingiva real-time generation method, system, device and medium, the method comprises the following steps: obtaining oral cavity three-dimensional data of a target patient, segmenting and repairing the oral cavity three-dimensional data to obtain a local coordinate system and a dental crown model of each tooth of the target patient, acquiring boundary points of the dental crown model of each tooth, calculating to obtain a lingual control point and a lip control point of the target patient according to the boundary points, generating a lingual gingival line and a lip gingival line according to the lingual control point, the lip control point and the local coordinate system, and projecting the lingual gingival line and the lip gingival line to a preset projection plane to obtain the dental crown model of the target patient. The method comprises the steps of obtaining a preset projection plane, fitting a preset target projection point on the preset projection plane to obtain a virtual gingival bottom base line, constructing a gingival curved surface grid according to a lingual side gingival line, a lip side gingival line and the virtual gingival bottom base line, and generating a virtual gingival of a target patient according to the gingival curved surface grid, so that the accuracy of the generated virtual gingival effect is improved.

The utility model discloses a dental implant fixing and connecting device which comprises an implant used for fixing a dental crown component, the dental crown component comprises a dental crown main body and a dental crown cap head, a bulge is arranged at the bottom of the dental crown main body, and a circular truncated cone is fixed at the top of the implant; the base table is connected with the circular table in a screwed mode through threads and comprises a boss, a fixing circular plate, a limiting column and a fixing cap connected with the limiting column in a combined mode, and the fixing circular plate is located between the boss and the limiting column; a convex ring is fixed on the surface of the bottom of the reinforcing table; through the designed reinforcing table and the reinforcing screw, the base table and the implant are reinforced, the base table is prevented from loosening, the limiting column penetrates through the reinforcing table and the dental crown main body, the reinforcing table and the dental crown main body are limited, the stability of the dental crown main body is improved, and when the whole dental crown needs to be disassembled, only the dental crown cap head needs to be damaged; the whole bottom of the dental crown is prevented from being damaged, and then alveolar bones and gingiva are prevented from being damaged.

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

The dental implant structure with the zero-degree composite abutment comprises an implant, the zero-degree composite abutment, a compression screw and a dental crown, the implant is in threaded connection with the zero-degree composite abutment, and the zero-degree composite abutment is in inserted fit with the dental crown and then compressed on the zero-degree composite abutment by the compression screw, so that full-screw connection is realized; and the defects caused by full glue connection and full clamping connection are avoided. The dental implant structure disclosed by the utility model is stable and reliable in overall connection strength, and a dental crown can be directly mounted on a zero-degree composite abutment.