436 results about "Jaw bone" patented technology

The invention discloses a three-dimensional stomatognathic model reconstruction system based on multi-modal data fusion. The system comprises a multi-modal data input unit, a template deformation reconstruction unit, a registration fusion unit, a multi-source data integration unit and an output unit. Through fusion processing of a CBCT image, an oral cavity vision measurement model and facial scanning data, a body deformation algorithm is adopted to couple biomechanical characteristics to realize craniojaw template deformation, and a non-rigid ICP algorithm is combined for dynamic regulation and control to realize facial template adaptation. A deep neural network is innovatively constructed to segment CBCT gingival data, the CBCT gingival data is fused with an oral cavity vision measurement model, and high-precision tooth reconstruction is realized by applying a differential geometry multi-scale curvature field segmentation and adversarial edge optimization technology. Through a composite registration strategy combining adaptive rigid registration and non-rigid registration, an occlusal plane constraint mechanism and an orbital curvature extreme point matching algorithm are innovatively introduced, finally, multi-source data high-precision registration fusion is realized, and a three-dimensional oral-jaw system model with anatomical structure integrity and clinical precision can be generated.

The invention belongs to the technical field of hydrogel, and relates to piezoelectric / conductive integrated hydrogel for jaw defect repair, which is prepared from methylacryloyl protein, zwitterionic monomer and titanate piezoelectric particles through ultraviolet crosslinking under the action of a crosslinking agent and a photoinitiator, the hydrogel comprises, by mass, 1.0%-10% of methacrylated protein, 1.0%-10% of zwitterionic monomers, 1.0%-10% of titanate piezoelectric particles and 0.1%-5% of an initiator, and the volume fraction of an accelerant is 0.05%-1.0%. The hydrogel disclosed by the invention has excellent mechanical strength and certain flexibility, can realize piezoelectric and conductive functions of the hydrogel, can effectively promote proliferation, differentiation and mineralization of bone cells under the action of an electric field, accelerates bone tissue repair, and has a more remarkable bone regeneration effect compared with a non-electrical stimulation material in the prior art.

The invention provides an oral implant operation registration method and system, and the method comprises the steps: obtaining first CBCT data and second CBCT data, a registration device is provided with a plurality of groove points, and the second CBCT data is provided with an image coordinate system; arranging an optical tracking array on the dental region, and determining a first transformation matrix between a binocular camera coordinate system and a dental jaw bone reference coordinate system through a binocular camera; determining a first pose matrix of the needle point of the drill needle in the planting mobile phone coordinate system; the tip of the optical probe and the binocular camera are utilized to perform sampling operation on each groove point on the registration device to obtain a plurality of registration points; determining a second transformation matrix according to the plurality of registration points and each groove point; and determining a second pose matrix according to the first transformation matrix, the second transformation matrix, the first pose matrix and a transformation matrix between the coordinate system of the binocular camera and the coordinate system of the implant mobile phone, and preparing a hole in the dental region through the tip of the drill point. By adopting the scheme, the planting precision of the implant can be improved.

The invention discloses an edentulous jaw dental implant positioning method combined with depth variation reasoning. The method comprises the following steps: S1, generating optimized medical image data; s2, generating a jaw bone three-dimensional reconstruction model of the edentulous jaw patient; s3, generating anatomical feature data; s4, generating a preliminary implant positioning scheme; s5, generating a local bone reconstruction simulation result; s6, performing dynamic interaction on a local bone reconstruction simulation result and the preliminary implant positioning scheme, optimizing the preliminary implant positioning scheme through a depth variation inference model, and generating an implant optimized positioning scheme including mechanical stability and biomechanical performance evaluation; and S7, based on the implant optimization positioning scheme, generating implant guide plate design data and surgical navigation data in combination with the jaw bone three-dimensional reconstruction model of the patient. According to the method, the final implant positioning point obtains a globally optimal solution in the aspects of long-term stability and biological adaptability.

The invention provides a cranio-maxillofacial hard tissue deletion repair method based on a general repair model, and relates to the technical field of jaw defect reconstruction, the method comprises the following steps: constructing a cranio-maxillofacial hard tissue general repair model by using a plug-and-play conditional attention mechanism and a query generator based on curvature perception; inputting the cranio-maxillofacial hard tissue point cloud data into a cranio-maxillofacial hard tissue general repair model, and training by using a weighted loss function to obtain a trained cranio-maxillofacial hard tissue general repair model; performing de-noising processing on the missing repair point cloud features to obtain de-noised missing repair point cloud features; and carrying out point cloud gridding modeling processing by using the denoised deletion repair point cloud features to obtain a cranio-maxillofacial hard tissue deletion repair result, and completing the deletion repair of the cranio-maxillofacial hard tissue. The problem that repair and reconstruction of hard tissues at the head part are difficult to solve uniformly is solved.

The invention relates to an oral and maxillofacial implant repair path generation system based on a CBCT image, in particular to the field of computer aided design of surgical operations, and the scheme comprises the following steps: constructing a high-quality training data set through multi-source data aggregation and intelligent labeling enhancement; training by using the mixed model to generate a high-precision jaw segmentation model; the segmentation parameters are dynamically adjusted in combination with real-time feedback in preoperative planning, and a personalized optimization result is output; the model is continuously updated and the data strategy is optimized by means of a closed-loop feedback mechanism, so that the planning accuracy, the self-adaptability and the clinical efficiency of oral maxillofacial implant restoration are comprehensively improved, and the whole process from data to decision making is intelligentized.

The invention relates to the technical field of information, and particularly provides a complete denture arrangement virtual simulation method and system, and the method comprises the steps: obtaining the medical record data of a user; the medical record data comprises edentulous jaw soft and hard tissue data, jaw bone data, alveolar ridge morphological parameters, jaw position relation data and facial feature data; determining an initial dental arch curve based on the medical record data; inputting the initial dental arch curve and preset aesthetic parameters into a preset deep learning model to obtain a plurality of initial tooth arrangement schemes; screening the plurality of initial tooth arrangement schemes according to tooth arrangement constraint conditions to obtain tooth arrangement schemes meeting constraints; the tooth position and angle of each tooth arrangement scheme meeting the constraint are adjusted until the preset occlusion balance condition is met, and the first tooth arrangement scheme is obtained, so that the tooth arrangement scheme efficiency of the complete dentures can be improved on the premise that the quality of the tooth arrangement scheme of the complete dentures is guaranteed.

The invention discloses a jaw cystic lesion recognition method, device and equipment, a medium and a product, and relates to the field of jaw cystic lesions. The method comprises the following steps: marking tooth and jaw regions in an oral cavity cone beam CT image, and selecting a region of interest to obtain an interested marked image; labeling cyst category labels generated by jaw cystic lesions in the interested labeling images, and forming a training set; constructing a deep learning model introducing an attention mechanism; the attention mechanism introduces relative positions of cysts and teeth as interested features; training a deep learning model by using the training set to obtain a jaw cystic lesion recognition model; and marking tooth and jaw regions in a to-be-identified oral cavity cone beam CT image of the patient with the jaw cystic lesion, inputting the marked image of interest after marking the tooth and jaw regions into the jaw cystic lesion identification model, and outputting the cyst category of the patient with the jaw cystic lesion. The accuracy and efficiency of jaw cystic lesion diagnosis can be improved.

The invention discloses a bite block for tracheal intubation, and belongs to the technical field of medical instruments. The overall shape of the bottom plate is of an oval structure, and a through groove is formed in the middle of the bottom plate. A bite block support capable of supporting the upper teeth and the lower teeth of the patient is inserted into the through groove; one side of the bottom plate is provided with a clamping groove for placing an air pipe insertion pipe; a clamping groove is formed in the bottom plate, a trachea cannula fixator capable of fixing the placed trachea cannula is arranged at the position of the clamping groove in the bottom plate, and the clamping groove in the bottom plate extends to the outer side area of the bottom plate, so that two protruding parts are formed on the side, provided with the clamping groove, of the bottom plate. The two top plates can be expanded and adjusted through cooperation of the adjusting pipe, the clamping ring, the guide groove and the guide rod, the supporting amplitude in the mouth of a patient can be adjusted, the problems encountered in real medical care can be solved, in the operation process, a series of operation adjustment of lifting of the top plates can be achieved only by repeatedly rotating the adjusting pipe, and the operation efficiency is improved. The operation is simple, and the tendon tissue around the jaw bone of the patient can be moved anytime and anywhere so that the patient can feel uncomfortable due to a fixed posture for a long time.

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

The invention provides an auxiliary tooth separation method and system for minimally invasive tooth extraction, and relates to the technical field of digital surgery in stomatology. According to the method, the oral anatomy three-dimensional electronic model is obtained by performing deep learning segmentation and three-dimensional reconstruction on the preoperative CBCT image, and the real-time spatial position and posture of the jaw bone are updated in combination with laser oral scanning of the preoperative anterior tooth area. On the basis, a three-dimensional simulation model is constructed, tooth division cutting path planning, interference judgment and dislocation space analysis are completed, precise tooth division cutting is implemented by a three-way mechanical arm along the planned path, and the safe and controllable automatic tooth extraction and tooth division process is completed in cooperation with water cooling and real-time track correction.

The utility model relates to the field of medical instruments, in particular to a jaw cyst windowing and pressure reducing device. The device comprises a guide part, a connecting part and a base which are sequentially arranged from top to bottom. And the small-diameter section of the guide part is positioned at the upper part. The connecting part is a cylinder, and the diameter of the connecting part is smaller than that of the bottom of the guide part. The short axis size of the base is larger than the diameter size of the bottom of the guide part. The bottom of the base is provided with a through hole penetrating to the position above the guide part, and a drainage channel is formed. The springback characteristic of soft tissue in the bag cavity is utilized, so that the guide part and the connecting part can be fixed in the bag cavity and cannot fall off; meanwhile, through the elliptic cylindrical base, the base is effectively prevented from entering the bag cavity, the shape of the vestibular groove is met, and the wearing is free of foreign body sensation and more comfortable.

A titanium-zinc mixed structure type degradable jaw bone restoration comprises a titanium alloy force bearing part and a zinc alloy planting part which are printed in a 3D mode, and the titanium alloy force bearing part and the zinc alloy planting part are connected through a connecting part located on the titanium alloy force bearing part and / or the zinc alloy planting part. The titanium alloy part serving as the base is mainly used for bearing force, it is guaranteed that the prosthesis cannot be broken in the using process, the zinc alloy of the upper half part is absorbed in the osteogenesis regulating and controlling process, then bony repair is completed, and planting can be conducted. And the height of the preferable zinc alloy planting part is enough for planting, and meanwhile, the titanium alloy at the lower half part does not influence final planting and can ensure the overall stability.

The invention provides an oral implant surgery planning method and system and a storage medium. The method comprises the steps that an oral CT three-dimensional model is segmented through an oral model segmentation deep learning model to obtain a tooth CT three-dimensional model, a jaw bone CT three-dimensional model, a neural tube CT three-dimensional model and a blood vessel CT three-dimensional model; generating a dental arch curve based on the tooth CT three-dimensional model; missing tooth coordinate data, missing adjacent tooth coordinate data and implantation area coordinate data are obtained through analysis; analyzing to obtain the axial data of the missing adjacent teeth, and analyzing to obtain the axial data of the implant and the coordinate data of the implantation point according to the axial data of the missing adjacent teeth; performing analysis to obtain safe boundary area coordinate data of the implant; and screening in the implant database to obtain the implant type. A key anatomical structure in an oral cavity CT three-dimensional model is automatically identified and segmented through an oral cavity model segmentation deep learning model, a safety boundary area is calculated, an optimal implant scheme is screened out based on an implant library, and decision support is provided for doctors.

The invention belongs to the technical field of hydrogel, and particularly relates to conductive hydrogel for jaw defect repair, which is prepared from methylacryloyl polysaccharide, an ionic liquid monomer and a conductive polymer material through ultraviolet light crosslinking under the action of a crosslinking agent and a photoinitiator, the hydrogel contains, by mass, 1.0%-5% of methylacryloyl polysaccharide and 0.1%-0.5% of a photoinitiator, and the volume fractions of an ionic liquid monomer, a conductive polymer material and a cross-linking agent are 1.0%-10%, 1%-20% and 0.5%-1% respectively. The mechanical property and the stability of the conductive hydrogel are enhanced, and attachment, growth and expansion of cells are facilitated. The modification also improves ion exchange at the interface of the cells and the material, and promotes the mineralization process, so that firmer bone tissues are formed, and the repair of jaw defects is facilitated; electrical stimulation is applied through the conductive network, a bio-electricity signal is simulated, proliferation and differentiation of osteoblasts are enhanced, and bone tissue regeneration is promoted.

Improved systems, methods, and devices for treating sleep apnea are provided herein. In one aspect, an intraoral appliance for treating sleep apnea in a patient comprises an appliance shell comprising a plurality of cavities shaped to receive teeth of a jaw of the patient. The appliance shell can comprise an advancement structure arranged to interact with an opposing jaw of the patient so as to displace the lower jaw anteriorly relative to the upper jaw. The plurality of cavities can comprise cavity geometries shaped to reduce repositioning of one or more received teeth elicited by displacement of the lower jaw anteriorly relative to the upper jaw.

The present invention relates to a palatal and jaw expansion device (1) comprising at least one screw (2), at least two blocks (4) that are positioned on the screw (2) so as to move on the screw (2), at least one stabilization rod (3) whereon the blocks 10(4) are seated, a movement mechanism (5) disposed at the center of the screw (2) and an arm (6) that has a fixed end (8) fixed to the movement mechanism (5) perpendicularly to the horizontal axis where the screw (2) extends; when force is applied on the free end (7), it rotates the movement mechanism (5) whereon the arm (6) is fixed and the screw (2) around the horizontal axis where the screw (2) extends, 15 enabling the blocks (4) to move on the screw (2).

The invention relates to a jaw traction device which comprises a support, a lead screw, a fixed traction plate, a movable traction plate and a driving assembly. When an operator presses the button shaft, the ejector rod shaft can be driven to rotate around the axis of the ejector rod shaft through clamping rotation fit between the second clamping part and the first clamping part, then the lead screw is driven to rotate around the axis of the lead screw through meshing transmission between the ejector rod shaft and the lead screw, and therefore the movable traction plate is driven to move along the axis of the lead screw. Furthermore, the distance between the movable traction plate and the fixed traction plate is adjustable, and the movable traction plate and the fixed traction plate can prop open and keep the two ends of the jaw bone by utilizing the screwing self-locking limiting between the screw rod and the movable traction plate; the jaw traction device is designed to be completely implanted into the cheek skin tissue, the operative wound is minimized, accurate traction can be achieved, controllable traction of the jaw is achieved, the living quality of a patient is improved in the traction process, and postoperative nursing difficulty is reduced.

The invention discloses an intelligent auxiliary decision-making system for an orthodontic scheme based on multi-source data, and relates to the technical field of orthodontics, and the system comprises three core units: a multi-source data platform construction unit realizes structured storage and efficient interaction of data; the problem list and diagnosis intelligent generation unit analyzes tooth, jaw and soft tissue data based on three-dimensional space dimensions, automatically compares standard reference values to generate a problem list and a structured diagnosis conclusion, and provides a quantitative basis; the intelligent recommendation unit for the orthodontic treatment scheme fuses multi-modal data features, generates a preliminary scheme by using a deep learning model, combines similar case retrieval and knowledge graph optimization logic, and continuously improves recommendation accuracy through a clinical feedback closed loop. Three-dimensional fusion and automatic diagnosis of multi-source data are realized, subjective experience deviation is reduced, diagnosis and treatment efficiency is improved, and standardized and personalized auxiliary decision support is provided for orthodontics doctors.

The disclosed technology provides for setting up teeth, such as dentures and dental appliances, based on motion data. A method can include receiving, by a computing system, a digital representation of the patient's jaw movement, receiving a digital model of at least a portion of the patient's upper and lower teeth, receiving user input indicating selection of at least a first tooth in the digital model as moveable, at least a second tooth as fixed, and at least a third tooth as ignored, moving the at least portion of the upper teeth and the lower teeth along movement pathways indicated by the digital representation of jaw movement, and automatically adjusting a position of the selected first tooth based on detecting the position of the selected at least first tooth as colliding or interfering with one or more other teeth represented by the digital model along one of the movement pathways.

The present invention belongs to the technical field of hydrogels, and specifically relates to a conductive hydrogel for repairing jaw defects. The hydrogel is prepared by ultraviolet crosslinking of a methacryloylated polysaccharide, an ionic liquid monomer, and a conductive polymer material under the action of a crosslinker and a photoinitiator. The mass fractions of the methacryloylated polysaccharide and the photoinitiator in the hydrogel are 1.0% to 5% and 0.1% to 0.5%, respectively, and the volume fractions of the ionic liquid monomer, the conductive polymer material, and the crosslinker are 1.0% to 10%, 1% to 20%, and 0.5% to 1%. The conductive hydrogel of the present invention has enhanced mechanical properties and stability, which is conducive to cell attachment, growth, and expansion. This modification also improves ion exchange at the interface between cells and materials, promotes the mineralization process, and thus forms stronger bone tissue, which helps repair jaw defects. Electrical stimulation is applied through its conductive network to simulate bioelectric signals, enhance the proliferation and differentiation of osteoblasts, and promote bone tissue regeneration.

The present invention relates to an implant drill for producing bores in the jaw bone for dental implants, comprising a drill blade element with a blade portion and a connecting portion, which are arranged in the axial direction at opposite ends of the drill blade element; and a holding apparatus with a holding portion and an actuating portion, which are arranged in the axial direction at opposite ends of the holding apparatus, and wherein the holding portion has a slot-shaped receptacle that is mirror-symmetrical relative to the rotation axis, with two mutually parallel receptacle surfaces, wherein the connecting portion of the drill blade element is introducible in the axial direction into the receptacle of the holding portion of the holding apparatus, in order to connect the drill blade element non-rotatably to the holding apparatus.

The invention relates to the technical field of medical image processing and artificial intelligence diagnosis, in particular to an oral and maxillofacial surgery image recognition and diagnosis method and system based on deep learning, and the method comprises the following steps: multi-modal image collection and cooperative preprocessing: collecting an oral and maxillofacial surgery CBCT image, a cone beam CT curved surface tomography image, an oral endoscope image and an ultrasonic image, a standardized multi-modal image data set is obtained through inter-modal registration and an adaptive enhancement algorithm; according to the method, a traditional diagnosis framework of'single-mode image + manual film reading 'is broken through, and a three-order diagnosis logic of'multi-mode image cooperative enhancement-cross-scale feature dynamic fusion-focus typing and risk hierarchical linkage' is innovatively provided; and accurate identification, typing and malignant transformation risk prediction of common oral and maxillofacial surgery diseases (such as jaw cyst, wisdom tooth impediment, temporomandibular joint disorder and maxillofacial tumor) are realized.

The invention provides an edentulous jaw implantation operation teaching system and method based on a virtual reality technology, and the teaching system is a tooth implantation operation training system based on a VR technology, and comprises a personal model module, a virtual operating room module, a user interaction module, and an equipment display module. The personal model module is used for constructing a personalized anatomical model containing an edentulous jaw bone, a neural tube and a safety area by using CT data of a patient; the virtual operating room module builds a scene through Unity and builds a high-precision surgical instrument model through three-dimensional design software; the user interaction module is connected with the personal model module and the virtual operating room module, and integrates a collision detection algorithm in a Unity engine to realize virtual instrument interaction and feedback; the equipment display module obtains and displays operation parameters in real time through calculation and early warns risks; according to the invention, key operation parameters can be fed back in real time, students are assisted to deepen understanding of operation procedures, and practical skills and comprehensive ability are improved.

A method for manufacturing a splint or surgical guide for the implantation of at least one dental implant, relating to a part of a guided oral surgery process by which at least one implant is placed or implanted in a patient's jaw to replace the function of one or more natural teeth. The manufacturing method is implemented by a computer program. The object is to improve the implant placement process in an optimal and minimally invasive, as well as more simplified way.

The invention discloses a three-stage CBCT (cone beam computed tomography) maxillofacial panoramic segmentation method based on a Kolmogorov-Arnold representation theorem and a U-Net architecture, and the method can learn a nonlinear activation function and multi-scale feature extraction through fusing position prior, and effectively enhances the feature expression capability. According to the method, a three-stage maxillofacial structure panoramic segmentation framework is designed, wherein in the first stage, coarse segmentation and tooth position calibration are carried out in a low-resolution image by utilizing MC-UKAN; in the second stage, on the original image, a target structure is positioned based on a coarse segmentation result, a K-means clustering algorithm is utilized to divide targets into five classes, and a corresponding network is adopted to perform fine segmentation; and in the third stage, the jawbone and the throat are segmented on the original image by using a lightweight network. And finally, through a probability graph fusion mechanism, generating a complete maxillofacial panoramic segmentation result containing tooth position calibration.

The invention discloses a palatal-side retention subperiosteal implant stent and a manufacturing method thereof. The implant stent comprises a palatal-side connecting plate, a screw hole is formed in one side of the palatal-side connecting plate, a screw fixed to the palatal side is arranged in the screw hole, and a plurality of implant bases are arranged on the other side of the palatal-side connecting plate; the lip-buccal side connecting plate reconstructs a complete jaw bone structure of a patient through scanning data, the lip-buccal side bone surface contour is extracted, a basic support model is obtained after the contour line of the lip-buccal side connecting plate is designed in a three-dimensional model, then through three-dimensional finite element analysis, the layout of the implant abutment is optimized in combination with a stress distribution result and a screw hole site of the lip-buccal side, and the implant abutment is constructed. And then manufacturing the implant stent through 3D printing by adopting a topological optimization method. The device has good mechanical stability and biological adaptability, the minimally invasive concealment of the palatal access is realized, and the device is particularly suitable for the repair requirements of aesthetic areas and complex bone defect cases.

The invention discloses a dental film image-based identification method for an actual occlusion and dislocation occlusion relationship between upper and lower jaws, and relates to the technical field of image identification, and the method can automatically process a large-scale dental film image set by constructing a cloud dental film identification server and combining a cloud connection technology of an image database. And extracting the actual center point coordinate of each tooth, fitting the tooth spacing and calculating the deviation, so that the dentition deviation identification capability is comprehensively improved. Particularly, by introducing calculation and analysis of comprehensive indexes such as a dentition deviation index TDI, an occlusal coverage index OCR and a jaw deflection index BDA, the dislocation condition of the upper jaw and the lower jaw can be efficiently recognized, and different dentition states can be accurately evaluated. According to the automatic recognition method, the time required by manual recognition is greatly shortened, the recognition efficiency and precision are improved, particularly in a clinical scene, the complicated malocclusion condition can be quickly and accurately judged, and a scientific basis is provided for subsequent treatment.

The present invention relates to the field of enhancement of jaw CT images, and particularly relates to a medical image enhancement method and system for jaw cysts based on image processing. The present invention obtains the gray histogram of an image; clusters based on this to obtain gray clusters; and obtains the gray levels of tissue clusters and non-tissue clusters according to the gray distribution and the number of pixel points in the clusters; obtains an edge coefficient according to the gray difference around the pixel point and the difference between the gray levels of other surrounding pixel points and the non-tissue cluster gray level; connects the pixel points according to the edge coefficient difference between the pixel point and the surrounding pixel points to obtain a regional dividing line between the tissue region and the non-tissue region; and enhances the jaw CT image according to the regional dividing line. The present invention can obtain clear edges in the jaw CT image to facilitate relevant personnel to determine the specific location of the jaw cyst.