29 results about "Prosthesis design" patented technology

The invention discloses a dental restoration customization system combining 3D printing with digital modeling, and particularly relates to the technical field of digital modeling, the dental restoration customization system comprises an oral cavity scanning module, a data fusion module, an occlusion mechanical analysis module, a restoration optimization module, a 3D printing module and a feedback monitoring module, the digital model is generated and transmitted to the data fusion module, the data fusion module integrates oral cavity scanning, medical records and dental data to form a personalized oral cavity digital model, and the occlusion mechanical analysis module collects occlusion data, analyzes stress distribution and feeds back the stress distribution to the prosthesis optimization module. The dental restoration optimization module adjusts the design of the restoration according to the oral cavity structure and the occlusion relationship of the patient, the 3D printing module performs high-precision printing according to the optimization design to generate a personalized dental restoration, and the feedback monitoring module monitors the comfort of the restoration through a pressure sensor and feeds back a result to the restoration optimization module for real-time adjustment. And the optimal performance and comfort of the prosthesis are ensured.

The invention discloses a segmentation and evaluation method for a tooth preparation shoulder, relates to the technical field of oral medicine digitization, and aims to solve the problems of low segmentation precision, neglect of anatomical distinguishing, single evaluation, unsmooth boundary and the like of an existing method. The method comprises the following steps: shoulder coarse segmentation: screening three-dimensional grid cube units based on an average curvature, and extracting a coarse segmentation shoulder of a maximum connected domain; carrying out shoulder fine segmentation, extracting inner and outer contours, and then carrying out optimization by using a greedy algorithm (ensuring smoothness through inner energy, and enabling outer energy to fit concave-convex characteristics); performing multi-quadrant division, dividing a mesial region, a distal region, a labial region and a lingual region by taking a long axis of a tooth body as a reference, and fitting boundaries by using a B spline; in the evaluation stage, the gingival height and shoulder width of each region are quantified, the weighted average height is calculated to obtain a basic score, and a final score is obtained by combining region balance deduction. The method is high in segmentation precision, achieves differentiated and comprehensive evaluation, is convenient to operate, and is suitable for oral cavity practical operation teaching and false tooth design scenes.

The invention discloses an artificial shoulder joint prosthesis design method and system, and the method comprises the steps: collecting the motion trail and muscle activation state of a shoulder joint in different motion modes, separating the feature frequency and amplitude of the shoulder joint motion, and extracting a dynamic motion feature set of the shoulder joint; inputting the dynamic motion feature set into a contact mechanical model based on a discrete element method, and simulating contact force and friction behaviors between the shoulder joint prosthesis and the skeleton to obtain contact mechanical characteristics of the prosthesis and the skeleton; and according to the contact mechanical characteristics, generating an initial structure of the prosthesis by using a topological optimization algorithm based on a generative adversarial network, generating a prosthesis topological structure with gradient material distribution, and obtaining an optimized prosthesis design scheme. By utilizing the embodiment of the invention, a prosthesis design scheme with gradient material distribution can be generated, the weight of the prosthesis is reduced, and the strength and durability of the prosthesis are enhanced.

The invention relates to the technical field of computer-aided skull repair prosthesis design and manufacturing, in particular to a computer-aided skull repair prosthesis design and manufacturing system. Comprising a form prediction unit used for solving an optimal form coefficient and generating an initial prosthesis form; the constraint evaluation unit is used for calculating to obtain a prosthesis conflict index and dividing conflict grades; the correction field generation unit is used for deconstructing a physical violation amount in response to the prosthesis conflict index, and solving and generating a dense displacement field covering all vertexes of the prosthesis through a form correction propagation model; and the closed-loop optimization unit is used for performing geometric deformation on the initial prosthesis form by applying the dense displacement field to obtain a corrected prosthesis form, and re-submitting the corrected prosthesis form to the constraint evaluation unit to execute a grading final edition strategy. According to the method, the contradiction between anatomical fidelity and clinical safety constraint in skull repair is solved by constructing a system comprising morphological prediction, constraint evaluation, correction generation and closed-loop optimization.

The utility model belongs to the technical field of dental prosthesis design, and particularly discloses a hollow base liquid storage type removable denture which comprises a base and artificial teeth arranged on the base, the base is a hollow base with a liquid storage cavity, the hollow base is provided with a plurality of overflow discharge channels communicated with the liquid storage cavity, and the diameter of the outlet end of each overflow discharge channel is 0.3-1mm; a plurality of tissue surface adsorption structures are arranged on the tissue surface part of the base plate. The removable denture disclosed by the utility model can automatically and slowly release artificial saliva, so that the dry feeling of an oral cavity is reduced; due to the design of the tissue surface adsorption structure on the tissue surface, the contact area between the base plate and the oral cavity tissue is increased, so that the adsorption force is improved.

The invention provides an intraosseous total ankle joint prosthesis system, and belongs to the technical field of ankle joint prostheses. Comprising a tibia assembly, a backbone supporting assembly used for enhancing intramedullary stability and arranged at the top of the tibia assembly, a polyethylene liner and a clamping assembly, the polyethylene liner is fixedly connected with the tibia assembly through the clamping assembly, and the talus is chamfered and cut. The chamfering cutting talus is rotationally connected to the bottom of the polyethylene liner, the first fixing assembly and the second fixing assembly are used for improving the stability of the ankle joint prosthesis, and the first fixing assembly comprises a feeding port, a first flow channel, a filler flow channel and a second flow channel which are circularly formed in the tibia assembly at equal intervals. By means of the lightweight prosthesis design, the burden of a patient during walking and standing after an operation is relieved, pain caused by overlarge load is reduced, prosthesis abrasion is reduced, the patient is helped to actively carry out rehabilitation training, the rehabilitation process is accelerated, and the probability of a secondary operation is reduced.

The application discloses a novel personalized prosthesis design method, device, medium and product, relates to the technical field of computer-aided design and medical device prosthesis implant structure design, and the method comprises the following steps: determining target prosthesis rigidity and matrix material rigidity to be designed according to an actual repair site, combining a geometric parameter and rigidity relationship model to determine geometric parameters of a unit cell, and generating a target prosthesis model according to the geometric parameters; wherein, the diamond unit cell structure is used for designing the porous prosthesis, a mathematical model for representing the relationship between the geometric parameters of the unit cell and the overall rigidity of the porous prosthesis is derived based on the Euler-Bernoulli beam theory, and the geometric parameters of the unit cell are determined by using the mathematical model. Apparently, the application can directly and accurately design the structure of the porous prosthesis according to the rigidity requirement of the actual repair site, and effectively improves the design efficiency of the porous prosthesis.

The application belongs to the technical field of medicine and discloses a personalized knee joint unicompartmental prosthesis design method with full flexion path balance. Based on personalized femoral condyle contour and tibial plane information of a patient, a personalized femoral condyle equivalent contour is established, and then a personalized contour unicompartmental prosthesis is designed. The application proposes a new unicompartmental prosthesis design for individual patients, and the purpose is to maintain the height of the postoperative knee joint femoral condyle along the flexion path, so as to maintain the natural balance of the postoperative knee joint soft tissue along the flexion path.

The application discloses a virtual occlusion detection and design method based on intraoral three-dimensional scanning and relates to the field of oral prosthetics. The application comprises the following steps: acquiring complete upper and lower dental arch data and static occlusion data of a patient in a static state; acquiring a dynamic motion trajectory of teeth by using the static occlusion data to correspond to the position of the teeth in a lower jaw motion in real time; combining the complete upper and lower dental arch data in the static state and the lower jaw motion trajectory to complete motion trajectory integration; drawing a boundary along a crown gum margin and an adjacent contact area in the static dental arch data to obtain a single tooth by segmentation; taking a crown cheek side as a common area, registering the segmented single tooth data to occlusion data one by one to obtain occlusion data after tooth-by-tooth registration; and designing a prosthesis based on the dental arch data and the occlusion data after tooth-by-tooth registration. The application can obtain accurate static and dynamic occlusion data and greatly improves the precision and efficiency of prosthesis design and production through automatic virtual occlusion detection and virtual adjustment.

The present invention relates to a method for providing a prosthesis design service, the method comprising: displaying oral data stored in a cloud server; determining a first tooth from the displayed oral data to obtain prosthesis design information; generating a virtual prosthesis design on the basis of a prosthesis design interface; generating machining data for manufacturing the virtual prosthesis design; and controlling an all-in-one dental processing machine to start a prosthesis manufacturing process according to the machining data.

The invention discloses a hip joint cartilage non-uniform multi-section feature three-dimensional reconstruction method, and belongs to the field of medical image three-dimensional digital modeling and orthopedic biomechanical technology research. According to the method, hip joint dysplasia is taken as a research object, and boundary segmentation and reconstruction of a three-dimensional geometric model of bone tissue are carried out through CT (Computed Tomography); based on a nuclear magnetic resonance image and an anatomical structure, computer-aided software and a curve fitting method are utilized to reconstruct a high-precision hip joint cartilage three-dimensional geometric model with inner and outer contours and non-uniform thickness, and finally a hip joint-cartilage three-dimensional model is constructed in an origin registration mode. According to the method, the multi-section feature three-dimensional model of the hip joint cartilage can be accurately and efficiently reconstructed, irregular curved surfaces of the cartilage reconstruction model are effectively reduced, and finite element mesh division and surface contact calculation of the hip joint are facilitated; and a high-precision cartilage three-dimensional digital model reference is provided for clinical diagnosis and treatment, rehabilitation, prosthesis design and biomechanical analysis of hip joint diseases.

The invention discloses a knee joint prosthesis evaluation method and system, and the method comprises the steps: carrying out the multi-modal data collection according to the biomechanical performance test data of a knee joint prosthesis, the medical image data and the postoperative motion capture data of a patient, and carrying out the data fusion through a multi-modal alignment network based on deep learning, a fused multi-modal data set is obtained; inputting the multi-modal data set into an adaptive convolutional neural network, and extracting mechanical characteristics of the knee joint prosthesis under a dynamic load to obtain a dynamic mechanical characteristic matrix; and inputting the dynamic mechanical characteristic matrix into a performance evaluation model based on a multi-scale attention mechanism, performing prosthesis performance quantitative analysis, and generating a performance evaluation report. By utilizing the embodiment of the invention, comprehensive quantitative analysis of the prosthesis performance can be realized, and scientificity and accuracy of prosthesis design are improved.

The present application relates to the technical field of computer-aided skull repair prosthesis design and manufacturing, in particular to a computer-aided skull repair prosthesis design and manufacturing system. The system comprises a shape prediction unit for solving optimal shape coefficients and generating an initial prosthesis shape; a constraint evaluation unit for calculating a prosthesis conflict index and dividing a conflict level; a correction field generation unit for responding to the prosthesis conflict index, decomposing a physical violation amount, and solving a dense displacement field covering all vertices of the prosthesis through a shape correction propagation model; and a closed-loop optimization unit for applying the dense displacement field to geometric deformation of the initial prosthesis shape to obtain a corrected prosthesis shape, and re-submitting the corrected prosthesis shape to the constraint evaluation unit to execute a hierarchical final version strategy. The present application solves the contradiction between anatomical fidelity and clinical safety constraints in skull repair by constructing a system comprising shape prediction, constraint evaluation, correction generation and closed-loop optimization.

A kind of virtual try-on system of dental prosthesis based on three-dimensional scanning, it relates to the field of dental prosthetics;Extract a plurality of facial points and its displacement trajectory information, output the classification result representing the type of facial point, obtain the stability score of facial point in different preset time window, extract the stable interval of jaw position and obtain the jaw position information, and generate the try-on model in combination with the maxillary model, the mandibular model and the prosthesis model, obtain the contact change rate of the try-on model and judge whether it is less than the change threshold, if not, adjust the prosthesis model until it is less than the change threshold;It has the advantages of effectively reducing the interference of soft tissue relaxation on jaw position judgment, improving the accuracy of jaw position information extraction and improving the reliability of prosthesis design.

The invention discloses a dental restoration virtual try-on system based on three-dimensional scanning, and relates to the technical field of dental restoration. Extracting a plurality of face points and displacement track information thereof, outputting a classification result representing the types of the face points, obtaining stability scores of the face points in different preset time windows, extracting a jaw position stable interval, obtaining jaw position information, and generating a try-on model in combination with an upper jaw model, a lower jaw model and a prosthesis model; obtaining a contact change rate of the try-on model and judging whether the contact change rate is smaller than a change threshold, and if not, adjusting the restoration model until the contact change rate is smaller than the change threshold; the method has the advantages that the interference of soft tissue relaxation on jaw position judgment is effectively reduced, the accuracy of jaw position information extraction is improved, and the design reliability of the prosthesis is improved.

The application provides a prosthetic foot toe component with ground environment detection capability and a preparation method thereof, wherein the prosthetic foot toe component comprises: a bottom tactile sensing layer comprising a transparent elastomer containing microparticles, which is used for converting external force into spatial displacement of the microparticles; a shooting module mainly comprising a micro RGB camera and an LED lamp plate, the micro RGB camera is used for capturing the optical flow characteristics of the microparticles when the bottom tactile sensing layer is subjected to force, and converting the optical flow characteristics into an optical flow map, and the LED lamp plate is used for providing a uniform and sufficient illumination environment; an external connector connected to the base and used for connecting external devices; a transparent filling layer used for providing internal mechanical support; and a lightproof packaging layer wrapped outside and used for isolating external light and serving as an interface directly contacting the ground. The prosthetic foot toe component has a unique structure, can realize force sensing and ground environment detection based on the principle of the optical flow method, the preparation method is simple, and the prosthetic foot toe component has important value in the fields of ankle-foot prosthesis design and application.

The application belongs to the technical field of auxiliary medical treatment, and particularly relates to a digital bone augmentation design method and system with real-time visual implant position. The method comprises the following steps: ideal prosthesis design of tooth loss site is performed; CBCT data, intraoral scanning data and ideal prosthesis data are fitted, and the position of the implant is planned; implant guide plate data is imported into MAGICS software, and a virtual implant model is constructed; the virtual implant and the implant guide plate are grouped, and the spatial relative position of the two is locked; the grouped data of the jawbone model, the intraoral scanning data, the virtual implant and the implant guide plate are input into a bone augmentation design software, and the accurate position of the virtual implant in the jawbone is fitted; in the bone augmentation design software, real-time visual virtual bone augmentation painting operation is performed according to the accurate position of the virtual implant in the jawbone, and the bone augmentation design is accurately completed. The design method and system of the application are more convenient and accurate, and have a good application prospect.

The present invention provides a method for designing a porous radial capitellum prosthesis, comprising obtaining a three-dimensional model of the radial capitellum prosthesis; establishing a mainstream cell structure based on the three-dimensional model of the radial capitellum prosthesis to obtain a finite element model of the porous radial capitellum prosthesis; establishing a virtual mechanical test bench in ABAQUS for calculation and comparison to obtain a new cell with the best current mechanical performance; and further modifying the finite element model of the porous radial capitellum prosthesis based on the obtained new cell; establishing a relationship between pore size, porosity, and cell size; and setting node tolerances on the modified finite element model of the porous radial capitellum prosthesis based on the relationship between pore size, porosity, and cell size to generate a porous radial capitellum prosthesis with coincident inner and outer nodes, and then outputting the resultant porous radial capitellum prosthesis after physical processing. Implementation of the present invention can ensure structural strength while increasing pore size and decreasing porosity, effectively reduce the material equivalent elastic modulus, and improve shock absorption performance.

The invention discloses a patellofemoral joint prosthesis preparation method and system, and the method comprises the steps: carrying out the extraction of the anatomical structure of a patellofemoral joint according to the medical image data of a patient, and reconstructing the three-dimensional geometric models of patella and femur; inputting the three-dimensional geometric model into a mechanical simulation platform to obtain a stress distribution diagram of the patellofemoral joint; generating an initial prosthesis model according to the stress distribution diagram and a patient anatomical model, and obtaining a preliminarily optimized prosthesis design scheme in combination with a topological optimization technology and a multi-objective genetic algorithm; and inputting the preliminarily optimized prosthesis design scheme into additive manufacturing equipment to obtain a final patellofemoral joint prosthesis. By utilizing the embodiment of the invention, the design and manufacturing precision of the patellofemoral joint prosthesis can be improved, and the long-term stability and applicability of the patellofemoral joint prosthesis in a biological environment are improved.

The present application belongs to the technical field of prosthesis manufacturing, and aims to provide a knee joint prosthesis design method, system, electronic device and product. The present application firstly constructs an initial prosthesis design model for a specified KBD knee osteoarthritis patient, then obtains knee joint image data of the specified KBD knee osteoarthritis patient, and obtains an image feature set according to the knee joint image data. Subsequently, multiple sets of the image feature set are divided into a training set, a validation set and a test set, and a final prosthesis design model is obtained based on the training set, the validation set and the test set. The final prosthesis design model is used to obtain a knee joint prosthesis structure model matched with the specified KBD knee osteoarthritis patient, and then a knee joint prosthesis matched with the specified KBD knee osteoarthritis patient is manufactured. Thus, the adaptation between the knee joint prosthesis and the skeleton of the specified KBD knee osteoarthritis patient can be improved, and the comfort of the patient after installing the knee joint prosthesis and the service life of the prosthesis can be improved.

The present invention discloses a fully computerized intelligent method and system for producing highly similar prostheses, comprising: a main computer collecting patient information and utilizing a pre-built artificial intelligence model to obtain a 3D model containing segmentation information of each tissue within the patient's missing part, and obtaining a 2D unfolded image of the surface of the 3D model based on the patient information and the 3D model; controlling a 3D printing device to print the 3D model to obtain the various layered parts of the prosthesis body; controlling a film-making device to produce a film on the surface of the missing part; controlling a 2D printing device to print the 2D unfolded image onto the film on the surface of the missing part to form a skin; controlling an assembly device to combine the various parts of the prosthesis, attach the skin to the surface of the prosthesis body, and perform surface treatment to obtain the finished prosthesis. The present invention computerizes and intelligentizes the prosthesis production process, can provide high-precision, highly similar prostheses in a shorter time, and reduces production costs; using artificial intelligence technology for prosthesis design and modeling can improve prosthesis quality and similarity.

The application provides a prosthesis design visualization method, a computing device and a readable storage medium, and the method comprises the following steps: obtaining a target dental arch model; performing cutting processing on the target dental arch model based on a target design model to obtain a pseudo abutment body; calculating the nearest target distance from each first target grid point of the target design model to each second target grid point of the pseudo abutment body, and forming a mapping relationship among the nearest target distance, the corresponding second target grid point and the first target grid point; judging whether the nearest target distance meets one of a plurality of different preset distance range conditions; if the nearest target distance meets one of the preset distance range conditions, determining a to-be-colored area of the target design model according to the corresponding mapping relationship; and assigning a visual identification feature to the to-be-colored area, and the visual identification features corresponding to different preset distance ranges are different. Through the method, a dental technician can intuitively adjust the design of the prosthesis according to the visual identification feature, the evaluation and judgment time is reduced, and the prosthesis design efficiency is improved.

The invention discloses a digital design and manufacturing method and system for a knee joint tibial prosthesis, and the method comprises the steps: collecting the stress distribution and motion trail of a knee joint in different motion states according to the gait analysis data and dynamic mechanical sensor data of a patient, and obtaining a dynamic mechanical feature set of the knee joint; inputting the dynamic mechanical feature set into a geometric design model based on a generative adversarial network, generating an initial tibial prosthesis geometric shape, and obtaining a preliminarily optimized tibial prosthesis geometric model; according to the tibial prosthesis geometric model, designing an internal porous structure of the prosthesis by using a material microstructure optimization algorithm based on deep reinforcement learning to obtain a material and tibial prosthesis design scheme; and inputting the tibial prosthesis design scheme into multi-axis additive manufacturing equipment to obtain a final knee joint tibial prosthesis. By utilizing the embodiment of the invention, the precision and consistency of prosthesis manufacturing can be ensured, and the overall quality of the prosthesis is further improved.

The invention relates to the technical field of medical image processing and personalized medical treatment, and provides a knee joint prosthesis reconstruction method based on a double-domain contrast learning network. According to the method, the problems that the segmentation precision of the complex anatomical structure of the knee joint is low and the adaptability of a prosthesis model is insufficient are solved by combining double-domain contrast learning with image domain and frequency domain characteristics. According to the technical scheme, the method comprises the steps of obtaining and preprocessing knee joint image data, extracting knee joint anatomical features through a double-domain contrast learning network, conducting three-dimensional reconstruction and extracting key geometric features such as cartilage thickness, contact area and skeleton curvature, and finally generating a personalized prosthesis model highly matched with the anatomical structure of a patient in combination with ISTA-Net. The precision of prosthesis design can be remarkably improved, the postoperative recovery effect is optimized, and the method is widely applied to the field of personalized medical treatment and knee joint replacement.

A design method of a Paporosky III-type acetabular defect reconstruction prosthesis comprises the following steps: acquiring pelvic CT images of a defective side and an uninjured side, constructing a three-dimensional pelvic model according to the pelvic CT image of the defective side, and finally adding a bone grafting cage on the surface of a prosthesis model in a second prosthesis optimization model through other eight steps to obtain the Paporosky III-type acetabular defect reconstruction prosthesis. The prosthesis designed by the design method of the Paporosky III type acetabular defect reconstruction prosthesis can reduce tissue irritation and trauma, and has the advantages of upward movement resistance, rotation resistance, high biomechanical strength, initial stability and good long-term stability.

The invention belongs to the technical field of medicine, and discloses a design method of a personalized knee joint unicompartmental prosthesis with a balanced total flexion path. Based on personalized femoral condyle equal-height points and tibia plane information of a patient, a personalized femoral condyle equivalent equal-height circle is established, and then a personalized equal-height single-condyle prosthesis is designed. The invention provides a brand-new unicompartmental prosthesis design for individual patients, and aims to maintain the height of the femoral condyle of the knee joint along the flexion path after operation, so as to maintain the natural balance of the soft tissue of the knee joint along the flexion path after operation.

The application provides an intraosseous total ankle joint prosthesis system, belonging to the technical field of ankle joint prosthesis. The system comprises a tibia component, a diaphysis support component for enhancing intramedullary stability, the diaphysis support component being arranged on the top of the tibia component, a polyethylene liner and a clamping assembly, the polyethylene liner being fixedly connected with the tibia component through the clamping assembly, a chamfered cutting talus, the chamfered cutting talus being rotatably connected to the bottom of the polyethylene liner, a first fixing assembly and a second fixing assembly for improving the stability of the ankle joint prosthesis, the first fixing assembly comprising an inlet opening, a first flow channel, a filler flow channel and a second flow channel which are circularly arranged at equal intervals in the tibia component. The lightweight prosthesis design of the application reduces the burden of patients when walking and standing after operation, reduces the pain caused by excessive weight bearing, and reduces the prosthesis wear, which not only helps the patients to actively carry out rehabilitation training, speeds up the rehabilitation process, and reduces the probability of secondary surgery.