84 results about "Bone model" patented technology

The invention discloses a manufacturing method of a 3D printing guide plate for a cervical vertebra single-door operation, and relates to the technical field of crossing of medical auxiliary instruments and additive manufacturing. Firstly, a cervical vertebra CT data three-dimensional reconstruction skeleton model is obtained, an operation scheme is virtually planned, then a navigation template digital prototype is generated through parameterization, finite element simulation optimization is carried out, and a three-dimensional 3D printing guide plate for the cervical vertebra single-door operation is obtained. Printing with the biocompatible resin by using light curing equipment, and finally treating to obtain a final product. According to the method, a high-precision cervical vertebra skeleton model is generated through CT thin-layer scanning and three-dimensional reconstruction, parameters of a hinge area, a door opening groove line and a nail path are determined through virtual planning, and the problem that damage or positioning deviation is easily caused due to the fact that a traditional operation depends on experience is solved; constructing a navigation template attaching curved surface by a specific algorithm, reserving a soft tissue compensation gap, matching with a hollow window bulge to limit the depth of an abrasion drill, controlling the deformation of a guide plate through finite element simulation and topological optimization, selecting specific resin to ensure the stability, ensuring the suitability by virtue of virtual registration and standardized manufacturing, and improving the accuracy, safety and efficiency of an operation.

A method includes displaying, on a graphical user interface, a planned position of a virtual implant model relative to a virtual bone model of a bone. The virtual implant model includes a plurality of virtual screw holes offset from a central axis of the virtual implant model. The method also includes determining a planned rotational orientation of the virtual implant model by rotating, on the graphical user interface, the virtual implant model about the central axis of the virtual implant model such that the plurality of virtual screw holes rotate about the central axis. The method also includes controlling a robotic device to guide preparation of the bone to receive a physical implant in the planned position. The method also includes providing computer-assisted navigation configured to guide the physical implant into physical rotational alignment with the planned rotational orientation of the virtual implant model.

This invention relates to the field of dental implant tool technology, specifically to a method for analyzing the deviation of dental implant positioning guides based on digital simulation. The method includes: acquiring a scanned model of the guide, an oral STL model, and an alveolar bone model of the patient to be tested; determining the oral contact error factor corresponding to each triangular facet of the guide, and selecting the contact triangular facets; determining the target support strength corresponding to the contact triangular facet based on the distance and directional deviation between the contact triangular facet and the alveolar bone model, and the oral contact error factor corresponding to the contact triangular facet; acquiring the guide hole axis and guide plate fitting error; determining the local support degree of the contact triangular facet in a preset direction; and determining the target guide plate deviation based on the guide plate fitting error and all local support degrees. This invention, by combining the guide plate fitting error and the support status of the guide plate in different areas, relatively objectively quantifies the guide plate deviation, thereby improving the rationality of the guide plate deviation analysis.

The present invention aims to provide a technology that can more easily and accurately determine the posture of bones of characters that virtually represent humans, etc. in a virtual space, or robots, etc. existing in a real space. In a skeletal model in which a parent bone and a child bone are connected by a joint, the posture determination method of the present invention, which determines the posture of a child bone using a plurality of parameters defining the rotation of the child bone relative to the parent bone, comprises the steps of making a judgment on at least one of the plurality of parameters, correcting the plurality of parameters based on the judgment result, and determining the posture of the child bone using the corrected plurality of parameters. The step of making a judgment includes making a first judgment on whether any one of the plurality of parameters exceeds a first limit, wherein the first limit is expressed as a limit in which at least one parameter affects a limit related to two or more other parameters. The step of correcting the plurality of parameters includes, if the first judgment result determines that the first limit has been exceeded, a step of correcting the plurality of parameters using the first limit so that the plurality of parameters are within the range of the first limit.

This invention relates to the field of orthopedic surgical risk assessment, and in particular to a method and system for orthopedic surgical risk assessment. By acquiring preoperative and intraoperative data of a patient's orthopedic surgery, the method preprocesses the preoperative and intraoperative data, extracts the spatial features of bone microstructure from the initial orthopedic surgical data using a cascaded feature extraction network, calculates the correlation weights between imaging data and biological signals through a cross-modal attention mechanism, and constructs a patient-specific bone model based on finite element analysis to simulate the characteristic orthopedic surgical data in real time. The method simulates the distribution of joint contact stress at different osteotomy angles, the impact of micromotion thresholds at the bone implant interface and hemodynamic changes on the bone healing microenvironment after internal fixation device implantation, significantly reducing complications caused by improper operation and improving the surgical success rate.

A system and method for planning and assisting orthopedic surgical procedures includes a computing device and a robotic surgical device. The computing device defines a surgical coordinate system relative to a patient's bone and captures a plurality of point locations within the surgical coordinate system. The plurality of point locations includes a first point location representing a location on a soft tissue surface overlying a portion of the patient's bone. The computing device identifies an estimated soft tissue thickness value for each of the plurality of point locations and registers a three-dimensional model of the patient's bone within the surgical coordinate system based on the plurality of point locations and the estimated soft tissue thickness value. The computer system can control the robotic surgical device according to the registered bone model.

A system for intra-operatively viewing and manipulating computer-aided design (CAD) objects associated with a joint of a patient is disclosed. The system comprises a point probe having a tip and one or more tracking markers, a tracking device having one or more sensors configured to detect a location of the tracking markers, a display screen, and a processor. The processor displays a CAD environment on the display screen including a 3D bone model and one or more 3D objects. The processor receives a selection of one of the CAD objects from the point probe and receives the location of the tracking markers from the tracking device. The processor determines a motion of the tip of the point probe, processes the motion of the tip to generate a vector of motion constrained to a selected movement axis of the reference axes, and repositions the selected CAD object according to the vector.

The application discloses a method for registering a skeleton model to a world coordinate system of a body surface point cloud, which comprises the following steps: S1. scanning a human structure by using a CT scanning device to obtain a CT skeleton three-dimensional model and a CT human structure body surface point cloud; S2. scanning the human structure by using a structured light 3D camera to obtain a 3D structured light body surface point cloud of a 3D structured light human structure; S3. selecting an antegrade registration or a retrograde registration mode to register the body surface and the skeleton of the human structure according to the scanned human structure; the method for registering the skeleton model to the world coordinate system of the body surface point cloud: registering the torso and the pelvic bone of the human body by using the antegrade registration mode; registering the limbs of the human body by using the retrograde registration mode; constructing a virtual puncture channel, so that even if the spatial position of a puncture instrument is adjusted at will in a process of orthopedic puncture, the relative position relationship between the puncture instrument and the human structure can be acquired in real time, and the navigation puncture based on dynamic three-dimensional visualization is realized.

A computer-implemented method to improve the point collection process during registration of a bone for a computer-assisted surgical procedure is provided. Based on bone digitization data, a simulation is performed to confirm the accuracy of the registration for different digitization regions. Results are tested to identify which digitization regions meet a predefined accuracy requirement. The resulting information is used to perform a computer-assisted surgical procedure. A computerized simulation method for registration of a bone for a computer-assisted surgical procedure is also provided based on processor executing random stroking an expected exposed surface of a bone model with multiple of stroke curves to cover most of the bone model surface with uniform noise and a random sample consensus is applied to remove outlying point to yield the best registration results, to find the top subset as to overlap. A method to perform computer-assisted surgery is also provided.

The application relates to the technical field of orthopedic surgery navigation, and discloses a high-position tibial osteotomy navigation method, a system and a storage medium, and a communication method which comprises the following steps: generating a 3D bone model of a lower limb of a patient based on medical images and performing preoperative osteotomy planning; performing visual positioning system detection and spatial calibration of a surgical instrument; installing an optical marker array, collecting actual bone point cloud data, and realizing alignment of the model and the bone through a registration algorithm; in-surgery real-time calculation and display of deviation of an operation track and planning parameters; post-surgery reconstruction of a lower limb force line, and comparison and evaluation with preoperative planning and in-surgery navigation records. The system comprises a hardware execution unit and preoperative planning, calibration verification, in-surgery registration, real-time navigation and post-surgery evaluation modules. The application realizes full-process integration of preoperative accurate planning, in-surgery real-time closed-loop navigation and post-surgery quantitative evaluation, and significantly improves the precision, repeatability and predictability of clinical effects of surgery.

The invention discloses a trigeminal neuralgia percutaneous puncture path planning method and system. The method comprises the following steps: acquiring skull CT (Computed Tomography) image data and MRI (Magnetic Resonance Imaging) image data of a target, and performing three-dimensional reconstruction to obtain an oval foramen bony model and a McLeod cavity three-dimensional model; determining an anatomical entry point, determining a bony channel constraint point based on an oval foramen bony model, and determining an ideal end point of a puncture path based on a McLeod cavity three-dimensional model; taking the anatomical entry point as a path starting point, taking the ideal end point as a path end point target, taking the bony channel constraint point as a path space constraint condition for path passing, and optimizing a target function to obtain an optimal puncture path; based on the McLeod cavity three-dimensional model space volume, determining an individualized balloon injection amount estimation range of a target; and storing the space coordinate and the direction vector of the optimal puncture path and the individualized balloon injection amount estimation range as a standardized digital file. According to the invention, the certainty and safety of the puncture path can be improved.

A system for confirming registration of a bone involved in a joint replacement procedure is provided. The system includes a three-dimensional (3-D) bone model of the bone registered to a bone location, a visible light camera, and a display. The visible light camera captures images of the bone in the camera's field-of-view (FOV). The display is configured to display the captured images of the FOV and an image of the 3-D bone model, where the displayed location of the image of the 3-D bone model corresponds to the location of the 3-D bone model registered to the bone location. The registration may be confirmed if the displayed location of the image of the bone as captured by the visible light camera corresponds to the displayed location of the 3-D bone model.

The application discloses a data processing method and device for a hip joint, a storage medium and an electronic device. It relates to the technical field of artificial intelligence. The method comprises the following steps: acquiring medical image data of a target object hip joint; identifying the fusion type of the hip joint in the medical image data by using a fusion recognition model, to obtain a target fusion type corresponding to the medical image data; performing three-dimensional reconstruction based on the medical image data according to the target fusion type, to obtain a first bone model; and obtaining a target registration point set according to the first bone model, wherein the target registration point set is used to provide guidance for registration in a hip joint surgery. The application solves the problem of low accuracy of registration point selection caused by hip joint fusion in the prior art.

This technology efficiently improves the accuracy of musculoskeletal model simulations that take into account variations in muscle development among individuals. [Solution] The simulation device 1 of a musculoskeletal model including multiple muscle parts arranged along the skeleton includes a measurement result acquisition unit 11 that acquires a first measurement result, which is the measurement result of muscle strength measurement using multiple muscle parts belonging to the subject's SFL, and a second measurement result, which is the measurement result of muscle strength measurement using multiple muscle parts belonging to the subject's SBL, and an adjustment unit 12 that performs an adjustment process to adjust the muscle strength of at least one of the multiple muscle parts belonging to the SFL and the multiple muscle parts belonging to the SBL in the musculoskeletal model based on a comparison result of the first measurement result and the second measurement result.

The invention relates to a method for producing a template for a bone plate for treating a fracture of a bone of a human or animal, in particular for a bone plate for treating a pelvic fracture of a human. According to the invention, in order to produce the template in a patient-specific manner with high practical applicability, a digital data set of an image of bone fragments of the fracture is obtained using an imaging method, in particular an MRI or CT or X-ray method, wherein the method comprises the following steps: a) creating a digital, in particular virtual, three-dimensional bone model of the bone fracture fragments on the basis of the data set; b) determining a digital template design adapted to the bone model; c) producing, in particular 3D printing, the template on the basis of the determined template design. The invention also relates to a data processing device, to a system for producing the template, and to a computer program product.

This application applies to the fields of computer-aided medical technology and surgical robot technology, and provides a knee-preserving surgical robot and its control method. The knee-preserving surgical robot includes: a preoperative planning unit, used to determine the osteotomy plane based on the surgical key points on the patient's three-dimensional bone model, and plan the correction angle after establishing the target force line; an intraoperative execution unit, used to perform osteotomy operation according to the osteotomy plane with the assistance of a navigation system, so that the angle after the osteotomy site is stretched meets the requirements of the correction angle; and a postoperative evaluation unit, used to simulate postoperative bone images, calculate the force line angle based on the simulated postoperative bone images, and adjust the correction angle formed by the actual osteotomy according to the force line angle; tracers are respectively installed on the proximal and distal ends of the patient's bone and the corresponding surgical tools, and the navigation system provides position data for the operations performed by the intraoperative execution unit and the postoperative evaluation unit by tracking the position changes of the tracers.

The present application relates to a kind of whole guide plate for bone graft sandwich bone grafting simultaneous implantation and manufacturing method, including the implantation guide plate of bone graft and implant, bone graft positioning finishing plate, tooth positioning device of bone area, osteotomy guide plate, tooth bone model of edentulous area, tooth bone model of bone area, the top of the implantation guide plate of bone graft and implant is connected with the bottom of bone graft positioning finishing plate, can be set with the several positioning points corresponding to bone area position in bone area by the guide drill needle hole on bone graft positioning finishing plate, can accurately transplant the bone graft taken to bone area;The osteotomy guide plate can be connected with tooth positioning device of bone area, also can be fixed in bone area according to the several positioning points;The present application can realize accurate, minimally invasive, safe to obtain intraoral autologous bone graft, can provide bone graft acquisition, finishing, implantation and implantation whole process guidance for surgeon, reduce the difficulty of operation, assist surgeon to complete the whole operation more accurately, efficiently, safely.

The invention relates to the technical field of orthopedic surgery navigation, and discloses an orthopedic surgery navigation system based on an AR technology, and the method comprises the steps: obtaining skeleton structure data of a patient through MRI scanning, carrying out the segmentation and reconstruction of original data through an image processing algorithm, and extracting a three-dimensional model of a skeleton structure; tracking and positioning the key feature region according to the extracted three-dimensional model of the skeletal structure so as to realize real-time tracking of the skeletal structure of the patient; constructing a virtual operation scene according to the skeleton structure data of the patient, and vividly rendering a skeleton model, an operation tool, a tissue and other elements by using a computer graphics technology; performing sensor calibration on the AR equipment and the surgical workstation, determining the position and direction of the AR equipment in the space by using a preset reference point or a marker, and establishing a mapping relation of a camera-world coordinate system; and performing virtual-real fusion on pre-planned navigation information and the actual skeleton structure of the patient according to the skeleton structure tracked in real time and the reconstructed operation scene, and superposing the navigation information in the visual field of a doctor in a virtual form through AR equipment to guide the doctor to perform an operation.

This invention discloses a method for reconstructing a three-dimensional motion and joint force dynamic model of the jaw system, relating to the field of medical technology. The method includes: S1, acquiring a multimodal dataset synchronously collected through a multimodal sensing system and unified to a skeletal coordinate system based on the mandible and temporomandibular joint; S2, constructing an individualized mandibular musculoskeletal model based on the patient's jaw CT image data; S3, using an optimization algorithm, taking the multimodal dataset as input, and under the constraints of the mandibular musculoskeletal model, performing inverse kinematics solution to deduce the six-degree-of-freedom motion trajectory of the mandible in three-dimensional space; S4, based on the six-degree-of-freedom motion trajectory, applying the optimization algorithm and the mandibular musculoskeletal model, and calculating the dynamic contact reaction force distribution of the temporomandibular joint through inverse dynamics analysis; S5, using the dynamic contact reaction force distribution as input, feeding it back to the mandibular musculoskeletal model to calculate the intensity distribution of key muscles involved in mandibular movement.

A method for generating a custom surgical kit for a surgical procedure and associated surgical kits are disclosed herein. The method includes a step of generating a nonconforming bone model of a patient bone. The method includes a step of generating a model of a custom surgical kit for a surgical procedure using the nonconforming bone model. The model of the custom surgical kit includes a set of three contact elements positioned to contact three points of contact on the nonconforming bone model. The set of three contact elements is each statically positioned relative to each other in the model of the custom surgical kit. The method includes a step of producing the custom surgical kit using the model of the custom surgical kit. Further, the method includes a step of positioning the custom surgical kit on the patient bone using the three points of contact.

A computer-implemented method of preoperatively planning a surgical procedure on a knee of a patient including determining femoral condyle vectors and tibial plateau vectors based on image data of the knee, the femoral condyle vectors and the tibial plateau vectors corresponding to motion vectors of the femoral condyles and the tibial plateau as they move relative to each other. The method may also include modifying a bone model representative of at least one of the femur and the tibia into a modified bone model based on the femoral condyle vectors and the tibial plateau vectors. And the method may further include determining coordinate locations for a resection of the modified bone model.

Embodiments of the present application provide a method for performing tooth root-bone risk assessment and determining a root-bone relationship, a display method, a device, and a medium, used to implement efficient and accurate assessment of a root-bone condition of a patient's teeth. The method comprises: acquiring a first root-bone model of a patient, wherein the first root-bone model comprises a crown model and a root model corresponding to each tooth of the patient, and a jawbone model of the patient; on the basis of the first root-bone model, determining a first root-bone relationship feature vector of each tooth of the patient, wherein the first root-bone relationship feature vector is used to represent a geometric relationship between the jawbone model and the root model corresponding to each tooth in the first root-bone model; on the basis of the first root-bone relationship feature vectors of all the teeth of the patient, assessing a root-bone risk condition of the teeth in the first root-bone model, thereby achieving efficient and accurate root-bone risk assessment of the patient's teeth.

This invention discloses a distributed sensing-based invisible orthodontic monitoring system and method, relating to the field of oral medicine technology. The system includes a data acquisition module, a model construction module, a model update module, a root-bone relationship assessment module, a treatment plan adjustment module, and a brace generation module. It uses embedded flexible thin-film pressure sensors to collect pressure data on the contact surfaces between the braces and teeth in real time. Combined with biomechanical equations, it dynamically updates the tooth, gingiva, and alveolar bone models, assesses the root-bone relationship safety factor in real time, and automatically adjusts the treatment plan based on the deviation between the actual and expected positions. Finally, it uses selective laser sintering to print the next stage of the braces. This invention achieves continuous monitoring of tooth movement, dynamic assessment of root-bone relationships, and closed-loop adjustment of the treatment plan, significantly improving the safety and efficiency of orthodontics.

A method comprising: for each respective training iteration of a plurality of training iterations: applying a generator machine learning (ML) model of a generative adversarial network (GAM) to input data to generate an output bone model for tire respective training iteration: applying a second ML model of the GAN to the output bone model to generate a discriminator output for the respective training iteration, wherein the discriminator output for the respective training iteration comprises a level of confidence that the first ML model generated the output bone model: determining a loss value for the respective training iteration based on the discriminator output tor the respective training iteration; and updating parameters of the first ML model or the second ML model based on the loss value for the respective training iteration.

The invention discloses a method for evaluating centrifugal force of a North European popliteal muscle test based on deep learning, and relates to the technical field of sports biomechanics evaluation, and the method comprises the following steps: S1, data acquisition: a near-infrared motion capture system and four three-dimensional dynamometers synchronously acquire kinematics and dynamics data and time-align the kinematics and dynamics data; s2, simulation and database construction: constructing an individualized muscle-bone model based on OpenSim, obtaining a knee joint torque true value through inverse kinematics and inverse dynamics analysis, and constructing a standardized three-dimensional time series data set; s3, constructing a model, and realizing knee joint moment prediction by adopting a double-layer BiLSTM network fused with biomechanical physical constraints; s4, training optimization: standardizing the preprocessed data and improving the model performance by adopting a specific strategy; and S5, evaluation calculation: verifying the model through RMSE, Rand MAE, and calculating the centrifugal force of the popliteal muscles in combination with the arm-of-force constants. The deep learning time sequence modeling capability and the biomechanical physical constraint are considered, low-cost popularization is realized, the precision is guaranteed, and the method is suitable for various mechanisms such as sports, rehabilitation and fitness.

Stump simulator for medical training purposes, especially for plaster casts or palpation exercises, characterized by an anatomical bone model enclosed by a soft layer of silicone gel or a similar soft material, wherein the external shape and texture of the soft tissue layer corresponds to a real amputation stump of a human extremity.

The invention discloses a man-machine collaborative robot anisotropic admittance control method based on an offline muscle-bone performance model. Aiming at the bottleneck that the existing admittance control neglects the biomechanical heterogeneity of a human body and the inverse dynamics calculation is time-consuming, the invention constructs a control framework of offline model construction-online real-time estimation. The method comprises the following steps: establishing a human body muscle-bone model offline, performing simulation calculation on a muscle-bone force ellipsoid in a full operation space, and training a deep neural network to establish mapping from a joint space to mechanical properties; the real posture of the human body is calculated through online fusion of vision and foot motion data; and calculating the matching degree of the interaction force and the ellipsoid main shaft, and constructing a direction-dependent anisotropic admittance controller. The impedance characteristic of the robot and the human muscle-bone performance space are isomorphic, high stability in the dominant force application direction and high compliance assistance in the vulnerable direction are achieved, and the muscle-bone injury risk of an operator is effectively reduced.

A surgical system includes a tool operable to modify a bone and circuitry programmed to orient a voxel grid relative to a model of the bone based on a planned bone modification and generate, using the voxel grid, a visualization of progress of the tool in executing the planned bone modification based on tracking data indicative of positions of the tool.

This invention discloses an isolator for establishing an animal model of bone nonunion and its preparation method, relating to the field of medical device technology, including the following steps: Step 1: Obtaining a hydrogen-containing silicone oil prepolymer with Si-H bonds in the side chain; Step 2: Obtaining a silicone macromonomer with epoxy groups in the side chain; Step 3: Obtaining an anti-inflammatory functionalized silicone macromonomer; Step 4: Three-dimensionally reconstructing a bone model to create an isolator model at the defect site; Step 5: Adding the anti-inflammatory functionalized silicone macromonomer obtained in Step 3 and an active diluent to a mixing tank, adding a crosslinking agent under mechanical stirring, adding polyether-modified polydimethylsiloxane, stirring for 30 minutes, degassing under 500Pa vacuum for 2 hours, and then allowing it to stand and mature in a dark room; Step 6: Printing the isolator using a multi-cartridge DLP photopolymerization 3D printer. This invention fundamentally reduces interference with the observation of the pathological process of bone nonunion and achieves high-fidelity modeling and construction.

The invention discloses a pose change state presentation method and device, a medium and a program product. Comprises: receiving first power data; the first power data comprises an acting force for a specified part of a virtual object and kinematics data; determining a pose change state of a target part of the virtual object through a first linkage system based on an initial pose of the virtual object and the first power data; the first linkage system comprises a system for joint movement between joints of the virtual object; the first linkage system is associated with a skeleton model of the virtual object and a reverse motion IK algorithm; the target part comprises an associated part associated with the specified part and the specified part; and sequentially presenting the pose change state of the target part through a time-associated image set. According to the scheme, the time cost and the labor cost of animation image design can be reduced, and the fluency and the coherence of pose change in the animation image are improved.