163 results about "Bone model" patented technology

A system for computer assisted navigation during surgery includes a computer platform that operates to register a target surgical area of a patient. In certain cases, a process includes: obtaining a pre-op CT image of a pelvic region of a patient and intra-operatively obtaining a point cloud data about the pelvic region with a navigated instrument, generating a 3D bone model which excludes non-targeted area such as a femur, and then merging the 3D bone model to the point cloud to register the target surgical area.

A system for computer assisted navigation during surgery includes a computer platform that operates to register a target surgical area of a patient. In certain cases, a process includes: obtaining a pre-op CT image of a pelvic region of a patient and intra-operatively obtaining a point cloud data about the pelvic region with a navigated instrument, generating a 3D bone model which excludes non-targeted area such as a femur, and then merging the 3D bone model to the point cloud to register the target surgical area.

A system for computer assisted navigation during surgery includes a computer platform that operates to register a target surgical area of a patient. In certain cases, a process includes: obtaining a pre-op CT image of a pelvic region of a patient and intra-operatively obtaining a point cloud data about the pelvic region with a navigated instrument, generating a 3D bone model which excludes non-targeted area such as a femur, and then merging the 3D bone model to the point cloud to register the target surgical area.

The invention provides a physical training posture correction method based on machine vision, which comprises the following steps: acquiring an athlete training image sequence through a multi-view image acquisition system and preprocessing the athlete training image sequence, extracting three-dimensional posture key points of a human body by utilizing a depth posture recognition model, constructing a skeleton model and calculating real-time kinematics characteristic parameters, and performing multi-dimensional comparison with standard parameters to generate a posture deviation evaluation report, thereby generating a personalized multi-modal correction feedback scheme, and establishing a personal athlete movement feature database to realize adaptive standard parameter optimization. According to the method, the training postures of athletes can be accurately recognized and corrected in real time, the training effect can be improved, sports injuries can be prevented, and training individuation and scientificity are improved.

A system for computer assisted navigation during surgery includes a computer platform that operates to register a target surgical area of a patient. In certain cases, a process includes: obtaining a pre-op CT image of a pelvic region of a patient and intra-operatively obtaining a point cloud data about the pelvic region with a navigated instrument, generating a 3D bone model which excludes non-targeted area such as a femur, and then merging the 3D bone model to the point cloud to register the target surgical area.

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.

Methods, devices and systems for planning, monitoring, simulating and / or evaluating a knee surgery procedure. Imaging data of the lower limb is acquired. Interpretable 3D models are generated and combined with static and dynamic parameters into an enhanced bone model. Intervention strategy is simulated. Deviations from the intervention strategy are monitored during surgery. Clinical outcome is predicted from machine learning. Methods for calibrating knee surgery imaging data, establishing an alignment reference frame, and simulating an intervention strategy in a knee surgery procedure.

The invention discloses an isolator for establishing a bone nonunion animal model and a preparation method of the isolator, and relates to the technical field of medical instruments, and the preparation method comprises the following steps: step 1, obtaining a hydrogen-containing silicone oil prepolymer with a side chain containing Si-H bonds; 2, obtaining a silica gel macromonomer with an epoxy group on a side chain; step 3, obtaining an anti-inflammatory functionalized silica gel macromonomer; 4, reconstructing the skeleton model in a three-dimensional manner, and creating a defect isolator model; 5, adding the anti-inflammatory functionalized silica gel macromonomer obtained in the step 3 and a reactive diluent into a mixing tank, adding a cross-linking agent and polyether modified polydimethylsiloxane under mechanical stirring, stirring for 30 minutes, defoaming for 2 hours under 500Pa vacuum, and standing and curing in a darkroom after defoaming; and 6, a multi-material-box DLP photocuring 3D printer is adopted for isolator printing. According to the method, observation interference on the bone nonunion pathological process is fundamentally reduced, and high-fidelity modeling construction is achieved.

The invention provides a method for designing an osteotomy surface of an osteotomy guide plate, which belongs to the field of medical instruments and comprises the following steps of: establishing an xoz coordinate system in a sagittal view image on a three-dimensional bone model, and establishing a yoz coordinate system in a coronal view image on the three-dimensional bone model; in the three-dimensional coordinate system, on the basis that the highest point of the normal tibia part is a point P1, the osteotomy surface S1 passes through the point P1 and is parallel to the xoy surface, the spatial position of the osteotomy surface S1 in the three-dimensional coordinate system is obtained; an osteotomy line L1 is determined in a sagittal image, an osteotomy line L2 is determined in a coronal image, and the spatial position of an osteotomy surface S2 in a three-dimensional coordinate system is obtained based on the osteotomy line L1 and the osteotomy line L2; the first osteotomy surface and the second osteotomy surface of the osteotomy guide plate are set according to the 3D printing technology in combination with the relative position relation of the osteotomy surface S1 and the osteotomy surface S2, the osteotomy guide plate is obtained, the osteotomy guide plate is designed according to the osteotomy plane equation, and operation errors are reduced.

Methods, systems, and devices for treating osteochondral defects (OCDs) are disclosed. The disclosed methods and systems include collecting joint surface data using image-free methods, generating a three-dimensional (3D) healthy bone model based on the joint surface data and a database of healthy bone anatomies, defining the OCD boundary on the joint, generating a 3D implant model based on the 3D healthy bone model and the OCD boundary, manufacturing an implant based on the 3D implant model, generating an implantation plan, the resected cavity on the joint. The implant includes a 3D-printed titanium alloy substrate having a first and second porous layer separated by a nonporous layer. A polymer material is over-molded onto the second porous layer and treated to exhibit properties that mimic cartilage, while the first porous layer allows the implant to fuse to patient bone.

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.

The application relates to the technical field of medical instrument processing, in particular to a grinding simulation method, which comprises the following steps: generating a three-dimensional bone model and a three-dimensional grinding instrument model; based on action information of the grinding instrument fed back by a sensor, updating the coordinate position change of the three-dimensional grinding instrument model in a virtual scene in real time; based on the position information of the three-dimensional grinding instrument model obtained after the updating and the data point information of the three-dimensional bone model, obtaining the position relationship between the three-dimensional grinding instrument model and each data point; based on the position relationship between the three-dimensional grinding instrument model and each data point, correcting the target position of each data point; based on the different states of the data points, correcting the state of each triangular facet of the three-dimensional bone model; processing all the data points, filling the triangular facets, and obtaining the updated three-dimensional bone model. The method provided by the application improves the updating efficiency of the grinding simulation and guarantees the real-time performance of the grinding simulation.

Disclosed are a method for creating a surgical training model, a surgical training model apparatus, a bone model, an article that emulates tissue of an animal musculoskeletal system, an article that emulates animal fat tissue, and an article that emulates animal skin tissue. One version of the method comprises placing a spinal vertebrae model in a cavity model that emulates an animal body cavity; forming a first layer on top of the vertebrae model, wherein the first layer emulates an animal muscle tissue; placing a second layer over the first layer, wherein the second layer emulates an animal fat tissue; and placing a third layer over the second layer, wherein the third layer emulates an animal skin tissue. The spinal vertebrae model can be 3D printed from a thermoplastic polymer and infiltrated with a foam into an interior space of the 3D printed spinal vertebrae model.

A design method of an anatomical plate for treating a tibial plateau fracture and an internal fixation device are provided. The design method includes: obtaining a high-precision three-dimensional model of a fractured bone of a patient; obtaining a post-reduction bone model; extracting point arrays of a cross section and a sagittal plane and obtaining solid body designs of a lateral plate body and a medial plate body; and adjusting thicknesses of proximal ends of the lateral plate body and the medial plate body, adjusting thicknesses of main bodies of the lateral plate body and the medial plate body, cutting the lateral plate body and the medial plate body from a sagittal plane according to a fit condition of the lateral plate body and the medial plate body, and determining a position and a direction of a screw hole to obtain a lateral anatomical plate and a medial anatomical plate.

A method includes providing a bone model and a surgical plan defining a planned implant pose to the bone model, providing, based on the planned implant pose, a planned resection volume and a cut-away object, generating a visualization for surgical navigation by, subtracting, from the bone model, a region of intersection between the bone model and the cut-away object and including a visualization of the planned resection volume, and dynamically updating the visualization of the planned resection volume to show progress in completing a resection by tracking movement of a surgical instrument completing the resection.

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.

The utility model relates to the technical field of molds, in particular to a mold for injection molding and rubber coating of a hand inner bone model. The die comprises a lower die body and an upper die body, four positioning rods are fixedly connected to the surface of the lower die body, four positioning holes are formed in the surface of the upper die body, the positioning rods are connected with the inner surfaces of the positioning holes of the upper die body in a sliding mode, a protection device is arranged on the surface of the upper die body and comprises four U-shaped frames, and the U-shaped frames are connected with the positioning holes of the upper die body in a sliding mode. The four U-shaped frames are fixedly connected with the surface of the upper mold, and long rods are slidably connected to the inner surfaces of the U-shaped frames. The problems that when a worker makes a hand inner bone, due to the fact that an upper mold positioning hole reciprocates on an arc face of a positioning rod, the arc face of the positioning rod is abraded due to long-term movement, the positioning precision of an upper mold is affected, and the positioning precision of the upper mold is affected are solved. And the quality is reduced due to errors in the production process of the internal bones of the hands.

The invention relates to the technical field of tooth implantation tools, in particular to a tooth implantation positioning guide plate deviation analysis method based on digital simulation, and the method comprises the following steps: obtaining a guide plate scanning model, an oral cavity STL model and an alveolar bone model of a patient to be detected; determining an oral cavity contact error factor corresponding to each guide plate triangular patch, and screening out a contact triangular patch; according to the distance and direction deviation condition between the contact triangular patch and the alveolar bone model and the oral cavity contact error factor corresponding to the contact triangular patch, determining target supporting strength corresponding to the contact triangular patch; acquiring a guide hole axis and a guide plate fitting error; the local supporting degree of the contact triangular patch in the preset direction is determined; and determining the target guide plate deviation according to the guide plate fitting error and all local support degrees. The guide plate deviation is quantified relatively objectively by combining the guide plate fitting error and the supporting conditions of the guide plate in different areas, so that the reasonability of guide plate deviation analysis is improved.

The application is suitable for the technical field of image processing, and provides a bone data calibration method and device, electronic equipment and storage medium, comprising: acquiring a three-dimensional bone model of a target object; in response to an editing operation on the three-dimensional bone model, determining target data corresponding to the editing operation in the three-dimensional bone model; if the target data meets a preset abnormal calibration condition, determining a calibration strategy corresponding to the three-dimensional bone model according to an abnormal type corresponding to the target data; and generating a calibration result of the target object based on the editing operation and the calibration strategy. The above method can adjust a plurality of three-dimensional data corresponding to an abnormal type in batches according to the corresponding abnormal type, so as to update the three-dimensional bone model, reduce the difficulty of adjusting the three-dimensional bone model, and improve the calibration efficiency.

The embodiment of the invention provides a glenoid fossa prosthesis, a glenoid fossa prosthesis model generation method, a glenoid fossa prosthesis model generation device, computing equipment and a computer program product. The method comprises the following steps: acquiring mandibular movement data and skeleton image data of a test object; establishing a skeleton model of the test object according to the skeleton image data; carrying out motion loading on the skeleton model according to the mandibular motion data; performing motion simulation based on the skeleton model after motion loading to generate a mandibular motion envelope surface; determining parameters of a glenoid fossa prosthesis model according to the mandibular movement envelope surface, and generating the glenoid fossa prosthesis model, namely, constructing a kinematics model based on temporal-mandibular joint movement data of a normal person with extrawings attached, and determining the mandibular movement envelope surface based on a condylar process vertex; according to the articular fossa prosthesis model of the artificial temporomandibular joint prosthesis with the extrawing muscle attachment, the technical problem that the articular fossa prosthesis cannot adapt to the physiological movement range of the artificial mandibular branch prosthesis in the related technology is solved.

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.

To provide an orthopedic technique training device with a novel structure, capable of training techniques in endoscopic orthopedic surgical procedures in an environment closer to an actual surgical condition.SOLUTION: An orthopedic technique training device 10 comprises: a water tank 14 in which a skeletal model 12 is fixed and which contains a transparent liquid 16 that surrounds the skeletal model 12; and an endoscope 15 whose tip portion is inserted into the water tank 14, and which has at the tip portion at least one of a suction port 144 for suctioning the transparent liquid 16 from the water tank 14 and a discharge port 146 for discharging the transparent liquid 16 into the water tank 14.SELECTED DRAWING: Figure 1

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.