22 results about "Cortical bone" patented technology

This invention pertains to spinal pedicle screws, specifically locking spinal pedicle screws, including perforated pedicle screws and cortical bone screws that work with them. The proximal end of the self-locking master screw is thickened. A through-hole is provided in the thickened section of the pedicle screw, and the cortical bone screw is driven into the through-hole and fixed to the upper and lower cortical bone layers of the pedicle to form a triangular fixation. After the pedicle screw is implanted, both ends of the through-hole of the pedicle screw are located inside the pedicle. A hole is drilled from the posterolateral aspect of the pedicle using a special aiming device, passing forward and upward through the oblique hole of the pedicle screw, and then through the anterior and superior cortical bone of the pedicle. After measuring the length, a suitable cortical bone screw is selected, screwed in, and locked, fixing the posterolateral cortical bone, the pedicle screw, and the anterior and superior cortical bone of the pedicle. The screw is positioned in a safe area of ​​the superior cortical bone of the pedicle. The cortical bone screw is fixed to the upper and lower cortical bone of the pedicle by passing through the oblique hole, thus locking the position of the pedicle screw.

The utility model discloses a three -sided formula bone knife structure, include: connecting seat, joint, the joint fixed setting in the upper end of connecting seat, handle, the lower extreme of handle with the upper end of joint is detachably connected, three -sided formula cutter body, three -sided formula cutter body setting in the lower end of connecting seat. Through the application of the utility model, provide a three -sided formula bone knife structure for taking bone, especially applicable to the acquisition operation of double cortex ilium, it can be realized in one insertion process smoothly intercepts double cortex bone piece, shortens the operation time and reduces the trauma to the patient, can carry out multidirectional cutting in the narrow bone surface area through three -sided formula design, reduces the demand of repeatedly changing sword or using other turning cutter, further improves the operation efficiency.

The present invention relates to a system and a method for bone fracture risk assessment and provides for a system to predict Osteoporosis and Osteopenia and its associated fracture risk automatically from conventional chest X-ray image. The invention provides an automated digital X-ray bilateral Clavicle Radiogrammetry and its estimation of Cortical Thickness and Calculation of Cortical bone mass indices of Clavicle to predict dual Hips (Neck) Bone Mineral Density (BMD), dual Hips (Total) Bone Mineral Density (BMD) and Spine (Total) Bone Mineral Density (BMD) as measured by dual energy X-ray absorptiometry (DXA) bone densitometer and 10-year probability of both Major Bones (hip, spine, humerus or forearm)—and Hip-Osteoporotic Fracture Risk Scores. Using the same chest X-ray, an automated prediction of Osteoporosis and Osteopenia at both dual hips and spine regions and 10-year probability of both Major Bones and Hip Osteoporotic Fracture Risk using Artificial Intelligence (AI).

System for evaluating the fit of a femoral implant (118A, 188B) to a distal end of a femur (32) in a selected orientation before the femur (32) is resected, the system comprising the following elements: - Means of obtaining predefined form factor information for a variety of femoral implants (118A, 188B); - Means of obtaining information about the shape of the surface of the distal end of the femur (32); - Means for automatically performing a virtual fit assessment of each possible incremental position of a predefined set of incremental positions for each size of an implant to be considered (118A, 188B) before the femur (32) is resected; and - Means for selecting an optimal size and position of an implant (118A, 188B) from the virtual fit assessments, characterized in that the means for selection - Means for calculating a maximum lateral runout of an anterior resection of the femur (32) from an outline (220) of a proximal end of the femoral implant, and / or - Means to calculate a percentage of the outline (220) of the proximal end lying on sectioned anterior cortical bone, and / or - Means of calculating a percentage of the outline (220) of the proximal end that lies on or above uncut anterior cortical bone, and / or - Contains means for calculating a maximum gap between the femoral implant and the uncut anterior cortical bone.

This application discloses a method, display method, apparatus, device, and storage medium for determining jawbone features. The method includes: obtaining a radicular bone scan image; segmenting the jawbone based on the radicular bone scan image to determine a segmented jawbone image; using a neural network, taking both the radicular bone scan image and the segmented jawbone image representing the same jawbone location as input, to determine a jawbone feature image and a cancellous bone feature image; comparing the jawbone feature image and the cancellous bone feature image, and determining a cortical bone feature image based on the differences; and determining and outputting cortical bone feature information based on the cortical bone feature image. The method provided in this application can improve the accuracy and efficiency of jawbone feature determination.

The application discloses a kind of biomimetic composite scaffold with periosteum-cortical bone-cancellous bone structure and its preparation method and application.The scaffold is assembled by independent periosteum biomimetic scaffold module and independent bone trunk biomimetic module.The periosteum biomimetic scaffold module is cylindrical tube structure hydrogel, loaded with zinc silicate particles and periosteum related cells, with the biological functions of promoting cartilage differentiation, secreting nerve and vascular factors and synthesizing periosteum matrix proteins.The bone trunk biomimetic scaffold module is cylindrical bioceramic, with multiple vertical pipes embedded in the dense layer of outer wall to simulate cortical bone, and with staggered structure inside to simulate cancellous bone.Animal experiments show that the biomimetic composite scaffold can effectively promote the integrated regeneration of bone trunk and periosteum in rabbit radial critical size defect model.Therefore, the application provides a new solution for the biomimetic design and regeneration repair of bone tissue engineering.

The application provides a bone layer identification method in hard bone tissue surgery, establishes a finite element simulation model of hard bone tissue surgery operation, carries out geometric modeling on the hard bone tissue, discretizes the hard bone tissue into finite element grids, defines material properties of the hard bone tissue, introduces constraint conditions of the operation process into the finite element model, obtains corresponding interactive force changes according to different parameters, collects real-time interactive force signals of the surgery tool and the hard bone tissue, selects multiple different types of bone layer features for the interactive force signals, then obtains force interaction curves through the finite element simulation model, establishes a Gaussian mixture model to describe distribution conditions of the different bone layer features, and trains the network model so that the network model can accurately identify different bone layers. The application solves the identification of the cortical bone and the cancellous bone in the hard bone tissue surgery process.

A prosthetic system (100) comprises a support structure (120) for use in implanting a component of an implant in the first bone of the subject. The support structure (e.g., a cone) has a first end surface (122), a second end surface (124), an exterior surface (126) extending from the first end surface to the second end surface, and an inner surface (128) defining a passageway extending from the first end surface to the second end surface. The exterior surface of the support structure is configured to be received in a cavity of the first bone such that the first end surface is flush with or beneath a surface of the first bone, and the exterior surface of the support structure is configured to be received in the cavity of the first bone such that a section of the exterior surface of the support structure contacts cortical bone (138) in the diaphyseal zone of the first bone.

This application discloses an automatic analysis method for CT images of long bones in mice and rats, relating to the field of image processing technology. The method includes: acquiring a CT image sequence of the target long bone, extracting the three-dimensional spatial distribution of bone tissue, and performing pose alignment and three-dimensional cropping to obtain a standardized bone image sequence; then constructing candidate depth intervals based on butterfly-shaped anatomical features and key points of growth plate strip-shaped gaps, respectively, and obtaining a fine search range through intersection operation; subsequently identifying candidate slices of triangular fractures and determining the anatomical zero point; finally, mapping the target analysis region based on the anatomical zero point, completing cortical bone segmentation, medullary cavity segmentation, and trabecular bone extraction under closed mask constraints, and outputting quantitative parameters of bone tissue. This application achieves accurate positioning of the growth plate and unified analysis region mapping in long bone CT images, improving the accuracy of trabecular bone extraction and the consistency of bone tissue quantification results.

This utility model discloses a bone aspiration sampling needle, belonging to the field of medical devices. One end of the outer needle body is serrated, and an axial sample receiving cavity is provided inside the outer needle. One end of the inner needle body is equipped with a drill bit. The inner needle body is detachably fitted into the sample receiving cavity, with the drill bit extending out of the serrated end of the sample receiving cavity. The outer wall of the inner needle body fits against the inner wall of the serrations. After the drill bit penetrates the cortical bone of the lesion, the inner needle is withdrawn, and only the outer needle advances. During the advancement of the outer needle, the serrations cut the bone marrow, and the cut bone marrow enters the sample receiving cavity. The outer needle is withdrawn, and the bone marrow sample is extracted, preserving the original appearance and structure of the bone marrow sample. A drainage connector is also provided. The outer needle is connected to a flushing device through the drainage connector, allowing for the injection of medication to treat and flush the bone lesion, or for the extraction of diseased bone marrow and waste fluid through a drainage device. The sample receiving cavity can also be cleaned through the drainage connector.

The present application relates to the technical field of orthopedic medical devices, and particularly relates to a distal femoral fracture medial column support anti-rotation intramedullary nail system, which comprises a main nail configured to be implanted into the femoral medullary cavity from the medial condyle of the femur, extends along its axial direction and has a tail part and a head part; the tail part is provided with an anchoring part for anchoring in the cancellous bone inside the medial condyle of the femur, and the head part is provided with at least one first locking hole; a tension nail configured to be transversely implanted from the medial condyle of the femur to the lateral condyle of the femur and to pass through the tail part of the main nail, for connecting the medial condyle of the femur with the lateral condyle of the femur; and a locking nail configured to pass through the first locking hole of the head part of the main nail, for anchoring the head part of the main nail in the boundary area of the cortical bone and cancellous bone of the lateral condyle of the femur. The intramedullary nail system provides reliable medial column axial support and anti-rotation stability for the distal femoral fracture through minimally invasive implantation from the medial condyle of the femur.

The application discloses a 3D printing bone implant with different cell assembly porous mechanical adaptation structures and a preparation method thereof, and belongs to the technical field of orthopedic implants. The bone implant comprises a nail rod main body and a mechanical adaptation porous part, the porous part is divided into a cortical bone area, a 1-5mm transition area and a cancellous bone area along an axial direction, the transition area is evenly divided at opposite angles and is assembled by using different cell gradients, the porosity linearly changes, and smooth connection is realized between the cells by sharing nodes or struts; the bone implant is integrally formed by metal 3D printing, and a biological active coating can be selected to be coated on the surface. The application breaks through the design limitation of a single cell, realizes precise matching of the elastic modulus of the bone implant and the natural bone cortical bone-cancellous bone gradient, improves the mechanical inadaptation problem of the existing porous bone implant, improves the implant stability, is especially suitable for osteoporosis patients, and solves the related core problems in the prior art.

The present application relates to a kind of knee joint prosthesis and its manufacturing method, wherein the knee joint prosthesis includes tibial platform prosthesis, tibial platform prosthesis has osteotomy fitting area;Osteotomy fitting area includes integration area, anchoring area and transition zone;Integration area is positionally corresponding with host cancellous bone area, for inducing bone tissue growth to realize long-term biological fixation;Anchoring area is positionally corresponding with host sclerotic bone area or cortical bone area, realizes immediate fixation by mechanical interlocking;Transition zone is located between integration area and anchoring area, and the porosity of transition zone gradually decreases along the direction of integration area to anchoring area, and structural rigidity gradually increases along the direction of integration area to anchoring area, its beneficial effect is, the active adaptation of prosthesis and host bone bed non-uniform biological characteristics is realized, immediate mechanical stability and long-term biological integration effect are obtained under the premise of not needing permanent screw auxiliary fixation, the risk of prosthesis loosening is reduced, and the clinical service life of prosthesis is effectively prolonged.

The application discloses a femur cortical bone parameter quantitative analysis method and system based on a three-dimensional medical image, relates to the technical field of medical image processing and medical image intelligent analysis, and comprises the following steps: acquiring an initial femur three-dimensional medical image and performing pretreatment; segmenting the pretreated femur three-dimensional medical image to generate a bone tissue mask of a femur region and separate a cortical bone three-dimensional mask; generating a three-dimensional thickness distribution map of the femur cortical bone; extracting a global depth feature vector and a local statistical feature vector representing a three-dimensional space distribution mode of the cortical bone in the three-dimensional thickness distribution map, and combining the feature vectors to splice a comprehensive feature vector; and performing quantitative analysis on the comprehensive feature vector to generate a quantitative analysis result for representing a femur cortical bone thickness parameter space distribution mode. The application can automatically, accurately and comprehensively analyze the cortical bone thickness features in the femur three-dimensional CT image, and better realizes parameterization and quantization of the femur cortical bone thickness features.

This invention relates to the field of bone repair scaffold technology, specifically to a multi-level sustained-release biomimetic bone repair scaffold based on mussel adhesive protein and its preparation method. This invention organically integrates the strong wet adhesion of recombinant mussel adhesive protein, the excellent mechanical properties of biomimetic mineralized collagen, the programmed drug release capability of drug-loaded PLGA-PEG biphase sustained-release microspheres, and the 4D shape memory characteristics of thermosensitive poly(N-isopropylacrylamide) hydrogel to achieve multi-functional synergy. Then, low-temperature deposition 3D printing combined with thermosensitive materials is used to achieve 4D printing of the scaffold, resulting in a scaffold with a complex external morphology and a precise internal porous structure. The mechanical strength reaches the level of cortical bone, and it can actively adapt to the defect morphology after implantation, reducing intraoperative trimming time by more than 50%.

The present application discloses a root-bone feature determination method, a display method, an apparatus, a device, and a storage medium. The method comprises: obtaining a root-bone scan image; on the basis of the root-bone scan image, performing jawbone segmentation to determine a jawbone segmentation image; determining cortical bone feature information on the basis of the jawbone segmentation image; inputting the root-bone scan image into a localization model to obtain first localization information of N teeth, the first localization information being used for determining position information of the teeth in the root-bone scan image; identifying center information of different teeth in the root-bone scan image to obtain second localization information of M teeth, wherein N and M are positive integers greater than 1; obtaining a tooth segmentation result on the basis of the first localization information of the N teeth and the second localization information of the M teeth; and determining root-bone feature information on the basis of the cortical bone feature information and the tooth segmentation result. The method provided in the present application can improve the accuracy of root-bone feature determination.

This invention discloses a CAD / CAM lingual alveolar bone augmentation combined with cortical bone incision guide, comprising a maxillary guide for assisting maxillary orthodontics and a mandibular guide for assisting mandibular orthodontics. The maxillary guide includes an upper guide positioning part and an upper guide body. The upper guide positioning part is integrally set on the anterior side of the upper guide body and is fitted and fastened to the maxillary teeth, so that the upper guide body is fitted against the palatal part of the maxilla. The mandibular guide includes a lower guide body, a lower guide positioning part, and a guide lingual guard. The lower guide positioning part is integrally set on the anterior side of the lower guide body and the guide lingual guard is integrally set on the posterior side. The manufacturing method includes: step one, obtaining a digital three-dimensional model; step two, digital guide design. This invention ensures the accuracy of the bone graft range and the adequacy of the bone graft volume during surgery, fills the gap in lingual surgical techniques, and promotes the widespread application and standardization of lingual bone augmentation combined with cortical bone incision.