388 results about "Ligament" patented technology

The invention provides an intelligent wearable rehabilitation monitoring and evaluation device after anterior cruciate ligament injury, and relates to the technical field of exercise rehabilitation and intelligent medical monitoring, the device comprises a sensor acquisition module, a signal processing module, a compensation determination module, a difference determination module and an evaluation analysis module, a force-electricity coupling flexible sensor, an IMU and a pressure sensor, the method comprises the following steps: synchronously collecting a muscle force signal, a surface electromyogram signal, an attitude signal and a plantar pressure signal at the same position, performing dynamic filtering, confidence enhancement and personalized compensation processing, extracting a difference feature vector, inputting the difference feature vector into a muscle force prediction model, and outputting a quantitative evaluation result. The portable wearable long-term dynamic monitoring is realized, the core indexes of muscles, joints and gaits are covered in multiple dimensions, the assessment is accurate and real-time, the rehabilitation scheme can be optimized, the risk of re-injury is reduced, and the rehabilitation effect and compliance of a patient are improved.

Orthopedic implants and related surgical methods for using same. The implants have suture bore geometries that facilitate performance of the surgical methods, thereby providing for improved optimal biomechanical force application in various anatomies. The implants include suture bores that have an angled / diagonal, or skewed, orientation within the anatomical planes (lateral / sagittal and frontal / coronal). The suture bores have the skewed orientation so that the adjacent soft tissues (i.e., tendons or ligaments) can be advanced via the suture therethrough in superior-inferior and inferior-superior directions. Openings, or holes, at the ends of the suture bores are configured to approximate the adjacent associated soft tissue to the implant.

This disclosure relates to surgical fixation systems and methods. The surgical fixation systems of this disclosure may include various combinations of fixation devices, soft suture constructs, and / or adjustable loops and are configured for use in various knotless surgical methods, including but not limited to, syndesmosis, AC joint, UCL, bunion, anterior cruciate ligament (ACL), and posterior cruciate ligament (PCL) surgical methods.

A weft yarn for an artificial ligament (1), a weft yarn preparation method, and an artificial ligament (1). The artificial ligament (1) is of a round rod structure; a first woven part (102), an in-joint free filament part (103), and a second woven part (104) which are sequentially connected are formed in the round rod structure in the axial direction thereof; the in-joint free filament part (103) comprises a plurality of weft yarns (201), and the weft yarns (201) extend in the axial direction of the round rod structure; and each weft yarn (201) has a fineness of 1000 D-3000 D / 1-100 F, and a mechanical strength of 75-300 N. By increasing the mechanical strength of a single yarn formed in the in-joint free filament part (103) of the artificial ligament (1), the number of yarns in the in-joint free filament part (103) is decreased. The present invention can eliminate a knee joint synovial membrane inflammatory response caused by chippings of the artificial ligament (1) in the reconstruction process of the artificial ligament (1), reduce the degree of contact adhesion between the in-joint free filament part (103) and the tissue, reduce the probability of adhesion, and solve the clinical problems of the inflammatory response and the prolonged surgery time which are caused by difficult removal due to adhesion of the free filaments and the tissue in the revision surgery.

The invention discloses a bionic wrist joint based on rope driving, and belongs to the technical field of bionic robots. The joint mainly comprises a movable part, a driving part and a tendon-imitating rope group. The movable part is composed of a far-end column carpal bone imitating component, a near-end column carpal bone imitating component and a forearm bone imitating component, two two-rod four-cable tensegrity units are formed through ligament imitating elastic bodies to be connected, and a carpal groove imitating dislocation preventing structure is formed at the connecting position of the components. The driving part comprises a driving wheel set driven by a motor. The two tendon-imitating ropes are guided by the pulleys and the tendon-imitating sheath eyebolts, penetrate through the gaps of the components and then are fixed to the far end of the movable part. The degree of freedom is effectively restrained through the carpal-groove-imitating dislocation-preventing structure, dislocation is prevented, the stability is improved, and the double-degree-of-freedom bionic movement of 180-degree buckling / stretching and 90-degree adduction / abduction is achieved in combination with rope driving. The device has the advantages of being simple in structure, high in self-recovery performance and the like, and is suitable for robot operation scenes needing high flexibility and environment adaptability.

The invention relates to the technical field of medical instruments, in particular to an artificial ligament braided fabric. The artificial ligament braided fabric comprises a braided part, the braided part is formed by interweaving warp yarns and weft yarns, a mesh staggered structure is formed, the warp yarns extend in the width direction of the braided part, and the weft yarns extend in the length direction of the braided part. Compared with the prior art, by optimizing the weaving structure and the size design, the complex movement requirements of various joint parts such as the ankle joint and the acromioclavicular joint can be met, the stable fixing effect is provided, and the risks of loosening and shifting of the graft are reduced.

Systems and methods for preparing a ligament graft for a ligament reconstruction procedure are provided. In general, the described techniques utilize a graft holder construct having a graft preparation holder and a suture assembly removably coupled thereto. The graft preparation holder includes an elongate support rail having a longitudinal axis, and a plurality of leaf segments positioned along the longitudinal axis in a spaced relationship and extending laterally from the support rail. The leaf segments can bend to a graft holding configuration so as to define a graft receiving channel configured to receive a graft therethrough. The holder also has at least one support structure configured to mate with the leaf segments to provide stability and rigidity to the segments. The suture assembly has at least one suture tail that can be pulled to affix the suture assembly to a graft without penetrating the graft.

The invention discloses a spiral reinforced composite structure artificial ligament with a bundle characteristic and a preparation method thereof, and belongs to the technical field of biomedical materials. The artificial ligament is of a composite structure, is composed of a plurality of units and has a bundle-shaped characteristic. When the artificial ligament is stretched in the axial direction, the negative Poisson's ratio effect is achieved in the direction perpendicular to the axial direction. The structure of each unit is a spiral reinforced knitted structure and is prepared and formed by adopting a textile technology. The artificial ligament is formed by weaving a medical-grade fiber material or a surface-modified fiber material with biocompatibility. The physical characteristics such as the size, the surface roughness, the surface mesh size, the tensile mechanical behavior and the rigidity of the artificial ligament can be regulated and controlled through the design of a textile weave structure and process parameters. The physical performance of the artificial ligament can be regulated and controlled by changing the preparation process, tissue growth is better promoted so as to be better combined with a marrow tract interface, and the nonlinear stretching mechanical behavior of a natural ligament under the stress working condition is simulated.

The invention discloses a patient-specific finite element model-based vertebroplasty optimization method and a related device. The method comprises the following steps of: constructing a patient-specific three-dimensional spine model according to a vertebral bone structure and a vertebral soft tissue structure; discretizing the patient-specific three-dimensional spine model into tetrahedral finite element grids, endowing each finite element unit with bone material attributes according to pixel values of CT scanning images, and endowing intervertebral disc and ligament soft tissue structures with soft tissue material attributes; determining an optimal bone cement injection path and an optimal bone cement injection amount of the tetrahedral finite element mesh; and simulating the vertebroplasty in the tetrahedral finite element mesh, predicting the stress distribution of the vertebrae, the rigidity of the vertebrae and the stress change of the adjacent vertebrae after the operation, and presenting the simulation result of the simulated vertebroplasty in a three-dimensional visual form. According to the method, personalized optimization and prediction of preoperative simulation of the vertebroplasty are realized by constructing the patient-specific finite element model, and an efficient auxiliary reference operation scheme is provided for an operator.

The present disclosure relates to systems and methods for anatomical and injury modeling. A system can process multimedia and sensor data collected during various anatomical tests, such as mobility tests and muscle, ligament, or tendon assessments, performed by a user. By applying this data to neural network models, the system can generate anatomy scores and subscores for specific body regions, identifying potential vulnerabilities in the anatomy of the user. The system can further generate a personalized conditioning protocol to address these vulnerabilities and reducing the likelihood of injury.

An adjustable construct for fixation of a tendon or ligament graft in a tunnel. The construct comprises a flexible, adjustable loop connected to tissue (for example, graft, ligament or tendon). The adjustable loop may be integrated with an additional tissue supporting device (for example, a wedge or a plug). The tissue is secured within a bone socket / tunnel by adjusting the length of the flexible adjustable loop.

A disposable, sterile guide constructed of medically-acceptable plastic used for compartmentalizing and therefore protecting the ligament or fascia during three different orthopedic surgical procedures: ECTR, ECuTR, and EPFR. This device reduces the risk of damage to any other part of the surrounding anatomy. The device is disposable and packaged so as to be sterile and therefore readily usable by the surgeon means that it can reduce the risk of infection and is a less expensive alternative to traditional non-disposable, metal instruments that must be sterilized prior to each procedure.

The application discloses an ankle joint prosthesis, which comprises a tibia component, a pad and a talus component connected in sequence, and a plurality of bionic ligaments; the tibia component comprises a first intramedullary canal handle and a platform connected to the lower end of the first intramedullary canal handle; the pad comprises a pad body, and the upper surface of the pad body is provided with a cylindrical boss; the talus component comprises a second intramedullary canal handle and a connecting piece connected to the upper end of the second intramedullary canal handle; and the bionic ligaments are connected to the pad and the talus component respectively. The ankle joint prosthesis can completely replace the bone and cartilage of the ankle joint surface, thereby overcoming the problem that the cartilage surface cannot be repaired by an ankle arthroscopy surgery. The ankle joint prosthesis is used for replacing the original damaged ankle joint by using metal and polymer components, so that the discomfort symptom is relieved and the joint activity ability is reserved, and the ankle joint prosthesis is a full freedom ankle joint prosthesis which can completely reserve six activity modes of flexion, extension, inversion, eversion, internal rotation and external rotation.

The utility model discloses a ligament tissue cutting tool. The ligament tissue cutting tool comprises a fixing device and a cutting device, the fixing device comprises a base which is provided with at least one rectangular block capable of sliding and is used for fixing a sample; the supporting device is arranged around the base and used for providing supporting and stability; the two grooves are formed in the top of the supporting device and used for receiving and fixing additional components or tools; the cutting device comprises a top part, two ends of the top part are provided with protruding parts, and the protruding parts are used for assembly connection; and the multiple blades are arranged in parallel, and each blade is perpendicular to the top of the cutting device and used for cutting the sample. The ligament tissue can be simply and conveniently fixed by the tool, and the ligament tissue can be cut into uniform fragment tissues with proper sizes, so that the ligament tissue is favorably digested in follow-up ligament cells.

1. The name of the design product: the plate of the pull muscle. 2. The use of the design product: the trainer for stretching the ligament of the leg. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: the perspective view 1.

The present invention provides an anisotropic chiral honeycomb structure, which relates to the technical field of variant wings, including a plurality of cells periodically arranged in the same plane, wherein the cells are centrally symmetrical structures, and one of the cells includes a ligament, four first through-hole cylinders and four second through-hole cylinders, wherein the four second through-hole cylinders are arranged on the inner side of the first through-hole cylinder, and the ligaments include a first ligament, a second ligament, a third ligament, a fourth ligament and a fifth ligament. The honeycomb structure of the present invention has high out-of-plane stiffness, can bear large aerodynamic loads, and maintain the aerodynamic shape of the wing. At the same time, it breaks through the isotropic limitations of the common four-ligament and six-ligament structures of chiral honeycombs, and realizes the property of having a zero Poisson's ratio in one direction and a negative Poisson's ratio in the other direction, which can meet the complex requirements of wing deformation and improve the aerodynamic performance of the wing in different states.

The invention provides a preoperative planning method for ligament reconstruction operation based on multi-modal data. The preoperative planning method of the ligament reconstruction operation based on the multi-modal data comprises the following steps: acquiring joint medical images of multiple modals of an operation site, and performing registration and fusion processing on the acquired joint medical images of multiple modals to obtain a joint medical image multi-modal fusion result; performing segmentation processing according to the joint medical image multi-modal fusion result to obtain a joint segmentation result; performing key point detection according to the joint segmentation result to obtain a key point detection result; according to the key point detection result, a ligament reconstruction preoperative planning scheme is generated.

The invention discloses a method for constructing a lumbar spinal stenosis animal model, which comprises the following steps of: fixing an experimental rabbit at a prone position, and then forming a 2-3cm incision in the back side of the waist along the longitudinal direction so as to completely expose an intervertebral plate window between a first lumbar vertebra and a second lumbar vertebra; a disposable venous indwelling needle is used for puncturing the ligamentum flavum at the interlaminal window and then puncturing the disposable venous indwelling needle into the spinal canal, and then a metal needle core of the venous indwelling needle is pulled out, so that the soft catheter part of the venous indwelling needle is indwelled in the spinal canal; uniformly mixing PMMA bone cement powder and liquid to prepare fluid bone cement, extracting the bone cement by using an injector, slowly injecting the bone cement into the spinal canal, and removing the soft catheter after injection is completed; the injected bone cement is adhered to the inner wall of the spinal canal after being solidified, so that the inner diameter and the volume of the spinal canal are reduced in physical space, compression on spinal nerves is formed, and the animal model with lumbar spinal stenosis is obtained. The problem that in the preparation process of an animal model, nerves are prone to being damaged, and research test requirements cannot be met is solved.

The invention discloses a dynamic path planning method and system for anterior cruciate ligament tendon dissection, and relates to the technical field of ligament tendon dissection, and the method comprises the following steps: obtaining anatomical structure data of an anterior cruciate ligament tendon and tissue characteristic parameters of a to-be-dissected region; marking key monitoring points in the to-be-stripped area to obtain stripping monitoring points; counting the space distance and the tissue density difference value between the adjacent stripping monitoring points to obtain a to-be-measured space parameter; historical tissue stress distribution characteristics of different anatomical structure types are extracted from historical anterior cruciate ligament tendon dissection operation data, and according to the historical tissue stress distribution characteristics, a dissection path deviation value in the historical operation data and a path correction correlation factor between the to-be-measured spatial parameters are counted; according to the anatomical structure data and the tissue characteristic parameters of the current tendon to be stripped, the effects are that operation errors caused by path deviation are reduced, and the accuracy of operation is improved.

The customized artificial meniscus prosthesis comprises a meniscus body, a joint cotyle is arranged in the middle of the meniscus body, a meniscus joint protrusion capable of simulating the shape and the movement track of a meniscus is installed in the joint cotyle, and a center nail is fixedly connected to the top of the meniscus joint protrusion. The free end of the center nail extends out of the lunar bone body and is arranged in a head-shaped bone of the wrist of the human body, and a plurality of sets of ligament suture holes are further formed in the back side of the lunar bone body. The customized artificial lunar bone prosthesis provided by the invention aims to be applied to lunar bone replacement surgery, mainly aims at treating advanced lunar bone ischemic necrosis caused by non-traumatic or traumatic factors, and is beneficial to improving the stability of the prosthesis and improving the joint activity; basic biomechanics and clinical experiment research verify that the prosthesis has good mechanical properties and clinical curative effects, promote development of the lunar bone prosthesis, enable more patients to retain wrist joint movement, create more values for society and families, and contribute to achieving the goal of healthy China.

The application provides a preparation method of a composite biological scaffold for promoting anterior cruciate ligament repair and a product thereof, and the preparation method comprises the following steps: (1) selecting left-handed polylactic acid or polylactic acid-glycolic acid copolymer with a molecular weight of 250-500,000 to prepare a polylactic acid solution with a concentration of 2-5%, and then performing vacuum defoaming, sealing, slow pre-freezing and freeze-drying to obtain a polylactic acid sponge scaffold; (2) selecting type I or type III collagen with a molecular weight of 50-300,000 to prepare a collagen solution with a concentration of 1-3%, adjusting the pH value of the collagen solution to 6-8, preparing a ruthenium-peroxy disulfate solution, and mixing the collagen solution and the ruthenium-peroxy disulfate solution to obtain a mixed solution; (3) soaking the polylactic acid sponge scaffold in the mixed solution in step (2) under vacuum conditions; and (4) taking out the polylactic acid sponge scaffold, performing in-situ crosslinking through visible light irradiation, and obtaining a composite biological scaffold.

System for controlled stress on a reconstructed or renaturalized ligament of a human or animal body, comprising an anchoring element (10) for implantation into a first bone (41), at least one connecting element (20) and a retaining element (30) for holding the at least one connecting element (20) on a second bone (51), wherein at least one elastomer body (115, 117, 119) is arranged in the anchoring element (10) and the elastomer body (115, 117, 119) is arranged in the interior (102) of an outer body (103) of the anchoring element (10) between a contact surface (101) on the bottom (105) of the outer body (103) and a sleeve (114) to which the connecting element (20) is fixed, wherein the sleeve (114) is immovably fixed to the outer body (103) and wherein at least one elastomer body (125) is arranged in the connecting element (20), wherein the elastomer body (125) has a smaller modulus of elasticity than the connecting element (20), wherein the connecting element is tubular and the elastomer body (125) is arranged in a section of an axial cavity (122) of the tubular connecting element (20).

The invention discloses a crown cutting and traction integrated tool for impacted teeth with inferior alveolar nerve injury risk, which utilizes a telescopic part made of a hydrogel material, has reversible performance of water absorption expansion and dehydration contraction, can realize micro-amplitude reciprocating deformation under the natural water environment change of an oral cavity or humidity control adjustment, and can be used for preventing and treating the impacted teeth with the inferior alveolar nerve injury risk. Therefore, slight stress stimulation in alternating directions is continuously applied to impacted teeth after traction is completed, periodontal ligament activity and an open state of a traction channel are maintained through reciprocating small force action, bridging hard connection between tooth roots and bone tissues is effectively prevented, initial resistance of second-time traction is remarkably reduced, and the secondary traction effect of the impacted teeth is improved. The operation risk of breaking through adhesion tissues again in clinic is reduced, the postoperative nerve traction complications and the tooth root absorption probability are further reduced, and the safety and efficiency of the whole treatment process are improved.

Systems and methods for preparing a ligament graft for a ligament reconstruction procedure are provided. In general, the described techniques utilize a graft preparation system having a holder and a delivery suture assembly removably coupled thereto. The delivery suture assembly can include a spine coupled with an anchor suture configured to form a self-tightening knot used to position the assembly around a graft and a plurality of suture windings configured to be affixed to the graft when the assembly is deployed. The assembly is delivered to the graft using the holder and the sutures can be affixed to the graft without penetrating therethrough. The spine helps to evenly distribute the load among the windings compressing the graft which are thus are capable of withstanding increased loads. Thus, an improved, simplified, and time- and labor-saving approach to preparing ligament grafts is provided.

A composition and methods of making or use thereof include a plurality of fibers forming a shape for augmenting tendon to bone repair. The physical presence of the plurality of fibers provides initial fixation, while the use of an osteoinductive material provides long term enhancement of bone formation around the site of the tendon to bone repair.

The application discloses a chiral negative Poisson's ratio single cell structure with variable ligament thickness and a honeycomb structure, and belongs to the technical field of structural mechanics. The single cell structure comprises a central body and N ligaments distributed in a circumferential array around the central body, wherein N is greater than or equal to 3. Each ligament has a first side surface and a second side surface parallel to the central axis of the central body, and the profile lines of the first side surface and the second side surface are constructed by NURBS curves. The application uses NURBS curves to construct the boundary, so that the ligament has the characteristics of curved configuration and variable thickness, the structure form of the ligament can be flexibly regulated, the structure layout of the chiral negative Poisson's ratio structure is more flexible, the mechanical properties such as the structure strength can be flexibly adjusted according to different application scenarios, and the demand for the complexity and customization of the mechanical properties of the chiral negative Poisson's ratio structure in actual engineering can be met.

Described herein are methods for repairing tissues (e.g., a meniscus, anterior cruciate ligament, rotator cuff, etc.) using collagen implants suitable. For example, the collagen implants are injected into a repair site to heal the tissue. Further described are collagen slurries, injectable collagen implants and methods of preparation thereof.

The application provides a kind of extrusion nail and its assembly for orthopedics, which is applied to the technical field of orthopedic surgical instruments.The extrusion nail adopts a threadless structure and is composed of a nail body, a barb and an extrusion groove, and can be adapted to different length bone tunnels through the head-to-tail matching of multiple nails.The assembly includes an execution end and an impact handle, which can provide linear impact force to realize the linear implantation of the extrusion nail.The application replaces the rotary screwing with linear advancement, fundamentally avoiding the shearing and torsional injury of ligaments, and has the advantages of precise implantation, convenient operation and stable fixation, which meets the clinical needs of orthopedic ligament reconstruction surgery and improves the safety of surgery and the quality of postoperative healing.

The invention discloses a hook knife for collateral ligaments, and relates to the technical field of medical instruments, the hook knife comprises a handle, the front side of the handle is fixedly connected with a connecting rod, the front end of the connecting rod is provided with a movable groove, and the movable groove is internally provided with a knife body assembly for cutting and separating the ligaments; meanwhile, the cutter body assembly is provided with a cutter body in a left cutter form and a cutter body in a right cutter form. According to the hook knife for the lateral auxiliary ligament, when the adjusting frame moves, the limiting blocks on the sides of the adjusting frame can slide along the limiting grooves in the inner sides of the auxiliary grooves, the limiting blocks can be extruded by the inner walls of the limiting grooves, and therefore the two sides of the adjusting frame can generate slight elastic deformation; the limiting blocks can be clamped into the corresponding limiting grooves under the elastic effect of the adjusting frame, so that the position of the adjusting frame is preliminarily limited, it is guaranteed that the left knife and the right knife can be stably kept in the current cutting state, the situation that the positions of the knives are changed due to accidental touch in the surgical operation is avoided, and the cutting precision is guaranteed.

The utility model provides a kind of medical knee joint support pad, comprising: lower pad, lower pad is placed in the downside of knee joint lying position, and the protruding block part of pad in popliteal fossa is equipped on lower pad;Upper pad, upper pad is placed in the upside of knee joint lying position, and the hollow part of open in patella is equipped on upper pad;Cold compress bag, cold compress bag is set on the surface of lower pad and upper pad and knee joint contact;Connecting piece, connecting piece is used to connect lower pad and upper pad in the outside of knee joint.The utility model can surround and support knee joint comprehensively, provide rehabilitation and daily protection effect after knee joint injury.And through the protruding block part on lower pad pad in popliteal fossa, and the hollow part on upper pad makes patella open, so that upper pad, lower pad and its cold compress bag can more comprehensive contact knee joint upside / fore side, so that support pad and cold / heat compress bag more widely contact knee joint surface, relieve bilateral ligament tension, and the cold / heat compress treatment effect of acute knee joint injury initial stage is better.