838 results about "Ligament" patented technology

The invention belongs to the technical field of medical image processing, and particularly relates to an automatic positioning and typing method for cervical posterior longitudinal ligament ossification, which is characterized in that ossification focus spatial distribution characteristics of CT images and spinal cord morphological parameters of MRI images are synchronously analyzed based on CT and MRI images, a vertebral body-ossification-spinal cord spatial relationship is explicitly modeled through anatomical structure topological constraint, and a cervical vertebra-ossification-spinal cord spatial relationship is obtained. Diffuse calcification artifacts, heterogeneity signal interference and multi-modal data registration deviation are overcome, accurate positioning and typing diagnosis of the ossification are achieved, multi-dimensional feature fusion analysis is achieved, the limitation of traditional single iconography index diagnosis is broken through, space continuity and clinical parameters are integrated through a hybrid classifier, and the accuracy of diagnosis is improved. The accuracy and robustness of typing judgment are improved, a structured diagnosis report is automatically generated in the whole process, and the clinical decision-making efficiency and the standardization level are remarkably improved; the principle is scientific and reliable, and the ossification continuity index, the spinal canal invasion rate and the spinal cord compression grading parameters are automatically calculated according to the typing standard.

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.

Certain systems, methods, and devices described herein are configured to dynamically model a patient area for surgery and / or other treatment, dynamically identify one or more features and / or characteristics thereon such as the length and / or elasticity of the posterior longitudinal ligament (PLL), dynamically allow modification of the model, dynamically limit and / or assist in modification of the model, and / or dynamically generate guidelines for generation of patient-specific implants and / or treatment kits for a specific patient.

The invention relates to the technical field of structures, in particular to a cubic double-pole ligament negative Poisson's ratio honeycomb lattice structure which comprises a plurality of honeycomb unit cells which are assembled in a linkage mode. Each honeycomb unit cell comprises two straight edges which are symmetrically arranged, the two ends of each straight edge are respectively connected with a cubic double-pole ligament, the four cubic double-pole ligaments are respectively symmetrical, the opposite ends of the two cubic double-pole ligaments on the same side are connected to linkage edges, and the two linkage edges are symmetrical to each other and are located on the same plane; the two straight edges, the four cubic double-pole ligaments and the two linkage edges form a linkage structure which is connected with each other. The invention aims to provide a cubic double-pole ligament negative Poisson's ratio honeycomb lattice structure, an oblique straight ligament of a traditional concave hexagonal unit cell is modified into a cubic double-pole curve ligament, and the optimization potential of energy absorption and impact resistance is enhanced.

A tissue scaffold for use in a tendon and / or ligament is provided, which includes a weave formed by interlacing warp yarns and weft yarns, wherein the warp yarns include a plurality of fibers with an alternative shaped cross section structure, and the weave includes: a main body area with a bioactive component formed on the fiber surface, and a fixed area comprises the weft yarn having a bioceramic material. The tissue scaffold prepared in the present disclosure has the characteristics of stimulating the growth of tissues and inducing tissue repair, effectively improving the ability of tissue regeneration and bone healing, and is beneficial to the reconstruction of the tendon and / or ligament.

The invention provides a method and system for reconstructing a cartilage surface and electronic equipment, and the method comprises the steps: obtaining an outer contour model of a bone cortex and a mark point set of the cartilage surface, and converting the outer contour model of the bone cortex and the mark point set of the cartilage surface into a preset image coordinate system; obtaining a projection point of each mark point in the mark point set on the cartilage surface on the outer contour of the bone cortex, and determining a coverage area of the projection points; performing elastic stretching on the coverage area of the projection point, and further simulating the wear degree of the cartilage surface to obtain a reconstructed cartilage surface; the problem that muscle or ligament abrasion is caused due to the fact that the influence of cartilage is not brought into prosthesis planning in an existing joint replacement operation is solved, practical and effective guidance can be provided during prosthesis planning and adjusting, prosthesis planning and adjusting are better facilitated, and the prosthesis planning and adjusting efficiency is improved. The intelligent degree, usability and reliability of prosthesis planning in joint replacement are improved to a great extent.

A method for measuring periodontal disease and treating diseases associated therewith includes: obtaining B-mode ultrasound images of a dentition and periodontium of a patient; identifying gingival margin (GM), alveolar bone crest (ABC), cementoenamel junction (CEJ), periodontal ligament (PDL), and gingival edge (GE) biomarkers on the B-mode ultrasound images, the GE biomarker being a part of periodontal soft tissue most distal from a tooth surface; evaluating a metric associated with periodontal disease using one or more of the GM, ABC, CEJ, PDL and GE biomarkers and based at least in part on the evaluating, performing an act that implements and / or adjusts a therapeutic treatment of a periodontal disease.

The utility model provides a posterior cruciate ligament stopping point fracture fixing device which comprises a fixing steel plate, a threaded sleeve and a fixing screw, and a traction hole for a first traction line to penetrate through is formed in one corner of the fixing steel plate; one end of the threaded sleeve is rotatably arranged in the middle of the fixed steel plate, the other end of the threaded sleeve is provided with a threaded hole, and the bottom of the threaded hole is connected with a second pull wire; the fixing screw is in threaded fit with the threaded hole in the threaded sleeve, and the center of the fixing screw is provided with a threading hole for the second pull wire to penetrate through. The device can be implanted under arthroscope micro-creation, and has the advantages of small trauma and less bleeding compared with the traditional open implantation; meanwhile, compared with a loop-shaped steel plate, the bone block is fixed through the pulling force of the screw, the force is larger and more stable, and healing of posterior cruciate ligament dead point avulsion fracture is facilitated; the device is simple in overall structure, low in manufacturing cost, stable in structure and high in popularization value.

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.

The invention provides a multi-disease artificial intelligence surgical robot system for the whole orthopedics department, and the system comprises a total hip joint replacement module which is used for preoperative planning, intraoperative total hip joint replacement and real-time display; the total knee joint replacement module is used for preoperative planning, intraoperative total knee joint replacement and real-time display; the unicondylar joint replacement module is used for preoperative planning, intraoperative unicondylar joint replacement and real-time display; the acetabulum periphery osteotomy module is used for pre-operation planning, acetabulum periphery osteotomy during operation and real-time display; the sports medicine module is used for bone tunnel planning and ligament reconstruction and real-time display; the spine screw placement positioning navigation module is used for positioning navigation and real-time display of intraoperative spine screw placement; and the trauma positioning and navigation module is used for performing trauma positioning and navigation and real-time display during operation. According to the embodiment of the invention, the auxiliary operation can be quickly and accurately carried out.

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.

Multiple systems are described for repairing or replacing anatomic ligaments and tendons utilizing toothed straps and bony anchors incorporating rotatable discs that lock the straps in an axial fashion. Specialized instrumentation is used to prepare the bone and to insert the anchor into the bone while providing proper orientation of the locking disc for accepting the toothed strap.

The invention discloses a dental CBCT three-dimensional tooth rapid labeling method based on an SAM large model. According to the method, an improved SAM network is utilized to distinguish teeth from periodontal membrane and alveolar bone in a CBCT image, and the method comprises the following specific steps: stage 1, conversion and processing from tooth data to trainable data; stage 2, constructing an improved SAM network model; stage 3, training a network model; and a fourth stage of tooth labeling and three-dimensional visualization based on CBCT data. According to the invention, the Lora fine tuning technology is used to help the SAM network adapt to the image characteristics of the medical image data set, so that the defect that the SAM network is only trained on a natural image originally is overcome. In addition, a CNN bypass network is adopted to make full use of spatial information in a three-dimensional slice and help capture edge information in the slice. And finally, a previous prediction result is ingeniously utilized to help to generate a target box prompt to give full play to a prompt mechanism in the SAM network. According to the method, a better tooth labeling effect can be obtained when the same small amount of labels are used for training.

The invention relates to the technical field of medical instruments, in particular to an adjustable bone-to-bone fixing device with a main nail and an implanting mechanism device.The adjustable bone-to-bone fixing device comprises the main nail, a fixing coil, a first auxiliary nail and a second auxiliary nail. Early load-bearing exercise of ankle joints of a patient is facilitated, ankle joint degeneration and traumatic arthritis are reduced, and the risk of fracture of an implant is greatly reduced; compared with elastic fixation, two fixing points are taken on the tibia, one fixing point is taken on the fibula, all the fixing points are connected through sutures, and the length of the sutures is adjustable, so that the tibia can bind the fibula in a surrounding mode through the sutures, compared with a single-strand suture transverse fixation mode, the fixation mode is closer to a native ligament, and fixation is more stable and reliable; and moreover, the micro-motion function between the tibia and the fibula is reserved while the bone removal amount is less.

The device is a tibial plateau leveling osteotomy (TPLO) plate is used to stabilize a stifle joint in an animal in veterinary surgery after a torn cranial cruciate ligament. The TPLO plate has a proximal portion and a distal portion, connected by an offset portion. The proximal portion and at least a portion of the distal portion are formed on two parallel planes.

The invention discloses a chitosan / nano-hydroxyapatite guided bone regeneration membrane with a density composite structure and a preparation method of the chitosan / nano-hydroxyapatite guided bone regeneration membrane. Chitosan is used as an organic matrix, calcium salt and phosphate are induced in situ through a freeze-drying method to be uniformly mineralized and crystallized on the surface of a chitosan polymer chain to form nano-hydroxyapatite, and the chitosan / nano-hydroxyapatite guided bone regeneration membrane with a density composite structure is prepared in combination with a mechanical extrusion method. And oriented crystallization and uniform dispersion of the nano-hydroxyapatite are realized through in-situ induction by virtue of rich functional groups (amino groups) of chitosan, so that the bone mineralization capability is enhanced through nanomechanics. The compact layer of the membrane effectively prevents tissue cells growing fast from entering a tooth root (bone) defect area, the loose porous layer guides periodontal ligament (or bone) cells to collect and provides growth space for the periodontal ligament (or bone) cells, and the optimal tissue regeneration effect is ensured. The invention has the advantages of wide raw material source, cheap price, simple process, environmental protection and easier conversion of finished products, and is expected to be applied to clinical dental bone defect repair.

The novel digital mandibular advancement appliance parameter design method comprises the following steps: step 1, constructing a three-dimensional finite element model comprising upper and lower jawbones, dentition, periodontal ligament, temporal-mandibular joints and a mandibular advancement appliance based on the three-dimensional finite element model; adjusting the boundary of the three-dimensional finite element model through the mandible kinematics parameters to form a simulation boundary; 2, constructing a multi-parameter collaborative prediction model based on the obtained stress data under different combinations of the mandibular protraction amount and the vertical opening amount; based on the stress data, constructing a three-dimensional stress distribution cloud picture by adopting three-dimensional simulation interaction software; 3, inputting the simulation boundary into the multi-parameter collaborative prediction model, and outputting risk early warning information; and 4, determining design parameters of the mandibular advancement appliance based on the three-dimensional stress distribution cloud picture and the risk early warning information. According to the method, the parameters of the appliance are customized, and the designed forward movement amount and the opening amount of the appliance better conform to personal characteristics.

The invention belongs to the field of external application, and particularly relates to a preparation method of glucosamine chondroitin cream for relieving discomfort of bones, muscles and ligaments, which comprises the following steps: collecting preparation node characteristic indexes of linear preparation nodes and characteristic indexes of purification liquid and centrifugal tubes of purification equipment of the preparation nodes at all levels, and dividing the linear preparation nodes into preposed and continuous preparation nodes; a purification result of the front purification equipment of the front preparation node is input into the continuous purification equipment of the continuous preparation node to serve as a purification raw material; according to the concentration information of the pre-purification equipment and the continuous purification equipment, the purification intermediate waste amount of a linear preparation node, the natural oxidation raw material amount and the corresponding glucosamine chondroitin cream increment are calculated by combining the characteristic indexes of the preparation node and the characteristic indexes of the purification liquid and the centrifugal tube; and the purification equipment of the linear preparation node is scheduled, so that the purification equipment runs in an optimized state. The method reasonably reduces purification intermediate wastes, optimizes the purification liquid, effectively fuses products in an environment range, and brings great economic benefits to enterprises.

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 utility model discloses an adjustable knotless orthopedic ligament reconstruction internal implant, which belongs to the technical field of orthopedic implants and comprises a fixing plate, a fixing ring device and a fixing line, and a pair of first threading holes is arranged in the middle of the fixing plate; the fixing ring device comprises a fixing ring and a button fixing piece, the button fixing piece comprises a button body and a retaining ring located on the inner side of the button body, a second threading hole is formed in the retaining ring, a containing groove used for containing the button body is formed in the fixing ring, and a through hole allowing the retaining ring to penetrate out is formed in the bottom wall of the containing groove; the fixing line is wound in the first threading hole and the second threading hole to form a loop ring, the two ends of the fixing line penetrate through the bottom wall of the containing groove and then penetrate out of the containing groove from the side face of the containing groove, and clamping points used for clamping the two ends of the fixing line are formed between the containing groove and the button body. The device is high in tensile strength, accurate in ligament reconstruction positioning and good in fixing effect.

The invention discloses an anterior cruciate ligament reconstruction postoperative intelligent evaluation system based on artificial intelligence. The system comprises a data acquisition module used for collecting clinical information and MRI image data of a patient; the ligament graft maturity evaluation module is used for automatically measuring and calculating the maturity of the anterior cruciate ligament graft; the tendon-bone interface healing evaluation module is used for automatically measuring bone tunnel diameter changes and tunnel surrounding edema changes. Accurate evaluation and personalized suggestions are provided for postoperative recovery of anterior cruciate ligament reconstruction patients.

The present invention provides a method for preparing a keratinized gingival repair scaffold, wherein the active powder of biological microspheres is dispersed in a protein slurry to obtain a loose surface stock solution, which is freeze-dried together with a cell-free matrix material, and after two cross-linkings, a keratinized gingival repair scaffold with a loose surface and a dense surface is obtained. When in use, the loose surface of the porous sponge structure contacts the wound surface, which is conducive to the attachment and growth of tissue cells, and the dense surface can seal and protect the wound to a certain extent in an open healing environment. The obtained keratinized gingival repair scaffold can effectively maintain and regulate the pH environment in the oral cavity, inhibit bacteria and resist bacteria, and inhibit the growth of acid-producing bacteria such as Streptococcus mutans and bacteria with strong caries-causing properties, and at the same time has the ability to stop bleeding, promote bone growth and periodontal ligament regeneration, and inhibit periodontal epithelial regression.

The invention belongs to the technical field of medical apparatus and instruments, and aims to solve the problems that a guide wire can be guided only through assistance of a rear approach after a tibial tunnel is established for posterior cruciate ligament reconstruction at present, and an arthroscope cannot see a tibial dead point of a posterior cruciate ligament only through a front approach, so that a doctor lacks direct visual reference when operating the guide wire to guide in; the invention provides a posterior cruciate ligament reconstruction guide wire capturing system, aiming at solving the technical problems that the positioning difficulty and the error risk are increased because the posterior cruciate ligament reconstruction guide wire capturing system only depends on experience and indirect image assistance, and comprises a handheld grab handle, a positioning sleeve, a positioning crank arm and a positioning end, and further comprises a tibia guide wire mechanism and a guide wire capturing mechanism, the tibia guide wire mechanism is arranged in the positioning sleeve in a sleeved mode and used for guiding in a guide wire through a tibia tunnel. The guide wire capturing mechanism is rotationally connected with the positioning end and used for capturing and locking the guide wire, and the guide wire can conveniently penetrate out of a bone tunnel behind the tibia. The guide wire can be captured and locked, the guide wire can be conveniently guided in, and the positioning difficulty and the error risk are reduced.

Methods and devices for the repair of a torn or injured ligament or tendon are provided. The methods include the use of multiple scaffolds, e.g., beads. The multiple scaffolds may be positioned along a suture or other device such that they are moveable with respect to one another or the injured tissue.

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 utility model relates to the technical field of medical apparatus and instruments, in particular to an arthroscope anterior cruciate ligament stump measuring instrument which comprises an arthroscope connecting block, an arthroscope tube is installed on one side of the arthroscope connecting block, a sliding cavity is formed in the arthroscope tube, a reset spring rope is installed in the sliding cavity, a piston pad is installed in the sliding cavity, and the piston pad is connected with the arthroscope connecting block. One end of the reset spring rope is connected with one side of a piston pad, a measuring tube is installed on one side of the piston pad, scale marks are arranged on the outer side of the measuring tube, a connecting tube is installed on the outer side of the mirror tube, and a telescopic air tube is installed at one end of the connecting tube. According to the utility model, the mirror tube extends into the body of a patient, and the sliding cavity is formed in the mirror tube, so that the shape characteristic of the mirror tube is not changed, the minimization of the wound area of the patient is ensured, and the effect of the original minimally invasive surgery is kept.

The present invention relates to a system and method for load and gap balancing in knee replacement surgery. The system incorporates sensor devices, such as load cells, pressure, ultrasound or optical, to accurately measure gaps and ligament tensions within the knee joint during surgery. Additionally, a tensioner device, which can be a manual spreader, a spring-loaded mechanism, or a motorized linear actuator, is employed to tension the medial and lateral collateral ligaments, as well as patella tendon, based on the measured data. These real-time measurements are transmitted to a computer or robotic surgery system, which provides real-time visualization of the data and assists the surgeon in determining the appropriate gap and ligament tension for each individual patient. Using soft tissue analysis, the real-time sensor data can be displayed on a computer recommending appropriate gap and ligament tension, implant size and shape, and individualized knee alignment based on optimal outcome.

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.