553 results about "Articularis genus" patented technology

Devices and methods for articulating a distal end of a surgical device are provided. In one exemplary embodiment, the device includes an articulation joint that includes both an inner guide and an outer sleeve. The inner guide includes one channel extending therethrough that receives both a cutting mechanism and a closure band. Further, an outer surface of the inner guide, in conjunction with the outer sleeve, can define two additional channels that each receive an articulation band for articulating an end effector coupled to the articulation joint. The outer surface of the inner guide can include a plurality of ribs that also help define the two additional channels. Further, the outer sleeve can include a plurality of slots formed in it to improve flexibility and stability. Additional configurations of articulation joints, and configurations of components of a surgical device, are also provided, as are methods for using the same.

Implants for the fusion or fixation of two bone segments are described. For example, the implants can be used for the fusion or fixation of the sacroiliac joint. The implants can have a matrix structure, have a rectilinear cross-sectional area, and have a curvature.

The invention provides an artificial intelligence auxiliary diagnosis method and system for a knee joint, and the method comprises the steps: synchronously collecting a multi-angle dynamic X-ray image and six-degree-of-freedom contact force distribution data in an articular cavity, dynamically tracking a patella sliding track, and generating a mechanical phase track; a personalized knee joint model is constructed in combination with the biological parameters of the lower limbs of the patient, the mechanical phase trajectory and the contact force data vector are superposed to generate a dynamic mechanical fingerprint, and then the dynamic mechanical fingerprint is mapped into a biomechanical attribute map; electromyographic signal time-frequency characteristics and tibia rotation angles in the movement process are collected, an electromyographic activation mode is constructed, and the electromyographic activation mode and a biomechanical attribute map are subjected to characteristic fusion to form a joint dynamics comprehensive contour; analyzing a stress wave conduction path by using a joint anomaly dynamic propagation model to identify a compensatory injury mode; a diagnosis map is generated according to the recognition result, a preset biomechanical constraint condition is matched to correct the diagnosis map, and an individualized rehabilitation strategy is formulated. The treatment effect is improved, and the recovery speed of a patient is increased.

A patient specific instrument is disclosed for correcting a condition present in a patient. The patient specific instrument includes a body that includes an inferior side having a bone engagement surface shaped to match a first surface of a first bone and a second surface of a second bone of a joint. The instrument also includes a superior side having a first guide feature and a second guide feature that together, with the bone engagement surface overlying the first surface and the second surface, are positioned to guide resection of the first bone and the second bone during a surgical osteotomy for correcting the condition. The body is configured to seat transverse to the joint with the bone engagement surface engaging the first surface of the first bone and the second surface of the second bone.

The invention discloses a low-speed reciprocating type curved surface friction testing machine for simulating human knee joints, and relates to the technical field of testing material friction performance, the low-speed reciprocating type curved surface friction testing machine comprises a machine body, the machine body is movably provided with an upper clamping assembly for clamping an upper experiment piece and a lower clamping assembly for clamping a lower experiment piece; the machine body is also provided with a lifting driving mechanism for driving the lower clamping assembly to move upwards, and the lifting driving mechanism drives the lower experiment piece to ascend to enable the top of the lower experiment piece to abut against the bottom of the upper experiment piece with preset pre-pressure so as to simulate the load state of the knee joint of the human body; the machine body is further provided with a swing driving device for driving the upper clamping assembly to swing back and forth, and the swing driving device drives the upper experiment piece to swing back and forth so that friction can be formed between the upper experiment piece and the lower experiment piece to simulate friction movement of the knee joint of the human body. Friction movement of a human knee joint in a load state is simulated, so that an in-vitro experiment on a human knee joint prosthesis material is realized, and medical negligence caused by unqualified materials is avoided.

Systems, methods, and devices for sacroiliac joint fusion described include an implant comprising a first body having a distal anchor and a second body having proximal anchor. The first body includes a threaded body integrally formed with the first body or threadably coupled to the first body. The distal anchor may be formed by a pair of deployable wings. The pair of deployable wings may be deployed within the cancellous bone of the sacrum and anchored against the cortical bone of the sacrum. The proximal anchor may engage with an outer surface of the ilium. The second body may be threaded along the threaded body to provide compression across the sacroiliac joint. Compressing the sacroiliac joint can reduce motion thereof to promote fusion and stabilization.

A method includes receiving by a controller, a surgeon-specific surgery profile for an implantation of an implant into a joint, implant profiles, a patient-specific post-surgery desired functional profile of the joint after the implantation, and bone registration data for a first bone member and a second bone member of a patient are inputted into a surgical plan model to generate a surgical plan. The surgical plan model is designed to achieve the patient-specific post-surgery desired functional profile based at least in part on a plurality of dependencies between a plurality of surgical parameters, the implant profiles, at least one functional parameter representative of the expected functional performance of the joint, and movement-related data of the joint. The surgical plan is outputted on a graphical user interface (GUI) on a surgery assistant device to facilitate the implantation.

Embodiments of the inventive concepts disclosed herein are directed to an angular digital device for loss of distal joint extension. A device formed from a thin, rigid material shaped to fit the dorsal soft-tissue contour of the middle phalanx of a digit with one or more apex volarly angled distal projections which arise at the level of the distal interphalangeal joint and with a thin sling of material secured to the distal projection(s) by which the volar pad of the distal phalanx is supported in order to provide hyperextension of the distal joint of the digit while maintaining tactile function of the pad of the digit.

An implantable device for sacroiliac (“SI”) joint fusion and an associated method employ an SI joint fusion portion and an anchor portion of smaller diameter than the SI joint fusion portion and that extends distally from a distal end of the SI joint fusion portion. The SI joint fusion portion is externally threaded and is configured to, when surgically implanted, extend across the SI joint. The anchor portion in turn extends distally from the SI joint fusion portion and is configured for implanting entirely within the patient's ilium adjacent the SI joint. In certain configurations, the joint fusion portion is configured to enable fixation of spinal equipment at a proximal end of the joint fusion portion. A stabilizing driver is additionally provided to aid in placement of the device when obstructions are present.

The invention relates to the technical field of exoskeletons, in particular to a high-degree-of-freedom light lower limb assisting exoskeleton. The invention provides a high-degree-of-freedom light lower limb assisting exoskeleton. The high-degree-of-freedom light lower limb assisting exoskeleton comprises a back assembly, a waist assembly, hip joint motors, thigh assemblies, knee joint motors, shank assemblies and ankle joint and foot assemblies which are sequentially connected. Wherein the thigh assembly comprises a hip joint motor connecting piece, a thigh rod and a knee joint motor connecting piece which are connected in sequence, and the end, close to the hip joint motor connecting piece, of the thigh rod is hinged to the hip joint motor connecting piece through a first hinge shaft. The multi-degree-of-freedom hip joint mechanism and the multi-degree-of-freedom knee joint mechanism are adopted, so that the exoskeleton can better coincide with contour curves of all parts of a human body and better adapt to complex movement of human joints, and the problems that the exoskeleton is poor in wearing comfort, effective assisting force is lost and the like due to man-machine discordance are solved.

The present invention relates to a system for determining the angle of osteotomy. The system comprises a plurality of liners, a pressure measurement apparatus and a processing module. Each liner comprises a liner body having an upper surface and a lower surface. A longitudinal distance between a slope region of each upper surface and a planar region of the upper surface gradually increases from a position near the geometric symmetry central axis of the liner to both sides of the liner, so as to define the degree of a tilt angle. The pressure measurement apparatus is used for measuring a pressure applied by each of two extremity sides of a bone joint, so as to determine a pressure difference value. The processing module is configured to determine an angle of osteotomy for the extremity sides on the basis of the tilt angles of the liners that balance the tension of the two extremity sides. The present invention restores the tension condition in a real working state of a joint before osteotomy and takes into account the balance state of the tension of soft tissue as a consideration for the angle of osteotomy, thereby effectively solving the problem of unbalanced tension between soft tissue at the inner and the outer sides of knee joints after total knee arthroplasty, and keeping the original mechanical performance of knee joints of patients after surgery.

The invention relates to a control method of an artificial limb knee joint. According to the technical scheme, the control method comprises the steps that a heel pressure sensor signal Ph, a sole pressure sensor signal Pf and an inclination angle theta and an angular velocity omega output by a shank inertial measurement unit are obtained in real time; when it is detected that the Pf decline rate exceeds a preset multiple threshold value of the heel pressure decline rate, dynamically calibrating an inclination angle reference theta base and calculating an offset theta cal; dividing six stages of a gait period based on the theta < cal > and the pressure signal, and calculating period duration T; a step speed-damping mapping knowledge base is constructed, and the damping opening degree in the early stage of swing is optimized through iterative learning; finally, the adjusted U value is applied in the early stage of swinging, and fixed damping is kept in other stages. The method is mainly used for improving the walking naturalness and terrain adaptability of the artificial limb at different speeds.

The invention discloses a lower limb leg-foot structure with jumping ability and a biped robot. The lower limb leg-foot structure comprises a thigh assembly, a shank assembly and a foot assembly which are sequentially connected from top to bottom. A thigh body, a knee joint rocker arm and a shank pull rod of the thigh assembly and a shank body of the shank assembly form a four-bar mechanism. The thigh body, the knee joint driving motor and the knee joint rocker arm form a slider-crank mechanism. The four-connecting-rod mechanism and the slider-crank mechanism form a set of combined mechanism through the common knee joint rocker arm so as to drive the knee joint to rotate. According to the combined mechanism, the linear motion speed of the knee joint driving motor is amplified into the rotation angular speed of the knee joint through the variable reduction ratio amplification effect of the four connecting rods, and the lower limb of the knee joint driving motor has the explosive jumping ability under the condition of the conventional output speed.

This conversion device acquires skeleton information in which a plurality of joints included in a human body and coordinates for the plurality of joints are set, and reference posture information in which a plurality of joints included in the human body and reference coordinates for the plurality of joints are set. The conversion device specifies, from the plurality of joints set in the bone information, a second joint corresponding to the first joint set in the reference posture information. The conversion means calculates a relative rotation angle from a reference coordinate of the first joint to a coordinate of the second joint, and sets the relative rotation angle in the hierarchical structure data, thereby converting the bone information into the hierarchical structure data.

An insert for use in a knee prosthesis is disclosed. In one embodiment, the insert includes a medial compartment and a lateral compartment. The medial compartment includes a top surface having a concave surface or curve with a more posterior sulcus and increased anterior lip. The lateral compartment includes a top surface having at least a segment or portion with a convex surface or curve. Thus arranged, the insert is arranged and configured to provide improved stability for varying grades of PCL deficiencies compared to existing inserts that have a mid-line sulcus and lateral convexity. In addition, the insert provides improved lateral posterior translation compared to existing designs with a concave or flat lateral articulation that lack a lateral posterior convexity.

A fusion plate (1, 20) to assist fusion of a first bone (2) and second bone (3) comprising a rigid elongated plate configured to span the joint between the first and second bones having a C-shaped profile along its length, a thickness of 0.5 to 1.5 mm, and a plurality of holes (11) to receive bone-fixing screws (12) to fix the plate to the first and second bones, wherein the plurality of holes include at least one proximal hole disposed on each side (9, 10) of a proximal end (7) of the plate configured to receive proximal bone fixing screws (12) in an orthogonal fixing screw configuration and at least one hole disposed on each side (9, 10) of a distal end (8) of the plate configured to receive distal bone fixing screws in an orthogonal fixing screw configuration. The plate may be configured for dorso-medial attachment and fusion of a meta-tarsal joint selected from a MetaTarsoPhalangeal joint (MTPJ) and a TarsoMetaTarsal Joint (TMTJ) of the big toe.

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.

A method for designing a uni-compartmental orthopaedic prosthesis includes generating a three-dimensional statistical model of a knee joint, determining a curvature of a section of a bone of the knee joint represented by the three-dimensional statistical model, and designing a section of the uni-compartmental orthopaedic prosthesis corresponding to the section of the bone of the knee joint to have a curvature that matches the curvature of the section of the bone of the knee joint. Additionally, a tibial and femoral uni-compartmental orthopaedic prosthesis are also disclosed, each of which includes a section having a curvature that matches a corresponding section of a corresponding bone of the knee joint represented by the three-dimensional statistical model.

The present invention addresses the problem of providing a garment that restrains the outward rotation of a lower leg which is likely to occur when walking and prevents the twist of a lower limb when squatting down.　The problem has been solved by a garment that comprises a cloth for a hip joint section including a belt-like first strongly tightening part having an upper end as a waist part and passing through a region corresponding to the closest downside of the great trochanter and having the inside of the thigh as a lower end, and a second strongly tightening part having an upper end as a waist part and passing through the front surface of the hip joint and passing through the rear surface of the thigh from a region corresponding to the downside of the great trochanter and having the inside of the thigh as a lower end and / or a cloth for a knee joint section including a belt-shaped third tightening part from the downside of the tuberosity of the tibia to the vicinity of the tuberosity of the tibia, the lateral epicondyle of the femur and the inner aspect of the thigh upward of the rear side of the knee joint, and a belt-shaped fourth tightening part comprising a linear first section from the downside of the splint bone to the lateral epicondyle of the femur and a linear second section from the lateral epicondyle of the femur to the inner aspect of the thigh upward of the lateral epicondyle of the femur.

Kits and methods for use in intraoperative trialling of hip prostheses to determine an appropriate length for the femoral neck component of a prosthetic hip joint, are described. A kit for use in selecting a femoral neck component of an orthopaedic joint prosthesis kit comprises a first and a second broach. Each of the first and second broaches has a neck connection element comprising a projection extending from a proximal surface of the broach, each projection having a length. The projection on the first broach has a different length than the projection on the second broach. The kit also includes a trial femoral neck component having a neck connection element in the form of a recess in a distal surface. The recess is configured to mate with the projection on each of the first or second broaches such that mating of the trial femoral neck component with the first broach provides an assembly with a first neck length, and the mating of the trial femoral neck component with the second broach provides an assembly with a second neck length.

In one implementation, we describe the semantics of skeleton joints of the avatar to be animated as a mapping to a highly-detailed skeleton model containing most or all of the joints and bones of human anatomy (the "reference skeleton"). Such a reference skeleton (e.g., the "LOA-4" version of the Web3D humanoid skeleton model) features detailed models of the hand and foot phalanges and joints for every vertebra of the spine. Owing to the level of detail of the reference skeleton, each joint of a user-defined animation skeleton can be mapped to one of the joints of the reference skeleton. The identification and location of each joint in the user-defined skeleton on the human body is thereby accurately and unambiguously described. Such semantics can be used in implementing some features of a virtual world platform, for example, in automated action or gesture recognition.

Disclosed in the present invention is a lower-limb-powered exoskeleton device for rehabilitation assistance, comprising ankle-joint sagittal-plane driving units, knee-joint sagittal-plane driving units, hip-joint sagittal-plane driving units, a hip-joint horizontal-plane driving unit, a joint driver connecting frame, a lower-limb fixing support, sensors, a controller and a power supply. Antagonistic-drive-type linear driving units are used in the sagittal plane of a hip joint so as to enable the bending and extension movements of the hip joint, and a linear driving unit having the function of self-locking when powered off is used in the horizontal plane of the hip joint so as to enable the turning movements of the exoskeleton; and a linear driving unit in cooperation with a magnetorheological brake is used in the sagittal plane of each knee joint, thereby significantly reducing the power consumption of a knee-joint driver while lowering the control difficulty. The powered exoskeleton device can help patients with an impaired lower-limb motor function to carry out walking rehabilitation training.

Disclosed herein is a system and method for performing pre-operative planning of total joint arthroplasty. The planning tool builds a model and analyzes and visualizes movement of the joint for various selections of implant models and placement of the components on the implants on the patient's anatomy. The tool also analyzes and visualizes motions of the joint during common activities of daily living and analyzes and functional ranges. The tool provides real time clinically relevant parameters to inform pre-surgery planning. The tool provides screw orientation visualization.

The invention discloses a bionic biped robot with variable rigidity joints and double-joint flexibility, which comprises a trunk, thighs, variable rigidity knee joints, shanks and feet, and the double-joint flexible part of each leg is driven by three elastic drivers connected in series; a front-side linear motor of the rigidity-variable knee joint is rotationally connected to a mounting frame at the lower end of the thigh, and an output shaft of the front-side linear motor is connected with one end of an L-shaped connecting piece; the rear-side linear motor is mounted on the mounting frame, an output shaft of the rear-side linear motor is sequentially sleeved with a rear-side shell, a rear-side spring and a front-side shell and then fixed to the output end connecting piece, and the two sides of the rear-side spring make contact with the rear-side shell and the output end connecting piece respectively; a rope is led out from the tail end of the front side shell, is wound on a rear side shaft and a knee joint shaft in sequence, penetrates through two pairs of rollers and is fixed on a knee joint output shaft; the rollers are installed at the other ends of the L-shaped connecting pieces, and the knee joint shaft is connected with the switching parts of the two L-shaped connecting pieces through bearings. The robot has good stability, flexibility and adaptability.

The invention discloses a lower limb exoskeleton robot layered cooperative walking aid control method. The method comprises the steps of data acquisition and preprocessing; human-machine coupling dynamics modeling is carried out, and required moments tau < hip >, tau < knee > and tau < ankle > of the hip joint, the knee joint and the ankle joint are obtained; low-layer joint control, including hip joint moment, knee / ankle virtual impedance moment and friction compensation calculation; middle-layer multi-axis cooperation and gait phase judgment; high-rise energy is optimally distributed, assistance is distributed to three joints in a phase and a safety boundary, meanwhile, the requirements for labor saving and stability are considered, a minimization problem is written in a unified mode, J serves as the total amount, and torque of the hip joint, torque of the knee joint and torque of the ankle joint are solved in a combined mode; according to the step-by-step self-adaption of myoelectricity driving, in order to cope with human body fatigue changes, step-by-step updating is carried out on the virtual stiffness within the movement distance. The method has the advantages of improving man-machine cooperation level, man-machine adaptability and walking aid efficiency.

In some embodiments, an implant configured to span a joint between a first bone and a second bone may include a proximal end configured to reside in the first bone, a distal end including threads configured to reside in the second bone distal to the first bone in response to rotation of the implant about an axis of rotation, an axis extending between the proximal end and the distal end, and an exterior surface extending from the proximal end to the distal end. The exterior surface may include a first recess formed therein. The first recess may include an undercut such that the first recess has a first perimeter at an exterior of the first recess, and a second perimeter, greater than the first perimeter, at an interior of the first recess, wherein the interior is closer to the axis than the exterior.

The invention discloses a lower limb of a robot and a humanoid robot. The lower limb of the robot comprises thigh parts; the hip joint is arranged at one end of the thigh part and is rotationally connected with the thigh part; the shank part is rotationally connected with the other end of the thigh part; the first dampers are arranged on the thighs and connected with the hip joints, and the first dampers are used for sharing loads borne by the hip joints and buffering movement of the hip joints; the second damper is arranged on the shank part and connected with the thigh part, and the second damper is used for sharing the load borne by the knee joint and buffering the movement of the knee joint. According to the lower limb of the robot, the passive load bearing capacity of the hip joint and the knee joint can be remarkably improved through the first damper and the second damper under the condition that the power of the joint active actuator is certain, the dampers can effectively share loads, locked-rotor energy consumption of the hip joint and the knee joint is reduced, stable operation of the joint is ensured, and the reliability of the robot is improved. Therefore, the movement is more efficient, safer and more reliable, and the service life loss of the motor is greatly reduced.

Threaded sacro-iliac joint stabilization (e.g., fusion, fixation) implants and methods of implantation and manufacture. Some implants include a threaded distal region, an optionally threaded central region, and an optionally threaded proximal region. The distal, central, and proximal regions have lengths such that when the implant is laterally implanted across a SI joint, the distal region can be positioned in a sacrum, the central region can be positioned across an SI-joint, and the proximal region can be positioned in an ilium.

The present application relates to an intelligent knee joint for human lower limb exoskeleton, prosthesis, or orthosis. The intelligent knee joint reproduces part or all of the biomechanical characteristics of the human knee joint by adopting a motor drive unit in combination with a controllable spring energy storage unit based on a magnetorheological damper, or adopts a controllable resistance unit in combination with a controllable elastic energy storage unit based on a magnetorheological damper, thereby helping the wearer to better reduce the burden of walking and regain or repair the walking function. The motor drive unit operates in generator mode and driver mode, and the energy recovery technology is used to reduce the power consumption of the intelligent knee joint and extend the working time of the device. In addition, the use of a controllable elastic energy storage unit based on a magnetorheological damper further reduces the energy consumption of the intelligent knee joint, while also simplifying the control difficulty of the knee joint.