42 results about "Knee joint ligament" patented technology

A method for reconstructing a knee ligament and for performing a tibial osteotomy on the knee in a single procedure, the method comprising:forming a bone tunnel through the tibia at a location appropriate for the ligament reconstruction, disposing a graft ligament in the bone tunnel, and securing the graft ligament in the bone tunnel, and forming a wedge-like opening in the bone at a location appropriate for the tibial osteotomy, positioning an osteotomy implant in the wedge-like opening in the bone, and securing the osteotomy implant in the wedge-like opening in the bone;wherein the osteotomy implant is secured in the wedge-like opening in the bone with a fastener which extends through the implant and into the bone tunnel.

Surgical anchoring systems and methods are employed for the correction of bone deformities. The anchoring system and its associated instrument may be suitable for surgical repair of hallux valgus, tarsometatarsal sprains, ankle ligament reconstruction, spring ligament repair, knee ligament reinforcement, acromioclavicular sprains, coracoclavicular sprains, elbow ligament repair, wrist and hand ligamentous stabilization or similar conditions. The anchoring system may include a fixation system for anchoring two or more sections of bone or other body parts and a system for aligning of one section relative to another section.

A method and construct for joint repair in which attachment of a double bundle graft ligament approximates anatomic orientation using interference fixation in a single bone tunnel. The double bundle graft features separable strands. A threaded screw is inserted between the separable strands and provides interference fixation of the graft against radially opposing walls defining the bone tunnel. Attachment of the graft using separated strands more closely approximate the configuration of the native ligament. The resulting reconstruction exhibits mechanical functionality that more accurately mimics that of the intact joint, with a minimum of associated tissue morbidity.

Surgical anchoring systems and methods are employed for the correction of bone deformities. The anchoring system and its associated instrument may be suitable for surgical repair of hallux valgus, tarsometatarsal sprains, ankle ligament reconstruction, spring ligament repair, knee ligament reinforcement, acromioclavicular sprains, coracoclavicular sprains, elbow ligament repair, wrist and hand ligamentous stabilization or similar conditions. The anchoring system may include a fixation system for anchoring two or more sections of bone or other body parts and a system for aligning of one section relative to another section.

Methods and systems are described to quantitatively determine the degree of soft tissue constraints on knee ligaments and for properly determining placement parameters for prosthetic components in knee replacement surgery that will minimize strain on the ligaments. In one aspect, a passive kinetic manipulation technique is used in conjunction with a computer aided surgery (CAS) system to accurately and precisely determine the length and attachment sites of ligaments. These manipulations are performed after an initial tibial cut and prior to any other cuts or to placement of any prosthetic component. In a second aspect, a mathematical model of knee kinematics is used with the CAS system to determine optimal placement parameters for the femoral and tibial components of the prosthetic device that minimizes strain on the ligaments.

A unique athletic shoe sole that is constructed of two more separate pieces designed to release when a predetermined longitudinally directed force is applied. A releasable athletic shoe sole includes a detachable lower sole; a mechanical release mechanism constructed to release when a predetermined force is applied; and a longitudinal guiding element. The longitudinal guiding element allows the lower sole to detach specifically in a longitudinal direction. The longitudinal direction of release prevents knee ligament injuries, particularly ACL injuries.

<heading lvl="0">Abstract of Disclosure< / heading> A femoral guide for precisely positioning a guide wire on a bone surface of the femur includes a body having a lumen for receiving a guide wire and a tongue protruding from the body for engaging an edge or reference point on the bone surface with the tongue being spaced a predetermined distance from a longitudinal axis of the lumen. The lumen includes an opening allowing a guide wire extending through the lumen to contact the bone surface at a location spaced from the edge substantially the predetermined distance with the tongue engaging the edge. A stylus on the body can be driven into the bone to secure and stabilize the femoral guide prior to driving the guide wire into the bone through the lumen. With the guide wire driven into the bone, a bone tunnel can be formed substantially concentrically or coaxially along the guide wire such that a longitudinal axis of the bone tunnel will be disposed from the edge substantially the predetermined distance. Methods of precisely forming bone tunnels include the steps of engaging an edge of a bone surface with a tongue of the femoral guide, inserting a guide wire through a lumen of the femoral guide, driving the guide wire into the bone through the lumen and forming a bone tunnel in the bone along the guide wire such that a longitudinal axis of the bone tunnel will be disposed from the edge engaged by the tongue a distance substantially equal to the distance that the tongue is disposed from a longitudinal axis of the lumen.

A device for measuring displacement of the tibia in relation to the femur in response to an applied force or torque on the tibia. A first shaft is tiltable about a first axis close to the ankle and approximately parallel to the coronal plane of the patient's body. A second shaft is connected to the first shaft and is rotatable about a second axis perpendicular to the first axis, and is close to the ankle and approximately parallel to the tibia. A foot support platform is mounted on the second shaft, the foot support platform being configured for attachment of the foot at a fixed position. A displacement test device is provided for applying forces to the tibia and measuring the shift or displacement of the proximal tibia relative to the distal femur.

A system and method for determining laxity in an anatomical joint. The system includes a force sensor that measures a force applied to an appendage that is coupled to a joint and a position sensor that determines the amount of movement of the appendage when the force is applied to the appendage. The system also includes a system controller that is connected to both the force sensor and the position sensor and allows communications between the sensors.

The invention relates to the technical field of medical apparatus and instruments, and in particular relates to a coracoclavicular ligament reconstruction device. The coracoclavicular ligament reconstruction device comprises a first button steel plate, a second button steel plate, an artificial ligament and a bone-attaching steel plate, wherein the first button steel plate and the second button steel plate are of plate-shaped structures, at least two limiting holes are formed in each of the first button steel plate and the second button steel plate, and the artificial ligament passes through the limiting holes of the first button steel plate and the second button steel plate during matched use. The coracoclavicular ligament reconstruction device has the beneficial effects that the device belongs to a joint dislocation or ligament reconstruction fixing device capable of realizing the adjustment on the length of the artificial ligament according to the practical conditions of the individual differences of patients, and the coracoclavicular ligament reconstruction device can play the fixing role in joint dislocation or ligament reconstruction, and is also applicable to the restoration and reconstruction including acromioclavicular joint dislocation restoration and reconstruction, knee-joint ligament reconstruction, intra-articular avulsion fracture restoration and reconstruction and the like.

The invention relates to a knee joint ligament injury assessment device and a method thereof. The device comprises a housing, a rotating rod, a pull rod, a knee fixation device, a tibial fixation device, an angle acquisition device, a tension acquisition device, a posture data acquisition device and a processor; the tension acquisition device collects a current lifting force value corresponding toeach moment of a first test; the angle acquisition device collects a current angle value corresponding to each moment of the current first test; the attitude data acquisition device collects the current attitude data corresponding to each moment of a current second test; the processor uses the current lifting force value, the current angle value, and a knee anteroposterior cruciate ligament classification evaluation standard to determine the knee anteroposterior cruciate ligament injury evaluation result; and the current posture data and the knee joint collateral ligament classification evaluation standard are used to determine the evaluation results of knee joint collateral ligament injury. The accuracy of the knee ligament injury evaluation result and the convenience of the knee ligament injury evaluation test can be improved.

The invention relates to a stress inspection device for knee-joint ligaments. The stress inspection device comprises a pressure measurement meter and a bodily contact component connected with the pressure measurement meter, and a patella side pressing plate or a thigh shin pressing plate is fixedly arranged at one end of the bodily contact component. According to the stress inspection device, the positive rate is greatly improved when damage to the knee-joint ligaments is inspected, the objective stress can be provided, damage to a patient can be avoided, the stress inspection device is convenient to use, economical and practical, and convenient, effective and accurate imaging diagnostic basis and evidences are provided for inspecting and treating the damage to the knee-joint ligaments of the patient.

A surgical tensioning assembly providing a means to apply a variable and selective force to tissues, such as replacement ligaments, during a ligament reconstruction surgery. The assembly provides a means to apply a selective, measurable and a generally balanced force on multiple tissues. One embodiment of the tensioning assembly includes a set of subassemblies, namely an engagement subassembly, a variable force subassembly and an equalizing subassembly. These subassemblies are operably connected to each other such that they are able to provide tension on tissues connected to the assembly. In one embodiment the tensioning assembly further includes a mounting subassembly that provides a means to connect the tensioning assembly to a person's body. Methods of use of the surgical tensioning assembly are also disclosed to include novel methods of cycling and conditioning tissue used in a knee ligament replacement surgery.

The invention relates to the technical field of medical instruments, in particular to a bone tunnel preparation device for knee joint ligament reconstruction. The bone tunnel preparation device comprises a pilot drill bit, a reamer bit and a pull rope. A sliding groove is formed in the cutting section of the pilot drill bit. And the connecting section of the pilot drill bit is connected with a guide pipe for transmitting torque to the pilot drill bit. The pilot drill bit is hollow and connected with the interior of the guide pipe to form a channel for the pull rope to pass through. A connecting key matched with the sliding groove is arranged on the inner wall of the reamer bit. And a fixing device is arranged in the reamer bit. The free end of the pull rope and the fixing device form a locking structure. When the locking structure is in the first form, the free end of the pull rope is locked with the fixing device, and axial constraint is formed on the reamer bit; in the second form, the free end of the pull rope is separated from the fixing device. According to the device, reverse reaming of bone tunnel preparation is achieved, postoperative pain of a patient is relieved, and the knee joint function recovery effect is improved.

The invention discloses a method for establishing an individualized knee joint bionic ligament biomechanical model. The method comprises the following steps: acquiring three-dimensional image originaldata of an individualized knee joint; reconstructing an individualized knee joint digital model; establishing a knee joint coordinate system; calculating to obtain a mechanical relationship between ligament stress and a structure by utilizing the knee joint coordinate system; then, importing ligament material parameters into the individualized knee joint digital model in a variable parameter form; recording forward displacement of the tibia relative to the femur under a drawer test, fitting a result measured by the in-vivo knee joint drawer test with a simulation result of the individualizedknee joint digital model, and obtaining an optimal value of the individualized bionic ligament material parameter; and establishing an individualized knee joint bionic ligament mechanical model. The ligament stress conditions of the individualized knee joint in different motion states are known, different injury modes of the knee joint ligament in clinical research are simulated, and clinical guidance is provided for prevention, diagnosis, treatment and rehabilitation of individualized knee joint ligament injuries.

The invention discloses an auxiliary rehabilitation device suitable for traditional Chinese medicine knee joint ligament injury, and relates to the technical field of traditional Chinese medicine rehabilitation devices. Two ground contact supporting frames of a U-shaped structure are symmetrically welded to the bottom of the bed board, and two transverse supporting connecting rods are symmetrically welded between bottom supporting plates of the two ground contact supporting frames in the front-back direction. Two vertical supporting rail shafts are symmetrically welded between the rear half sections of the two ground contact supporting frame bottom supporting plates and the bed plate, and a double-leg positioning part is slidably arranged on the two vertical supporting rail shafts in a sleeving manner; two vertical support positioning shafts are symmetrically welded between the two transverse support connecting rods between the two grounding support frames and the bed board; a pillow block is mounted at the front end part of the bed plate in a sliding manner; two sliding grooves are symmetrically formed in the left side and the right side of the rear half part of the bed board in a penetrating mode. The knee joint rehabilitation device can be suitable for treatment of the knee joint in two states of flat spreading and bending arching, different treatment requirements are met, and the problems that a traditional device is single in application and poor in compatibility are solved.

The invention discloses a visual knee joint cruciate ligament reconstruction method which comprises the steps of data acquisition, coordinate system unification, cruciate ligament spatial coordinate extraction, visual cruciate ligament reconstruction based on images, image measurement and the like. The method is capable of realizing CT (Computed Tomography) and MRI (Magnetic Resonance Imaging) digital fusion, is simple and effective, and is capable of guiding knee join ligament surgery without increasing the burden of patients.

The invention provides a device for protecting ligaments in a knee joint of a user. The device includes a knee brace positionable about a knee joint of a user and a boot wearable on a foot of a user. Additionally, the device includes a flexible tether member including a first coupling element coupled to the knee brace and a second coupling element coupled to the boot. The boot and knee brace are attachable and detachable via the first and second coupling elements. The flexible tether member is adjustable in length to dispose the flexible tether member in tension at least in a portion of a maximum foot range of rotation, where the maximum foot range of rotation of the user's foot relative to the knee joint causes hyperextension of a knee ligament.

The invention relates to the field of orthopaedics medical appliance, especially an external functional knee joint fixing rack for early knee joint dirigation, which comprises locking pin structure composed of steel ball, C-formed tabular clamping steel ball rolling mechanism, C-formed tabular clamping steel ball slideway, U-formed head wedge steel ball support bar forming steel ball rolling slideway through vertically and horizontally matching, U-shaped rotating wheel comeandgo regulating and stabilizing mechanism, right locking pin mechanism, right adjustable arch form rack mechanism, eccentric shaft, left locking pin mechanism, and left adjustable arch form rack mechanism. The invention combines functional dissection of knee joint and biomechanics principle, is designed according to the traveling track of the unequal semidiameter center point of knee joint center of curvature, and has good stability and safety, good viability and flexibility for performing dirigation. The invention can be used for treating knee joint instability caused by ligamentous injury of knee joint, internal lateral ligament or ligamentum cruciatum anterius damage common in knee fracture, can effectively control crossrange activity of knee joint and promote ligament recovery.

The invention relates to the technical field of medical devices, in particular to a device for measuring front-and-back movement of a tibia. The device comprises an instrument frame, a tibia fixator and a patella fixator, wherein patella fixator height adjusting buttons are arranged at the upper ends of the two sides of the instrument frame, a connecting base is arranged on the upper side of the base surface of the instrument frame, a sliding groove is formed in the bottom of the instrument frame, a patella fixator sliding shaft penetrating through the connecting base is arranged in the sliding groove, the bottom of the patella fixator sliding shaft is provided with the patella fixator, and an electronic instrument panel is installed on the portion, on the lower side of the connecting base, of the base surface of the instrument frame. The whole device measures the front-and-back movement of the tibia of a patient with knee joint ligament injuries, an accurate result can be measured simply by requiring that the patient lies on the back, one operator can operate the device, and the device is convenient to use, simple in structure, high in measurement accuracy and relatively high in stability and practicability and has a certain popularization value.

The invention discloses a ligament thermal therapy rehabilitation device which comprises a rehabilitation device body. The rehabilitation device body is formed by welding an aluminum alloy flat plate,an arc-shaped plate and connecting plates at the two ends of the flat plate and the arc-shaped plate. A water storage cavity is formed in the rehabilitation device body. A lining layer is sprayed onthe surface of the water storage cavity. A concave stop opening is formed in the periphery of the flat plate. A protruding stop block is arranged on the periphery of the arc-shaped plate. A gluing layer is arranged between the concave stop opening and the protruding stop block. Staggered racks are arranged on the surface of the arc-shaped plate. The cross section of the rehabilitation device has the crescent-shaped appearance, people can conveniently put the knee pit part on the arc-shaped plate of a thermal therapy device when lying to make a knee joint ligament make contact with the arc surface so that people can have thermal therapy for a long time when having a rest or sleeping, the quite good treatment effect is achieved, and the problem that the general hot compress treatment adoptedfor people can hardly be resisted for a long time, so the effect is not remarkable is avoided.