14 results about "Subtalar joint" patented technology

An implant system that includes an implant having a base portion, that has a body and at least a portion of which includes a lattice structure, and an upper portion configured to releasably couple with the base portion. The implant system includes at least one first fastener configured to be received and extend at least partially through at least one bore of the base portion, and at least one second fastener configured to be received within a cavity of the base portion. Also disclosed is an implant that includes a body that has various elements configured to facilitate arthrodesis of the subtalar joint and talonavicular joint. The body includes an upper surface that is configured to interface with the tibia of a patient, and a lower surface that is configured to interface with the subtalar joint and / or calcaneus of the patient.

The pressure sensor can directly contact the foot, which can easily cause pain. [Solution] When the subtalar joint, navicular bone, and medial cuneiform bone area move, the membrane 37 is pushed inward into the main body 35, and the air inside the main body 35 moves to the relief section 34 via the hose 32. The air flow rate at this time is acquired by the flow sensor 33. The output signal of the flow sensor 33 is transmitted from the sensor board 4 to the computer 5. The pronation measurement unit 3 acquires from the output signal of the flow sensor 33 where and to what extent pronation movement is occurring. The judgment unit 52 calculates and outputs the pronation movement and the COP of the foot based on these measurement results. The measurement results are generated in real time. The subject refers to these measurement results and performs correction through effort walking.

A rearfoot support device is provided that extends upwards on both medial and lateral sides of the heel in order to stabilize the subtalar joint in a neutral position and reduce medial longitudinal arch collapse. The device supports the subtalar joint by cradling the heel on the medial and lateral sides to prevent the subtalar joint from deviating excessively from the neutral position. Unlike conventional orthotic support devices, the rearfoot support device includes a clamp closure system to accommodate different foot widths, which securely clamp the device to the rearfoot of a user and support the subtalar joint without the need for fasteners or wrapping around the midfoot or dorsum of the foot. The device fits securely to the heel and rearfoot, and can be worn barefoot, with backless footwear or with enclosed footwear to provide improved subtalar joint motion control.

The application discloses a rigid-flexible coupling ankle joint rehabilitation robot, which comprises a fixed platform, a movable platform, a first supporting chain, a second supporting chain and a third supporting chain; the three supporting chains are connected with the fixed platform and the movable platform, the first supporting chain and the second supporting chain are the same in structure and symmetrically distributed on the two sides of the third supporting chain; each supporting chain comprises a rigid-flexible coupling module, the rigid-flexible coupling module comprises four connecting rods and a torsional spring; the four connecting rods are rotationally connected in sequence to form a parallelogram, and a torsional spring is arranged at the connecting position of adjacent two connecting rods; the driving motors of the three supporting chains control the posture of the movable platform, realize the dorsiflexion / planter flexion, the inversion / eversion and the internal / external rotation of the ankle joint, the rigid-flexible coupling modules of the three supporting chains adjust the position of a movable ball center through the torsional spring, the movable ball center moves on a spherical surface with the length of a talus as a radius, the position of a subtalar joint of a human body is fitted, the motion coupling between a tibiotalar joint and the subtalar joint is realized, the robot can conform to different rehabilitation trajectories of different patients, the ankle joint rehabilitation efficiency is improved, and secondary injury is reduced.

The subtalar joint prosthesis comprises a talus assembly, a gasket and a calcaneus assembly, and the talus assembly and the calcaneus assembly are connected through the gasket to form a joint structure; by means of the split structure of the talus assembly, the gasket and the calcaneus assembly, all the assemblies are detachably clamped, step-by-step implantation and assembly in the operation process are facilitated, and therefore the adaptability of the prosthesis under different anatomical conditions is improved. The gasket is arranged between the talus assembly and the calcaneus assembly, a relative motion interface is formed between the talus assembly and the calcaneus assembly, the gasket is made of the low-friction material, direct friction between metal assemblies can be effectively reduced, abrasion is reduced, and the joint movement performance is improved. By means of the structural design, dependence of prosthesis implantation on accurate matching of bone surfaces is reduced, surgical operation is simplified, and meanwhile a feasible solution is provided for rebuilding after joint fusion operation.

The utility model provides a subtalar joint fixing device, and belongs to the technical field of medical instruments. The subtalar joint fixing device comprises a foot support, and the foot support is arranged on the heel portion of a wearer in a sleeving mode. The foot support comprises a bottom plate, a first side plate and a second side plate, the first side plate and the second side plate are arranged at the top ends of the two sides of the bottom plate, the first side plate and the second side plate are oppositely bent inwards, and the top ends of the first side plate and the second side plate are sunken towards the bottom plate to form grooves. The first side plate and the second side plate are attached to the ankle of a wearer. The subtalar joint fixing device is simple in structure, good in adaptability and high in safety, the front foot activity space can be fully opened, the wearing discomfort is reduced, and a user can exercise by himself to remodel muscle ligaments and exert force during walking.

The present invention is a reconfigurable ankle joint rehabilitation parallel mechanism, comprising a static platform, a dynamic platform, a 3R branch chain, and three metamorphic branches; the rear ends of the static platform and the dynamic platform are connected by the 3R branch chain, so that the mechanism has a fixed spherical center and a dynamic spherical center, the dynamic spherical center rotates spherically around the fixed spherical center, and the dynamic platform rotates spherically around the dynamic spherical center, and the distance between the two spherical centers is equal to the center distance between the tibiotalar joint and the subtalar joint of the ankle joint; the three metamorphic branches respectively connect the left and right sides and the front end of the static platform and the dynamic platform, and the No. 1 connecting rod of the metamorphic branch serves as an active component, enabling the metamorphic branch to realize the transformation from S pair to U pair and R pair, so that the mechanism has different motion modes. In each mode, each metamorphic branch is an SPU branch chain or a UPU branch chain. The metamorphic branch chain can realize the switching from S pair to U pair to adjust the position and posture of the dynamic platform, so that the mechanism has multiple motion modes to meet the training needs of different ankle injury types and different rehabilitation stages.

The application discloses an angle-adjustable guiding reset device for tibiofibular syndesmosis, which comprises an adjusting mechanism, a first guiding reset mechanism, a second guiding reset mechanism and a positioning mechanism; the two guiding reset mechanisms are symmetrically arranged on the two sides of tibia and fibula and are connected through the adjusting mechanism; the positioning mechanism comprises a positioning plate and a positioning rod, the positioning plate is attached to the posterolateral surface of the fibula, and the positioning plate is connected with the adjusting mechanism through the positioning rod; the adjusting mechanism adjusts the position and axial direction of the two guiding reset mechanisms clamping the tibia and the fibula with the positioning plate as the reference. The posterolateral surface of the fibula is used as the reference datum of the guiding reset device to accurately correspond the axial direction of the guiding reset mechanism in the three-dimensional space to the reset axis planned in the CT image, so that the reset effect of the tibia and the fibula is closer to the ideal reset state. Especially, the reset mode of the two guiding reset mechanisms clamping the two bones in opposite directions can further enhance the stability in the reset process and reduce the risk of bone damage.

This application provides a dual-platform parallel mechanism for ankle joint rehabilitation equipment. Through a layered design of a primary and secondary moving platform, three concyclic arc-shaped guide rail pairs are designed on the primary moving platform. A revolute joint is set at the top of the first branch of the secondary moving platform, with the rotation axis of the revolute joint at the top of the first branch designed to be perpendicular to the arc-shaped rail axis. The intersection point N of the two axes simulates the subtalar joint rotation center of the ankle joint; the intersection point M of the q-axis extension of the universal joint in the primary branch and the arc-shaped rail axis simulates the distal tibiofibular joint rotation center of the ankle joint. The two motion centers of this dual-platform parallel mechanism can match the anatomical structure of the two motion centers of the human ankle joint, ensuring that the parallel mechanism can simulate the movements of the tibiofibular joint and the subtalar joint and conforms to the natural movement trajectory of the human body.

A surgical implant for use in subtalar joint motion limitation and having a semi-pliable body and a generally L- or J-shaped plate attached thereto. The plate may be in one or two pieces. A bar is formed on the end of the plate distal the semi-pliable body. A plurality of bores extend through the plate and bar to allow for the attachment of the implant to a subtalar joint bone.

The present invention discloses a parallel mechanism steel-flexible coupled ankle joint rehabilitation robot, which includes a fixed platform and a flexible quadrilateral module. The flexible quadrilateral module is hinged to the fixed platform, and a ball pair is provided at one end of the flexible quadrilateral module away from the fixed platform. The flexible quadrilateral module is connected to a moving platform via the ball pair. The fixed platform is clamped on the patient's calf, and the moving platform contacts the foot. The moving platform moves in a directional manner to perform rehabilitation exercises on the ankle joint. A motor is provided on the fixed platform, and the motor drives the moving platform to vibrate to massage the patient's foot. The parallel mechanism steel-flexible coupled ankle joint rehabilitation robot provided by the present invention can not only realize dorsiflexion / taloes flexion, inversion / external rotation, and internal / external rotation of the ankle joint, but can also fit the coupling movement between the supratalar joint and the subtalar joint, so that the rehabilitation robot can adapt to the rehabilitation trajectory of different patients. At the same time, the moving platform has the ability to self-deform, which can realize massage movements for the patient's foot.

An ankle arthrodesis implant can include an elongate shaft sized and shaped to be implanted in an intramedullary canal of a tibia of a patient; a first angled opening through the shaft, the first angled opening defining a first axis that extends through the tibia and into a talus bone of the patient across a tibio-talar joint when the elongate shaft is implanted; a first elongate slot through the shaft, the first elongate slot defining a second axis that extends into the patient's talus when the elongate shaft is implanted, the first elongate slot being configured to allow a first fixation member to translate axially relative to the shaft within the first slot from a first position to a second different position to compress a tibio-talar joint, wherein the second axis is perpendicular to a sagittal plane of the ankle; a second elongate slot through the shaft, the second elongate slot defining a third axis that extends into a patient's calcaneus when the elongate shaft is implanted, the second elongate slot being configured to allow a second fixation member to translate axially relative to the shaft within the second slot from a first position to a second different position to compress a subtalar joint; a second angled opening through the shaft, the second angled opening defining a fourth axis that extends through the calcaneus and into a talus bone of the patient across the subtalar joint when the elongate shaft is implanted; and a third angled opening through the shaft, the third angled opening defining a fifth axis that extends into a calcaneus bone of the patient when the elongate shaft is implanted.

The invention relates to a talus prosthesis with a flexible articular surface buffer layer and a preparation method of the talus prosthesis, belongs to the technical field of artificial prostheses, and solves the problem of cartilage degeneration caused by neglecting cartilage layer space deficiency and direct contact of a hard material with adjacent cartilages in the existing full talus prosthesis. The preparation method comprises the following steps: reconstructing a talus prosthesis model based on uninjured side talus CT (Computed Tomography) data of a patient; macroscopic mechanical interlocking structures are generated on the edges of the contact areas of the talonavicular joint, the tibia joint and the subtalar joint respectively; performing 3D printing on the talus prosthesis model to obtain a hard substrate; injection molds corresponding to the contact areas are manufactured through 3D printing; a flexible buffer material is injected into a cavity of the injection mold, and a flexible buffer layer of an integrated structure with the hard substrate is formed after cooling and curing; the talus prosthesis with the flexible articular surface buffer layer is obtained. According to the invention, cartilage deletion space can be compensated, the risk of surgical injury is reduced, the flexible buffer layer can protect adjacent cartilages, the risk of degeneration is reduced, and the long-term prognosis effect is ensured.