7 results about "Subtalar joint" patented technology

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 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 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.

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.