123 results about "Metatarsal joint" patented technology

Examples in the present disclosure relate to hand chirality estimation. Tracking data captured by one or more sensors associated with an extended reality (XR) device is processed to determine positions of a plurality of joints of a hand of a person. A reference vector is generated based on a first subset of the positions. The first subset of the positions includes positions of at least two metacarpophalangeal joints. A plurality of bending angles is determined based on at least a second subset of the positions. Each bending angle represents an angle between a respective pair of articulating bones that is measured in relation to the reference vector. An estimated chirality of the hand is identified based on the plurality of bending angles. Operation of the XR device is controlled using the estimated chirality of the hand.

A bone displacement system includes an anchoring portion, a tool engaging portion, a compression distraction mechanism, a lateral body and a distal body. The anchoring portion has an aperture for receiving a wire to connect the anchoring portion to a proximal bone. The anchoring portion is connectable to a downwardly depending member for holding a tissue portion. The tool engaging portion is connected to the anchoring portion and is configured to connect a tool thereto. The compression-distraction mechanism is connected to the anchoring portion. The lateral body is connected to the compression-distraction mechanism and engageable with a lateral bone. The distal body is connected to the compression-distraction mechanism. The distal body has an aperture for receiving a wire to connect the distal body to a distal bone. The compression-distraction mechanism is configured to move the anchoring portion relative to the distal body.

A variety of surgical procedures may be performed on the bones of the foot, such as on one or more lesser metatarsals of the foot positioned laterally of the first metatarsal. For example, a surgical procedure may involve cutting an end of one or both of a second metatarsal and an intermediate cuneiform and / or cutting an end of one or both of a third metatarsal and a lateral cuneiform. The tarsometatarsal joints defined be one or both sets of bones may be cut to treat an arthritic joint, metatarsus adductus, and / or other clinical condition. In any case, various surgical instruments can be utilized during a procedure to help increase the accuracy and repeatability of the procedure patient-to-patient, improving overall patient outcomes. For example, one or more cut guides, compressor-distractor devices, and / or other instruments designed to accommodate the specific anatomical conditions of the procedure being performed may be utilized during procedure.

To provide an insole and footwear that can be used safely for a long period of time by both the elderly and young people, and that can prevent hallux valgus and flat feet and inhibit the progression of the symptoms. [Solution] The problem was solved by an insole comprising a medial arch support slope, an lateral arch support slope that supports the lateral arch, a central arch elevator that elastically presses and supports from the plantar side the flexor digitorum brevis, plantar aponeurosis, and the flexor digitorum brevis that cover the plantar sides of the third and fourth metatarsals, from near the posterior side of the MTP joint to near the Chopart joint, a phalangeal elevator that is formed by a mountain-like section that forms a gentle downward slope and protrudes downward from the back surface or upward from the surface, a flat surface provided between the central arch elevator and the phalangeal elevator, and a heel cup.

A bone correction system is configured to attach to the medial cuneiform and the first metatarsal of a patient's foot in a deformed configuration. An articulation joint is configured to rotate and angulate the first metatarsal with respect to the medial cuneiform. A translation assembly is configured to cause the first metatarsal to travel toward and / or against the medial cuneiform. Thus, the bone correction system is configured to iterate the patient's foot from the deformed configuration to a corrected configuration. A bone plate can permanently fix the medial cuneiform and the first metatarsal in the corrected configuration.

The invention belongs to the field of robots, and particularly relates to a three-degree-of-freedom rigid-flexible coupling dexterous finger and a dexterous hand, and the dexterous finger comprises a finger knuckle module, a double-end spherical hinge connecting rod, a palm inner finger driving module, a driving transmission mechanism and an arm inner finger driving module. By fusing a rigid space connecting rod mechanism and a flexible driving transmission mechanism, the contradiction that a traditional rigid structure lacks flexibility and a flexible structure is insufficient in rigidity is ingeniously solved. Two degrees of freedom of flexion and extension and adduction and abduction of fingers at metacarpophalangeal joints are realized by utilizing a spatial connecting rod mechanism formed by a knuckle supporting frame, a proximal phalanx, a deflection transverse shaft and a double-end spherical hinge connecting rod; meanwhile, the power of the finger driving module in the arm is efficiently transmitted to the interphalangeal joints through the driving transmission mechanism, the middle joint and the distal phalanx are driven to achieve coupling or self-adaptive buckling, and therefore the third degree of freedom is obtained, and the problem that the contradiction exists between insufficient flexibility of a traditional rigid structure and insufficient rigidity of a flexible structure is solved.

The invention discloses a pair of children's shoes and a preparation method thereof, and relates to the field of children's shoes, each of the children's shoes comprises an upper, a sole, a toe cap protection structure and a detachable orthotic insole, the upper is formed by sewing a breathable antibacterial composite fabric; scientific foot protection is achieved through multi-dimensional structure optimization, the 1 / 3 bending structure of the shoe sole accurately corresponds to the first-fifth metatarsophalangeal joint position of the foot, the 15-degree upwarp design and the 3-5 mm sunken structure accord with the foot movement track of a child during walking, running and jumping, the space in the shoe is increased, joint stress damage is reduced, the correction shoe pad is provided with supporting pads aiming at the transverse arch of the forefoot and the longitudinal arch of the inner side and the longitudinal arch of the outer side respectively, and therefore the correction effect is achieved. By the aid of pressure sinking convex-concave grooves in metatarsophalangeal joints and toe joints, plantar pressure can be dispersed, a normal physiological curve of an arch can be maintained, foot development deformity such as flatfoot, strephenopodia or valgus can be effectively prevented, and meanwhile, the surrounding heel cup with the height of 12 mm and the inner side heel cup cooperatively fix the heel to guarantee that the foot keeps a correct force line during movement.

A device for exercising / strengthening feet includes a left pad for supporting and exercising a left foot and a right pad for supporting and exercising a right foot, each pad comprising a rear portion to support the hindfoot thereon and a front portion to support the midfoot and the forefoot thereon, the front portion comprising a hallux portion to support the hallux. A notch is positioned adjacent to the hallux portion and underneath the first metatarsophalangeal (MTP) joint of the foot. The hallux portion and the notch are configured such that at least a portion of the first MTP joint is unsupported by the front portion to reduce a pressure experienced by the first MTP joint when the hindfoot is supported on the heel portion and to provide increased plantarflexion of the first metatarsal bone of the foot when the hindfoot is raised and unsupported by the rear portion.

The utility model discloses a mechanical finger with a T-shaped shaft joint structure, which comprises a T-shaped shaft component, the T-shaped shaft component comprises a joint part and a shaft part, and a metacarpal bone unit and a finger unit are respectively hinged to two ends of the shaft part and the joint part; one end of the first rotary kinematic pair is connected to the finger unit, and the other end is movably connected to the distal end of the metacarpal bone unit; one end of the second rotary kinematic pair is connected to the finger unit, and the other end is movably connected to the near end of the metacarpal bone unit; when the rotating directions of the first rotating motion pair and the second rotating motion pair are opposite, the finger unit performs side-sway motion along the joint part relative to the metacarpal bone unit; and when the rotating directions of the first rotating motion pair and the second rotating motion pair are the same, the finger unit performs bending motion along the shaft part relative to the metacarpal bone unit. A parallel and stable double-supporting frame is formed, the torsion resistance and lateral load resistance of the joint in the side-sway and bending state are enhanced, and high-rigidity and high-precision double-degree-of-freedom movement in a compact space is achieved.

A method of preparing a metatarsophalangeal joint for fusion may involve surgically accessing the metatarsophalangeal joint and separating the metatarsal from the opposed proximal phalanx at the joint. The technique may involve preparing an end of the metatarsal and preparing an end of the opposed proximal phalanx for fusion. With or without the aid of a bone positioner, the metatarsal may be moved in one or more planes, such as the frontal and transverse planes. The proximal phalanx may also be moved in one or more planes, for example relative to the moved metatarsal. Subsequently, a bone fixation device can be applied across or through the metatarsophalangeal joint separating the metatarsal from the opposed proximal phalanx.

The invention discloses a tendon-rope-driven dexterous hand finger for metacarpophalangeal joint movement decoupling. A flexion and extension rotating joint and a side-sway rotating joint of the tendon-rope-driven dexterous hand finger are both of a bidirectional rotating structure controlled by a rope driver; the side-sway rotating joint is of a rolling meshing structure formed by two toothed plate components, rope guide wheels are arranged on the two toothed plate components, the two rope guide wheels are used for guiding and outputting a flexion and extension driving rope of the flexion and extension rotating joint and a side-sway driving rope of the side-sway rotating joint, and the winding directions of the flexion and extension driving rope on the two rope guide wheels are opposite. The two free ends of the side-sway driving rope are guided by the rope guide wheels to be arranged in a staggered mode. After the scheme is adopted, a transmission link capable of realizing side-sway motion and flexion-extension motion is decoupled, so that the effective length change of the flexion-extension driving rope caused by the side-sway motion is completely compensated geometrically, and the effective length of the flexion-extension link is kept constant at any side-sway angle; and the action stability and the repeated positioning performance of the fingers of the dexterous hand under the multi-posture and multi-load conditions are improved.

The application provides an underactuated bionic dexterous hand, a system and a control method thereof. The underactuated bionic dexterous hand comprises a palm, five fingers, a control plate and a steering engine installed on the back of the palm through a threaded hole. The thumb comprises a joint, a tendon rope for driving the bending of the finger, a metacarpal bone, a proximal phalanx and a distal phalanx connected through a cylindrical pin in sequence. The index finger, the middle finger, the ring finger and the little finger have the same structure and each comprises a joint, a tendon rope for driving the bending of the finger, a distal phalanx, a middle phalanx and a proximal phalanx connected through a cylindrical pin in sequence. A finger root stroke limiter is arranged at the metacarpophalangeal joint of the thumb and the palm, and the metacarpophalangeal joint of the index finger, the middle finger, the ring finger and the little finger and the palm, the middle phalanx and the distal phalanx are each provided with a finger root stroke limiter. The application has high human simulation degree, is light and flexible, and solves the technical problems of the overlarge size, the overly complex structure, the rigid motion and the low human simulation degree of the dexterous hand.

According to the technical scheme, the ankle joint prosthesis comprises a tibia component, a gasket and a talus component. The tibia component is located on the outermost side and composed of a base, a supporting plate and a central screw. A hollow ball socket with sawteeth is arranged at the lower part of the base; the supporting plate is a solid hemisphere, sawteeth meshed with the sawteeth on the base are arranged on the surface of the supporting plate, angle adjustment can be achieved, and the supporting plate and the base are fixed through a central screw. The gasket is a cylinder, the upper portion of the gasket is connected with the supporting plate through a protrusion, the protrusion is provided with a recess matched with the central screw, grooves and micropores are formed in the surface of the protrusion, and the bottom of the protrusion is an arc-shaped recess used for being connected with the talus component. The gasket is further fixed to the supporting plate through the connecting rod, and stable joint connection and angle adjustment can be achieved through the overall structure.

A method for treating an articular fracture of a tibia using a tibia plate with an extension arm, including: making an incision to expose the tibia; reducing the articular fracture of the tibia; contouring the tibia plate to fit the tibia; preliminarily fixing the tibia plate to the tibia; placing a screw partially into the tibia through a lateral elongated hole in the tibia plate; applying compression between a plate screw hole in the extension arm and an anterior surface of the tibia; and placing additional plate screws in the tibia through additional screw holes in the tibia plate.

A bone correction system is configured to attach to the medial cuneiform and the first metatarsal of a patient's foot in a deformed configuration. An articulation joint (156) is configured to rotate and angulate the first metatarsal with respect to the medial cuneiform. A translation assembly (158) is configured to cause the first metatarsal to travel toward and / or against the medial cuneiform, parallel to the axis (155) of a shaft (152). Thus, the bone correction system is configured to iterate the patient's foot from the deformed configuration to a corrected configuration. A bone plate can permanently fix the medial cuneiform and the first metatarsal in the corrected configuration.

Osteotomy cutting systems and surgical methods are provided herein. One surgical method includes coupling, to a cuneiform of a subject, a surgical apparatus for use in facilitating correction of a bunion and coupling the surgical apparatus to another bone of the subject. Another surgical method includes coupling a surgical apparatus to a cuneiform and metatarsal of a subject, coupling a cutting block for alignment at a joint between the cuneiform and the metatarsal, and performing a surgical procedure utilizing the surgical apparatus and the cutting block to correct a bunion. A further surgical method includes providing a surgical apparatus for use in facilitating correction of a bunion in a subject in which the surgical apparatus is configured to couple to a cuneiform and a metatarsal of the subject and performing a surgical procedure utilizing the surgical apparatus while the surgical apparatus is coupled to the cuneiform and the metatarsal.

Apparatus and methods are disclosed for correcting deformities in a patient's foot. In one example, a metatarsus adductus is addressed using a pin placement guide that is angulated to be placed in alignment with a cuneiform and a metatarsal, such that the TMT joint can be subsequently cut, and the metatarsal moved into proper alignment. Th pin placement guide can be a variable angle guide, or a kit of fixed-angle pin placement guides can be provided.

The utility model discloses a pair of orthopedic insoles and aims to overcome the defects that the conventional orthopedic insoles are difficult to add and delete and are difficult to adapt to foot characteristics of patients. The insole comprises an insole body and flexible additional materials, additional material holes are formed in the insole body, the flexible additional materials are filled in the additional material holes, the additional material holes are formed in one or more positions, corresponding to metatarsophalangeal joints, arches and heels, of the insole, and the additional material holes and the flexible additional materials are correspondingly arranged according to the foot shape of an orthopedic object. The flexible additive is made of silica gel, and the hardness range of the silica gel is 0-40 degrees. The mode that the additional material holes are matched with the silica gel to serve as flexible additional materials is adopted, so that medical staff can easily customize the orthopedic insole according to the foot shape of a patient.

A variety of surgical procedures may be performed on the bones of the foot, such as on one or more lesser metatarsals of the foot positioned laterally of the first metatarsal. For example, a surgical procedure may involve cutting an end of one or both of a second metatarsal and an intermediate cuneiform and / or cutting an end of one or both of a third metatarsal and a lateral cuneiform. The tarsometatarsal joints defined be one or both sets of bones may be cut to treat an arthritic joint, metatarsus adductus, and / or other clinical condition. In any case, various surgical instruments can be utilized during a procedure to help increase the accuracy and repeatability of the procedure patient-to-patient, improving overall patient outcomes. For example, one or more cut guides, compressor-distractor devices, and / or other instruments designed to accommodate the specific anatomical conditions of the procedure being performed may be utilized during procedure.

The application belongs to the technical field of robots, and discloses a motion decoupling double-path rope-driven bionic thumb device, which comprises a distal phalanx, a proximal phalanx, a metacarpal bone, a thumb base, IP joints, MCP joints and CMC joints for connecting the phalanges; the distal phalanx, the proximal phalanx, the metacarpal bone and the thumb base are connected through tendon rope transmission. The rope path for driving the IP joint does not pass through the MCP joint, and the part of the rope path across the MCP joint is wrapped by a Bowden tube assembly, so that the length of the rope path remains constant when the MCP joint moves, and the motion decoupling of the MCP joint and the IP joint is realized; the rope path for driving the MCP joint is also wrapped by a Bowden tube assembly outside, so that the length of the rope path remains constant when the CMC joint moves, and the motion decoupling of the MCP joint and the CMC joint is realized. The application has the advantages of compact structure, joint motion decoupling, precise force control, strong bearing capacity and the like.

The application provides a kind of inner bag shoe sole combined shoes, wherein the shoes include inner shoes (1) and outer shoes (2), the outer shoes (2) can be set in the outer shoes (1), the outer shoes (2) include foot palm fixing part (21), instep fixing part (22), heel fixing part (23) and shoe sole (24), foot palm fixing part (21) is fixedly arranged at the toe and metatarsophalangeal joint part of shoe sole (24), and is bent and extends to the front side of toe and both sides of metatarsophalangeal joint from the instep; heel fixing part (23) is fixedly arranged at the heel part of shoe sole (24), and extends upward and to the toe direction respectively from the heel; instep fixing part (22) is fixedly arranged on shoe sole (24) at lumbar fossa position and connected with heel fixing part (23). The shoes of the application are simple in structure, comfortable to wear, and the inner shoes and outer shoes are quickly and simply disassembled and combined.

To provide a sole that can be worn and used for training the toes by walking. [Solution] The sole (10) of the present invention comprises a sole body (11) and a protruding portion (12) integrally formed on the back surface of the sole body (11). The sole body (11) and the protruding portion (12) are formed of a material having high resilience and flexibility. The protruding portion (12) extends continuously or intermittently in the width direction in a region corresponding to the vicinity of the interphalangeal joint (IP) of the first toe (T1) of the wearer's foot and the vicinity of the proximal interphalangeal joints (PIP) of the second toe (T2) through the fifth toe (T5) of the wearer's foot up to the base (TB) of the wearer's toes. When the sole body (11) is not being worn, spaces A1 and A2 are defined between the back surface of the sole body (11) and the ground (G) in the region from the front end (121) of the protruding portion (12) to the front end (111) of the sole body (11) and the region from the rear end (122) of the protruding portion (12) to positions corresponding to the rear ends of the ball of the big toe (TE) and the ball of the little toe (HE) of the wearer's foot.

A finger joint reduction simulation training device includes forearm, carpal, metacarpal, proximal phalanx, and middle phalanx portions, and at least one biasing element. The carpal portion is attached to a distal end of the forearm portion. The metacarpal portion is connected to the carpal attachment. The proximal phalanx portion has a proximal end that is connected to the metacarpal portion and a distal end opposite to the proximal end. The distal end includes a dislocation guide surface with a depression formed therein. The middle phalanx portion is positioned adjacent the proximal phalanx portion and includes a proximal end with a terminal surface configured to shift relative to the dislocation guide surface and includes a projection configured to extend into the depression of the dislocation guide surface. The biasing element is configured to bias the terminal surface of the middle phalanx portion against the dislocation guide surface.

To provide an artificial joint capable of adjusting the size of a hinge to the size of the resected surface of each bone.SOLUTION: An artificial joint 1A is applied to a proximal interphalangeal joint. The artificial joint 1A integrally has: a proximal stem 10 inserted into a hole 521 in the proximal phalanx 52 located on the proximal side of the joint; a distal stem 20 inserted into a hole 531 in a middle phalanx 53 located on the distal side of the joint; and a hinge 30 pivotally connecting the proximal stem 10 and the distal stem 20. The hinge 30 includes: a proximal wall 31 facing the distal end 52E of the proximal phalanx 52; a distal wall 32 facing a proximal end 53E of the middle phalanx 53; and a connecting portion 33 connecting the proximal wall 31 and the distal wall 32. The maximum width of the proximal wall 31 in the left-right direction is smaller than the maximum width of the distal wall 32 in the left-right direction.SELECTED DRAWING: Figure 2

The utility model discloses a dexterous hand finger mechanism which comprises a far knuckle, a first joint, a middle knuckle, a second joint, a near knuckle, a third joint and a metacarpophalangeal joint. The device further comprises a first driving rope, a second driving rope, a first reset elastic rope and a second reset elastic rope. One end of the first driving rope is externally connected with a driving mechanism, and the other end of the first driving rope penetrates through the metacarpophalangeal joint, the near knuckle and the middle knuckle and is sequentially wound and connected with the third joint, the second joint and the first joint; one end of the second driving rope is externally connected with a driving mechanism; the other end of the connecting rod penetrates through the metacarpophalangeal joint and is wound and connected with the third joint; the two ends of the first reset elastic rope are connected with the far knuckles and the near knuckles correspondingly. The two ends of the second reset elastic rope are connected with the metacarpophalangeal joints and the proximal knuckles respectively. Bending of different joints of the fingers is achieved through the first driving rope and the second driving rope, and reset and overload protection are achieved in combination with the design of the reset elastic rope.

This invention discloses a teaching device for manual reduction of temporomandibular joint dislocation, comprising a base plate on which a lifting and adjusting assembly is mounted. A skull model is mounted on top of the lifting and adjusting assembly. The skull model has a temporalis muscle spring assembly between the temporal bone and coronoid process, a masseter muscle spring assembly between the zygomatic arch and the lateral surface of the lower border of the mandibular angle, a medial pterygoid muscle spring assembly between the posteromedial aspect of the maxillary tuberosity and the medial surface of the lower border of the mandibular angle, and a lateral pterygoid muscle spring assembly between the articular pterygoid fossa and the lateral pterygoid plate at the condylar neck. In this invention, the skull model can rotate on top of the lifting and adjusting assembly, allowing the device to visually display the temporomandibular joint and the mandibular elevating muscles closely related to joint dislocation, simulating the movement of muscles inside the oral cavity, thus realistically simulating the force resistance against the mandibular elevating muscles during temporomandibular joint reduction. Furthermore, the device allows for angle adjustment to accommodate students in different positions.

The application provides a motion analysis method and system based on image and foot bottom contact modeling, comprising the following steps: reconstructing the three-dimensional posture of the subject motion according to the identified 2D key points, and generating a personalized skeletal model matched with the subject according to the height data of the subject; obtaining the foot bottom image of the subject, and automatically generating a plurality of contact spheres in the foot bottom area according to the extracted foot bottom contour shape to approximately represent each area of the foot bottom contact with the ground, the positions and radii of the contact spheres are optimized and set according to the foot type of the subject, and a personalized foot bottom contact model is formed; solving the ground reaction force (GRF) consistent with the dynamics under the given kinematic conditions according to the personalized skeletal model, joint motion data and personalized foot bottom contact model; determining the moving path of the force point of action of the resultant force with time according to the force condition of each contact sphere of the double feet, and calculating the trajectory of the foot bottom pressure center (COP). The application can perform motion analysis based on image and foot bottom contact modeling.

Bone and joint surface reconstruction methods are disclosed for the therapeutic amelioration of joint defects caused 2024 / 064830 by various conditions, injuries, and diseases to help eliminate or reduce pain and return the joint to its proper bio-mechanical function without the need to replace fully or partially the anatomical joint. The joint may specifically include mammalian joints such as the metatarsal phalangeal joint or other joint of the foot or ankle, for example. The methods disclosed herein leverage the significant role the subchondral bone plays in the health status of the afflicted joint.WO

A system and method for a ROSE-Reverdin / DARE osteotomy obviates severe deformities having a high intermetatarsal angle and which require closure via osteotomy (bone cut) of the first and / or fifth metatarsal in the midshaft or proximal aspect of the bone. The ROSE osteotomy is utilized to achieve this correction and is performed without need for fusion of the first metatarsal cuneiform joint. The ROSE osteotomy achieves correction of the intermetatarsal angle via rotation of the first and / or fifth metatarsal about a proximal based axis point. The Reverdin / DARE osteotomy is required to correct a deviated articular cartilage deformity at the head of the first metatarsal and / or additional slight correction of the IM angle. The Reverdin / DARE osteotomy achieves correction by wedging of the cut to realign the cartilage and translation of the head of the first metatarsal for further IM correction. A unique jig is used to achieve this cut and fixation.

A system for metatarsal phalangeal joint fusion includes a hinged guide; a trajectory guide attachable to the hinged guide; and an anchoring wire to attach the hinged guide to a bone.