The present invention discloses a bionic artificial interphalangeal joint. The bionic artificial interphalangeal joint includes three sets of proximal prostheses and distal prostheses matched with the proximal prostheses and respectively corresponding to the three joints from the metacarpal bone to the distal phalanx. According to the specific position of the joint to be replaced, the corresponding artificial interphalangeal joint can be selected for replacement. Among them, the bionic artificial interphalangeal joint that can be installed between the metacarpal bone and the proximal phalanx has multiple degrees of freedom, which allows the proximal phalanx to bent in any direction like a real finger, and the bending angle of the proximal phalanx can be up to about 90 degrees when the proximal phalanx is bent toward the inner side of the finger.

A flexible bone implant includes a proximal stem having a proximal end, a distal end, and a proximal conduit extending from the proximal end to the distal end of the proximal stem, whereby the proximal conduit is open at both the proximal and distal ends of the proximal stem. The implant includes a distal stem having a proximal end, a distal end, and a distal conduit extending from the proximal end to the distal end of the distal stem, whereby the distal conduit is open at both the proximal and distal ends of the distal stem. The implant includes a flexible hinge interconnecting the distal end of the proximal stem with the proximal end of the distal stem for allowing the proximal and distal stems to flex relative to one another. A proximal stem protective tube is disposed within the proximal conduit of the proximal stem and has a length that matches the length of the proximal conduit, and a distal stem protective tube is disposed within the distal conduit of the distal stem and has a length that matches the length of the distal conduit. The proximal stem, the distal stem and the flexible hinge comprise a unitary structure made of a polymer material.

The present invention relates to a device and system for surgical fixation of small bones, small bone fragments, and osteotomies and more particularly to compression screw having a threaded leading portion which is joined to a section that is free from threads, and which includes an angle or from 12° to 25° in a plane through the longitudinal axis of the screw and a portion which is joined to a head having a configuration that is intended to provide anti-rotational stability and compression through the device.

A prosthesis to replace a flexor tendon pulley. The prosthesis comprises a tendon holding member with a hollow cylindrical shape and a connecting plate attached to the tendon holding member. The tendon holding member is configured to receive and hold a tendon of the human hand. The connecting plate is configured to be attached to a phalange of the human hand. The tendon holding member comprises an outer layer on an outer surface of the tendon holding member and an inner layer on an inner surface of the tendon holding member. The outer layer comprises hydroxyapatite to secure the tendon holding member to the surrounding tissues. The inner layer comprises of hyaluronic acid to secure the tendon holding member to the surrounding tissues.

The present disclosure pertains to ionic polymer compositions, including semi- and fully interpenetrating polymer networks, methods of making such ionic polymer compositions, articles made from such ionic polymer compositions, and methods of making such articles and packaging for such articles.

An implant (30) for a mammalian bone joint (3) for spacing a first bone (2) of the joint from a second bone (1) of the joint while allowing translational movement of the second bone in relation to the first bone is described. The implant comprises (a) a distal part (31) configured for intramedullary engagement with an end of the second bone, (b) a proximal part (34) having a platform (15) configured for non-engaging abutment of an end of the first bone and translational movement thereon, and (c) an articulating coupling (10, 16) provided between the distal and proximal ends allowing controlled articulation of the first and second bones. The bone-abutting platform is shaped to conform to and translate upon the end of the first bone. A kit for assembly to form the implant of the invention, and the use of the implant to treat osteoarthritis in a bone joint, are also described.

Disclosed is a device for assisting in the placement of a trapeziometacarpal prosthesis including a cup to be fixed in the trapezium of a patient and a stem to be fixed in the patient's first metacarpal. The device includes a first guide to be interposed between the trapezium and the first metacarpal, the first guide including a first body having a first surface to be positioned on the articular surface of the trapezium, the first surface congruent with the articular surface of the trapezium and a second surface to face the articular surface of the first metacarpal before resection, the second surface preferably being congruent with the articular surface of the first metacarpal so as to be positionable on the articular surface of the first metacarpal. The first guide also includes locating members carried by the first body and arranged to define resection lines for the first metacarpal.

An implant that couples a first bone and a second bone includes a body that defines a first joint surface, a second joint surface, and a median plane. The first joint surface includes a first central region that articulates with the first bone. The second joint surface includes a second central region that articulates with the second bone, and the second central region is disposed on an opposite side of the median plane of the body relative to the first central region. The first and second central regions correspond to profiles of first and second axial segments, respectively, the first and second axial segments are each one of a cylinder, a cone, and a torus and are centered on first and second axes, respectively, and the first and second axes, as projected on the median plane, are substantially perpendicular to each other. The first joint surface further defines a first peripheral region adjacent the first central region and the first axial segment has a first cross section that has a smaller curvature in the first central region of the first joint surface than in the first peripheral region of the first joint surface.

The present disclosure provides a joint implant for replacing a finger joint. The joint implant includes a first component, wherein the first component includes a first joint section and a first anchoring section, the first joint section including a concave joint surface about a first axis and the first anchoring section extending transverse to the first axis. The joint implant also includes a second component, wherein the second component includes a second joint section and a second anchoring section, the second joint section including a circumferential surface about a second axis and the second anchoring section extending transverse to the second axis, wherein the circumferential surface includes a convex joint surface that is configured to act as a hinge joint with the concave joint surface of the first joint section.

A device for the repair of a phalangeal joint comprises a first anchor, a second anchor, and a flexible spacer connecting the first and second anchors. The flexible spacer comprises a plurality of elongate fibers extending axially or criss-crossed between the first and second anchors and a polymeric matrix interspersed with the plurality of elongate fibers. Specifically, a prosthetic metatarsophalangeal joint device comprises a porous metallic metatarsal bone anchor, a porous metallic phalangeal bone anchor, and a polymeric spacer element comprising parallel or criss-crossed elongate fibers that can connect the metatarsal bone anchor and the phalangeal bone anchor. Methods for manufacturing prosthetic joint devices comprise using three-dimensional printing processes or molding processes. Methods for implanting prosthetic joint devices comprise positioning porous metallic anchor components adjacent resected bones at planar interfaces and between which a polymeric spacer having axial aligned elongate fibers embedded in a matrix can be disposed.