In one embodiment, the present invention is a fixation device including a median zone having a substantially triangular shape; a first fixation zone including first and second tabs that, in a separated configuration, extend away from each other from an end of the median zone, the first fixation zone having a first region adjacent the median zone and a second region adjacent the first region. Also, within the first region of the first fixation zone, an inner surface of each of the first and second tabs of the first fixation zone extends outwardly and proximally from the median zone to a first point to form an arch, and from the first point, the inner surface of each of the first and second tabs extends toward a second point. Further, within the second region of the first fixation zone, the inner surface of each of the first and second tabs of the first fixation zone extends outwardly from each second point to a respective third point so that the inner surface of each of the first and second tabs from the second point to the third point is arcuate and convex.

An interphalangeal prosthesis (10) includes a mobile element (12), a proximal fixation element (22), and a distal fixation element (24). The mobile element (12) includes a proximal portion (42, 62, 94) and a distal portion (43, 64, 92), and the proximal portion includes three proximal mobile coupling contiguous surfaces (46, 48, 50) and a proximal mobile coupling protrusion (52), and the distal portion includes a distal coupling mobile surface (54) and a distal mobile coupling protrusion (56), and the proximal portion and the distal portion move relative to each other primarily in an axis of rotation perpendicular to a plane that extends through the proximal mobile coupling protrusion, the three proximal mobile coupling contiguous surfaces, the distal coupling mobile surface, and the distal mobile coupling protrusion in an implanted configuration. The proximal fixation element (22) couples to the three proximal mobile coupling contiguous surfaces and the proximal mobile coupling protrusion of proximal portion, and couples to a joint bone surface and a bone canal. The distal fixation element (24) couples to the distal coupling mobile surface and the distal mobile coupling protrusion, and couples to an opposing joint bone surface and a second bone canal.

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 stemless semi-constrained implantable interphalangeal joint replacement device and methods for use thereof. The stemless implantable device comprises a flexible connector that spans the joint space between and flexes in the sagittal plane. The flexible connector is secured along its proximal edge by a fixation system implanted transversely in the coronal plane through the first phalange and along its distal edge by a fixation system implanted transversely through the second phalange in parallel relationship with the first fixation system. In certain embodiments, the flexible connector is attached to bone using a rod or an anchor. In certain embodiments, the anchor is a cannulated screw anchor comprising a hollow shaft and a slot, the slot being of sufficient width to allow both a first barrel shape at the proximal edge of the flexible connector and a second barrel shape at the distal edge of the flexible connector to pass through the slot and into a joint cavity whereby said flexible connector will be held fast within the hollow shaft of the anchor. In certain embodiments, the flexible connector is a polymer connector which comprises bumper flanges that are oriented in a perpendicular aspect to the coronal plane of the flexible connector to prevent bone-on-bone contact.

Apparatus and methods for joint and bony segment replacement may utilize additive manufacturing (e.g., 3D printing) of various anatomic constructs with PEEK/zeolite/ion (PZI) material. Heavy metal ion loading options may be utilized which may provide differing properties to different surfaces of the resultant apparatus. Moreover, using the PZI material, the apparatus being implanted in joint and bony segment replacement may favorably manipulate the biologic microenvironment in which it may be implanted. Further, through use of PZI material, current large joint replacement options also may be disrupted including, but not limited to, modifications of the joint replacement itself, and the augments and supporting joint reconstruction devices used in bone loss situations. Methods for joint and bony segment replacement may provide mixing two or more types of PZI material together through an additive manufacturing process; and introducing the mixture as part of an implantable apparatus.

In one embodiment, the present invention includes an intramedullary osteosynthesis or arthrodesis implant including a central body, a first pair of legs extending from the central body to a pair of leg tips, and a second pair of legs extending from the central body, in a direction opposite the first pair of legs, to a pair of leg tips such that the central body, first pair of legs and second pair of legs are positioned alongside a longitudinal axis.

An orthopaedic implant system includes an orthopaedic implant having a plurality of fixation openings and a plug opening defining a plug opening diameter that is greater than a diameter of any of the fixation openings. The plurality of fixation openings include at least one first fixation opening configured to accept a fixation element inserted in a first bone and at least one second fixation opening configured to accept a fixation element inserted in a second bone. The plug opening is configured to accept a plug inserted in a joint space between the first bone and the second bone to cause compression distraction of the first bone and the second bone.

A joint implant can include a proximal joint implant element having a proximal curved interface surface with a plurality of proximal registration features. A distal joint implant element can be rotatably coupled to the proximal joint implant element, and can have a distal curved interface with a plurality of distal registration features that are complementary to the proximal registration features such that the registration features interface together to maintain registration between the proximal and distal joint implant elements. A joint implant element connector can include a proximal pin supporting the proximal joint implant element and a distal pin supporting the distal joint implant element. At least one of the curved interface surfaces can include a protrusion that prevents rotation of the joint implant elements when the protrusion contacts the opposite curved interface surface.

A joint implant can include a proximal joint implant element having a proximal curved interface surface and a proximal base portion with a hollow interior. The joint implant can also include a distal joint implant element coupled to the proximal joint implant element, having a distal curved interface surface facing the proximal curved interface surface, and a distal base portion with a hollow interior. A first filament segment and a second filament segment can extend from the proximal joint implant element to the distal joint implant element. The second filament segment can cross the first filament segment at a location between the proximal joint implant element and the distal joint implant element. The filament segments can be portions of at least one tensioned filament. A tensioning element can be positioned in the hollow interior to apply a tension force to the tensioned filament.

An orthopaedic implant system includes an orthopaedic implant having a plurality of fixation openings and a plug opening defining a plug opening diameter that is greater than a diameter of any of the fixation openings. The plurality of fixation openings include at least one first fixation opening configured to accept a fixation element inserted in a first bone and at least one second fixation opening configured to accept a fixation element inserted in a second bone. The plug opening is configured to accept a plug inserted in a joint space between the first bone and the second bone to cause compression distraction of the first bone and the second bone.