The present application relates to repair systems, and more particularly to fifth metatarsal repair systems and methods of use. The repair systems described herein can include a fixation device with a threaded section. The repair systems described herein can include one or more grippers designed to be deflected outward to grip the sidewalls of an intramedullary canal of the fifth metatarsal. The repair systems described herein can include an end cap. The end cap can include a fastener including thread designed to engage the threaded section of the fixation device. The end cap can include a cap designed to move relative to the fastener.

The bone fixation tangs with self-balancing extension compensate for the internal cavity shape of the intramedullary canal, thus avoiding the related issues of over-extension and under-extension of tangs. Over-extension, or pushing the tangs too deeply in the inner wall of the bone, is unnecessarily traumatic to the patient and may weaken the bone. Under-extension, or stopping extension before the tangs have locked into the interior surface of the bone, results in reduced mechanical strength, thus compromising the ability of the nail to provide support to the bone. The bone fixation tangs with self-balancing extension address this issue by allowing the tangs to balance their extension.

The present disclosure provides an orthopedic implant that can include an intramedullary stem transition region that fits in the bony intramedullary canal. The transition region can run as a monolithic piece between the implant body and the intramedullary stem, with a squared cross-section away from the implant body and a circular cross-section close to the stem body. The transition region can allow for higher implant strength with reduced rotation for the implant.

Intramedullary systems, expandable intramedullary nails, expandable anchors, and methods of using the same. The intramedullary system may include an expandable intramedullary nail configured to extend into an intramedullary canal of a long bone and/or one or more expandable anchors configured to extend at an angle transverse to the intramedullary nail. The intramedullary nails and/or anchors may include one or more integrated expansion mechanisms that allow for insertion in a contracted configuration and expansion into a deployed configuration to lock the relative position and prevent axial rotation and translation of the system.

The cannulated compression device creates fixation and compression across its tang housing, thus stabilizing and closing a bone fracture during placement. After insertion of the cannulated compression device, tangs are extended outward from the tang housing, locking the tang housing with respect to both rotational and axial movement. A compression nut is then threaded onto the proximal end of the tang housing. The nut has two sets of threads: a first set of threads interfaces with the tang housing, a second set of threads interfaces with the bone. By using different pitches, the amount of linear movement for the first set of threads and second set of threads is different.

A device for fixation of bone fragments (4, 8) comprises a locking plate (1) for fixation on the outside of an outer bone fragment (4). The locking plate has a distal portion (1 a) with at least one first hole (6), extending through the locking plate, for a distal fixing means (2) and a proximal portion (1 b) with a second hole (7), extending through the locking plate, for a proximal fixing means (3). The locking plate (1) is configured also with a third hole (9) which is located between said at least one first hole (6) in the distal portion (1 a) of the locking plate and said second hole (7) in the proximal portion (1 b) of the locking plate and this third hole extends as the other holes through the locking plate. The device further comprises a rotary-preventing and load-carrying means (10) which is configured for inser¬tion and fixation in said third hole (9) in the locking plate (1) and by cooperating with the proximal fixing means (3) prevent rotation of the proximal fixing means but permit displa¬cement thereof in its longitudinal direction relative to the rotary-preventing and load-car¬rying means during compression after surgery of the outer and inner bone fragments (4, 8) and facilitate for the proximal fixing means to carry loading forces acting on the inner bone fragment (8).

A bone anchoring element comprising a shaft (2) for anchoring in a bone, with a plurality of barb elements (7) arranged in at least one helical line around the shaft axis (M) is described, wherein said barb elements are elastically movable relative to the shaft. The bone anchoring element (1) is easy to press into a core hole bore in a bone. The barb elements (7) act in a similar manner as do the threads on a conventional bone screw and thus provide for depth positioning. Moreover, the barb elements at the same time secure the bone anchoring element and prevent it from sliding-out.

Systems and methods for intermedullary bone fracture fixation are described herein. The fixation device includes a main body having a flexible state and a rigid state. The fixation device further includes a proximal interface coupled to a proximal end of the main body to anchor the fixation device to an exterior surface of the bone and a distal interface coupled to a distal end of the main body to anchor the fixation device to an interior cavity of the bone. The fixation device further includes a locking interface to configured to convert the main body from the flexible state to the rigid state.

A device for fixation of inner and outer bone fragments comprises at least three fixation means (5), at least one tilting preventing means (6) and a securing plate (7). The fixation means (5) are configured to allow, during secondary compression of the inner and outer bone fragments (2, 3), a sliding movement of the fixation means and said outer bone fragment relative to one another and thereby an interruption of an engagement of the securing plate (7) with the outer bone fragment (3) without affecting the angular position of the fixation means relative to the securing plate and relative to one another. The tilting preventing means (6) is configured to allow, during said secondary compression, a sliding movement of the at least one tilting preventing means and said outer bone fragment (3) relative to one another and thereby an interruption of the engagement of the securing plate (7) with the outer bone fragment. The tilting preventing means (6) is also configured to prevent or counteract tilting of the device.

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.