A bone screw for sacroiliac joint fusion is characterized by a longitudinal bone screw and a cylindrical sleeve received on a proximal end of the bone screw. The sleeve has axially extending fins or flutes on its outer surface that extend generally from one end of the sleeve to the other end of the sleeve. This feature allows the sleeve to resist reverse rotation which, in turn, aids in preventing back-out of the bone screw once installed. The bone screw has a self-tapping tip that allows the bone screw to be installed without need for a pilot hole, and self-harvesting geometry that gathers and retains bone shavings in and along the bone screw that are produced by bone screw installation for use as graft for bone fusion.

A surgical fastener includes a cannulated collapsible fastening body having a trailing end and a leading end and defining a passage extending from the trailing end to the leading end, and a pin having a non-threaded shaft at least partially disposed within the passage and an enlarged tip. A method of using the surgical fastener includes engaging an end of a driver with a recess in a head of the surgical fastener, including inserting an extension at the end of the driver into the passage, and inserting the fastener into a bore in a bone during which the extension of the driver abuts a trailing end of the shaft of the pin to prevent the pin from moving in a direction from the leading end to the trailing end relative to the fastening body.

A graft or prosthetic element suitable, e.g., for replacing a tendon or ligament is fastened in a bone tunnel or blind opening with the aid of a fastener. In a first step, the graft or prosthetic element is press-fitted in the tunnel or opening by forcing the fastener into the opening or by positioning the fastener in the opening and then expanding it, wherein the fastener is in contact with the graft or prosthetic element and with the bone wall of the tunnel or blind opening. In a second step, the fastener is anchored in the bone wall of the tunnel or blind opening with the aid of a liquefiable material which is liquefied in the vicinity of the bone wall where it is in contact with the fastener and by making the liquefied material penetrate into the bone wall.

A threaded implant can be provided with an elongated main body having external threads configured to thread into bone, and an internal support structure located within the external threads. The internal support structure has a helical arrangement that extends in an opposite direction to the external threads. Other threaded implants and methods are also disclosed.

The present disclosure provides a bone-implantable device and methods of use. The bone-implantable device comprises a body having an exterior surface, wherein a portion of the exterior surface includes a cured osteostimulative material comprising MgO.

A fixation system (900) for the fixation of a first bone fragment (932) relative to a second bone fragment (934); the fixation system (900) comprising at least one first bone engagement element engagable with the first bone fragment (932), wherein the first bone engagement element has an elongate body portion, a proximal end, a distal end, and a passageway extending through the body portion from the proximal end to the distal end, at least one further bone engagement element engageable with the second bone fragment (934) and having a tensile element (920) securement portion for affixing a tensile element (920) to the further bone engagement element; wherein the tensile element (920) passing the first bone engagement element when engaged with the first bone fragment (932) is fixed relative to the further bone engagement element when engaged with the second bone fragment (934) by the tensile element (920) securement portion; such that the first bone fragment (932) is affixed relative to the second bone fragment (934) from tensile stress in the tensile element (920).

A pedicle bone fastener may include a shaft, a helical thread, and an integrated attachment feature. The shaft may include a proximal end, a distal end, and a longitudinal axis. The helical thread may be disposed about the shaft along the longitudinal axis between the proximal and distal ends of the shaft. The helical thread may include a first undercut surface and a second undercut surface. The first undercut surface may be angled toward one of the proximal end and the distal end of the shaft and the second undercut surface may be angled toward the other one of the proximal end and the distal end of the shaft. The integrated attachment feature may be disposed at the proximal end of the shaft and configured to be adjustably secured to a spinal stabilization implement.

The present disclosure provides a bone-implantable device and methods of use. The bone-implantable device comprises a body having an exterior surface, wherein a portion of the exterior surface includes a cured osteostimulative material comprising MgO.

A navigation-guided surgery fixation (NGSF) system. The NGSF system may include a fixation member for fixating an intraoral surgical guide. The fixation member may include a shank portion and a shaft portion, the shaft portion extending out from an end portion of the shank portion, and wherein the shank portion has a diameter greater than that of the shaft portion; and a sleeve member, wherein the sleeve member may include a through-hole substantially the same size of the shank portion and configured to receive the shank portion therein.

A bone screw, and method of using the same, are described. The bone screw includes a head, a distal threaded portion, and an expandable intermediate portion. The intermediate portion is expandable in response to a force being applied from an unstressed or relaxed state to a stressed or unrelaxed state. A removable core pin may be inserted into the intermediate portion to stretch or stress and/or stabilize the intermediate portion.