A fusion device assembly for fusion of a joint, including a first screw portion, including a first distal end, a first proximal end, a first radially outward facing surface including a first diameter, and a first hole, a second screw portion, including a second distal end, a second proximal end, a second radially outward facing surface including a second diameter, and a second hole, and a section, including a first end connected to the first proximal end, a second end connected to the second distal end, a third radially outward facing surface including a third diameter, the third diameter being less than the first diameter and the second diameter, and a third hole, wherein the first hole, the second hole, and the third hole are in fluid communication.

The present invention relates to an implant, and more precisely in the preferred embodiment, a fenestrated non-distracting rod for use in association with spinal surgery. The implant is to be placed via the pre-sacral approach in an embodiment of the invention. The fenestrations incorporated within the preferred embodiment are configured to collect bone during transit through the sacrum, and then optionally configured to contact and/or deposit bone collected into the L5-S1 disc space area.

A fusion device assembly for fusion of a joint, including a self-harvesting fusion device, including a distal end, a proximal end, a radially outward facing surface including threading, a bore extending from the proximal end, at least one aperture, and at least one flute arranged at least partially adjacent the at least one aperture and operatively arranged to direct bone material into the bore.

A porous fusion device configured to aid in fusion of two or more biological tissues. The porous fusion device comprising an exterior frame, an exterior lattice cage within the exterior frame, an interior porous lattice structure, and a material injection port disposed at the exterior frame and projecting into the interior porous lattice structure. The interior porous lattice structure may be characterized by a variable density progression that mimics biological tissues and allows for material dispersal therethrough.

Bone transplant made of a cortical bone substance having a screw shank and a screw head for introducing a screwing-in torque. Both the screw shank and the screw head are provided with an external thread, in which at least the external thread of the screw shank is a multi-start thread. Due to the design, on the one hand a certain stroke can be achieved with fewer revolutions or in a shorter time, whereby the screwing-in behavior is improved and the tendon tissue is protected. On the other hand, the use of multiple threads provides a high surface area for the tendon tissue to grow on the tendon anchor, which improves fixation of the tendon and increases rotational stability. The bone transplant according to the invention thus ensures good fixation of the tendon and can be implanted quickly.

In some embodiments, an implant configured to span a joint between a first bone and a second bone may include a proximal end configured to reside in the first bone, a distal end including threads configured to reside in the second bone distal to the first bone in response to rotation of the implant about an axis of rotation, an axis extending between the proximal end and the distal end, and an exterior surface extending from the proximal end to the distal end. The exterior surface may include a first recess formed therein. The first recess may include an undercut such that the first recess has a first perimeter at an exterior of the first recess, and a second perimeter, greater than the first perimeter, at an interior of the first recess, wherein the interior is closer to the axis than the exterior.

The invention relates to methods, devices, and systems for an improved bone fixation screws used as fastening devices to stabilize bone to its adjacent substrate. More particularly, the invention relates to methods, devices and systems for an improved, low profile, multi-threaded screw with mating features adapted to allow other multi-threaded screws in close proximity.

An apparatus includes a body extending from a first end to a second end. The first end is a leading end, and the second end includes a first coupling element configured to couple the body to a first other component. The body includes an external fixation element extending along a length of the first component. The external fixation element is configured to engage bone. Systems and methods are also disclosed.

A fusion device assembly for fusion of a joint, including a self-harvesting fusion device, including a distal end, a proximal end, a radially outward facing surface including threading, a bore extending from the proximal end, at least one aperture, and at least one flute arranged at least partially adjacent the at least one aperture and operatively arranged to direct bone material into the bore.

An apparatus includes a body extending from a first end to a second end. The first end is a leading end, and the second end includes a first coupling element configured to couple the body to a first other component. The body includes an external fixation element extending along a length of the first component. The external fixation element is configured to engage bone. Systems and methods are also disclosed.