A disc replacement device including a first body member with a convex articulation surface and a second body member with a concave articulation surface is disclosed. When operably positioned, the convex articulation surface engages the concave articulation surface to provide for movement therebetween. The disc replacement device also includes a first opening in the first body member and a second opening in the second body member, wherein the openings are angled and extends from the front aspects of the body members through the external surfaces. The disc replacement device further includes at least two bone fasteners for insertion into the first and second openings to secure the disc replacement device to a first and second vertebra. An interbody motion device and fusion implant, as well as a surgical method for implantation are also disclosed.

Threaded sacro-iliac joint stabilization (e.g., fusion, fixation) implants and methods of implantation and manufacture. Some implants include a threaded distal region, an optionally threaded central region, and an optionally threaded proximal region. The distal, central, and proximal regions have lengths such that when the implant is laterally implanted across a SI joint, the distal region can be positioned in a sacrum, the central region can be positioned across an SI-joint, and the proximal region can be positioned in an ilium.

The present invention relates to a radial head implant with a head, a shaft and a threaded anchor.

A hard-tissue implant is provided. The implant includes a shaft, a surface of the shaft, pillars for contacting a hard tissue, slots to be occupied by the hard tissue, and a thread disposed helically along the shaft, extending radially from the shaft, and having a plurality of grooves oriented transversely with respect to the thread that define a series of thread segments and thread gaps along the thread. The implant has a Young's modulus of elasticity of at least 3 GPa and a ratio of (i) the sum of the volumes of the slots and the thread gaps to (ii) the sum of the volumes of the pillars and the thread segments and the volumes of the slots and the thread gaps of 0.40:1 to 0.90:1. Also provided is a method of use of the implant for fusion of two or more bones in an individual in need thereof.

A bone fusing implant device includes an elongated body extending along a longitudinal direction, and has one or more elongated grooves extending along the longitudinal direction on an outer surface of the elongated body and one or more elongated ridges alternating with the one or more elongated grooves and extending along the longitudinal direction on the outer surface of the elongated body. The elongated body includes a first segment having an outer surface with cortical threads, a second segment having an outer surface with cancellous threads, a top segment and a bottom segment. The first segment is configured to engage a cortical bone with the cortical threads and the second segment is configured to engage a cancellous bone with the cancellous threads. The cortical threads and the cancellous threads are formed on the one or more elongated ridges and do not extend into the one or more elongated grooves.

A surgical fastener manipulation tool in accordance with embodiment of the present invention is useful by a surgeon to place fasteners such as threaded screws. The surgical fastener manipulation tool selectively engages a mating structure of fastener for securing the fastener thereto. Thus, advantageously, the surgical fastener manipulation tool can be used for placing such fasteners and/or can be used for extracting (i.e., removing) such fasteners. The ability to extract a fastener (e.g., a threaded bone screw) with the same tool used for placing it is highly beneficial due to time savings during a surgical procedure and is advantageous with respect to prior art fastener manipulation tool configurations that require placement and extraction tools to be differently configured.

A disc replacement device including a first body member with a convex articulation surface and a second body member with a concave articulation surface is disclosed. When operably positioned, the convex articulation surface engages the concave articulation surface to provide for movement therebetween. The disc replacement device also includes a first opening in the first body member and a second opening in the second body member, wherein the openings are angled and extends from the front aspects of the body members through the external surfaces. The disc replacement device further includes at least two bone fasteners for insertion into the first and second openings to secure the disc replacement device to a first and second vertebra. An interbody motion device and fusion implant, as well as a surgical method for implantation are also disclosed.

Systems for performing a minimally invasive sacroiliac joint fusion. The system may be in the form of a disposable kit, with the components streamlined so that the procedure can be performed in a few minutes. The screw components are self-drilling and self-tapping. The system may deploy blades through the walls of the primary screw which cut away material as the primary screw is set, for denuding the sacroiliac joint. The primary screws are designed to bore through and internalize bone tissue in an autografting process. The implant system may include components for packing bone grafting material into the screw to supplement autograft bone tissue internalized in the primary screw during placement. At least one side screw is passed through a head of the primary screw to anchor the head and inhibit rotation (backing out) after implantation. The primary screw may include features that facilitate rotational alignment.

A surgical fastener manipulation tool in accordance with embodiment of the present invention is useful by a surgeon to place fasteners such as threaded screws. The surgical fastener manipulation tool selectively engages a mating structure of fastener for securing the fastener thereto. Thus, advantageously, the surgical fastener manipulation tool can be used for placing such fasteners and/or can be used for extracting (i.e., removing) such fasteners. The ability to extract a fastener (e.g., a threaded bone screw) with the same tool used for placing it is highly beneficial due to time savings during a surgical procedure and is advantageous with respect to prior art fastener manipulation tool configurations that require placement and extraction tools to be differently configured.

A method and system for performing bone fusion and/or securing one or more bones, such as adjacent vertebra, are disclosed. The screw includes a threaded distal piece fixedly attached connected to an inner post. Both the inner post and the proximal piece have non-cylindrical receptacles at their proximal ends for engagement with driving tools. Independent rotation of the proximal piece and the distal piece enables for compression or decompression to modify the gap between two bones or bone fragments. During use, the distal piece of the bone screw is placed at least partially within a distal bone, the proximal piece is placed at least partially within a proximal bone, and one of two pieces is rotated while the other is held in a fixed position, causing movement of the proximal and distal bones relative to each other.