227 results about "Interbody cage" patented technology

A vertebral cage is provided for use in preserving the space between adjacent vertebral during the process of spinal fusion. In particular, this cage has an open modified oval peripheral shape with a continuous fluid anterior wall having angled screw passages accessible through co-planar openings to allow the construct to be stabilized between adjacent vertebral bodies through their endwalls. In addition, the cage has a back to front wedge taper with pull-out resistant ratchet surfaces. Further, in a second aspect of the invention, the screw passages have a unique locking mechanism provided by oversized internal threads in combination with a second locking thread on the head of the associated bone screws that allows for axial translation of the screws within the screw passages. This in turn permits play in the angulation of the screw relative to the anchoring bone in order to optimize the screw placement in the bone.

An interbody vertebral cage facilitates minimally invasive approaches to the intervertebral disc for corrective restoration of disc height, stabilization between vertebra, and fusion. The preferred embodiment provides a streamlined, slender straight contour with a central hinge or other articulating apparatus that allows the introduction of the cage into the operative field and disc space in a minimally invasive, bone-sparing manner. After partial insertion, the hinge component is activated, allowing the operator to steer the cage anterior-medially within the disc space to an anterior-central position within the intervertebral space. In this state the cage is shaped like a crescent, chevron or boomerang.

An interbody fusion cage having upper and lower canals for receiving the heads of bone screws that have been pre-installed in opposing vertebral body endplates. The proximal wall of the cage preferably has a vertical slot that communicates with each canal and is adapted to allow access by a screwdriver and tightening of the screws.

An interbody fusion device is provided that includes an interbody cage, a fixation system and an actuation mechanism to deploy one or more blades. The cage acts as an intervertebral spacer and provides resistance to the compressive loads in the spinal column. The fixation system includes an anchor and a ramp. These components could be manufactured from various medical grade materials.

An implantable intervertebral fusion cage including a removable means for retaining material inside of the cage during implantation. Embodiments of the present invention are directed toward an implantable intervertebral fusion cage that includes at least one removable shield or veneer that is capable of retaining a surgically useful material, such as a spinal fusion-inducing material, inside of the fusion cage during implantation and/or until the shield or veneer is removed.

An apparatus and method for joining members together using a self-drilling screw apparatus or stapling apparatus are disclosed. The screw apparatus includes a shell and first and second first screw members having tapered ends and threaded bodies that are disposed within the shell. A drive mechanism rotatably drives the first and second screw members from the shell in opposite directions and causes the screw members to embed themselves in the members to be joined. The screw apparatus can be used to join members such as bones, portions of the spinal column, vertebral bodies, wood, building materials, metals, masonry, or plastics. The stapling apparatus includes first and second lever arms rotatably joined together at a fulcrum, and the lever arms rotate in opposite directions. First and second cartridges are disposed at the ends of the lever arms. Each cartridge is capable of holding a staple including a bracket, a nail member and an alignment slot. When the ends of the lever arms are rotated towards each other the staples from the cartridges are interlocked. The staples can be also be used to join members such as bones, portions of the spinal column, or vertebral bodies.

An interbody spinal fusion assembly includes an interbody cage, planar metal pins and bone fasteners. The interbody cage includes a metal cage and a PEEK insert. The PEEK insert is inserted into a slot of the metal cage and is secured to the metal cage with a pin. The assembled interbody cage is inserted in the space between two adjacent vertebras and is secured in placed with the planar metal pins and the bone fasteners.

A system and method of securing an intervertebral fusion cage within the intervertebral space between adjacent vertebra in which one or more slots are provided in an anterior surface of the cage each extending from an oversized aperture. A retention plate having a post and enlarged head is advanced into each slot via the oversized aperture and captured therein. The post is advanced to the terminal end of the plate and secured to vertebral body at its distal end by a bone screw. A locking clip is slideably positioned on the retention plate to prevent withdrawal of the bone screw. The slots preferably extend to margins of the anterior surface of the cage in, for example, the pattern of an “X” or an “H”. Sliding of the posts in the slots prevents the system from carrying the vertebral load (load shielding) and permits reduction in the intervertebral space to promote bone growth and fusion by graft material retained in the spacer.

A spinal interbody fusion implant has an impact rod fitting that is configured and adapted to be connected to an impact rod during implantation of the implant. The implant also comprises one or more openings that are encircled by portions of the implant and that extend into the top of the implant and continue through to and out of the bottom of the implant. The top and bottom of the implant each have a load bearing footprint. Each of the load bearing footprints has a centroid that is closer to the leading end of the implant than to the trailing end of the implant. A method of implanting a spinal interbody fusion implant between two vertebrae of a spine comprises inserting the implant into a patient through a posterior incision and guiding the implant into a position between the two vertebrae using a pair of shims.

An interbody cage can be utilized in a multi-access approach. Such a device can be inserted in an MIS exposure and then can be expanded insitu. Such a multi access device can expand in width to cover a larger area for fusion to occur. Such device includes a unique feature that allows for the graft material to stay in place upon deployment. Such a cage device can be configured with four graft boxes that can be filled with allograft or autograft material to allow for fusion to occur. Along with the graft boxes, such a cage can also be configured with a unique feature in the posterior piece of the device that has small cut outs or ports to allow for moldable allograft material to be injected through the inserter device.

An improved interbody spinal fusion assembly for fusing a first vertebra to a second vertebra includes an interbody cage, a first plate and a second plate. The interbody cage is configured to be implanted between the first and second vertebras and comprises through-apertures configured to be filled with bone fusing material. The first plate comprises an L-shaped body having a first end configured to be attached to a first location of the interbody cage, a second end configured to be attached to a first location of the first vertebra and a corner formed between the first and second ends and configured to be attached to a second location of the first vertebra or a third location of the interbody cage. The second plate comprises a first end configured to be attached to a second location of the interbody cage and a second end configured to be attached to a first location of the second vertebra.

Embodiments of the present invention are directed toward a system and method for facilitating the fusion of two vertebral bodies utilizing an oblique lateral surgical trajectory. Certain embodiments disclose a method for a surgical approach into one or more interbody spaces between two vertebral bodies on a trajectory through Kambin's Triangle. Certain embodiments of the invention include a method to open a pathway into a target area between two vertebral bodies of the spine using a series of one or more dilators. Certain embodiments of the invention comprise a system for placing an expandable interbody cage between two vertebral bodies. Certain embodiments of the invention incorporate a series of instruments to deliver an expandable interbody cage.

This invention relates to intervertebral spacers for use in orthopedic treatment of spinal defects. The intervertebral space is formed of a shape memory polymer. The spacer can be fabricated into a desired configuration and then deformed into an alternative or deformed configuration. Cooling the deformed spacer effectively freezes the spacer into its deformed conformation. The deformed configuration can be selected to facilitate implantation of the spacer into a prepared disc space between adjacent vertebrae. During operation, the surgeon can heat the spacer to allow it to revert to its original configuration. The spacer in its original conformation is sized to restore and/or maintain the adjacent vertebrae in a desired conformation and disc space height.

The present invention relates to an interspine cage inserting device, and more particularly, to an interspine cage inserting device capable of stably and easily inserting a cage inserted between spines.

Disclosed is an interspine cage inserting device. The interspine cage inserting device includes: a support unit including an internal hollow portion and accommodating an internal rod coupled with a cage inserted between spines; a first moving unit formed on one side of the support unit and pushing the cage in connection with one side of the cage; a second moving unit formed on the other side of the support unit and connected with the other side of the cage to be connected to move backward when the first moving unit moves forward; and an adjustment unit connected to the support unit so as to adjust a rotational amount of the cage by adjusting movement of the first moving unit and the second moving unit.

A spinal plate selection and positioning system is provided for use in a spinal fusion procedure. The system may comprise an elongated guide member that is removably securable to an interbody cage by a holding rod. An interbody plate may be aligned and positioned above the interbody cage installed in a disc space. A drill guide may also be aligned and positioned above the interbody plate. The drill guide may be utilized to drill pilot holes in the vertebrae defining the disc space. Fasteners to secure the interbody plate may also by installed using the drill guide. The use of the guide member ensures that the interbody plate is properly aligned and positioned with respect to the interbody cage.

Disclosed herein is a spinal interbody cage, comprising an upper plate, a lower plate, a screw arbor and two slide blocks. The screw arbor includes a first section with an outer thread and a second section with an outer thread. The outer threads of the first and second sections have opposite directions. The upper plate respectively has a pair of upper plate slanted surfaces proximate to the first and second sections of the screw rod. The lower plate respectively has a pair of lower plate slanted surfaces proximate to the first and second sections. The screw rod is disposed in and cooperates with the inner threads of the slide blocks. The screw rod and slide blocks are arranged between the upper and lower plates. The slide blocks respectively have two slide block slanted surfaces, each abutting and cooperating with one of the upper and lower plate slanted surfaces so as to distance the upper plate from the lower plate when the slide blocks are distanced from each other by rotating the screw rod in one direction.