In some embodiments, the present disclosure relates to a system that includes an insertion tool and a drill guide. The insertion tool includes a body with a distal portion and a distal end. The body has a first engagement feature extending longitudinally along the distal portion and two arms extending longitudinally from the distal end of the body. The drill guide includes two bores and an open faced channel therebetween. The open faced channel includes a second engagement feature slidably engageable with the first engagement feature on the body of the insertion tool. The two bores are adapted for the disposal of a fastener driver tool therethrough.

An expandable vertebral device includes a base assembly having end portions that are movable relative to one another via adjustment of an adjustment mechanism at the first end portion. A plurality of movable plates are movably disposed at the base assembly and are at least vertically movable relative to the base assembly as the end portions are moved relative to one another. Each of the end portions has a pair of vertical guide elements and may have a pair of lateral guide elements. Each of the movable plates includes a vertical guide that moves along the respective vertical guide element and may have a lateral guide that moves along a respective lateral guide element. When the adjustment mechanism is adjusted to draw the end portions toward one another, the movable plates move outward from a longitudinal axis of the base assembly as the guides move along the respective guide elements.

Systems and methods are described for correcting sagittal imbalance in a spine including instruments for performing the controlled release of the anterior longitudinal ligament through a lateral access corridor and hyper-lordotic lateral implants with detachable fixation tabs.

Implants, systems, instruments, methods, and kits for metatarsophalangeal joint arthroplasty may include metatarsal arthroplasty implants, repositioning guides, broach tools, inserter tools, and sterilizable packaging configured to facilitate metatarsal arthroplasty surgical procedures. The metatarsal arthroplasty implants may generally include an articular member having a convex articular surface, a concave bone-facing surface opposite the convex articular surface, and at least one side surface intermediate the convex articular surface and the concave bone-facing surface, as well as a central shaft sized for insertion into a metatarsal bone having a central shaft longitudinal axis, a central shaft proximal end coupled to the concave bone-facing surface of the articular member, and a central shaft distal end extending away from the concave bone-facing surface of the articular member along the central shaft longitudinal axis.

The present invention provides an expandable fusion device capable of being installed inside an intervertebral disc space to maintain normal disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. In one embodiment, the fusion device includes a central ramp, a first endplate, and a second endplate, the central ramp capable of being moved in a first direction to move the first and second endplates outwardly and into an expanded configuration. The fusion device is capable of being deployed down an endoscopic tube.

A fusion cage has a first component that defines an outside surface that is configured to engage a vertebral endplate, and an interior surface. The fusion cage has a second component that defines first and second opposed surfaces. One of the first and second opposed surfaces can mate with the interior surface of the first component. The fusion cage can include vertical and lateral throughholes adapted to enhance fusion.

An angled fixation device, such as an angled screw. This angled fixation device may be used by the surgeon to secure a spacer to a spinal disc space. The proximal end portion of the angled fixation device is driven perpendicular to the anterior wall of the spacer, and so is parallel to the vertebral endplates and in-line with the inserter. The distal end portion of the angled fixation device is oriented at about a 45 degree angle (plus or minus 30 degrees) to the vertebral endplate it enters.

An expandable fusion device may include a first endplate and a second endplate. The expandable fusion device may also include first and second ramps configured to mate with both the first and second endplates. The first ramp may include a mating feature having a first angle relative to a vertical axis, and the second ramp may include a mating feature having a second angle relative to the vertical axis such that the first angle is different from the second angle. In particular, the first and second ramps may be configured to provide for symmetrical expansion of the first and second endplates.

A method and system are provided for installing a spinal fusion cage. The spinal fusion cage includes an outer cage having a proximal outer cage endwall and a distal outer cage endwall. An inner cage has a proximal inner cage endwall and a distal inner cage endwall. The proximal and distal inner cage endwalls each are in slidable contact with a corresponding one of the proximal and distal outer cage endwalls. The inner and outer cages collectively define a fusion cage cavity space having a volume which varies responsive to relative sliding of the inner cage with respect to the outer cage. An actuation tool includes a shaft and an operative portion. The operative portion of the actuation tool has an asymmetrically tapered portion which includes a longitudinally aligned face extending substantially parallel to the longitudinal axis and an angled face extending at an acute angle to the longitudinal axis.

An allogeneic or xenogeneic implant for intervertebral disc replacement includes a body. The body may include one or both of a plurality of grooves or tubular apertures. The body may be formed of partially decalcified bone. The plurality of tubular apertures may be defined within the body and be positioned to allow inflow of decalcifying solutions for rapid and uniform decalcification. After partial decalcification, the body may be pliable and compressible.