The technical description relates to an expandable intervertebral spacer configured to engage an intervertebral disk. An example expandable intervertebral spacer includes a main body, a first endplate, a second endplate, a driving member, and an actuation member. The expandable intervertebral spacer is transitions from a first configuration to a second configuration by structural interfacing between steps defined on the first endplate, the second endplate, and the driving member. Steps include a surface that lies on a plane disposed at a non-parallel angle to the longitudinal axis of the intervertebral spacer.

Proposed is a vertebral cage including a body which is inserted between a vertebra and a neighboring vertebra, and is provided with a space part that can be filled with bone powder; a blade which is rotatably provided on an inner side surface of the body. The cage also includes a locking means which fixes the blade, which has or has not been rotated on the body, on the inner side surface of the body, wherein the locking means comprises fixing protrusions and groove parts which are provided on mutually facing surfaces of the body and the blade, and coupled to each other.

An expandable implant may include a superior endplate and an inferior endplate hingedly coupled together. The superior endplate may have at least one track extending in a proximal-to-distal direction and an inferior endplate may have at least one track extending in the proximal-to-distal direction. The implant may further include a proximal plate having a superior engagement surface and an inferior engagement surface. At least one shim may be disposed within the at least one tracks of the superior endplate and interior endplate, and the at least one shim may define an angle of inclination between the superior endplate and interior endplate. The at least one shim may be insert between the superior and inferior endplates to effectuate expansion and angulation. In various embodiments, the superior endplate may be supported by the superior engagement surface and the inferior endplate may be supported by inferior engagement surface.

An expandable vertebral body implant, and methods of assembly and using the implant. The vertebral body implant includes a body with a first end and a second end, a rotating member rotatably coupled to the first end of the body, wherein an end includes a plurality of first notches inset into the rotating member, an extension member moveably coupled to the rotating member, and a locking member positioned on an interior of the body. Methods for assembling and using the vertebral body implant are also disclosed.

A spinal implant is provided including an upper surface, a lower surface, a front surface and a back surface, two side surfaces extending between the upper surface and the lower surface, the two side surfaces extending between the front surface and the back surface and an opening positioned closer to the back surface than the front surface. The opening is provided to contain graft material that spans between a cortical rim of the upper vertebral body and the cortical rim of the lower vertebral body. The method includes packing the opening with graft material, wherein the graft, material spans between the decorticated cortical rim of the upper vertebral body and the decorticated cortical rim of the lower vertebral body.

In an intervertebral implant having at least two upper and two lower contact bodies that have contact surfaces. An actuator has a threaded body which has an extension axis and is provided with opposite-handed threads arranged one behind the other. Wedges sit on the threaded body in an axially moveable manner and can be moved along the threaded body by rotating the same. Ramps of at least one ramp body of a wedge engage at least with counter-surfaces of at least some of the contact bodies and extend toward one another at a finite angle of less than 90°. The wedges are double wedges having two ramp bodies arranged one behind the other, and the ramps of one ramp body are oriented differently to the ramps of the other ramp body. The ramps of the first ramp body engage directly with the contact bodies laterally.

An expandable interbody spacer for placement between adjacent vertebrae having two or more upper and lower endplates and lateral expansion wedges configured to couple a drive means to expand both a height and a width of the expandable interbody spacer from a collapsed state to an expanded state.

An expandable, adjustable inter-body fusion device is presented. The inter-body fusion device can have a first plate, a second plate, and an insert positioned substantially therebetween the first plate and the second plate. The first plate, the second plate, and the insert define an interior cavity. Moving the insert longitudinally with respect to the first and second plates increases or decreases the distance of the first plate with respect to the second plate, effectively expanding the inter-body fusion device and increasing the volume of the interior cavity. The angle between the first plate and the second plate is selectively adjustable.

An expandable interbody spacer that is delivered in the anterior approach with adjustable height and end plate angulation (lordosis). The expandable interbody spacer is configured to have an initial collapsed state having a first height suitable for being inserted into an intervertebral space defined by a pair of adjacent vertebrae, and an expanded state having a second height that is greater than the first height. The expandable interbody spacer may be expanded from the initial collapsed state to the expanded state in-situ. The expanded state increases the distance between the adjacent vertebrae and provides support to the adjacent vertebrae while bone fusion occurs and also provides rigid support between the adjacent vertebrae that withstands compressive forces. By inserting the expandable interbody spacer into the intervertebral space in the initial collapsed state, it is possible to perform the surgery percutaneously with minimal disruption to tissues surrounding the surgical site and intervening soft tissue structures.

A device for performing intervertebral body fusion between at a vertebral joint, and associated systems and methods for manufacturing the device are disclosed herein. In some embodiments, the device includes an expandable main body configured to be locked in a desired configuration between a superior and an inferior vertebrae at the vertebral joint to facilitate the intervertebral body fusion at the vertebral joint. A first endplate is connected to the main body. The first endplate can include a superior surface having one or more patient-specific features configured to engage and mate with an inferior surface of the superior vertebra. A second endplate is connected to the main body. The second endplate can include an inferior surface having one or more patient-specific features configured to engage and mate with a superior surface of the inferior vertebra.