The present invention provides an intervertebral implant for implantation in a treated area of an intervertebral space between vertebral bodies of a spine. The implant includes a spacer portion having an inferior and superior surface, wherein the inferior and superior surfaces each have a contact area capable of engaging with anatomy in the treated area, and the inferior and superior surfaces define a through-hole extending through the spacer body. The present invention further provides holes extending from a side portion to the inferior and superior surfaces of the spacer portion and a plate portion rigidly coupled to the spacer portion, wherein the plate portion contains holes for receiving screws. A fastener back out prevention mechanism adapted on the plate to prevent the back out of the fasteners from the holes and to secure the spacer to the plate of the intervertebral implant.

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.

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 body portion, a first endplate, and a second endplate, the first and second endplates capable of being moved in a direction away from the body portion into an expanded configuration or capable of being moved towards the body portion into an unexpanded configuration. The fusion device is capable of being deployed and installed in both configurations.

The present disclosure pertains to ankle prostheses. In an example embodiment, the ankle prosthesis comprises an adjustable and replaceable intermediate implant that is disposed between a tibial implant and a talar implant. The intermediate implant is adjustable relative to the tibial implant and can be interlocked therewith once adjusted. Methods of using, fitting, and adjusting the device are also described. Still other embodiments are described.

A device for insertion into a spinal (intervertebral or intravertebral) space is expandable and contractable. The device includes a body assembly, a top member configured to fit within a gap in the body assembly, a drive gear disposed within the body assembly at a distal end of the body assembly, a proximal gear assembly, and a distal gear assembly. The drive gear includes a receiver accessible from outside the body assembly and configured to be rotated in order to rotate the drive gear. Each gear assembly is attached to the top member. The distal gear assembly engages the drive gear. Rotation of the drive gear in a first direction causes the gear assemblies to translate the top member away from the body assembly, and rotation of the drive gear in a second direction causes the gear assemblies to translate the top member towards the body assembly.

A spinal implant for placement between vertebral bodies includes a first member for engaging one of the vertebral bodies, a second member for engaging an opposing one of the vertebral bodies, and at least one extendable support element for inducing movement of the entire first member away from the second member. The first member is connected to the second member such that the first member moves away from the second member by a larger distance at a first end of the implant than at a second end of the implant. A connecting member may connect the first and second members together at the second end of the implant. The connecting member may include one or more rotatable linkages, or the connecting member may be an extension of one of the first and second members slidably received within a track defined within the other of the first and second members.

Expandable fusion devices, systems, and methods. The expandable fusion device includes one or more integrated deployable retention spikes configured to resist expulsion of the device when installed in the intervertebral disc space. The implant may include upper and lower main endplates, an actuator assembly configured to cause an expansion in height of the upper and lower main endplates, and a sidecar assembly including a sidecar carrier, an upper carrier endplate engaged with an upper spike, and a lower carrier endplate engaged with a lower spike such that forward translation of the sidecar carrier pushes against the upper and lower carrier endplates, thereby deploying the upper and lower spikes.

An expandable interbody implant is expandable from a contracted configuration to an expanded configuration by moving opposing first and second vertebral-engaging surfaces apart from one another. The implant includes a locking system for restraining contraction of the implant. The locking system may have a locked configuration, in which the first and second surfaces are prevented from moving back towards the contracted configuration, and the locking system may have an unlocked configuration, in which the first and second surfaces are permitted to move back towards the contracted configuration. The locking system may be controlled by rotation of one or more pinions. The pinions may, in turn, be controlled by linear movement of a rack. The rack may be configured so as to bias the locking system towards the locked configuration. The implant may also include a stop for constraining the maximum expansion of the implant.

An expandable medical implant that includes a lower lifting plate, an upper lifting plat, a distal lifting block, a proximal lifting block, a rotational block, a lifting screw, and a locking nut, and related methods of use. Also, an expandable medical implant that includes a lower lifting plate having a proximal lower angled lifting portion, an upper lifting plate having a proximal upper angled lifting portion, a center fork block, a lifting lobe, a distal screw, and a proximal nut, and related methods of use.

A joint spacer has first and second endplates, with each having a bone engaging surface, and at least two cams with an inclined cam surface positioned on an opposite side. First and second slides, each having ramps with an inclined surface are engaged with the cams of the endplate. The first slide has an angled portion at an end, and the second slide has a hinge portion. A threaded shaft has a hinge portion connected to the slide hinge portion, connecting the shaft to the slide, enabling the shaft to pivot. A nut is threaded to the shaft, and can contact and interfere with the angled portion of the first slide to drive the first slide with respect to the second slide. This results in engagement of the cams and ramps to drive the endplates apart to increase the spacer height.