Expandable spinal interbody assembly

An expandable implant comprising:

• a top support assembly comprising an upper surface and an upper side portion, the upper surface configured to engage a first portion of bone, the upper side portion extending downward from the upper surface and defining a first side surface, the upper side portion including an upper web structure defining a first plurality of voids extending from the first side surface in the upper side portion;
• a bottom support assembly comprising a lower surface and a lower side portion, the lower surface configured to engage a second portion of bone, the lower side portion extending downward from the lower surface and defining a second side surface, the lower side portion including a lower web structure defining a second plurality of voids extending from the second side surface in the lower side portion;
• a first wedge member slidably coupled to the top and bottom support assemblies, the first wedge member comprising a solid bull nose;
• a second wedge member slidably coupled to the top and bottom support assemblies;
• and
• a control shaft coupled to the first and second wedge members and configured to control relative movement between the top support assembly and the bottom support assembly between a collapsed position and an expanded position;
• wherein the upper web structure and the lower web structure each form multiple web structures having honeycomb patterns;
• wherein the control shaft includes a tool recess and an access port configured to provide fluid communication between an exterior of the implant and an interior of the implant;
• and
• wherein the access port extends obliquely relative to a longitudinal axis of the control shaft.

An expandable implant, comprising:

• a top support assembly including:
• an upper surface configured to engage a first portion of bone;
• a first central aperture extending from the upper surface to an interior of the implant;
• a first grid structure surrounding the first central aperture and comprising a first plurality of elongated apertures extending from the upper surface toward the interior along a first direction;
• and
• at least one side portion extending downward from the upper surface and defining an upper web structure comprising a plurality of voids extending from a first side surface along a second direction generally perpendicular to the first direction;
• a bottom support assembly including:
• a lower surface configured to engage a second portion of bone;
• a second central aperture extending from the lower surface to the interior;
• a second grid structure surrounding the second central aperture and comprising a second plurality of elongated apertures extending from the lower surface toward the interior along the first direction;
• and
• at least one lower side portion extending upward from the lower surface and defining a lower web structure comprising a plurality of voids extending from a second side surface along the second direction;
• and
• a control assembly coupled to the top support assembly and the bottom support assembly and configured to control relative movement between the top support assembly and the bottom support assembly between a collapsed position and an expanded position;
• wherein each of the first plurality of elongated apertures and the second plurality of apertures is elongated along the first direction such that a length of each aperture along the first direction is greater than a width of each aperture along a second direction perpendicular to the first direction;
• wherein the control assembly comprises a front portion coupled to a rear portion via a control shaft, the front portion comprising a solid bull nose;
• wherein the control shaft includes a tool recess and an access port configured to provide fluid communication between an exterior of the implant and the interior;
• and
• wherein the tool recess is configured to interact with a driving tool, and wherein the access port Is configured such that the driving tool is not permitted to pass into the access port.