An expandable intervertebral implant device comprising: a first endplate having a bone contacting surface and an opposite interior surface, a first side and a second side, and having a leading end and a trailing end, each of the leading end and the trailing end including an aperture in communication with an inner volume of the implant; a second endplate having bone contacting surface and an opposite interior surface, a first side and a second side, wherein the first side of the first endplate is hingedly coupled to the first side of the second endplate; an expansion mechanism disposed between the interior surface of the first endplate and the interior surface of the second endplate, the expansion mechanism including a drive screw extending across the entire length of the expandable implant device from the leading end of the first endplate to the trailing end of the first endplate and including a first threaded shank and a second threaded shank, and a first threaded nut configured to engage at least a portion of the first threaded shank and a second threaded nut 132 configured to engage at least a portion of the second threaded shank; and at least one linkage coupled to first threaded nut and extending from the first threaded nut to the inferior surface of the second endplate and at least one linkage coupled to the second threaded nut and extending from the second threaded nut to the inferior surface of the second endplate wherein the expandable implant device, including the expansion mechanism, is symmetrical about a central plane bisecting the leading end and the trailing end of the first endplate such that the expandable implant device has a first half that is a mirror image of a second half of the expandable implant device. a first endplate having a bone contacting surface and an opposite interior surface, a first side and a second side, and having a leading end and a trailing end, each of the leading end and the trailing end including an aperture in communication with an inner volume of the implant; a second endplate having bone contacting surface and an opposite interior surface, a first side and a second side, wherein the first side of the first endplate is hingedly coupled to the first side of the second endplate; an expansion mechanism disposed between the interior surface of the first endplate and the interior surface of the second endplate, the expansion mechanism including a drive screw extending across the entire length of the expandable implant device from the leading end of the first endplate to the trailing end of the first endplate and including a first threaded shank and a second threaded shank, and a first threaded nut configured to engage at least a portion of the first threaded shank and a second threaded nut 132 configured to engage at least a portion of the second threaded shank; and at least one linkage coupled to first threaded nut and extending from the first threaded nut to the inferior surface of the second endplate and at least one linkage coupled to the second threaded nut and extending from the second threaded nut to the inferior surface of the second endplate wherein the expandable implant device, including the expansion mechanism, is symmetrical about a central plane bisecting the leading end and the trailing end of the first endplate such that the expandable implant device has a first half that is a mirror image of a second half of the expandable implant device. a drive screw extending across the entire length of the expandable implant device from the leading end of the first endplate to the trailing end of the first endplate and including a first threaded shank and a second threaded shank, and a first threaded nut configured to engage at least a portion of the first threaded shank and a second threaded nut 132 configured to engage at least a portion of the second threaded shank; and at least one linkage coupled to first threaded nut and extending from the first threaded nut to the inferior surface of the second endplate and at least one linkage coupled to the second threaded nut and extending from the second threaded nut to the inferior surface of the second endplate wherein the expandable implant device, including the expansion mechanism, is symmetrical about a central plane bisecting the leading end and the trailing end of the first endplate such that the expandable implant device has a first half that is a mirror image of a second half of the expandable implant device.