Hinged expandable corpectomy device

An expandable corpectomy implant comprising:

• a housing defined by four walls each having an inner surface forming a substantially square receptacle with an upper edge forming a first end opening and a lower edge end forming a second end opening;
• a first plate having an upper surface with four first plate sidewalls depending therefrom, said first plate sidewalls forming a substantially square frame having an inner surface forming a cavity and an outer surface slidably insertable into said first end opening of said housing receptacle, a pair of centrally disposed slots extending from the upper surface to a bottom edge in opposing first plate sidewalls;
• a second plate having a lower surface with four second plate sidewalls depending therefrom, said second plate sidewalls forming a substantially square frame having an inner surface forming a cavity and an outer surface slidably insertable into said second end opening of said housing receptacle, a pair of centrally disposed slots extending from the lower surface to a top edge in opposing second plate sidewalls;
• a toggle member for positioning said first plate from said second plate, said toggle member having an upper expansion member plate with a cylindrical bar positioned along a distal end slidably engaging said first plate slots and a proximal end pivotedly coupled to a lower expansion member plate having a cylindrical bar positioned along a distal end slidably engaging said second plate expansion slots;
• a screw having a screw head rotatably attached to a wall of said housing having a threaded shank inserted in a threaded aperture formed between said distal ends of said upper and lower expansion member plates;
• wherein rotation of said screw will draw said distal ends of said upper and lower expansion member plates toward the screw head whereby said cylindrical bars slide within said first and second plate slots to traverse said first plate and said second plate between an expanded position and a non-expanded position.