Patent ID: 8034111

Claim:
An adjustable vertebral spacer comprising: a spacer body, said spacer body comprising a tubular body wall, a plurality of outer threads extending around said tubular body wall, a tubular space defined within said tubular body wall, a plurality of longitudinal guide slots cut through and downwardly extending from the topmost edge of said tubular body wall, a bottom endplate transversely located at a bottom side of said tubular body wall, a plurality of bottom protrusions downwardly protruding from said bottom endplate, and at least one bone-fusion hole cut through said bottom endplate in communication with the tubular space of said spacer body; an adjustment ring threaded onto said outer threads of said spacer body and rotatable to move vertically upwards and downwards along said spacer body; a movable member vertically movably inserted into the tubular space of said spacer body, said movable member comprising a tubular socket wall, a tubular space defined within said tubular socket wall, and a plurality of guide rods perpendicularly extended from the periphery of said tubular socket wall and respectively inserted through the longitudinal guide slots of said spacer body and supported on said adjustment ring for allowing said movable member to be moved with said adjustment ring vertically along said spacer body to a selected elevation through a rotation motion of said adjustment ring relative to said spacer body; a lock ring threaded onto said outer threads of said spacer body to lock said guide rods of said movable member to said adjustment ring; and a top endplate connected to said movable member above the tubular space of said movable member and tiltable relative to said movable member, said top endplate comprising a plurality of top protrusions upwardly protruding from said top endplate, and at least one bone-fusion hole cut through said top endplate in communication with the tubular space of said movable member.