393 results about "Spinal cage" patented technology

A lateral expandable interbody fusion cage expands laterally between two vertebrae to promote fusion between the two vertebrae. The cage includes an outer cage and at least one inner cage, with optional flanges and spikes.

A spinal interbody fusion cage has a body whose anterior / posterior profile may be varied through angular positioning of one or more articulating segments of the body without changing the superior / inferior height of the body. The present spinal interbody fusion cage has N segments or sections wherein at least one segment is articulated relative to another segment via a connection point, pivot or pivot structure such that the anterior / posterior profile is variable through angular positioning of one or more of the segments. The pivot structure may be configured so as to allow unidirectional movement between the connecting segments thereby allowing articulation in one plane or to allow omni-directional movement between the connecting segments thereby allowing articulation in multiple planes. The various forms of the present interbody fusion cage include superior and inferior sides or bone abutment surfaces that have serrations, teeth or similar functioning structures (teeth). The teeth extend between the anterior end and the posterior end. The teeth may take different shapes but are configured to allow insertion of the spinal interbody fusion cage in an anterior-first manner while preventing and / or inhibiting the spinal interbody fusion cage from backing out posteriorly.

An interbody fusion cage having a generally symmetric, annular cage body surrounding a central void extending from a lower surface to an upper surface in which to retain graft material in contact with adjacent vertebra. A lateral channel extending into each half from the cage perimeter contains a worm drive screw. One or more longitudinal channels extending from the upper surface to the lower surface intersect each lateral channel and house a pin which is provided with a series of helically cut worm gear teeth on its external surface for engaging the worm drive screw. The pins are simultaneously externally threaded and engaged to the cooperatively threaded internal surface of the longitudinal channel such that rotation of the drive screw by the surgeon after implantation causes the pins to rotate with the longitudinal channel and advance into the adjacent bone.

Methods and devices are disclosed for treating the vertebral column. An implant for treating the spine is provided comprising at least two articulations between the spacer and the bone facing surface of the fixation plate. Another implant for treating the spine is also provided, comprising two or more fixation plates attached to a spacer with two or more articulations, wherein the fixation plates are independently movable.