Patent ID: 8858598

Claim:
A device for implantation in a vertebral column, comprising: a body comprising a support portion extending laterally along a lateral axis between first and second end portions; wherein at least a portion of the first end portion is moveable from a first position to a second position, wherein in the second position, the portion of the first end portion that is moveable extends beyond the support portion in a direction perpendicular to the lateral axis to a greater extent than in the first position, wherein in the first position the first end portion includes an outer surface and an inner surface that faces a central longitudinal axis of the body; wherein the device is configured and dimensioned to be inserted in a position between adjacent spinous processes of the vertebral column, wherein in such a predetermined position, the moveable portion of the front end is moveable from the first position to the second position; wherein when in the first position the first end portion comprises a ramp on at least a portion of the outer surface configured and dimensioned to engage and separate the adjacent spinous processes when inserted; and when in the second position the first end portion comprises a sidewall on at least a portion of the inner surface, wherein the sidewall is configured and dimensioned to engage a lateral surface of the adjacent spinous processes to limit lateral movement with respect thereto, wherein when in the first position, the sidewall of the first end portion faces the lateral axis of the body and in the second position, the sidewall of the first end portion faces the second end portion.