Patent ID: 6884244

Claim:
A closure for use in conjunction with a medical implant that is sized and shaped to operably close a channel between two spaced arms with each of said arms having an inward threaded surface; said closure comprising: a) a body having an axis of rotation and a threaded cylindrical shaped radially outward surface with threads sized and shaped to be threadably mated with the threaded surfaces of the implant arms; b) a break-off driving head having a first external cross section associated therewith perpendicular to the axis of rotation; said driving head having a radially outward driving surface that is polyhedral in shape and adapted to receive a driving tool for torquing said closure; said driving head being adapted to rotate and torque said body in said implant until a preselected torque occurs at which time said break-off head breaks from said body; and c) a removal head having a polyhedral shape with radially outward facing engagement surfaces adapted to engage a removal tool; said removal head being located initially between said threaded cylindrical shaped radially outward surface of said body and said driving head; said removal head having a second external cross section associated therewith perpendicular to the axis of rotation with said second cross section being different from said first cross section and being adapted to receive a removal tool for removal of said closure; said removal head outward facing surfaces being sized and shaped so as to not receive and be driven by a driving tool engaging said driving head; and said removal head second external cross section being different in size and share from an external cross section of said body and having no threads thereon.