| http://www.w3.org/ns/prov#value | - A bone anchor as recited in claim 6, wherein the surface of the body axial opening, adjacent to the dividing wall includes at least one ridge formed therearound; and the clamping means is a plug formed to fit through the body proximal end and into said axial opening, said plug having a body with at least one ridge formed around its outer surface that is shaped to oppose a surface of said axial ope
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