Patent ID: 6755835
Filing Date: 2004-06-29
Classification: A61B

Abstract:
A bone screw comprising:a screw body which comprises flow-through means for bone cement that is used for the production of a cement jacket around the bone screw, and an external thread on said screw body, said flow-through means comprising: at least one longitudinal recess formed in the screw body extending transversely relative to at least one of a radial direction and a peripheral direction, and said at least one longitudinal recess extending over a plurality of turns of the external thread in a longitudinal direction, and a hollow channel extending longitudinally within the screw body from a rear section of said screw body through a central section of said screw body and into at least a portion of a frontal section of said screw body and said at least one longitudinal recess being connected to the hollow channel along at least a portion of said central section of the screw body; wherein said bone cement is enabled to flow into said at least one longitudinal recess from said hollow channel and into intermediary spaces between turns of the external thread to produce said cement jacket substantially around said screw body.