Bone screw

Details Bone screw Bone screw

A - Human Necessities

61

B

128/41

A61B 17/58 (2006.01) A61B 17/74 (2006.01)

Patent

CA 1294501

Abstract The bone screw for use with a connecting member for connecting a bone portion with the connecting member. The bone screw includes an elongate shank having a longitudinal central axis. A first externally threaded portion receives a nut for attaching the connecting member to the bone screw. A second externally threaded portion engages a surface defining an opening in the bone portion to attach the bone screw to the bone portion. A cylindrical body portion is located on the shank intermediate the first and second externally threaded portions. The body portion engages a portion of the surface defining the opening in the bone portion to restrict movement of the bone screw relative to the bone portion in a direction transverse to the longitudinal central axis of the shank. The body portion blocks effluence from the opening in the one bone portion. A seat portion having a surface located on the body portion adjacent the first externally threaded portion engages the connecting member to establish the axial location of the connecting member along the bone screw.

569173

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