Patent ID: 7608097
Filing Date: 2009-10-27
Classification: A61B

Abstract:
1. A bone screw for entering an area of a host's bone matrix to mechanically strengthen the matrix and radially deliver tissue reinforcement material, the bone screw comprising: a shaft comprising a first external threaded portion, a distal end, a middle portion, a proximal end, a circumferential outer shaft wall, and a longitudinal axis extending from the distal end of the shaft to the proximal end of the shaft; a lumen defined by the outer shaft wall and extending from the proximal end of the shaft toward the distal end of the shaft; at least one directional channel extending through the outer shaft wall from said lumen to at least one aperture on an outer surface of the shaft to deliver tissue reinforcement material from the bone screw; and a sleeve comprising a closed distal end and sized to be slideably positionable inside said lumen to selectively block at least one of the channels during delivery of tissue reinforcement material; wherein the proximal end of the shaft and the lumen are configured to receive at least a portion of the sleeve.