Patent ID: 9603644
Date: 2017-03-28
CPC Classifications: A61B,A61F

Claim:
1. A bone screw, comprising: a shaft extending between a head of the bone screw and a tip of the bone screw, the shaft having a core diameter; a cannulated portion formed in the shaft; a plurality of threads extending above the core diameter; a fenestration in the shaft providing an opening between the cannulated portion and an outer surface of the shaft; wherein the fenestration forms a first fenestration surface on a first side of the opening and a second fenestration surface on an opposite side of the opening; and wherein the second fenestration surface terminates at the outer surface of the shaft forming an acute angle edge directed towards the head of the bone screw, and wherein the edge protrudes from the core diameter beyond the first fenestration surface in a direction away from the cannulated portion.