Costs of Alternative Environmental Policy Instruments in the Presence of Industry Compensation Requirements

A suture anchor is described having a central shaft and at least one outwardly extending longitudinal rib. The ribs may have bone engaging elements such as threads or barbs on their outer surfaces. A bone boring tool having more than one set of sharpened cutting edges is described which creates a non-circular hole in bone approximating the anchor cross section geometry. The suture anchor is inserted into the shaped hole in bone and is rotated about its axis by the driver to engage the ribs with the bone.