| 摘要 |
<p>A bone screw, such as a pedicle screw, comprises en elongate structure having a head, an anchoring portion or tip distal from the head, and an open, helical body extending there- between. In one embodiment, the invention provides a screw having an anchoring portion, which engages bone and which includes a means for engaging a driver or the like whereby the screw is driven into the bone by the anchoring portion. A method of driving a screw is also provided.</p> |
