Patent 9339315 was granted and assigned to Stryker on May, 2016 by the United States Patent and Trademark Office.
A bone fastener for use in orthopedic surgery for fixing an implant to bone has a threaded or unthreaded shaft configured to engage bone and a head having a thread on an outer surface to engage the implant. The thread on the head of the fastener has a profile in cross section that includes peaks with a curved shape.