Patent ID: 8574268
Filing Date: 2013-11-05
Classification: A61B,B23G

Abstract:
1. A bone plate system for securing a bone plate to bone, the system comprising: a bone plate having an upper surface, a lower bone-engaging surface, and a hole extending therethrough from the upper surface to the lower surface, the hole having an inner surface that defines a circumference of the hole, the hole defining a central axis and being configured and dimensioned to receive a bone screw therein, wherein: the bone plate has a plurality of discrete columns of protrusions arranged on the inner surface of the hole and spaced apart from one another around the circumference, each column extending in a direction from the upper surface to the lower surface; and the protrusions on the columns being configured, dimensioned and spaced apart from one another around the circumference by a distance selected to permit the protrusions to engage a thread on a head of a bone screw inserted into the hole to lock the bone screw at a selectable angle within a range of selectable angles forming a cone of angulation around the central axis of the hole.