摘要 |
The bone plate proposed has several conical holes which taper towards the surface in contact with the bone and two screws designed to anchor the plate in place. Each of the screws has a conical head, with a patterned curved surface, shaped to fit into the conical holes in the plate, plus a threaded shank designed to anchor the screw in the bone. The patterned curved surface of the screw head is harder than the material of which the plate is made in the vicinity of the holes. |