Patent ID: 9005255
Filing Date: 2015-04-14
Classification: A61B

Abstract:
1. A plate and screw system which is capable of fixation of bone comprising a plate and a locking screw and a compression screw, the compression screw having a convexly rounded head having a diameter, the plate having a top surface opposing a bone facing surface in the z direction, and extending along a first length along a longitudinal axis and having a first end and a second end, and the plate including a compression screw housing which extends through the plate to form a pocket extending from the bone facing surface of the plate and defining a compression screw hole extending along a compression screw hole axis to define a compression screw angle of from 10° to 70° in the Z direction relative to the longitudinal axis of the plate and the compression screw housing including a ovoid opening in the top surface of the plate which opens to the pocket which has rear and side walls extending from the bone facing surface of the plate and away from the top surface of the plate and which define inside surfaces of the pocket and the inside surfaces of the pocket defining the ovoid opening at the plate top surface which opens into the pocket at an angle to form a groove that accommodates and guides the screw and a mating screw driver as the screw is screwed into a bone, the pocket having a bottom opening on the bottom of the plate, and that is smaller than the diameter of the compression screw head, the inside surfaces of the pocket being of a sufficient size to accommodate the entire screw head whereby the compression screw is captured in the pocket and can be positioned at a variable angle relative to the compression screw hole axis and the screw head does not project beyond the top surface of the plate, and the second end of the plate further includes a chamfer for insertion into bone.