Patent ID: 6730091
Filing Date: 2004-05-04
Classification: A61B

Abstract:
A blockable bone plate comprising:a plurality of plate members which are connected to each other via waist-like webs and lie on a plate plane in an unbent state; a bone screw hole in at least some plate members; one or more bone screws which can be introduced through the screw holes for securing the bone plate, wherein each bone screw has a screw head which is thickened in diameter, a blocking thread situated below the screw head, the blocking thread having a pitch angle, and a bone thread which extends at least partially over a screw shank, the screw shank having a smaller cross-sectional diameter than the screw head; and an engagement contour inside the screw hole for blocking of the bone plate by the blocking thread provided on the bone screw, wherein the engagement contour comprises contour valleys and adjacent contour peaks, which are arranged at least substantially horizontally and partially running peripherally on the wall of the screw hole, in relation to the plate plane, there is no orientation, as in the thread, between one contour valley and the next contour valley, and between one contour peak and the next contour peak, the valleys and peaks of the engagement contour do not extend at a pitch angle, and the blocking thread of the bone screw and the engagement contour of the screw hole are not complementary to each other.