Abstract: The invention relates to an osteosynthesis device with a bone plate and with at least one bone screw, wherein the bone plate has at least one through-hole with a conical inner thread formed at least in part in the through-hole. Moreover, the bone screw has a screw shank and also a screw head with a conical thread, with the possibility of forming a connection at a variable and stable angle between bone screw and bone plate by receiving the screw head with conical outer thread in the respective through-hole of the bone plate. According to the invention, the thread in the screw head has a first portion A with a first conicity and a second portion B with a second conicity, wherein a zone of discontinuity with respect to the conicity is present between the first portion A and the second portion B.

Abstract: The invention relates to an osteosynthesis device with a bone plate and with at least one bone screw, wherein the bone plate has at least one through-hole with a conical inner thread formed at least in part in the through-hole. Moreover, the bone screw has a screw shank and also a screw head with a conical thread, with the possibility of forming a connection at a variable and stable angle between bone screw and bone plate by receiving the screw head with conical outer thread in the respective through-hole of the bone plate. According to the invention, the thread in the screw head has a first portion A with a first conicity and a second portion B with a second conicity, wherein a zone of discontinuity with respect to the conicity is present between the first portion A and the second portion B.

Abstract: The invention relates to a small fragment humeral head plate which is used to fix, in a stable manner, bone fracture fragments to the humeral head and shaft which is near to the body, including an elongate plate part which is sheet-shaped, in addition to an anatomically shaped head part which is attached thereto and bores which are arranged in the plate part and in the head part, said bores having a conical-shaped thread which is used to receive bone screws which comprise, respectively, a screw head with a complementary conical thread, such that an angle-stable position is produced when screwing. According to the invention, a symmetrically distributed group of bores are embodied in the head part, wherein the axis of symmetry coincides with the longitudinal axis of the plate. The first, external bores on the head part are oriented in relation to each other at an angle of between, approximately 12 degrees-17 degrees, preferably 15 degrees.

Abstract: The invention relates to an osteosynthesis plate, particularly a plate for the head of the radius or humerus, provided with a plurality of bore holes for receiving bone screws, wherein at least some of the bore holes are provided with an inner thread and/or at least one continuous longitudinal bore hole is arranged in the plate, also having a conical shape extending over the longitudinal and/or transversal axis thereof. According to the invention, at least some of the bore holes also have a conical hollow space for receiving bone screws with both a head thread and a spherical head in the area near the bone. The thread section and hollow area section are disposed concentrically above or inside each other. The thread section can be embodied in such a way that it forms a conical thread.