# US 2018/0021071 A1 · Bone plate and surgical kit for fixing bone fragments > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0021071 A1 - Document ID: US20180021071A1 - Status: Published application - Kind: A1 - Application number: 15/546,351 - Filed: 2015-02-26 - Published: 2018-01-25 - Earliest claimed: 2015-02-26 - Assignees: Medartis Holding AG - Applicants: Medartis Holding AG - Inventors: Dirk THIEL; Alexander ZUBERER - Web page: https://patentgrep.com/patent/US20180021071A1 ## CPC - A61B 17/8014: {the extension or compression force being caused by interaction of the plate hole and the screws} - A61B 17/8009: {the plate having a ratchet} - A61B 17/8052: {immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded} - A61B 17/8605: {Heads, i.e. proximal ends projecting from bone} - A61B 17/8061: {specially adapted for particular bones (A61B17/70 and A61B17/74 take precedence)} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A bone plate (1) with at least one receiving opening (2) for a bone screw (3) with a screw head (4), wherein the receiving opening (2) has a compression area (5) with a compression contour (6) and a blocking area (7) with a blocking contour (8). The compression contour is designed such that rotation of the bone screw in its one screwing-in direction (E) causes lateral movement of the bone screw toward the blocking area (7). The compression contour (6) is designed as an engagement contour (6), such that lateral movement is generated by engagement between the engagement contour (6) and a mating contour (9) on the screw head or tool. A surgical kit containing at least one such bone plate (1) and at least one bone screw with a screw head (4), which bone screw is insertable into the receiving openings of the bone plate (1) is also disclosed. ## Claims ### Claim at position 1 1-22. (canceled) ### Claim 23 A bone plate with at least one receiving opening for a bone screw with a screw head, wherein the receiving opening includes a compression region with a compression contour and a blocking region with a blocking contour, the compression contour is realized and arranged in such a manner that rotation of the bone screw in a screwing-in direction brings about a lateral movement of the bone screw in the direction of the blocking region, and the compression contour is realized as an engagement contour such that lateral movement is generatable, at least in part, by engagement between the engagement contour and a counter contour of the screw head. ### Claim 24 (depends on 23) The bone plate according to claim 23, wherein the lateral movement is generatable at least in part by rolling the screw head along the engagement contour. ### Claim 25 (depends on 23) The bone plate according to claim 23, wherein the engagement contour comprises at least one guiding surface, along which a bottom surface of the screw head is guidable, during rotation of the bone screw in its screwing-in direction. ### Claim 26 (depends on 25) The bone plate according to claim 25, wherein during rotation of the bone screw in its screwing-in direction, a bottom surface of a blocking projection which is arranged radially on the screw head is guidable along the at least one guiding surface. ### Claim 27 (depends on 23) The bone plate according to claim 23, wherein the engagement contour comprises at least one rolling region on which a blocking projection, which is arranged radially on the screw head, is rollable during at least part of the lateral movement. ### Claim 28 (depends on 27) The bone plate according to claim 27, wherein the rolling region includes a bottom surface and a side surface, which extends between the top surface and the bottom surface, the blocking projection, which is arranged radially on the screw head, is rollable on said side surface during at least part of the lateral movement. ### Claim 29 (depends on 23) The bone plate according to claim 23, wherein the blocking contour is realized in such a manner that the bone screw is blockable, at various angles, relative to the bone plate. ### Claim 30 (depends on 23) The bone plate according to claim 23, wherein the blocking contour comprises at least one recess which widens outward in a wedge-shaped manner away from a main axis of the blocking region in order to be able to receive and block a blocking projection which is arranged radially on the screw head. ### Claim 31 (depends on 30) The bone plate according to claim 30, wherein the at least one recess of the blocking contour is arranged such that the at least one recess extends around in a direction perpendicular to the main axis of the blocking region. ### Claim 32 (depends on 30) The bone plate according to claim 30, wherein the blocking contour comprises at least two recesses which widens outward, in each case, in a wedge-shaped manner away from the main axis of the blocking region. ### Claim 33 (depends on 25) The bone plate according to claim 25, wherein the counter contour is formed by at least one of the blocking projections and/or at least one of the recesses which are arranged between the blocking projections. ### Claim 34 (depends on 23) A surgical kit including: at least one bone plate according to claim 23, and at least one bone screw with a screw head which is insertable into at least one of the receiving openings of the bone plate. ### Claim 35 (depends on 34) The surgical kit according to claim 34, wherein the screw head is provided with a blocking projection, which is arranged radially on the screw head and has a circumferential outside surface which extends substantially in the direction of a longitudinal axis of the bone screw and comprises at least one clamping surface which, when viewed in an azimuth plane perpendicular to the longitudinal axis, widens outward in a wedge-shaped manner away from the longitudinal axis in order to be able to block the screw head by way of the blocking contour. ### Claim 36 (depends on 34) The surgical kit according to claim 34, wherein the circumferential outside surface of the screw head comprises at least three clamping surfaces which are distributed equally along their circumference and widen outward, in each case, in a wedge-shaped manner away from the longitudinal axis of the bone screw. ### Claim 37 (depends on 34) The surgical kit according to claim 34, wherein at least one bone plate and the guiding surface is matched to the bone screw in such a manner that the bottom surface of the screw head is guidable along the guiding surface during the screwing-in of the bone screw. ### Claim 38 (depends on 37) The surgical kit according to claim 37, wherein the guiding surface is matched to a bottom surface of the screw head and to a thread pitch of a shank of the bone screw in such a manner that a bottom surface of a blocking projection, which is arranged radially on the screw head, is guidable along the guiding surface during the screwing-in of the bone screw. ### Claim 39 (depends on 34) The surgical kit according to claim 34, wherein at least one bone plate and the rolling region of said bone plate is matched in such a manner to the bone screw that the screw head is rollable on the rolling region during the screwing-in of the bone screw. ### Claim 40 (depends on 39) The surgical kit according to claim 39, wherein the side surface of the rolling region of said bone plate is matched in such a manner to a counter contour which is arranged on the screw head and to a thread pitch of a shank of the bone screw that the screw head is rollable on the side surface of the rolling region during the screwing-in of the bone screw. ### Claim 41 (depends on 23) A method for fixing a bone plate according to claim 23 to two bone fragments to be joined, the method including: a) fixing the bone plate to a first bone fragment by a first bone screw, b) inserting a second bone screw with a screw head through the compression region of the receiving opening onto a second bone fragment, c) rotating the second bone screws in a screwing-in direction, as a result of which a lateral movement of the second bone screw is brought about in the direction of the blocking region and the lateral movement is generated, at least in part, by engagement between the engagement contour and a counter contour on the screw head. ### Claim 42 (depends on 41) The method according to claim 41, further including: d) blocking the second bone screw in the blocking contour.