Hook-shaped fixing steel plate for ulna coracoid process fracture

Abstract

The utility model discloses a hook-shaped fixing steel plate for ulna coracoid process fracture. The device comprises a main plate, a protruding attaching part and a hook part which are integrally arranged and are integrally in a hook shape. The hook part is matched with the upper surface of the ulna coracoid process in shape, and the outer edge of the hook part is in a blade shape; the protuberance fitting part is matched with the anatomical form of the coronal process lateral column, and the main plate is matched with the anatomical form of the lower end part of the coronal process lateral column; a plurality of screw holes are formed in the protruding attaching part and the main plate. The fixing effect on small fracture blocks is optimized, the postoperative effect is guaranteed, and the living quality of a patient is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a hook-shaped fixation plate for fractures of the coronoid process of the ulna. Background Technology

[0002] The coronoid process of the ulna is a bony proximal end of the ulna, part of the ulnar trochlear articular surface, and participates in the formation of the humeroulnar joint. The joint capsule anterior to the elbow joint, the anterior bundle of the medial collateral ligament of the elbow, and the insertion of the brachialis muscle all attach to the coronoid process. The coronoid process is an indispensable component in controlling the hinge connection and rotational stability of the trochlear-olecranon joint of the elbow joint.

[0003] Fractures of the coronoid process of the ulna rarely occur alone; they are usually accompanied by injuries to other bony structures or soft tissues around the elbow joint, leading to elbow dislocation. Improper treatment can result in severe elbow dysfunction. Surgical fixation is generally the primary treatment for coronoid process fractures of the ulna.

[0004] However, coronoid process fractures are often small and fragmented, with complex surrounding anatomical structures. Even for experienced clinicians, fixation remains a significant challenge. Failure to fix the fracture can lead to complications such as elbow instability, arthritis, and stiffness. Concerns about the accuracy and stability of coronoid process fracture repair often prevent attending physicians from initiating early rehabilitation training after elbow fracture-dislocation surgery, resulting in delayed postoperative functional training and complications such as joint stiffness and myositis ossificans. Therefore, the development, design, and use of a dedicated coronoid process fixation system are crucial for prognosis.

[0005] In the existing technical solutions, the lateral column plate of the coronoid process of the ulna, authorized by CN 204683748 U, fixes the fracture fragments through the head and plate body. However, for small and fragmented fracture fragments, the plate can only fix the position of the fracture fragments in one direction, resulting in poor fixation. In this case, the fracture fragments are very easy to slide in the other direction, leading to fracture fixation failure, poor postoperative results, and affecting the patient's quality of life. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and propose a hook-shaped fixation plate for coronoid process fractures of the ulna, which can optimize the fixation effect on small fracture fragments, ensure postoperative results, and improve the patient's quality of life.

[0007] To achieve the above objectives, the present invention proposes the following technical solution:

[0008] A hook-shaped fixation plate for coronoid process fractures of the ulna includes an integrally formed main plate, a protruding fitting portion, and a hook portion, which are generally hook-shaped. The hook portion conforms to the shape of the upper surface of the coronoid process of the ulna, and the outer edge of the hook portion is blade-shaped. The protruding fitting portion matches the anatomical shape of the lateral column of the coronoid process, and the main plate matches the anatomical shape of the lower end of the lateral column of the coronoid process. The protruding fitting portion and the main plate are provided with multiple screw holes.

[0009] Preferably, the hook portion is W-shaped, forming three claw portions, with transition arcs between the claw portions to reduce stress concentration and enhance the structural stability of the steel plate.

[0010] Preferably, the protruding fitting part is provided with a waist-shaped screw hole to form a pressure hole, which applies pressure to the steel plate during the tightening of the screw, thereby further optimizing the fixation effect of the steel plate on the fracture fragments.

[0011] Preferably, there are three or more screw holes, with one screw hole on the protruding fitting part and two or more screw holes on the motherboard.

[0012] In practical use, the hook-shaped fixation plate is hooked onto the coronoid process of the ulna. The protruding fitting part and the hook part fix the fracture fragment in place. The screw is passed through the screw hole and screwed into the ulna to fix the position of the fracture fragment.

[0013] The fabrication of this hook-shaped fixation plate begins with detailed measurements of the coronoid process of the ulna using advanced medical imaging techniques such as CT scans and 3D reconstruction. Based on these imaging measurements, computer-aided design software is used to draw the shape of the bone plate. The curvature of the fixation plate is determined to better conform to the anatomical morphology of the anteromedial column of the coronoid process of the ulna. The coverage area of ​​the hook is determined so that it is slightly larger than the upper surface of the fracture fragment, without contacting other bone, thus not affecting the patient's postoperative mobility. Medical-grade titanium alloy or iatrogenic steel plates are selected for the hook-shaped fixation plate. These materials possess good biocompatibility, strength, and corrosion resistance, meeting the requirements of internal fixation. Finally, precision machining techniques are used to fabricate the hook-shaped fixation plate. The above describes existing technology that can be directly used by those skilled in the art.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention achieves multi-directional fixation of fracture fragments by setting a main board, a protruding fitting part, and a hook part to fit against the coronoid process of the ulna, and screwing in screws, thus optimizing the fixation effect on small fracture fragments.

[0016] This invention, by setting a hook portion that adapts to the shape of the upper surface of the coronoid process of the ulna, can further optimize the fixation effect on small fracture fragments.

[0017] By adopting the above solution, this invention can optimize the fixation effect on small bone fragments, ensure postoperative results, and improve the patient's quality of life. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the first embodiment.

[0020] Figure 2 This is a schematic diagram of the structure of the second embodiment.

[0021] Figure 3 This is a structural schematic diagram of the third embodiment.

[0022] Figure 4 This is a schematic diagram illustrating the fixation effect of this utility model on fracture fragments of the coronoid process of the ulna.

[0023] In the diagram, 1-hook-shaped fixation plate, 2-ulna, 21-coronal process, 22-fracture fragment, 3-screw; 11-main plate, 12-protrusion fitting part, 13-hook part, 131-claw part, 132-transition arc, 14-screw hole, 15-waist-shaped screw hole. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] First embodiment:

[0029] like Figure 1 As shown, a hook-shaped fixation plate for coronoid process fractures of the ulna includes an integrally formed main plate 11, a protruding fitting portion 12, and a hook portion 13, which are generally hook-shaped. The hook portion 13 is adapted to the shape of the upper surface of the coronoid process 21 of the ulna, and the outer edge of the hook portion 13 is blade-shaped. The protruding fitting portion 12 matches the anatomical shape of the lateral column of the coronoid process 21, and the main plate 11 matches the anatomical shape of the lower end of the lateral column of the coronoid process 21. The protruding fitting portion 212 and the main plate 11 are provided with a plurality of screw holes 14.

[0030] The screw holes 14 are provided in three or more, the protruding fitting part 12 is provided with one screw hole, and the main board 11 is provided with two or more screw holes.

[0031] like Figure 4 As shown, in specific use, the hook-shaped fixation plate is hooked onto the coronal process 21 of the ulna 2. The protrusion fitting part 12 and the hook part 13 fix the fracture fragment 22 in place. The screw 3 passes through the screw hole 14 and is screwed into the ulna to fix the position of the fracture fragment 22.

[0032] Second embodiment:

[0033] like Figure 2As shown, a hook-shaped fixation plate for coronoid process fractures of the ulna includes an integrally formed main plate 11, a protruding fitting portion 12, and a hook portion 13, which are generally hook-shaped. The hook portion 13 is adapted to the shape of the upper surface of the coronoid process 21 of the ulna, and the outer edge of the hook portion 13 is blade-shaped. The protruding fitting portion 12 matches the anatomical shape of the lateral column of the coronoid process 21, and the main plate 11 matches the anatomical shape of the lower end of the lateral column of the coronoid process 21. The protruding fitting portion 212 and the main plate 11 are provided with a plurality of screw holes 14.

[0034] The hook portion 13 is W-shaped, forming three claw portions 131. The claw portions 131 are connected by a transition arc 132 to reduce stress concentration and enhance the structural stability of the steel plate.

[0035] Third embodiment:

[0036] like Figure 3 As shown, a hook-shaped fixation plate for coronoid process fractures of the ulna includes an integrally formed main plate 11, a protruding fitting portion 12, and a hook portion 13, which are generally hook-shaped. The hook portion 13 is adapted to the shape of the upper surface of the coronoid process 21 of the ulna, and the outer edge of the hook portion 13 is blade-shaped. The protruding fitting portion 12 matches the anatomical shape of the lateral column of the coronoid process 21, and the main plate 11 matches the anatomical shape of the lower end of the lateral column of the coronoid process 21. The protruding fitting portion 212 and the main plate 11 are provided with a plurality of screw holes 14.

[0037] The protruding fitting part 12 is provided with a waist-shaped screw hole 15, forming a pressure hole, which applies pressure to the steel plate during the tightening of the screw 3, further optimizing the fixation effect of the steel plate on the fracture fragment 22.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hook fixation plate for a fracture of the coronoid process of the ulna, characterized in that: The device comprises a main plate, a protruding fitting part and a hook part which are integrally arranged, and the whole is in the shape of a hook, the hook part is adapted to the shape of the upper surface of the coronoid process of ulna, and the outer edge of the hook part is in the shape of a blade; the protruding fitting part is matched with the anatomical form of the lateral column of the coronoid process, the main plate is matched with the anatomical form of the lower end part of the lateral column of the coronoid process; a plurality of screw holes are arranged on the protruding fitting part and the main plate.

2. A hook fixation plate for fracture of coronoid process of ulna as claimed in claim 1 wherein: The hook part is in the shape of W, and three claw parts are formed, and the claw parts are connected through transition arcs.

3. A hook fixation plate for fracture of coronoid process of ulna as claimed in claim 1 wherein: A waist-shaped screw hole is arranged on the protruding fitting part.

4. A hook fixation plate for fracture of coronoid process of ulna as claimed in claim 1 wherein: More than three screw holes are arranged, one screw hole is arranged on the protruding fitting part, and more than two screw holes are arranged on the main plate.

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