A modular bone plate

Abstract

This utility model relates to the field of bone plate technology, and in particular to a modular bone plate, comprising a rod and a head. The modular bone plate of this utility model has a first end assembly groove and a second end assembly groove offset on both sides for front-to-back assembly, as well as a wedge-shaped recessed structure and a wedge-shaped protruding structure with a wedge-shaped concave-convex fit. These can be assembled to form bone plates of different sizes and structures, adaptable to different bone sites and patients, thus broadening its applicability. The front-to-back assembly grooves of the first and second ends ensure a stable and reliable connection between the head and rod of the bone plate in the width direction, while the wedge-shaped recessed structure and wedge-shaped protruding structure ensure a stable and reliable connection between the head and rod of the bone plate in the front-to-back direction.

Description

Technical Field

[0001] This utility model relates to the field of bone plate technology, and in particular to an assemblable bone plate. Background Technology

[0002] Existing standard bone plates are categorized into rib plates, radial plates, femoral plates, etc., depending on the location of the fracture. The radius is a bone in the arm, and a radial plate consists of a shaft and a head; each person's radius is different. During surgery, different sizes of radial plates are selected based on the length and shape of the fracture line. Different sizes of radial plates have different shaft lengths and different head shapes.

[0003] The problems with existing technologies are: too many specifications make it difficult for doctors to choose during surgery, increase surgical time, and also increase production costs and inventory pressure. In addition, too many specifications cannot fully cover individual differences in patients' anatomy.

[0004] Chinese patent document CN216628670 U discloses a splicing bone plate that achieves flexible combination of bone plate specifications through a detachable splicing structure of the rod and head, thereby reducing the overall number of specifications and improving adaptability.

[0005] However, in practical applications, this solution still suffers from insufficient structural strength at the joint between the rod and the head, affecting the stability of the bone plate under complex stress environments. Utility Model Content

[0006] The technical problem to be solved by this utility model is that the splicing parts of the existing spliced ​​bone plates have insufficient strength and poor stability under complex stress environments.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: an assemblable bone plate, including a rod and a head. A first end assembly groove is provided on the front or back side of the head end of the rod, and a second end assembly groove is provided at the end of the head to assemble with the first end assembly groove. Both the first and second end assembly grooves are arc-shaped grooves with an arc shape in the width direction. The inner end faces of the first and second end assembly grooves are wedge-shaped recessed structures. The end faces of the head end of the rod and the end face of the head are wedge-shaped protrusions that mate with the wedge-shaped recessed structures. The head end of the rod and the head are assembled into one piece through the first and second end assembly grooves, and the wedge-shaped protrusions of the rod and the head are embedded in the wedge-shaped recessed structures. The head end of the rod and the end of the head, which are assembled into one piece, are locked together in the front-to-back direction by locking screws or hollow locking studs.

[0008] In some embodiments, optionally, the rod and head have a plurality of bone screw holes.

[0009] In some embodiments, optionally, one of the first end assembly groove and the second end assembly groove is an arc-shaped groove that is thin on both sides and thick in the middle, and the other is an arc-shaped groove that is thick on both sides and thin in the middle.

[0010] In some embodiments, the hollow inner hole of the hollow locking stud is optionally a bone screw hole.

[0011] The beneficial effects of this utility model are:

[0012] (1) The present invention provides a type of assembleable bone plate with a first end assembly groove, a second end assembly groove, and a wedge-shaped concave structure and a wedge-shaped convex structure that are staggered on both sides for front-to-back assembly. It can be assembled with each other to form bone plates of different sizes and structures, which can be adapted to different bone parts and patients, and has a wider range of applications.

[0013] (2) The first end assembly groove and the second end assembly groove can ensure that the splicing structure between the head and the rod of the bone plate is stable and reliable in the width direction. The wedge-shaped concave structure and the wedge-shaped convex structure can ensure that the splicing structure between the head and the rod of the bone plate is stable and reliable in the front and rear directions.

[0014] (3) The splicing structure of this utility model has a more reasonable layout and a more compact size;

[0015] (4) The splicing structure is easy to process and has low requirements for processing accuracy. It can meet the processing accuracy requirements on general processing equipment, which greatly reduces the processing cost. It exhibits good mechanical properties and stability during use. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the head structure of Embodiment 1 of this utility model.

[0018] Figure 2 This is a schematic diagram of the rod portion of Embodiment 1 of this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0020] Figure 4 This is a partial cross-sectional view of the assembly part in the width direction of Embodiment 1 of this utility model.

[0021] Figure 5 This is a partial cross-sectional view along the length of the assembly part of Embodiment 1 of this utility model.

[0022] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0023] Figure 7 This is a partial cross-sectional view of the splicing part of Embodiment 3 of this utility model, which is locked by a hollow locking stud. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The illustrated modular bone plate includes a rod 11 and a head 10. A first end-assembly groove 2 is provided on the front or back side of the head end of the rod 11. A second end-assembly groove 3 is provided at the end of the head 10 to assemble with the first end-assembly groove 2. Both the first end-assembly groove 2 and the second end-assembly groove 3 are arc-shaped grooves in the width direction. The inner end faces of the first end-assembly groove 2 and the second end-assembly groove 3 are wedge-shaped recessed structures 7. The end faces of the head end of the rod 11 and the end face of the head 10 are both wedge-shaped protrusions 8 that mate with the wedge-shaped recesses 7. The head end of the rod 11 and the head 10 are assembled together as a single unit via the first end-assembly groove 2 and the second end-assembly groove 3. The wedge-shaped protrusions 8 of the rod 11 and the head 10 are embedded in the wedge-shaped recesses 7. The assembled head end of the rod 11 and the end of the head 10 are locked together in the front-back direction by locking screws 5.

[0027] The rod 11 and the head 10 have a plurality of bone screw holes 4.

[0028] In the first end assembly groove 2 and the second end assembly groove 3, one is an arc-shaped groove that is thin on both sides and thick in the middle, and the other is an arc-shaped groove that is thick on both sides and thin in the middle.

[0029] The rod 11 can be fitted with different adapter heads depending on the installation position. The head of this utility model can be in the shape of a straight line, a figure-7, a T, a Y, or a folded angle. In this embodiment, the head is T-shaped.

[0030] Example 2, as Figure 6 As shown, it is basically the same as in Example 1, except that when it is necessary to assemble a linear locking compression plate, it is only necessary to... Figure 1 The T-shaped head in the image has been replaced with a straight head.

[0031] Example 3, as Figure 7 As shown, it is basically the same as in Embodiment 1, except that the head end of the rod 11 and the end of the head 10, which are assembled as one piece, are locked together in the front-to-back direction by a hollow locking stud 6, and the hollow inner hole of the hollow locking stud 6 is a bone screw hole 4. This design allows bone screws to be installed at the splicing parts of the modular bone plate.

[0032] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A splintable bone plate comprising a stem portion (11) and a head portion (10), characterized in that: A first end-assembly groove (2) is provided on the front or back side of the head end of the rod (11), and a second end-assembly groove (3) is provided at the end of the head (10) to assemble with the first end-assembly groove (2). Both the first end-assembly groove (2) and the second end-assembly groove (3) are arc-shaped grooves with an arc shape in the width direction. The inner end faces of the first end-assembly groove (2) and the second end-assembly groove (3) are wedge-shaped recessed structures (7). The end faces of the head end of the rod (11) and the end of the head (10) are also provided with this feature. The end faces of the rod (11) are all wedge-shaped protrusions (8) that cooperate with the wedge-shaped concave structure (7). The head end and head (10) of the rod (11) are assembled into one piece through the first end assembly groove (2) and the second end assembly groove (3). The wedge-shaped protrusions (8) of the rod (11) and the head (10) are embedded in the wedge-shaped concave structure (7). The head end of the rod (11) and the end of the head (10) are locked together in the front-back direction by locking screws (5) or hollow locking studs (6).

2. The modular bone plate according to claim 1, characterized in that: The rod (11) and head (10) have a plurality of bone screw holes (4).

3. The modular bone plate according to claim 1, characterized in that: Of the first end assembly groove (2) and the second end assembly groove (3), one is an arc-shaped groove that is thin on both sides and thick in the middle, and the other is an arc-shaped groove that is thick on both sides and thin in the middle.

4. The assembleable bone plate according to claim 1, characterized in that: The hollow inner hole of the hollow locking stud is a bone nail hole (4).

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