A metal locking structure for orthopedic implants

Abstract

The application discloses a metal locking structure for orthopedic implant, and belongs to the technical field of orthopedic instruments, which comprises a bone plate body and a locking screw, the bone plate body comprises a transverse fixing section and a longitudinal supporting section, two first locking screw holes are formed in the transverse fixing section, four first locking screw holes are formed in the longitudinal supporting section, a fixing nut is arranged in each first locking screw hole, and a locking screw for locking and fastening is arranged in each fixing nut. The fixing nut is additionally arranged between the bone plate body and the locking screw, and the fixing nut is detachably arranged on the bone plate body, so that single-stage thread locking between the locking screw and the bone plate body can be changed, and the bone plate body and the locking screw can be optimally taken out from the bone of a patient.

Description

Technical Field

[0001] This application relates to the field of orthopedic devices, and more specifically, to a metal locking structure for orthopedic implants. Background Technology

[0002] Locking plates are the mainstream metallic internal fixation implants in clinical orthopedics. They mainly consist of a metal plate and multiple locking screws. The plate is prefabricated according to the corresponding bone anatomy, with internally threaded locking holes on the plate surface and matching external threads on the screws' outer walls. During surgery, the plate is fitted to the fracture surface, and the screws are screwed into the bone and locked into the plate's threaded holes. The rigidity of the plate supports and restrains the fracture ends, resisting bending and torsional loads from limb movement, maintaining positional stability after fracture reduction, isolating external forces, creating stable conditions for callus growth, and promoting fracture healing.

[0003] The existing metal locking structure has certain shortcomings in clinical use. One of these shortcomings is screw thread stripping and locking. Screw thread stripping and locking refers to the screw getting stuck due to broken internal or external threads. The screw is firmly fixed to the bone plate. When the fracture heals and the internal fixation needs to be removed, the standard screw removal tool cannot engage and unscrew the screw. This is a common and difficult problem in orthopedic internal fixation removal surgery, which restricts the implementation of routine removal surgery. Summary of the Invention

[0004] To address the problem of thread stripping and locking of locking screws in bone plate implants, this application provides a metal locking structure for orthopedic implants, employing the following technical solution. A metal locking structure for orthopedic implants includes a bone plate body and locking screws. The bone plate body includes a transverse fixing section and a longitudinal support section. The transverse fixing section has two first locking screw holes, and the longitudinal support section has four first locking screw holes. A fixing nut is provided in each of the first locking screw holes, and a locking screw for locking and securing is provided in each fixing nut.

[0005] Furthermore, the transverse fixing section and the longitudinal support section are integrally formed.

[0006] Furthermore, the fixing nut is cylindrical, and the outer wall of the fixing nut is provided with external threads.

[0007] Furthermore, one end of the fixing nut has a concave hexagonal segment, and the other end of the fixing nut has a second locking screw hole that communicates with the hexagonal segment. The fixing nut is compatible with the first locking screw hole.

[0008] Furthermore, the second locking screw hole and the locking screw are fitted together.

[0009] In summary, this application includes at least one of the following beneficial technical effects:

[0010] The present invention adds a fixing nut between the bone plate body and the locking screw. The fixing nut is detachably installed on the bone plate body, which changes the single-stage thread locking between the locking screw and the bone plate body, and can optimize the removal of the bone plate body and the locking screw from the patient's bone. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a metal locking structure for orthopedic implantation according to this application;

[0012] Figure 2 This is a schematic diagram showing the position and structure of the locking screw in this application;

[0013] Figure 3 This is a structural schematic diagram of the transverse fixing section of this application;

[0014] Figure 4 This is a schematic diagram of the structure of the fixing nut of this application.

[0015] The following are the labels in the diagram: 1. Bone plate body; 11. Lateral fixing section; 12. Longitudinal support section; 2. First locking screw hole; 3. Locking screw; 4. Fixing nut; 41. Hexagonal section; 42. Second locking screw hole. Detailed Implementation

[0016] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0017] In the description of this application, it should be noted that the terms "upper and lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and for 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 application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0019] Example:

[0020] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0021] This application discloses a metal locking structure for orthopedic implants. Please refer to [link / reference]. Figure 1-4 A metal locking structure for orthopedic implantation includes a bone plate body 1 and locking screws 3. The bone plate body 1 includes a transverse fixing section 11 and a longitudinal support section 12. The transverse fixing section 11 has two first locking screw holes 2, and the longitudinal support section 12 has four first locking screw holes 2. Each first locking screw hole 2 is provided with a fixing nut 4, and each fixing nut 4 is provided with a locking screw 3 for locking and fastening. When the locking screw 3 and the fixing nut 4 become locked during later removal of the implant, one end of a hexagonal wrench is placed in the hexagonal section 41 on the fixing nut 4, and rotating the hexagonal wrench allows the fixing nut 4 to be slowly turned out from the first locking screw hole 2, thus increasing functionality.

[0022] See Figure 1 and Figure 3 The transverse fixing section 11 and the longitudinal support section 12 are integrally formed.

[0023] See Figure 1 and Figure 4 The fixing nut 4 is cylindrical, and its outer wall is provided with external threads. One end of the fixing nut 4 has a concave hexagonal segment 41, and the other end of the fixing nut 4 has a second locking screw hole 42 that communicates with the hexagonal segment 41. The fixing nut 4 and the first locking screw hole 2 are compatible. When the locking screw 3 and the fixing nut 4 become locked during the removal of the nail, one end of the hexagonal wrench is placed in the hexagonal segment 41 on the fixing nut 4, and rotating the hexagonal wrench can make the fixing nut 4 slowly turn out from the first locking screw hole 2, which increases the functionality.

[0024] See Figure 1 and Figure 2 The second locking screw hole 42 is fitted with the locking screw 3 for installation.

[0025] The implementation principle of a metal locking structure for orthopedic implants in this application embodiment is as follows:

[0026] This invention discloses a metal locking structure for orthopedic implantation. During the surgical implantation stage, a hex wrench is used to pre-lock the fixing nut 4 in the first locking screw hole 2. The locking screw 3 enters the patient's bone through the second locking screw hole 42 on the fixing nut 4. The end cap of the locking screw 3 is placed in the hexagonal segment 41 inside the fixing nut 4, thus completing the locking and fixation of the bone plate body 1. If the locking screw 3 becomes locked during the later removal of the screw, one end of the hex wrench is placed in the hexagonal segment 41 on the fixing nut 4. Rotating the hex wrench allows the fixing nut 4 to be slowly turned out from the first locking screw hole 2, increasing functionality.

[0027] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A metal locking structure for orthopedic implantation, comprising a bone plate body (1) and a locking screw (3), wherein the bone plate body (1) comprises a transverse fixing section (11) and a longitudinal supporting section (12), characterized in that: Two first locking screw holes (2) are provided on the transverse fixing section (11), and four first locking screw holes (2) are provided on the longitudinal support section (12). A fixing nut (4) is provided in each of the first locking screw holes (2), and a locking screw (3) for locking is provided in each of the fixing nuts (4).

2. The metal locking structure for orthopedic implants according to claim 1, characterized in that: The transverse fixing section (11) and the longitudinal support section (12) are integrally formed.

3. The metal locking structure for orthopedic implants according to claim 2, characterized in that: The fixing nut (4) is columnar, and the outer wall of the fixing nut (4) is provided with external threads.

4. The metal locking structure for orthopedic implants according to claim 1, characterized in that: One end of the fixing nut (4) has a concave hexagonal segment (41), and the other end of the fixing nut (4) has a second locking screw hole (42) that communicates with the hexagonal segment (41). The fixing nut (4) is compatible with the first locking screw hole (2).

5. A metal locking structure for orthopedic implants according to claim 4, characterized in that: The second locking screw hole (42) is fitted with the locking screw (3).

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