Thoracolumbar spine posterior nail rod structure convenient to adjust

Abstract

The thoracolumbar posterior nail-rod structure comprises a first connecting rod, a second connecting rod, a nail block and a nail rod, adjusting seats are fixed to the two ends of the center of the first connecting rod, a sliding groove is formed in one side of each adjusting seat, a supporting rod is slidably connected to the interior of each sliding groove, and the nail rod is connected with the second connecting rod. Two sets of symmetrical nail holes are formed in the top surface of the supporting rod, a screw is arranged at one end of the top of the adjusting base, and the end, penetrating into the sliding groove, of the screw is clamped into the nail holes. Nail blocks are arranged at the two ends of the first connecting rod and the two ends of the second connecting rod and located at the outer ends of the adjusting base and the support, and nail rods are arranged at the bottoms of the nail blocks. According to the nail rod structure, the first connecting rod, the second connecting rod, the adjusting base, the screw, the telescopic rod, the support and other components are arranged and used in cooperation, so that when the nail rod structure is used, the width distance between the multiple sets of nail rods is conveniently adjusted, and the applicability of the nail rod structure is improved.

Description

Technical Field

[0001] This utility model relates to the field of posterior thoracic and lumbar spine screw and rod technology, specifically a posterior thoracic and lumbar spine screw and rod structure that is easy to adjust. Background Technology

[0002] Posterior thoracolumbar pedicle screws are internal fixation devices used in posterior thoracolumbar spine surgery. They are primarily used in cases of trauma (such as fractures), degeneration (such as vertebral instability due to intervertebral disc degeneration), or congenital malformations (such as spina bifida), providing strong internal fixation. They can restrict abnormal movement between vertebrae, preventing further damage or worsening of the deformity.

[0003] The existing posterior thoracic and lumbar pedicle screw-rod structure is inconvenient to adjust the width of the screws during use, which reduces the applicability of multiple screw-rod combinations. Utility Model Content

[0004] The purpose of this utility model is to provide a conveniently adjustable posterior thoracic and lumbar spine nail-rod structure. This utility model uses components such as a first connecting rod, a second connecting rod, an adjusting seat, screws, a telescopic rod, and a support to work together, thereby facilitating the adjustment of the width distance between multiple sets of nail rods during use, thus improving its applicability; and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A conveniently adjustable posterior thoracic and lumbar spine screw-rod structure includes a first connecting rod, a second connecting rod, a screw block, and a screw rod. The first connecting rod has an adjustment seat fixed at both ends of its center, and a sliding groove is provided on one side of the adjustment seat. A support rod is slidably connected inside the sliding groove. Two sets of symmetrical screw holes are provided on the top surface of the support rod. A screw is provided at one end of the top of the adjustment seat, and one end of the screw that passes through the sliding groove is engaged in the screw hole.

[0007] The first connecting rod and the second connecting rod are provided with nail blocks at both ends, and the nail blocks are located at the outer ends of the adjusting seat and the support, and the bottom of the nail blocks is provided with nail rods.

[0008] Preferably, the nail block has a groove, a positioning seat is installed at the bottom of the groove, and a through positioning groove is provided at the top center of the positioning seat.

[0009] Preferably, the first connecting rod and the second connecting rod are respectively placed inside the positioning groove.

[0010] Preferably, a threaded post is fixedly installed at the bottom center of the nail block, and the threaded post is threadedly connected to the threaded post groove provided at the top of the nail rod.

[0011] Preferably, the threaded post and the threaded post groove are adapted to each other.

[0012] Preferably, a clamping cap for clamping and fixing the positioning seat is provided on the upper part of the groove, and a connecting block is installed on the top of the clamping cap, and the clamping cap is threadedly connected to the groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model uses components such as a first connecting rod, a second connecting rod, an adjusting seat, screws, a support rod, and a support base to work together, thereby facilitating the adjustment of the width distance between multiple sets of nail rods during use and improving its applicability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the adjusting rear nail rod structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the separate structure of the nail block, nail rod, and clamping cap of this utility model.

[0018] In the diagram: 1. First connecting rod; 2. Second connecting rod; 3. Adjusting seat; 4. Screw; 5. Support rod; 6. Support; 7. Nail block; 8. Positioning seat; 801. Positioning groove; 9. Threaded column; 10. Nail rod; 11. Pressure cap; 12. Connecting block. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-3 This utility model provides a technical solution:

[0021] A conveniently adjustable posterior thoracic and lumbar spine screw-rod structure includes a first connecting rod 1, a second connecting rod 2, screw blocks 7, and screw rods 10. Adjusting seats 3 are fixed at both ends of the center of the first connecting rod 1, and a sliding groove is provided on one side of the adjusting seat 3. A support rod 5 is slidably connected inside the sliding groove. Two sets of symmetrical screw holes are provided on the top surface of the support rod 5. A screw 4 is provided at one end of the top of the adjusting seat 3, and one end of the screw 4, penetrating into the sliding groove, is engaged in the screw hole. Screw blocks 7 are provided at both ends of the first connecting rod 1 and the second connecting rod 2, and the screw blocks 7 are located at the outer ends of the adjusting seat 3 and the support 6. A screw rod 10 is provided at the bottom of the screw blocks 7.

[0022] This utility model uses components such as a first connecting rod 1, a second connecting rod 2, an adjusting seat 3, a screw 4, a support rod 5, and a support 6 to work together, thereby facilitating the adjustment of the width distance between multiple sets of nail rods 10 during use and improving its applicability.

[0023] Furthermore, when it is necessary to adjust the width distance of several sets of nail rods 10, the support 6 on the second connecting rod 2 is moved outward by the hand-operated tool, so that the support rod 5 on the support 6 moves out of the slide groove on the adjusting seat 3. After moving out to the designated position, it stops. Then, the screw 4 is taken out by the tool and inserted into the slide groove inside the adjusting seat 3 and fixed to the nail hole on the surface of the support rod 5, thereby realizing the function of adjusting the width distance between the nail rod structures.

[0024] The nail block 7 has a groove, and a positioning seat 8 is installed at the bottom of the groove. A through positioning groove 801 is formed at the center of the top of the positioning seat 8. The first connecting rod 1 and the second connecting rod 2 are respectively placed inside the positioning groove 801.

[0025] By setting the positioning seat 8 and the positioning groove 801, it is convenient to position and fix the first connecting rod 1 and the second connecting plate when they are placed inside; the first connecting rod 1 and the second connecting rod 2 set here facilitate the connection of several sets of nail rods 10, and the connecting rod can also be set to have a curvature.

[0026] A threaded post 9 is fixedly installed at the bottom center of the nail block 7, and the threaded post 9 is threadedly connected to the threaded post groove provided at the top of the nail rod 10. The threaded post 9 and the threaded post groove are compatible. By setting the threaded post 9 and the threaded post groove, the nail rod 10 can be quickly assembled and can also be placed separately.

[0027] A clamping cap 11 is provided above the interior of the groove for clamping and fixing the positioning seat 8. A connecting block 12 is installed on the top of the clamping cap 11, and the clamping cap 11 is threadedly connected to the groove. By setting the clamping cap 11, it is easy to clamp and fix the first connecting rod 1 and the second connecting rod 2 to prevent them from moving during use; at the same time, the connecting block 12 makes it easy to open the clamping cap 11 from the groove.

[0028] In practical use, the tool is operated by hand to move the support 6 on the second connecting rod 2 outward, so that the support rod 5 on the support 6 moves out of the groove on the adjusting seat 3. After moving out to the designated position, it stops. Then, the tool is used to take the screw 4 and insert it into the groove inside the adjusting seat 3 to fix it to the nail hole on the surface of the support rod 5, thereby realizing the function of adjusting the width distance between the nail rod structure.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A conveniently adjustable posterior thoracolumbar lumbar pedicle screw-rod structure, comprising a first connecting rod (1), a second connecting rod (2), a screw block (7), and a screw rod (10), characterized in that: The first connecting rod (1) has an adjustment seat (3) fixed at both ends of its center. A groove is provided on one side of the adjustment seat (3). A support rod (5) is slidably connected inside the groove. Two sets of symmetrical nail holes are provided on the top surface of the support rod (5). A screw (4) is provided at one end of the top of the adjustment seat (3). One end of the screw (4) that passes through the groove is engaged in the nail hole. The first connecting rod (1) and the second connecting rod (2) are provided with nail blocks (7) at both ends, and the nail blocks (7) are located at the outer ends of the adjusting seat (3) and the support (6). The bottom of the nail block (7) is provided with a nail rod (10).

2. The easily adjustable posterior thoracolumbar pedicle screw-rod structure according to claim 1, characterized in that: The nail block (7) has a groove, and a positioning seat (8) is installed at the bottom of the groove. A through positioning groove (801) is provided at the top center of the positioning seat (8).

3. The easily adjustable posterior thoracolumbar screw-rod structure according to claim 1, characterized in that: The first connecting rod (1) and the second connecting rod (2) are respectively placed inside the positioning groove (801).

4. The easily adjustable posterior thoracolumbar pedicle screw-rod structure according to claim 1, characterized in that: A threaded post (9) is fixedly installed at the bottom center of the nail block (7), and the threaded post (9) is threadedly connected to the threaded post groove provided at the top of the nail rod (10).

5. The easily adjustable posterior thoracolumbar screw-rod structure according to claim 4, characterized in that: The threaded column (9) is adapted to the threaded column groove.

6. The easily adjustable posterior thoracolumbar pedicle screw-rod structure according to claim 2, characterized in that: The inside of the groove is provided with a clamping cap (11) for clamping and fixing the positioning seat (8). A connecting block (12) is installed on the top of the clamping cap (11), and the clamping cap (11) is threadedly connected to the groove.

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