Pedicle screw rod structure

Abstract

The utility model discloses a pedicle screw rod structure which comprises a screw rod, a threaded ring is arranged on the outer side of the screw rod, a screw end is connected to the lower end of the screw rod, a clamping head is connected to the upper portion of the screw end, and clamping strips are connected to the two sides of the clamping head. And the positioning end head is installed on the outer side of the clamping head, an inserting groove is formed in the lower portion in the positioning end head, a positioning bolt is installed in the positioning end head, and a locking nut is installed on one side of the positioning bolt. Compared with an existing device, the pedicle screw rod structure has the advantages that the clamping head and the positioning end can be relatively fixed through the positioning bolt, and the positioning bolt can be positioned through the locking nut, so that mutual disassembly and assembly of the clamping head and the positioning end can be facilitated, and the situation that a screw is generally of a fixed structure and cannot be assembled easily is avoided. After implantation, the discomfort of a patient is easily enhanced due to the fact that the size of the end head is large.

Description

Technical Field

[0001] The utility model relates to the technical field of pedicle screw rods, in particular to a pedicle screw rod structure. Background Art

[0002] Passive implantable device pedicle screw is an implant used in spinal surgery, mainly used to treat spinal degenerative diseases and spinal injuries. It is a screw with a special structure that can resist the pressure and traction of the spine by being implanted into the pedicle bone, thereby stabilizing the spine and promoting bone healing. Pedicle screws are usually composed of multiple components such as bolts, hooks, screws, connecting devices, connecting rods, connecting rods, transverse connectors, etc. It is generally made of titanium alloy, pure titanium, cobalt chromium molybdenum, polyetheretherketone and other materials.

[0003] The Chinese patent with the authorization publication number CN208910453U discloses a pedicle screw, including a U-shaped nail head and a screw rod connected to each other, wherein the screw rod is hollow inside, and an external thread is arranged on the screw rod, and a plurality of side holes are formed on the end of the screw rod away from the U-shaped nail head, and each side hole is sequentially arranged on the screw rod between adjacent thread teeth. The utility model has the best fixing strength, is convenient for bone cement implantation, prevents screw loosening and slipping, has the maximum decomposition of screw stress, enhances anti-pullout performance, can accurately screw the screw into the vertebral body through the pedicle, and helps to maintain the reduction during drilling and screw implantation, can reduce the difficulty of surgical operation, improve the quality of surgery, ensure blood supply, and achieve better treatment effect.

[0004] Although the pedicle screws mentioned above can reduce the difficulty of surgical operation, improve the quality of surgery, ensure blood supply, and achieve better treatment effects, the screws are generally fixed structures. After implantation, the large size of the end can easily cause increased discomfort to the patient. For this reason, we propose a pedicle screw rod structure. Utility Model Content

[0005] The utility model aims to provide a pedicle screw rod structure to solve the problem in the above background technology that since the screw is generally a fixed structure, the end head is large in size after implantation, which easily causes increased discomfort to the patient.

[0006] To achieve the above object, the utility model provides the following technical solution: a pedicle screw rod structure, comprising:

[0007] A screw rod, wherein a threaded ring is arranged on the outer side of the screw rod, a screw head is connected to the lower end of the screw rod, a clamp head is connected to the upper side of the screw head, and clamp strips are connected to both sides of the clamp head;

[0008] A positioning end head is installed on the outside of the clamping head, a plug-in slot is provided at the lower part of the positioning end head, a positioning bolt is installed inside the positioning end head, and a locking nut is installed on one side of the positioning bolt.

[0009] Preferably, the thread rings are evenly distributed along the outer side of the screw rod, and the screw head is fixedly connected to the screw rod in an integral manner.

[0010] Preferably, the clamping strips are symmetrically distributed about the vertical center line of the clamping head, and the clamping head passes through the lower part of the positioning end head through the insertion slot.

[0011] Preferably, the positioning bolt passes through the interior of the clamp and the positioning end, and the locking nut is threadedly connected to the positioning bolt.

[0012] Preferably, the positioning end is also provided with:

[0013] A card slot is arranged above the positioning end head, an elastic rubber ring is arranged on the inner wall of the card slot, a docking rod is installed in the card slot, and a docking rod is connected above the docking rod.

[0014] Preferably, the docking rod and the slot are engaged with each other, and an elastic structure is formed between the docking rod and the slot via an elastic rubber ring, and the docking rod and the slot are detachably connected.

[0015] Compared with the prior art, the utility model provides a pedicle screw rod structure, which has the following beneficial effects:

[0016] The utility model can achieve a relative fixing effect between the clamp head and the positioning end head through the positioning bolt, and can position the positioning bolt through the locking nut, so that the clamp head and the positioning end head can be easily disassembled and assembled with each other, avoiding the problem that the screw is generally a fixed structure, which easily causes increased discomfort to the patient due to the large size of the end head after implantation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the screw rod of the utility model;

[0019] Figure 3 This is a structural schematic diagram of the positioning end of the utility model;

[0020] Figure 4 It is a schematic diagram of the top view of the positioning end of the utility model.

[0021] In the figure: 1. screw rod; 2. thread ring; 3. screw end; 4. clamp head; 5. clamping strip; 6. positioning end; 7. plug-in slot; 8. positioning bolt; 9. locking nut; 10. clamping slot; 11. docking rod; 12. force-bearing rod; 13. elastic rubber ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 A pedicle screw rod structure, comprising: a screw rod 1, a threaded ring 2 is arranged on the outer side of the screw rod 1, a screw end 3 is connected to the lower end of the screw rod 1, a clamping head 4 is connected to the upper side of the screw end 3, and clamping strips 5 are connected to both sides of the clamping head 4; the clamping strips 5 are symmetrically distributed about the vertical center line of the clamping head 4, and the clamping head 4 passes through the lower part of the positioning end 6 through the insertion groove 7; the clamping strip 5 can increase the volume of the clamping head 4, so that the screw rod can be clamped through the clamping head 4 to improve the firmness of the screw rod; the threaded rings 2 are evenly distributed along the outer side of the screw rod 1, and the screw end 3 is fixedly connected to the screw rod 1 in an integral manner; the screw end 3 can facilitate the screw The insertion of the nail rod can facilitate the screw rod to be screwed in through the threaded ring 2, so that the screw rod can be easily implanted into the body; the positioning end 6 is installed on the outside of the clamping head 4, and a plug-in groove 7 is opened at the bottom of the positioning end 6. A positioning bolt 8 is installed inside the positioning end 6, and a locking nut 9 is installed on one side of the positioning bolt 8; the positioning bolt 8 runs through the inside of the clamping head 4 and the positioning end 6, and the locking nut 9 is threadedly connected with the positioning bolt 8; the positioning bolt 8 can play a relatively fixing effect between the clamping head 4 and the positioning end 6, and the positioning bolt 8 can be positioned by the locking nut 9, so that the clamping head 4 and the positioning end 6 can be easily disassembled and assembled with each other.

[0024] See also Figure 1 , 3And 4, a pedicle screw rod structure, comprising: a slot 10, which is opened above the positioning end 6, the inner wall of the slot 10 is provided with an elastic rubber ring 13, a docking rod 11 is installed in the slot 10, and the top of the docking rod 11 is connected to the docking rod 11; the slot 10 can facilitate the docking rod 11 to be inserted into the positioning end 6, and the elastic rubber ring 13 can improve the connection tightness between the slot 10 and the docking rod 11; the docking rod 11 and the slot 10 are mutually engaged, and the docking rod 11 forms an elastic structure with the slot 10 through the elastic rubber ring 13, and the docking rod 11 and the slot 10 are detachably connected; the docking rod 11 can be easily twisted through the force-bearing rod 12, so that when needed, the entire screw rod can be driven to rotate by rotating the force-bearing rod 12, thereby saving the force of the screw rod implantation.

[0025] Working principle: when using the pedicle screw rod structure, firstly, the docking rod 11 can be conveniently inserted into the positioning end 6 through the slot 10, and the connection tightness between the slot 10 and the docking rod 11 is improved by the elastic rubber ring 13, and the docking rod 11 is conveniently screwed through the force-bearing rod 12, so that when needed, the entire screw rod can be driven to rotate by rotating the force-bearing rod 12, thereby saving the force of implanting the screw rod, and the screw end 3 can be conveniently inserted into the screw rod, and the screw ring 2 can be conveniently screwed in, so that the screw rod can be conveniently implanted into the body, and the volume of the clamping head 4 can be increased by the clamping strip 5, so that the screw rod can be clamped by the clamping head 4 to improve the firmness of the screw rod, and finally, after the implantation is completed, the locking nut 9 is removed, and then the positioning bolt 8 is screwed down, and the clamping head 4 and the positioning end 6 can be disassembled from each other. This is the working principle of the pedicle screw rod structure.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pedicle screw rod structure, characterized in that: include: A screw rod (1), wherein a threaded ring (2) is arranged on the outer side of the screw rod (1), a screw end (3) is connected to the lower end of the screw rod (1), a clamping head (4) is connected to the upper side of the screw end (3), and clamping strips (5) are connected to both sides of the clamping head (4); A positioning end head (6) is mounted on the outside of the clamping head (4), a plug-in slot (7) is provided at the bottom of the positioning end head (6), a positioning bolt (8) is installed inside the positioning end head (6), and a locking nut (9) is installed on one side of the positioning bolt (8).

2. A pedicle screw rod structure according to claim 1, characterized in that: The thread rings (2) are evenly distributed along the outer side of the screw rod (1), and the screw end (3) is fixedly connected to the screw rod (1) in an integral manner.

3. A pedicle screw rod structure according to claim 1, characterized in that: The clamping strips (5) are symmetrically distributed about the vertical center line of the clamping head (4), and the clamping head (4) passes through the lower part of the positioning end head (6) through the insertion slot (7).

4. The pedicle screw rod structure according to claim 1, characterized in that: The positioning bolt (8) passes through the interior of the clamp (4) and the positioning end head (6), and the locking nut (9) is threadedly connected to the positioning bolt (8).

5. The pedicle screw rod structure according to claim 1, characterized in that: The positioning end (6) is also provided with: A card slot (10) is provided above the positioning end head (6), an inner wall of the card slot (10) is provided with an elastic rubber ring (13), a docking rod (11) is installed in the card slot (10), and a docking rod (11) is connected above the docking rod (11).

6. The pedicle screw rod structure according to claim 5, characterized in that: The docking rod (11) and the clamping slot (10) are mutually clamped, and an elastic structure is formed between the docking rod (11) and the clamping slot (10) through an elastic rubber ring (13), and the docking rod (11) and the clamping slot (10) are detachably connected.

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