A pedicle screw system for treating a lumbar isthmic spondylolisthesis

Abstract

The utility model relates to lumbar vertebra treatment instrument technical field, especially in a kind of pedicle screw system for treating lumbar isthmus, including pedicle screw, clamping groove, titanium cable, anti-cutting steel sheet, fixed clamp, clamping groove is equipped with inside pedicle screw, clamping groove is equipped with inside titanium cable, titanium cable side is equipped with anti-cutting steel sheet, anti-cutting steel sheet inside is equipped with through-hole for titanium cable to pass through, titanium cable is equipped with fixed clamp at circuitous junction, to ipsilateral lamina drilling, titanium cable is passed through from hole, and anti-cutting steel sheet is placed in lamina ventral, steel sheet has two holes and lamina drilling is in accord with, after titanium cable is passed through the two holes of steel sheet in lamina, fixed in pedicle clamping groove, after using tightening forceps to tighten, fixed clamp is locked to reach the effect of elastic fixing isthmus;The utility model effectively combines the pedicle screw and titanium cable, forms more stable support system, implantation process is more convenient, operator is more convenient to operate, more conducive to the wound healing of lumbar isthmus fissure patient.

Description

Technical Field

[0001] This utility model belongs to the field of lumbar spine treatment device technology, and specifically relates to a pedicle screw system for treating lumbar isthmus fracture. Background Technology

[0002] The occurrence of lumbar isthmic spondylolisthesis is a significant cause of lumbar spondylolisthesis. The causes of lumbar isthmic spondylolisthesis can be acquired through trauma or caused by congenital developmental abnormalities. After the occurrence of lumbar isthmic spondylolisthesis, the symptoms persist for a long time without relief, affecting normal work and life. In the surgical treatment process, the slipped vertebral body is fused with the next vertebral body and internally fixed with pedicle screws. At the same time, paravertebral bone grafting is performed to achieve timely, effective and standardized treatment of lumbar isthmic spondylolisthesis.

[0003] A review of relevant literature revealed patent application number 2021201526039, which describes a pedicle screw system for treating lumbar spondylolysis. This system includes a screw-rod fixation mechanism and a binding rope fixation mechanism that are fixedly connected to each other. The screw-rod fixation mechanism includes a U-shaped screw base, a pedicle screw, a retaining ring, and a locking bolt. The binding rope fixation mechanism includes a rope threading seat and a rope locking bolt. This pedicle screw system, combined with the rod and binding rope, forms a more stable support system. While achieving effective fixation, it allows for slight movement of the spondylolysis site and bone graft area, promoting spondylolysis healing and reducing trauma to the patient.

[0004] However, it still has the following shortcomings: the implantation process is relatively complicated, the operation during the operation is relatively complicated, it requires the undamaged lumbar vertebrae as the fixation benchmark, and the recovery time is relatively long. Summary of the Invention

[0005] The purpose of this invention is to provide a pedicle screw system for treating lumbar isthmus fractures, overcoming the shortcomings of existing technologies.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A pedicle screw system for treating lumbar isthmus fracture includes a pedicle screw, a slot, a titanium cable, a cut-resistant steel plate, and a fixation clip. The pedicle screw has a slot inside, and the titanium cable is placed inside the slot. A cut-resistant steel plate is located on one side of the titanium cable, and the cut-resistant steel plate has a through hole for the titanium cable to pass through. A fixation clip is located at the junction of the titanium cable and the pedicle screw. A hole is drilled in the lamina on the same side, and the titanium cable is passed through the hole. The cut-resistant steel plate is placed on the ventral side of the lamina, with two holes on the steel plate that match the drilled hole. After the titanium cable passes through the lamina and the two holes in the steel plate, it is fixed in the pedicle slot. After tightening with clamps, the fixation clip is locked to achieve elastic fixation of the isthmus.

[0008] Preferably, the pedicle screw has a tailless structure to reduce damage to the patient during treatment.

[0009] Preferably, the pedicle screw has a segmented, unequal-pitch thread, which makes the fixation more stable.

[0010] Preferably, the slot is oriented obliquely inward and upward, with a depth of 2mm, to prevent the titanium cable from loosening.

[0011] Preferably, the length of the pedicle screw is 40mm to 55mm.

[0012] Preferably, the diameter of the pedicle screw is 5.5mm to 6.5mm.

[0013] Preferably, the cut-resistant steel plate is 8mm long, 1mm thick, 2mm-3mm wide, and the distance between the two through holes is 4mm-6mm.

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] By effectively combining the pedicle screw with the titanium cable, a more stable support system is formed, thus better treating lumbar spondylolysis. The implantation process is more convenient, the operation is easier for the surgeon, the fastening effect is better, the fixation effect is better, and it is more conducive to the wound healing of patients with lumbar spondylolysis. During the operation, only the injured vertebra needs to be fixed without damaging the adjacent intervertebral disc. Combined with the fatigue-resistant titanium cable, it can achieve effective fixation while allowing slight movement of the spondylolysis site and bone graft area, promoting the healing of the spondylolysis. In addition, the volume of the extracorporeal metal component is significantly reduced, avoiding stimulation of the back muscles and greatly shortening the recovery time. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of a pedicle screw system for treating lumbar isthmus fractures according to the present invention.

[0017] Appendix Figure 2 This is a schematic diagram of the pedicle screw structure in a pedicle screw system for treating lumbar isthmus fractures according to this utility model.

[0018] In the diagram: 1. Pedicle screw; 11. Slot; 2. Titanium cable; 3. Cut-resistant steel plate; 4. Fixing clip. Detailed Implementation

[0019] The following will refer to the appendix in the embodiments of this utility model. Figure 1-2The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] A pedicle screw system for treating lumbar isthmus fracture includes a tailless pedicle screw 1 and a titanium cable 2-cut-resistant steel plate 3 system that are fixedly connected to each other. The pedicle screw 1 has a tailless structure and a groove 11 at the proximal end that slopes inward and upward to ensure that the titanium cable 2 will not loosen. The thread of the pedicle screw 1 is a segmented unequal-pitch thread, which makes the fixation more stable. The pedicle screw 1 is 45mm long and 5mm in diameter. A hole is drilled in the lamina on the same side, and the titanium cable 2 is passed through the hole. A cut-resistant steel plate 3 is placed on the ventral side of the lamina. The steel plate 3 has two holes that match the holes drilled in the lamina. After the titanium cable 2 is passed through the lamina and the two holes in the steel plate 3, it is fixed in the pedicle groove 11. After tightening with tightening pliers, the fixation clamp 4 is locked to achieve the effect of elastic fixation of the isthmus.

[0021] The embodiments of the present utility model have been shown and described above. For those skilled in the art, it will be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle of the present utility model. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the present utility model.

Claims

1. A pedicle screw system for treating lumbar isthmus fracture, comprising pedicle screws, slots, titanium cables, cut-resistant steel plates, and fixation clips, characterized in that... The pedicle screw has a groove inside, and a titanium cable is placed inside the groove. A cut-resistant steel plate is provided on one side of the titanium cable, and a through hole is opened inside the cut-resistant steel plate for the titanium cable to pass through. A fixing clip is provided at the junction of the titanium cable.

2. The pedicle screw system for treating lumbar isthmus fracture according to claim 1, characterized in that... The pedicle screw has a tailless structure.

3. The pedicle screw system for treating lumbar isthmus fracture according to claim 1, characterized in that... The slot is oriented diagonally inward and upward, with a depth of 2mm.

4. A pedicle screw system for treating lumbar isthmus fracture according to claim 1, characterized in that... The cut-resistant steel plate is 8mm long, 1mm thick, 2mm-3mm wide, and the distance between the two through holes is 4mm-6mm.

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