Anti-falling structure for vertebral plate screw

Abstract

The utility model discloses an anti-falling structure for a vertebral plate screw, which can effectively realize an anti-falling function of the vertebral plate screw in an implanting process by arranging a through groove on a handle and arranging a hanging rod. The hanging rod can penetrate through the handle and is matched with the thread in the head of the vertebral plate screw through the thread, it is guaranteed that the vertebral plate screw cannot fall off in the implanting process, and the safety and accuracy of the operation are further improved. The whole structural design is simple, convenient and efficient, an operator can complete the implanting process of the vertebral plate screw more easily and accurately, potential safety hazards caused by falling of the screw in a traditional design are avoided, and the operability and the success rate of an operation are improved.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, specifically, it relates to an anti-fall-off structure for lamina screws. Background Technology

[0002] Cervical spondylotic myelopathy is a common spinal disease. Conservative treatment is not very effective, and surgery is the primary treatment. Among these treatments, laminoplasty, which does not damage the vertebral body and intervertebral disc structure and does not completely remove the lamina, can achieve sufficient decompression and is therefore widely accepted.

[0003] The laminectomy system is a passive surgical implant widely used in laminoplasty. As an internal fixation material, it forms a stable bridging structure through the organic combination of the implant, laminae, and lateral masses, providing rigid support for the spinal canal. The laminectomy system plays a crucial role in laminoplasty, particularly in supporting the "opening side," effectively preventing spinal canal collapse or restenosis, thus helping to maintain postoperative spinal canal stability and reducing compression on the spinal cord and nerve roots.

[0004] With the gradual maturation of micro-titanium plate technology, more and more commercially available products are appearing in the medical field. These products have gained widespread application and recognition due to their high material strength, light weight, and good biocompatibility. The widespread adoption of laminectomy systems has not only improved the safety and effectiveness of spinal canal widening surgery but also significantly enhanced the quality of postoperative recovery for patients.

[0005] As a crucial component of the laminar fixation system, the safe implantation of laminar screws is fundamental to ensuring the effectiveness of the entire fixation system. However, current laminar screw designs have certain safety hazards, particularly regarding preventing dislodgement during implantation, where effective protective measures are lacking.

[0006] In actual implantation procedures, due to the small size of laminectomy screws and the fact that the implantation operation usually needs to be performed in a relatively confined area, if a screw accidentally slips out of control and falls into the body during implantation, it is difficult to find and may pose a serious safety hazard. Therefore, incorporating mechanisms to prevent the screw from falling out into the design has become an important direction for current design improvements.

[0007] In view of this, this utility model is proposed. Utility Model Content

[0008] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a structure to prevent the lamina screw from falling off, thus solving the problems mentioned in the background art.

[0009] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0010] A lamina screw anti-drop structure includes: a lifting rod, a handle, and a lamina screw. One end of the handle has a crosshead for driving the lamina screw. The handle has a through groove extending from one end to the other end of the crosshead, allowing the lifting rod to slide. The end of the lifting rod passing through the crosshead is threaded, and the end of the lifting rod away from the crosshead has a blocking structure. The head of the lamina screw has a cross groove that matches the crosshead, and the axis of the cross groove has a vertical threaded groove that matches the end of the lifting rod.

[0011] Optionally, the handle consists of a handheld part and a connecting part, wherein the diameter of the handheld part is larger than the diameter of the connecting part.

[0012] Optionally, the outer wall of the handgrip may be provided with friction texture.

[0013] Optionally, the end of the tensioning rod away from the crosshead has a handle.

[0014] Optionally, the length of the tension rod is greater than the length of the handle, and the handle abuts against the hand-held part when the tension rod is inside the handle.

[0015] Optionally, the diameter of the blocking structure is larger than the diameter of the through groove.

[0016] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0017] By incorporating a through groove at the end of the handle and sliding a tightening rod, stable tightening of the laminectomy screw can be effectively achieved. The tightening rod passes through the through groove and matches the thread inside the laminectomy screw head, ensuring that the screw will not fall out during implantation, further improving the safety and accuracy of the surgery. The overall structural design of this invention is simple and efficient, allowing operators to more easily and accurately complete the laminectomy screw implantation process, avoiding the potential safety hazards caused by screw falling out in traditional designs, and improving the operability and success rate of the surgery.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0020] In the picture:

[0021] Figure 1 A schematic cross-sectional view of the fitting of the tensioning rod, handle, and lamina screw;

[0022] Figure 2 This is a front view of the suspension rod;

[0023] Figure 3 This is a cross-sectional view of the handle;

[0024] Figure 4 This is a cross-sectional view of the lamina screw;

[0025] Figure 5 One of the three-dimensional structural diagrams of a lamina screw;

[0026] Figure 6 This is a three-dimensional structural diagram of the suspension rod;

[0027] Figure 7 This is the second three-dimensional structural diagram of a lamina screw;

[0028] Figure 8 This is a three-dimensional schematic diagram of the fit between the suspension rod and the vertebral plate screw.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Suspension rod; 2. Handle; 3. Cone plate screw; 1-1. Threaded structure; 1-2. Blocking structure; 1-3. Handle; 2-1. Cross head; 2-2. Through groove; 2-3. Hand grip; 2-4. Connecting part; 3-1. Thread; 3-2. Cross groove.

[0031] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings.

[0033] A structure for preventing the lamina screw from falling off includes: a lifting rod 1, a handle 2, and a lamina screw 3. One end of the handle 2 is connected to a crosshead 2-1 for driving the lamina screw 3. The handle 2 has a through groove 2-2 extending from one end to the other end of the crosshead 2-1. The lifting rod 1 can slide inside the through groove 2-2. The end of the lifting rod 1 passing through the crosshead 2-1 has a threaded structure 1-1, and the end of the lifting rod 1 away from the crosshead 2-1 has a blocking structure 1-2. The head of the lamina screw 3 has a thread 3-1 that can be adapted to the threaded structure 1-1 of the lifting rod. The head of the lamina screw 3 has a cross groove 3-2, and the crosshead 2-1 can drive the cross groove 3-2.

[0034] In this embodiment, the handle 2 is composed of a hand-held part 2-3 and a connecting part 2-4, wherein the diameter of the hand-held part 2-3 is larger than the diameter of the connecting part 2-4.

[0035] In this embodiment, the diameter of the blocking structure 1-2 is larger than the diameter of the through groove 2-2.

[0036] In this embodiment, friction texture is provided on the periphery of the outer wall of the handheld part 2-3.

[0037] In this embodiment, the end of the tensioning rod 1 away from the crosshead 2-1 has a handle 1-3.

[0038] In this embodiment, the length of the tensioning rod 1 is greater than the length of the handle 2, and the blocking structure 1-2 abuts against the handheld part 2-3 when the tensioning rod 1 is located inside the handle 2.

[0039] Working principle: During the implantation of the lamina screw, the suspension rod 1 is first inserted into the through slot 2-2 and rotated. The threaded structure 1-1 matches the thread 3-1 inside the head of the lamina screw 3, thus fixing the lamina screw 3 in place. The lamina screw 3 is then moved to the desired implantation position. Next, the crosshead 2-1 on the handle 2 drives the cross groove 3-2 of the lamina screw 3, causing the lamina screw 3 to rotate and implant into the body, thus completing the implantation process.

[0040] Once the implantation process is complete, the cervical suspension bar 1 needs to be separated from the lamina screw 3 to remove the cervical suspension bar 1 and handle 2. The specific process is described as follows: Keeping handle 2 stationary, the cervical suspension bar 1 is twisted in the opposite direction to disengage the lamina screw 3 from the cervical suspension bar 1, allowing the cervical suspension bar 1 and handle 2 to be removed.

[0041] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A structure for preventing the lamina screw from falling off, characterized in that, include: The device comprises a tension rod (1), a handle (2), and a lamina screw (3). One end of the handle (2) is connected to a crosshead (2-1) for driving the lamina screw (3). The handle (2) has a through groove (2-2) extending from one end to the other end of the crosshead (2-1). The tension rod (1) can slide inside the through groove (2-2). The end of the tension rod (1) passing through the crosshead (2-1) has a threaded structure (1-1). The end of the tension rod (1) away from the crosshead (2-1) has a blocking structure (1-2). The head of the lamina screw (3) has a thread (3-1) that can be adapted to the threaded structure (1-1) of the tension rod. The head of the lamina screw (3) has a cross groove (3-2), and the crosshead (2-1) can drive the cross groove (3-2).

2. The anti-fall-off structure for lamina screws according to claim 1, characterized in that, The handle (2) consists of a hand-held part (2-3) and a connecting part (2-4), wherein the diameter of the hand-held part (2-3) is larger than the diameter of the connecting part (2-4).

3. The anti-fall-off structure for lamina screws according to claim 1, characterized in that, The diameter of the blocking structure (1-2) is larger than the diameter of the through groove (2-2).

4. The anti-fall-off structure for lamina screws according to claim 2, characterized in that, Friction texture is provided on the periphery of the outer wall of the handheld part (2-3).

5. The anti-fall-off structure for lamina screws according to claim 1, characterized in that, The end of the tensioning rod (1) away from the crosshead (2-1) has a handle (1-3).

6. The anti-fall-off structure for lamina screws according to claim 2, characterized in that, The length of the tension rod (1) is greater than the length of the handle (2), and the blocking structure (1-2) abuts against the hand-held part (2-3) when the tension rod (1) is inside the handle (2).

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