Pedicle screw for centrum strengthening and matched use tool of pedicle screw
By designing a minimally invasive hollow screw-based bone cement-reinforced pedicle screw and its supporting tools, the problems of soft tissue foreign body sensation and insufficient fixation in the treatment of Kumme 11 disease by traditional pedicle screws have been solved. This has enabled minimally invasive surgery and precise injection of bone cement, improving patient tolerance and treatment outcomes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2026-03-10
AI Technical Summary
In treating Kumme 11 disease, traditional bone cement-reinforced pedicle screws have problems such as strong foreign body sensation in soft tissue, inability to effectively fix the middle and posterior column structures of the vertebral body, and large surgical trauma, making them unsuitable, especially for elderly and frail patients.
A minimally invasive hollow screw-type bone cement-reinforced pedicle screw was designed, with supporting tools including a distance control frame and a bone cement pusher. By precisely controlling the orientation of the side holes and the injection of bone cement, the bone cement can be controlled to diffuse in the anterior, middle and posterior columns of the vertebral body, reducing the risk of leakage and improving soft tissue discomfort.
This approach enables minimally invasive surgery, reducing surgical risks and soft tissue damage for patients, while improving treatment tolerance and the effectiveness of bone cement reinforcement.
Smart Images
Figure CN223979848U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of pedicle screw for vertebral body reinforcement and its matched use tool, and particularly relates to a pedicle screw for vertebral body reinforcement and its matched use tool. BACKGROUND
[0002] Kumme11 disease refers to a disease that gradually appears progressive lumbar and back pain and kyphosis under the condition of no clear violent trauma, and the patient is mostly an old person, often accompanied by osteoporosis, and imaging suggests that the vertebral body collapses or the vertebral body crack sign appears, and after excluding tumors, infections and other definite causes, it can be considered as Kumme11 disease. At present, the surgical treatment of this kind of patient mostly adopts the following two ways: firstly, the fractured vertebral body is simply reinforced by bone cement, and usually in this case, the fractured vertebral body of the patient has not caused the change of the physiological curvature of the spine, and the simple reinforcement of the fractured vertebral body can solve the problem of local pain and instability of the fracture of the patient. However, for the patient with the crack sign of the vertebral body, due to the poor bone quality of the vertebral body, the binding force between the bone cement and the vertebral body is insufficient, and in certain cases, even the serious complications of complete separation of the anterior column of the vertebral body, the bone cement mass and the posterior column structure of the vertebral body can occur. Secondly, the fractured vertebral body and its adjacent segments are fixed by the pedicle screw rod system, and usually in this case, the single or multiple vertebral body fracture of the patient causes the change of the physiological curvature of the spine, and the vertebral body needs to be orthopedic to restore the overall shape of the spine, and on this basis, the fractured vertebral body is reinforced by the pedicle screw rod system and bone cement. Although this way can comprehensively solve various problems of the patient, due to the large surgical trauma, some old and weak patients may not be able to tolerate the operation.
[0003] In view of the above situation, some scholars choose to use traditional bone cement to reinforce the fractured vertebral body by pedicle screw. However, this surgical method also has defects, one of which is that the U-shaped pedicle screw for bone cement reinforced pedicle screw rod fixation has a high tail notch, which causes strong foreign body sensation of the soft tissues such as back muscles and skin of the patient during independent use; the second is that the U-shaped pedicle screw for bone cement reinforced pedicle screw rod fixation has a screw bone cement injection side hole, which is usually located in the anterior column of the vertebral body, and cannot reinforce and fix the middle and posterior column structures of the vertebral body.
[0004] Therefore, the technical personnel in the art provide a pedicle screw for vertebral body reinforcement and its matched use tool to solve the problems raised in the background art. UTILITY MODEL CONTENT
[0005] The utility model aims at providing a pedicle screw for vertebral body reinforcement and its matched use tool to solve the problems raised in the background art.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0007] A pedicle screw for vertebral body augmentation and a matched tool thereof, comprising a distance control frame holding frame, the left side of the distance control frame holding frame is fixedly connected with a distance control frame, the middle of the front and back of the outer surface of the distance control frame is fixedly connected with a mark scale, the left side of the middle of the distance control frame is fixedly connected with a bone cement injection channel, and the inside of the bone cement injection channel is fixedly connected with a hollow pipeline; the left side of the distance control frame is threadedly connected with a screw holding frame, the left side of the middle of the screw holding frame is fixedly connected with a screw holder, the left side of the screw holder is fixedly connected with a threaded connection sleeve, the left side of the threaded connection sleeve is threadedly connected with a bone cement augmentation pedicle screw, the outer side of the bone cement augmentation pedicle screw is fixedly connected with a screw external thread, the left side of the outer surface of the bone cement augmentation pedicle screw is internally grooved with a plurality of unfixed lateral holes, and the right side of the outer surface of the bone cement augmentation pedicle screw is internally grooved with a plurality of fixed upward and downward lateral holes.
[0008] As a further scheme of the present application, the right side of the distance control frame holding frame is fixedly connected with a distance control frame holding frame combination port, and the outer side of the distance control frame holding frame combination port is movably connected with a bone cement push rod holding frame combination port.
[0009] As a further scheme of the present application, the inside of the middle of the bone cement push rod holding frame combination port is fixedly connected with a bone cement push rod.
[0010] As a further scheme of the present application, the right side of the bone cement push rod holding frame combination port is fixedly connected with a bone cement push rod holding frame.
[0011] As a further scheme of the present application, the inside of the middle of the screw holder is grooved with a hollow channel.
[0012] As a further scheme of the present application, the inside of the middle of the bone cement augmentation pedicle screw is grooved with a screw hollow channel.
[0013] Compared with the prior art, the present application has the following beneficial effects:
[0014] 1. The improved bone cement augmentation pedicle screw is designed as a minimally invasive hollow screw and is matched with a minimally invasive implantation instrument, so that the conditions for local anesthesia and minimally invasive implantation are met, and the surgical risk and difficulty of the patient are reduced.
[0015] 2. The distribution area of the lateral holes on the outer surface of the improved bone cement augmentation pedicle screw and the orientation of the lateral holes are accurately controlled, and at this time, the controllable bone cement injection is carried out through the bone cement push rod, so that the bone cement dispersion area can be accurately controlled, and the bone cement augmentation effect can be optimized, and the risk of bone cement leakage is reduced.
[0016] 3. The bone cement-reinforced pedicle screw is designed with a low-notch screw tail, which can improve the discomfort of the soft tissue in the lower back after single screw implantation, avoid iatrogenic soft tissue functional damage, and improve the patient's tolerance to the treatment plan. Attached Figure Description
[0017] Fig. 1 This is a schematic diagram of a pedicle screw for vertebral reinforcement and its accompanying tools.
[0018] Fig. 2 This is a plan view of a pedicle screw for vertebral reinforcement and its accompanying tools.
[0019] Fig. 3 This is an enlarged structural diagram of point A in a pedicle screw for vertebral reinforcement and its accompanying tools.
[0020] Fig. 4 This is an enlarged structural diagram of point B in a pedicle screw for vertebral reinforcement and its accompanying tools.
[0021] In the diagram: 1-Distance control frame holder, 2-Distance control frame, 3-Marking scale, 4-Bone cement injection channel, 5-Hollow pipe, 6-Screw holder, 7-Screw holder, 8-Threaded connecting sleeve, 9-Bone cement reinforced pedicle screw, 10-Screw external thread, 11-Side hole, 12-Upper and lower side holes, 13-Distance control frame holder joint, 14-Bone cement push rod holder joint, 15-Bone cement push rod, 16-Bone cement push rod holder, 17-Hollow channel, 18-Screw hollow channel. Detailed Implementation
[0022] Please see Figs. 1-4In this embodiment of the present invention, a pedicle screw for vertebral body reinforcement and its matching tools include a distance control frame holder 1; a distance control frame 2 is fixedly connected to the middle of the left side of the distance control frame holder 1, and marking scales 3 are fixedly connected to the middle of the front and rear sides of the outer surface of the distance control frame 2; a bone cement injection channel 4 is fixedly connected to the middle of the left side of the distance control frame 2, and a hollow pipe 5 is fixedly connected inside the bone cement injection channel 4; a screw holder 6 is threadedly connected to the left side of the distance control frame 2, a screw holder 7 is fixedly connected to the middle of the left side of the screw holder 6, a threaded connecting sleeve 8 is fixedly connected to the left side of the screw holder 7, a bone cement reinforced pedicle screw 9 is threadedly connected to the left side of the threaded connecting sleeve 8, and an external screw thread is fixedly connected to the outer side of the bone cement reinforced pedicle screw 9. 10. The outer surface of the bone cement reinforced pedicle screw 9 has a groove on the left side with several non-fixed lateral holes 11, and the outer surface of the bone cement reinforced pedicle screw 9 has a groove on the right side with several fixed lateral holes 12. The distance control frame holding frame 1 is fixedly connected to the middle of the right side of the distance control frame holding frame 1, and the outer side of the distance control frame holding frame holding frame 13 is movably connected to the bone cement push rod holding frame 14. The bone cement push rod 15 is fixedly connected to the middle of the inner side of the bone cement push rod holding frame 14. The bone cement push rod holding frame 16 is fixedly connected to the right side of the bone cement push rod holding frame 14. The screw holder 7 has a hollow channel 17 in the middle of the inner groove. The bone cement reinforced pedicle screw 9 has a hollow screw channel 18 in the middle of the inner groove.
[0023] The working principle of this utility model is as follows: In use, firstly, the cement-reinforced pedicle screw 9 is threadedly connected to the threaded connecting sleeve 8 on the left side of the screw holder 7. Then, the cement-reinforced pedicle screw 9 and the screw holder 7 are passed through the percutaneous screw guide pin that has been confirmed to pass through the pedicle along the hollow screw channel 18 and the hollow channel 17. By rotating the screw holder 6 on the right side of the screw holder 7, the outer screw external thread 10 of the cement-reinforced pedicle screw 9 is screwed into the vertebral body, so that the inner groove on the right side of the outer surface of the cement-reinforced pedicle screw 9 has several fixed orientations. The upper and lower side holes 12 are aligned with the center of the pedicle in the vertical direction. The prepared bone cement is then drawn into a standard syringe, which is connected to the distance control frame holder joint 13 on the right side of the distance control frame holder 1. The bone cement is then injected into the hollow tube 5 of the bone cement injection channel 4 using the syringe. The bone cement injection channel 4 is then inserted into the hollow channel 17 of the screw holder 7 and rotated until the bone cement injection channel 4 is completely inserted into the anterior column of the vertebral body through the hollow screw channel 18 of the bone cement-reinforced pedicle screw 9. Finally, the bone cement is pushed through the bone cement push rod... 15. Slowly insert the bone cement injection channel 4. During the injection process, the distance control frame 2 can be rotated, and then the distance control frame 2 will drive the bone cement injection channel 4 to slowly rotate and retract. During this period, the position of bone cement injection can be determined by the marking scale 3 on the outer surface of the distance control frame 2, so that the bone cement in the hollow tube 5 in the bone cement injection channel 4 is slowly pushed out of the screw hollow channel 18 and diffused along the side holes 11 and the upper and lower side holes 12 to various parts of the vertebral body. This achieves controllable and appropriate diffusion of bone cement in the anterior, middle and posterior columns of the vertebral body to complete the reinforcement of the vertebral body; the aforementioned The distribution area of the side holes 11 and upper and lower side holes 12 on the outer surface of the bone cement reinforced pedicle screw 9 is improved, and the orientation of the upper and lower side holes 12 is precisely controlled. At this time, bone cement is injected in a controllable manner through the bone cement pusher 15, thereby precisely controlling the bone cement diffusion area, optimizing the bone cement reinforcement effect, and reducing the risk of bone cement leakage. The bone cement reinforced pedicle screw 9 has a low-notch screw tail design, which can improve the discomfort of the soft tissue in the lower back after single screw implantation, avoid iatrogenic soft tissue functional damage, and improve the patient's tolerance to the treatment plan.
[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A pedicle screw for vertebral body augmentation and a set of tools for use therewith, comprising a distance control holder (1), a screw holder (6) and a bone cement augmented pedicle screw (9), characterized in that, The left side of the distance control frame holding frame (1) is fixedly connected with a distance control frame (2), the outer surface of the distance control frame (2) is fixedly connected with a mark scale (3) in the middle of the front and back sides, the left side of the distance control frame (2) is fixedly connected with a bone cement injection channel (4), and the inside of the bone cement injection channel (4) is fixedly connected with a hollow pipeline (5).
2. The pedicle screw for vertebral body reinforcement and the tool set thereof according to claim 1, wherein The left side of the distance control frame (2) is threadedly connected with a screw holding frame (6), the left side of the screw holding frame (6) is fixedly connected with a screw holder (7) in the middle, the left side of the screw holder (7) is fixedly connected with a threaded connection sleeve (8), the left side of the threaded connection sleeve (8) is threadedly connected with a bone cement reinforced pedicle screw (9), the outer side of the bone cement reinforced pedicle screw (9) is fixedly connected with a screw outer thread (10), the outer surface of the bone cement reinforced pedicle screw (9) is internally grooved with a plurality of unfixed orientation side holes (11) on the left side, and the outer surface of the bone cement reinforced pedicle screw (9) is internally grooved with a plurality of fixed orientation up and down side holes (12) on the right side.
3. The pedicle screw for vertebral body reinforcement and the tool set thereof according to claim 2, wherein The right side of the distance control frame holding frame (1) is fixedly connected with a distance control frame holding frame connecting port (13), and the outer side of the distance control frame holding frame connecting port (13) is movably connected with a bone cement push rod holding frame connecting port (14).
4. The pedicle screw for vertebral body reinforcement and the tool set thereof according to claim 2, wherein The inside of the bone cement push rod holding frame connecting port (14) is fixedly connected with a bone cement push rod (15) in the middle.
5. The pedicle screw for vertebral body reinforcement and the tool set thereof according to claim 1, wherein The right side of the bone cement push rod holding frame connecting port (14) is fixedly connected with a bone cement push rod holding frame (16).
6. The pedicle screw for vertebral body reinforcement and the tool set thereof according to claim 1, wherein The inside of the screw holder (7) is internally grooved with a hollow channel (17) in the middle. The inside of the bone cement reinforced pedicle screw (9) is internally grooved with a screw hollow channel (18) in the middle.