Minimally invasive bone cement device for anterior and posterior thoracolumbar fracture and use method

Abstract

The invention discloses a minimally invasive bone cement device for anterior and posterior thoracolumbar fracture and a using method, and belongs to the technical field of medical equipment, the minimally invasive bone cement device comprises a puncture guide mechanism, a bone cement mechanism and a channel dilator, a shifting piece mechanism is detachably mounted in the channel dilator, and the bottom of a shifting piece body is of an arc-shaped structure; and a bone cement injection mechanism. By arranging the bone cement bag, the leakage risk of the bone cement is solved, the risk that the bone cement leaks to a spinal canal or a para-vertebral tissue is reduced, and therefore serious complications such as nerve injury and pulmonary embolism are avoided. A specific shape can be formed in a fractured vertebral body through the arrangement of the shifting piece mechanism, and uniform distribution of bone cement in the vertebral body is ensured by introducing a bone cement distribution control mechanism, so that the stability of the fractured vertebral body is enhanced, and the treatment effect is improved. And meanwhile, effective recovery of the height of the serious compression fracture centrum is realized, and the physiological curvature and function of the post-operation spine of a patient are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a minimally invasive bone cement device and a using method for the anterior and posterior approaches of thoracolumbar fractures. Background Art

[0002] Thoracolumbar Compression Fractures (TLCF) are common spinal injuries, especially with a relatively high incidence in elderly osteoporotic patients.

[0003] Traditional treatment methods include conservative treatment (such as bed rest, brace fixation) and open surgery (such as anterior or posterior vertebroplasty). However, conservative treatment has a long cycle and poor quality of life for patients, while open surgery has large trauma, many complications, and a long recovery time.

[0004] In recent years, minimally invasive surgery techniques have gradually become the mainstream methods for treating thoracolumbar compression fractures, especially Percutaneous Vertebroplasty (PVP) and Percutaneous Kyphoplasty (PKP). These techniques stabilize fractures and relieve pain by injecting bone cement (such as polymethyl methacrylate, PMMA) into the fractured vertebrae. However, the existing minimally invasive bone cement systems still have the following problems:

[0005] High risk of bone cement leakage: The existing technology lacks an effective bone cement flow control mechanism, resulting in a relatively high leakage risk.

[0006] Complicated surgical operation: The existing systems require multiple adjustments of injection parameters during the bone cement injection process, increasing the surgical time and operation difficulty.

[0007] Uneven bone cement distribution: It is difficult for the existing technology to achieve uniform distribution of bone cement in the vertebra, affecting the treatment effect.

[0008] Insufficient restoration of vertebral height: The existing technology has limited ability to restore vertebral height, especially for severely compressed fractures, and the postoperative restoration of vertebral height is not ideal.

[0009] There is an urgent need to propose a minimally invasive bone cement device and a using method for the anterior and posterior approaches of thoracolumbar fractures to solve the above technical problems. Summary of the Invention

[0010] The object of the present invention is to provide a minimally invasive bone cement device and a usage method for anterior and posterior approaches of thoracolumbar fractures to solve the above problems. The minimally invasive bone cement device for anterior and posterior approaches of thoracolumbar fractures disclosed in the present application solves the risk of bone cement leakage by setting a bone cement sac, thereby reducing the risk of bone cement leakage into the spinal canal or paravertebral tissues, and thus avoiding serious complications such as nerve injury and pulmonary embolism. By setting a flipper mechanism, a specific shape can be formed in the fractured vertebral body. By introducing a bone cement distribution control mechanism, the uniform distribution of bone cement in the vertebral body is ensured, the stability of the fractured vertebral body is enhanced, and the treatment effect is improved. At the same time, the effective restoration of the height of severely compressed fracture vertebral bodies is realized, and the postoperative spinal physiological curvature and function of patients are improved. By integrating the above technical advantages, a safe, efficient and minimally invasive treatment plan is provided, postoperative complications are reduced, the rehabilitation time of patients is shortened, and the quality of life is improved. The present invention aims to provide a safer, more accurate and efficient minimally invasive treatment means for patients with thoracolumbar compression fractures, make up for the deficiencies of the existing technology, and promote the further development of spinal minimally invasive surgery technology.

[0011] To achieve the above object, the present invention provides the following solutions: The present invention discloses a minimally invasive bone cement device for anterior and posterior approaches of thoracolumbar fractures, including:

[0012] A puncture guiding mechanism, during puncture, under the real-time imaging navigation system, the puncture guiding mechanism can accurately locate the fractured vertebral body and plan the puncture path;

[0013] A bone cement mechanism, including a channel dilator, a flipper mechanism is detachably installed in the channel dilator. The flipper mechanism includes a flipper controller inserted into the channel dilator. A rod body is fixedly connected below the flipper controller. A flipper body is fixedly connected below the rod body. A first block is fixedly connected to the rod body. A second block is fixedly installed on the inner wall of the channel dilator. During puncture, the rod body penetrates through the second block. An elastic member is fixedly installed between the first block and the second block. Among them, during minimally invasive operation, press the flipper controller to penetrate the flipper body outside the channel dilator body until it reaches the fractured vertebral body. Insert the flipper controller into the channel dilator and rotate the channel dilator to make the flipper body form a unique shape in the fractured vertebral body; the bottom of the flipper body is an arc structure;

[0014] A bone cement injection mechanism, including a bone cement high-pressure injector interface, a bone cement high-pressure injector tube body and a bone cement sac. For the bone cement high-pressure injector interface and the bone cement high-pressure injector tube body, several branch short tubes are arranged outside the bone cement high-pressure injector tube body. The bone cement sac is sleeved on the branch short tubes. After injecting bone cement, the bone cement sac detaches from the branch short tubes, and the bone cement sac is consistent with the unique shape formed in the fractured vertebral body.

[0015] Preferably, the paddle controller is a T-shaped thin sheet, wherein the width of the paddle controller inside the channel expander is smaller than the width outside the channel expander.

[0016] Preferably, a through groove is provided on the channel expander. During minimally invasive surgery, the side with the smaller width of the paddle controller moves along the through groove.

[0017] A plurality of card slots are provided on the channel expander, and the card slots are located on both sides of the through groove. During minimally invasive surgery, after the paddle body reaches the designated position, the side with the larger width of the paddle controller is inserted into one of the card slots.

[0018] Preferably, the paddle body is a block formed by a quarter-circular structure.

[0019] Preferably, the channel expander includes a channel body and a head installed thereon.

[0020] Preferably, the elastic member is preferably a spring.

[0021] Preferably, the puncture guiding mechanism is a puncture guide.

[0022] Preferably, the paddle body is a semi-elliptical structure.

[0023] To achieve the above object, the present invention also provides the following solution: The present invention also discloses a method for using a minimally invasive bone cement device for anterior and posterior approaches of thoracolumbar fractures, and the specific steps are as follows:

[0024] Implant the puncture guiding mechanism into the fractured vertebral body: Through the real-time imaging navigation system, the target fractured vertebral body is fluoroscopically located, and the puncture guiding mechanism reaches the fractured vertebral body through the pedicle or the side of the vertebral body.

[0025] Implant the bone cement mechanism: After passing the channel expander through the puncture guiding mechanism and continuing to puncture forward, press the paddle mechanism until it reaches the fractured vertebral body, then insert the paddle mechanism onto the channel expander, rotate the channel expander 360°, form a specific shape in the fractured vertebral body, release the paddle mechanism, and pull out the channel expander.

[0026] Inject bone cement: Insert the bone cement high-pressure injector tube body along the puncture guiding mechanism, reach the position and implant the bone cement sac, inject bone cement through the bone cement high-pressure injector interface. After completion, pull out the above devices in sequence to complete the minimally invasive surgery.

[0027] Compared with the prior art, the present invention has the following advantages and technical effects:

[0028] 1. By setting up the bone cement sac, the risk of bone cement leakage is addressed, effectively avoiding the risk of bone cement leaking into the spinal canal or paravertebral tissues, and preventing serious complications such as nerve injury and pulmonary embolism.

[0029] 2. Through the structural design of the flipper body, according to the unique shape formed within the fractured vertebral body, it ensures the uniform distribution of bone cement within the vertebral body, enhances the stability of the fractured vertebral body, improves the treatment effect, and solves the problem of bone cement loosening; improves surgical safety and efficacy. Through uniform distribution and vertebral body reduction techniques, it provides a safe, efficient, and minimally invasive treatment plan, reduces postoperative complications, shortens the patient's recovery time, and improves the quality of life.

[0030] 3. The combination of the bone cement mechanism and the bone cement sac can effectively restore the height of the vertebral body with severe compression fractures, and improve the postoperative spinal physiological curvature and function of the patient.

[0031] 4. Wide range of applications. The minimally invasive bone cement device disclosed in the present invention is applicable to anterior and posterior surgeries, and can treat various types of thoracolumbar compression fractures, including osteoporotic fractures and traumatic fractures. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings:

[0033] Figure 1 It is a schematic structural diagram of the minimally invasive bone cement device in the present invention;

[0034] Figure 2 It is Figure 1 a schematic structural diagram of another perspective;

[0035] Figure 3 It is a schematic structural diagram of the cooperation between the flipper controller and the channel expander;

[0036] Figure 4 It is a schematic structural diagram of the bone cement mechanism in the present invention;

[0037] Figure 5 It is a schematic structural diagram of the connection between the rod body and the flipper controller in the present invention;

[0038] Figure 6 It is a schematic structural diagram of the connection between the elastic member, the rod body, and the flipper body in the present invention;

[0039] Figure 7 It is a schematic structural diagram of the cooperation between the flipper mechanism and the channel expander;

[0040] Figure 8 Schematic structural diagram of the bone cement injection mechanism;

[0041] Figure 9 Schematic structural diagram of the paddle body in Embodiment 2;

[0042] Figure 10 is Figure 9 Schematic structural diagram of different distribution modes of the paddle body in;

[0043] Figure 11 Schematic structural diagram of the paddle body in Embodiment 3;

[0044] Figure 12 is Figure 11 Schematic structural diagram of different distribution modes of the paddle body in;

[0045] Figure 13 Schematic structural diagram of the branch short tube;

[0046] Among them, 1. Puncture guiding mechanism; 11. Puncture guide; 2. Bone cement mechanism; 21. Channel dilator; 211. Through groove; 212. Card slot; 213. Channel body; 214. End; 22. Paddle mechanism; 221. Paddle controller; 2211. Protruding section; 2212. Concave section; 2213. Arc section; 222. Rod body; 223. Elastic member; 224. Paddle body; 225. Block Ⅰ; 226. Block Ⅱ; 3. Bone cement injection mechanism; 31. Bone cement sac; 32. Bone cement high-pressure injector interface; 33. Bone cement high-pressure injector tube body; 34. Branch short tube. Specific embodiments

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] Embodiment 1

[0050] As Figures 1 - 8 and Figure 13 shown, the present invention discloses a minimally invasive bone cement device for the anterior and posterior approaches of thoracolumbar fractures, including:

[0051] The puncture guiding mechanism 1 can accurately locate the fractured vertebral body and plan the puncture path under the real-time imaging navigation system during puncture.

[0052] The bone cement mechanism 2 includes a channel dilator 21. A flipper mechanism 22 is detachably installed in the channel dilator 21. The flipper mechanism 22 includes a flipper controller 221 inserted into the channel dilator 21. A rod body 222 is fixedly connected below the flipper controller 221. A flipper body 224 is fixedly connected below the rod body 222. A block Ⅰ 225 is fixedly connected to the rod body 222. A block Ⅱ 226 is fixedly installed on the inner wall of the channel dilator 21. During puncture, the rod body 222 penetrates through the block Ⅱ 226. An elastic member 223 is fixedly installed between the block Ⅰ 225 and the block Ⅱ 226. During minimally invasive surgery, the flipper controller 221 is pressed to penetrate the flipper body 224 outside the main body of the channel dilator 21 until it reaches the fractured vertebral body. The flipper controller 221 is inserted into the channel dilator 21, and the channel dilator 21 is rotated to make the flipper body 224 form a specific shape within the fractured vertebral body. The bottom of the flipper body 224 is an arc structure.

[0053] The bone cement injection mechanism 3 includes a bone cement high-pressure injector interface 32, a bone cement high-pressure injector tube body 33, and a bone cement bag 31. The bone cement high-pressure injector interface 32 and the bone cement high-pressure injector tube body 33 are integrally formed. A number of branch short tubes 34 are arranged outside the bone cement high-pressure injector tube body 33. The bone cement bag 31 is sleeved on the branch short tubes 34. After injecting the bone cement, the bone cement bag 31 detaches from the branch short tubes 34, and the shape of the bone cement bag 31 is consistent with the specific shape formed within the fractured vertebral body.

[0054] Specifically, as Figures 3 - 8 and Figure 13As shown in the figure, the bone cement material is an improved polymethyl methacrylate (PMMA) bone cement, which has an appropriate setting time, fluidity, and biocompatibility. In order to form a unique shape in the fractured vertebral body more conveniently and quickly, the pick mechanism 22 is detachably installed in the channel expander 21. When it is necessary to use the pick body 224 to cut the tissue in the fractured vertebral body into a specific shape, press the pick controller 221. Since the rod body 222 also moves downward during the downward pressing of the pick controller 221, the rod body 222 will pass through the second clamping block 226 and move downward until the pick body 224 passes out of the channel expander 21. At this time, the elastic member 223 is in a compressed state. When the designated position is reached, the pick controller 221 is clamped on the channel expander 21. At this time, the channel expander 21 can be rotated 360 degrees, so that the tissue of the fractured vertebral body can be cut into a specific shape. After the cutting is completed, push the pick controller 221 to make it in a non-clamped state with the channel expander 21. At this time, the elastic member 223 is released and pops out, which will drive the pick body 224 to retract. Then, the channel expander 21 can be pulled out as a whole. Then, the bone cement sac 31 is sleeved on the branch short tube 34, and the bone cement high-pressure injector tube body 33 is inserted along the puncture guiding mechanism 1, and the bone cement sac 31 is implanted into the fractured vertebral body accordingly. Bone cement is injected through the bone cement high-pressure injector interface 32. After the bone cement injection is completed, the devices can be pulled out in sequence. Since a specific shape is formed in the fractured vertebral body, the injected bone cement flows more evenly. In the prior art, the bone cement is directly injected, and it will flow randomly, resulting in uneven distribution finally. After its distribution is even, it can also ensure the density of the hardened bone cement, and at the same time solve the problem of bone cement loosening, enhance the stability of the fractured vertebral body, and improve the treatment effect. Moreover, in the presence of the bone cement sac 31, the risk of bone cement leakage into the spinal canal or paravertebral tissue is effectively avoided, and serious complications such as nerve injury and pulmonary embolism are avoided. Furthermore, the combination of the bone cement mechanism 2 and the bone cement sac 31 can effectively restore the height of the vertebral body of severe compression fractures, improve the postoperative spinal physiological curvature and function of patients. Improve the safety and efficacy of the operation. Through the uniform distribution and vertebral body reduction technology, a safe, efficient, and minimally invasive treatment plan is provided, reducing postoperative complications, shortening the patient's recovery time, and improving the quality of life. In addition, the application range is wide. The present invention is applicable to anterior and posterior surgeries and can treat various types of thoracolumbar compression fractures, including osteoporotic fractures and traumatic fractures. The number and arrangement of the branch short tubes 34 can be set according to the number and arrangement of the bone cement sacs 31. If there are redundant branch short tubes 34, they can also be blocked with rubber plugs in advance.

[0055] In a further optimized solution, the pick controller 221 is a T-shaped thin sheet. Among them, the width of the pick controller 221 located inside the channel expander 21 is smaller than the width located outside the channel expander 21.

[0056] For a further optimized solution, a through groove 211 is provided on the channel expander 21. During minimally invasive surgery, the side with a smaller width of the paddle controller 221 moves along the through groove 211.

[0057] A plurality of clamping grooves 212 are provided on the channel expander 21, and the clamping grooves 212 are located on both sides of the through groove 211. During minimally invasive surgery, after the paddle body 224 reaches a specified position, the side with a larger width of the paddle controller 221 is inserted into one of the clamping grooves 212.

[0058] Specifically, as Figure 3 and Figure 5 shown, in order to ensure that the paddle mechanism 22 and the channel expander 21 can be smoothly clamped, the paddle controller 221 is designed as a T-shaped thin plate. In this way, when the position needs to be moved, the part with a smaller width can be moved in the through groove 211. When it moves to the specified position, the part with a larger width can be pushed towards the inner side of the channel expander 21 so that it is clamped in the clamping groove 212, and thus the paddle mechanism 22 can be clamped in the channel expander 21.

[0059] For a further optimized solution, the paddle body 224 is a block formed by a quarter-circular structure.

[0060] Specifically, as Figure 6 shown, the part of the paddle body 224 away from the rod body 222 is in a sharp-corner shape while the bottom is in an arc shape. In this way, it can not only ensure smooth cutting but also cut out a semi-circular structure. When bone cement is injected, the bone cement will move towards both sides of the arc-shaped structure, making the injected bone cement more uniform. And during the flowing process, the bone cement will slowly harden to form a certain shape, enhancing the stability of the fractured vertebra and improving the treatment effect. The paddle body 224 can be located on one side of the rod body 222 or distributed on both sides. When distributed on both sides, it can be evenly distributed or staggeredly distributed.

[0061] For a further optimized solution, the channel expander 21 includes a channel body 213 and a head 214 installed thereon.

[0062] Specifically, as Figure 1 shown, the head 214 can be a spherical structure, or a square or columnar structure. And the head 214 can be an integrally formed structure with the channel body 213. For the convenience of disassembly, it can also be designed in a snap-fit installation form, just like the installation form of a pen and a pen cap.

[0063] For a further optimized solution, the elastic member 223 is preferably a spring.

[0064] For a further optimized solution, the puncture guiding mechanism 1 is a puncture guide 11.

[0065] To solve the above technical problems, the present invention also discloses a method for using a minimally invasive bone cement device for anterior and posterior approaches of thoracolumbar fractures, and the specific steps are as follows:

[0066] Implant the puncture guiding mechanism 1 into the fractured vertebral body: Through the real-time imaging navigation system, fluoroscopically locate the target fractured vertebral body, and pass the puncture guiding mechanism 1 through the pedicle or the side of the vertebral body to reach the fractured vertebral body;

[0067] Implant the bone cement mechanism 2: Pass the channel dilator 21 through the puncture guiding mechanism 1 and continue to puncture forward. Press the dial mechanism 22 until reaching the fractured vertebral body, then insert the dial mechanism 22 onto the channel dilator 21, rotate the channel dilator 21 360°, form a specific shape in the fractured vertebral body, release the dial mechanism 22, and pull out the channel dilator 21;

[0068] Inject bone cement: Insert the bone cement high-pressure injector tube body 33 along the puncture guiding mechanism 1. After reaching, implant the bone cement sac 31, inject bone cement through the bone cement high-pressure injector interface 32. After completion, pull out the above-mentioned devices in sequence to complete the minimally invasive surgery.

[0069] Embodiment 2

[0070] As Figures 9 - 10 shown, the difference from Embodiment 1 is only that the dial body 224 is a semi-elliptical structure.

[0071] Specifically, as Figure 9 and Figure 10 shown, the finally formed shape is an elliptical structure, which is equivalent to an arc structure both above and below. When injecting bone cement, due to the existence of the arc structure, the flow rate of the bone cement is relatively slow and more evenly distributed, which can better ensure the later surgical effect and enhance the strength of the fractured vertebral body. In addition, as Figure 10 shown, its distribution can be on one side of the rod body 222, or on both sides, and can be symmetrically distributed or staggered. If it is symmetrically distributed, it can reach a specific shape faster during the cutting process, while both the staggered and one-side distribution forms require a 360-degree rotation to complete.

[0072] Embodiment 3

[0073] As Figures 11 - 12 shown, the difference from Embodiment 1 is only that the outer contour of the dial body 224 consists of a protruding section 2211, a concave section 2212, a protruding section 2211, and an arc section 2213, where the arc section 2213 is located below the protruding section 2211 and the concave section 2212.

[0074] Specifically, as Figure 11 and Figure 12 shown, such a shape result can make the flow rate of the injected bone cement slower and the distribution more uniform. Similarly, its distribution can be on one side of the rod 222 or on both sides, and can be symmetrically distributed or staggered. In the case of symmetrical distribution, a specific shape can be achieved faster during the cutting process, while both the staggered and one-side distribution forms require a 360-degree rotation to complete.

[0075] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0076] The embodiments described above are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A minimally invasive bone cement device for anterior and posterior approaches of thoracolumbar fractures, characterized in that: Comprising: A puncture guiding mechanism (1), during puncture, under the real-time imaging navigation system, the puncture guiding mechanism (1) can accurately locate the fractured vertebral body and plan the puncture path; A bone cement mechanism (2), including a channel dilator (21), a flipper mechanism (22) is detachably installed in the channel dilator (21), the flipper mechanism (22) includes a flipper controller (221) inserted into the channel dilator (21), a rod body (222) is fixedly connected below the flipper controller (221), a flipper body (224) is fixedly connected below the rod body (222), a block Ⅰ (225) is fixedly connected to the rod body (222), a block Ⅱ (226) is fixedly installed on the inner wall of the channel dilator (21), and during puncture, the rod body (222) penetrates through the block Ⅱ (226), and an elastic member (223) is fixedly installed between the block Ⅰ (225) and the block Ⅱ (226); wherein, during minimally invasive surgery, pressing the flipper controller (221) to penetrate the flipper body (224) outside the channel dilator (21) body until reaching the fractured vertebral body, inserting the flipper controller (221) into the channel dilator (21), and rotating the channel dilator (21) to make the flipper body (224) form a specific shape within the fractured vertebral body; the bottom of the flipper body (224) is an arc structure; A bone cement injection mechanism (3), including a bone cement high-pressure injector interface (32), a bone cement high-pressure injector tube body (33) and a bone cement sac (31), the bone cement high-pressure injector interface (32) and the bone cement high-pressure injector tube body (33) are integrally formed structures, several branch short tubes (34) are arranged outside the bone cement high-pressure injector tube body (33), the bone cement sac (31) is sleeved on the branch short tubes (34), after injecting bone cement, the bone cement sac (31) detaches from the branch short tubes (34), and the bone cement sac (31) is consistent with the specific shape formed within the fractured vertebral body.

2. The minimally invasive bone cement device for the anterior and posterior approaches of thoracolumbar fractures according to claim 1, wherein: The flipper controller (221) is a T-shaped thin sheet, wherein the width of the flipper controller (221) located inside the channel dilator (21) is smaller than the width located outside the channel dilator (21).

3. The minimally invasive bone cement device for anterior and posterior approaches of thoracolumbar fractures according to claim 2, wherein: A through slot (211) is opened on the channel dilator (21), during minimally invasive surgery, the side with a smaller width of the flipper controller (221) moves along the through slot (211). Several card slots (212) are opened on the channel dilator (21), and the card slots (212) are located on both sides of the through slot (211), during minimally invasive surgery, when the flipper body (224) reaches the specified position, the side with a larger width of the flipper controller (221) is inserted into one of the card slots (212).

4. The minimally invasive bone cement device for the anterior and posterior approaches of thoracolumbar fractures according to claim 1, wherein: The flipper body (224) is a block formed by a quarter-circular structure.

5. The minimally invasive bone cement device for anterior and posterior approaches of thoracolumbar fractures according to claim 1, characterized in that: The channel dilator (21) includes a channel body (213) and a head (214) installed thereon.

6. The minimally invasive bone cement device for the anterior and posterior approaches of thoracolumbar fractures according to claim 1, wherein: The elastic member (223) is preferably a spring.

7. The minimally invasive bone cement device for anterior and posterior approaches of thoracolumbar fractures according to claim 1, wherein: The puncture guiding mechanism (1) is a puncture guide (11).

8. The minimally invasive bone cement device for anterior and posterior approaches of thoracolumbar fractures according to claim 1, characterized in that: The paddle body (224) has a semi-elliptical structure.

9. A method for using a minimally invasive bone cement device for anterior and posterior approaches of thoracolumbar fractures, characterized in that: The specific steps are as follows: Implant the puncture guiding mechanism (1) into the fractured vertebral body: Locate the target fractured vertebral body through fluoroscopy with a real-time imaging navigation system, and insert the puncture guiding mechanism (1) through the pedicle or the side of the vertebral body to reach the fractured vertebral body; Implant the bone cement mechanism (2): Insert the channel dilator (21) and continue to puncture forward through the puncture guiding mechanism (1). Press the paddle mechanism (22) until it reaches the fractured vertebral body, then insert the paddle mechanism (22) onto the channel dilator (21). Rotate the channel dilator (21) 360° to form a specific shape in the fractured vertebral body, release the paddle mechanism (22), and pull out the channel dilator (21); Inject bone cement: Insert the bone cement high-pressure injector tube body (33) along the puncture guiding mechanism (1). After reaching the position, implant the bone cement sac (31), inject bone cement through the bone cement high-pressure injector interface (32). After completion, pull out the above-mentioned devices in sequence to complete the minimally invasive surgery.

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