Component-type anterior thoracolumbar fixation system

Abstract

The present invention discloses a component-type anterior thoracolumbar internal fixation system, which relates to the technical field of medical devices and solves the problems that common implants are expensive and the products generally have the disadvantages of being single in product, rough in workmanship, and mostly made of stainless steel. The key points of its technical solution are as follows: it includes a mounting gasket, a fastener for screwing into the vertebral body, a connecting member and a locking block; a mounting groove is provided on the mounting gasket, and both sides of the connecting member are matched and installed in the mounting groove; a main mounting column is provided on the mounting gasket; the fastener passes through the connecting member and is threadedly connected to the main mounting column; the locking block is threadedly connected to the outer wall of the main mounting column and abuts against the side of the connecting member, so that the intraoperative operation is simple and convenient, the notch of the internal fixation device is effectively reduced, and the risk of high-profile implants affecting other organs or tissues at the anterior edge of the vertebral body is reduced. The overall applicability is strong, the application range of the product is greatly improved, and it has the purpose of good economic practicality.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a component-type anterior thoracolumbar internal fixation system. Background Art

[0002] With the changes in human living habits and lifestyles, spinal diseases related to spinal fractures, tumors, infections and degenerative diseases are prevalent. Although a large number of new technologies and methods are emerging for the treatment of the above diseases, for patients with more serious conditions, the choice of treatment still tends to be surgical treatment. In the surgical reconstruction treatment of spinal diseases, it is usually divided into anterior surgery and posterior surgery. The fundamental difference lies in whether to expose the vertebral body from the front or side to treat the lesion or to expose the lamina from the back and remove the lamina to treat the lesion. These two surgical methods each have their own unique advantages and indications, and there is no superiority or inferiority.

[0003] However, since the anterior approach to thoracolumbar surgery is relatively more complicated than the posterior approach, involving more structures such as thoracic and abdominal organs and important blood vessels, and the surgical technique is more difficult, most cases suitable for anterior surgery are still operated on by the posterior approach. In fact, it is often difficult to achieve satisfactory results for certain lesions of the thoracolumbar spine, such as vertebral tumors, disc herniation or ossification above the L1 segment, and vertebral tuberculosis, without an anterior approach. However, internal fixation after lesion removal and intervertebral bone grafting can reconstruct the stability of the spine. From a mechanical point of view, anterior internal fixation mainly plays the role of a support belt, while posterior internal fixation mainly plays the role of a tension belt. In terms of maintaining the height of the anterior column of the spine, anterior internal fixation is more reliable. It is generally believed that the indications for anterior fixation include: vertebral tumors, vertebral burst fractures with bone fragments protruding into the spinal canal more than 1 / 2 (i.e., posterior longitudinal ligament rupture), disc removal or bone grafting after removal of ossified posterior longitudinal ligament in segments above L1, old compression fractures of the thoracolumbar segment causing compression of the anterior spinal cord, and other vertebral lesions, such as tuberculosis lesion removal and bone grafting. The application of anterior thoracolumbar fixation technology enables the spine to be stabilized immediately after lesion removal or spinal cord decompression, which provides the possibility for early postoperative rehabilitation of patients on the one hand, and creates the necessary conditions for the protection or recovery of neurological function on the other hand. Existing relevant literature shows that early stabilization of the spine is of great significance in the treatment of spinal cord injury. After anterior thoracolumbar fixation, patients can start functional exercises early, and neurological function is significantly improved.

[0004] However, due to various reasons, the development of anterior thoracic and lumbar spine surgery lags behind that of posterior surgery. At the same time, the research and development and production of anterior implant products also lag behind those of posterior implant products. At present, the anterior spinal internal fixation products used in clinical practice in China mainly come from internal fixation instruments produced by foreign manufacturers. These implants are mainly based on the anatomical data of foreigners during the development process. Therefore, in the process of product design, the product is not suitable for the anatomical characteristics of Chinese people and the operating habits of the surgeon. The implant price is quite expensive, resulting in a certain degree of waste of medical resources. Some domestic products generally have the disadvantages of single product, rough process, and most of them use stainless steel materials. Some even directly use the posterior nail rod system to carry out anterior-related surgeries. This simple and rough method is not suitable for the rapidly developing spinal implant industry. Summary of the invention

[0005] The purpose of the present invention is to provide a modular anterior thoracolumbar internal fixation system, which has the advantages of simple and convenient operation during surgery, effectively reducing the notch of the internal fixation device, and reducing the risk of high-profile implants affecting other organs or tissues at the anterior edge of the vertebral body. It has strong overall applicability, greatly improves the application range of the product, and has good economic and practical advantages.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a modular thoracolumbar anterior internal fixation system, comprising a mounting gasket for stabilizing the vertebral body, at least two fasteners, a connecting member for bearing weight and through which the fasteners can pass, and a locking block; the mounting gasket is provided with at least two mounting grooves matching the connecting member, and both sides of the connecting member are matched and installed in the mounting grooves; the mounting gasket is provided with a main mounting column located between adjacent mounting grooves; the number of the locking blocks corresponds to the fasteners, and after the fasteners pass through the connecting member, the locking blocks are respectively threadedly connected to the outer wall of the end of the main mounting column protruding from the connecting member, and the locking block is threadedly locked and abuts against the side of the connecting member facing away from the mounting gasket.

[0007] According to a further configuration of the present invention, the fastener includes an auxiliary screw for enhancing the supporting strength during the correction process, the mounting gasket is provided with at least one auxiliary mounting hole, and the auxiliary screw is threadedly connected and passes through the auxiliary mounting hole and then screwed into the vertebral body.

[0008] By adopting the above technical solution, before the operation, the connecting components, fasteners and installation gaskets of appropriate specifications are selected according to the actual situation of the patient; then, according to the patient's condition, the diseased segment is resected according to the conventional anterior thoracolumbar surgery operation process, and the vertebral morphology is reconstructed using autologous bone, allogeneic bone or other artificial prosthesis; then, the installation gaskets of appropriate specifications are put on the selected fasteners, and the fasteners are inserted into the vertebral body at a suitable angle; then, the insertion position of the fasteners is clarified through the C-arm fluoroscopic anteroposterior and lateral views of the surgical segment. If the insertion position of the fasteners is not good, the screw can be used for repair. The insertion position of the fastener is adjusted by the nail. If the insertion position of the fastener is appropriate, the fastener and the auxiliary screw can be fixed on the vertebral body after adjusting the inclination angle of the mounting gasket relative to the vertebral body; then, a connecting component of appropriate length is selected and matched and installed in the mounting groove on the mounting gasket; then, the locking block is threadedly installed on the main mounting column and pressed against the connecting component to lock the mounting gasket and the connecting component into one; finally, after repeated X-ray and confirmation that the implant position in the vertebral body is good, the vertebral body reconstruction and internal fixation installation are completed, and then the operation can be completed according to the normal surgical operation process.

[0009] According to a further configuration of the present invention, the mounting gasket is a transverse gasket, and the mounting groove and the auxiliary mounting hole are respectively located on both sides of the main mounting column along the axial direction of the mounting groove.

[0010] By adopting the above technical solution, the transverse gasket is used to adapt to the vertebral body with a larger surface area, and the mounting groove is arranged between the main mounting column and the auxiliary mounting hole, which can effectively improve the firmness of the connecting member on the mounting groove to fix the transverse gasket.

[0011] According to a further configuration of the present invention, the mounting gasket is a longitudinal gasket, and the two mounting grooves are respectively located on both sides of a direction of a center line connecting the main mounting column and the auxiliary mounting hole.

[0012] By adopting the above technical solution, the longitudinal gasket is mainly used for vertebrae with smaller surface areas or lateral approach surgeries with smaller wound surfaces, so as to adapt to different vertebrae, thereby effectively improving the scope of application of the technical solution.

[0013] According to a further configuration of the present invention, the fastener includes a universal screw and a built-in block, the universal screw includes a first tail portion, a first rod body and a first head portion for tightening which are arranged in sequence along the axial direction of the universal screw and used to screw into the vertebral body, and the first head portion is spherical; the built-in block is threadedly connected to the main mounting column, and a spherical groove matching the first head portion is formed at the end of the built-in block, and the spherical groove is slidably connected to the first head portion of the universal screw.

[0014] By adopting the above technical solution, the first head of the universal screw is spherical, so when the first tail and the first rod body are inserted into the vertebral body, a conical movement can be formed between the mounting gasket, so as to effectively adjust the inclination angle between the universal screw and the vertebral body after the universal screw is inserted into the vertebral body.

[0015] According to a further configuration of the present invention, a side of the mounting gasket facing away from the locking block is provided with a plurality of spikes for piercing the vertebral body.

[0016] By adopting the above technical solution, the side of the installation gasket facing away from the locking block is the contact surface with the spine. Therefore, the spikes that pierce the vertebral body can effectively improve the stability of the installation gasket when it is installed on the contact surface of the spine, and at the same time can effectively share the local stress of the fastener to reduce the chance of the fastener loosening.

[0017] According to a further configuration of the present invention, the fastener includes a fixing screw, which includes a second tail portion, a second rod body and a second head portion which are sequentially arranged along the axial direction of the fixing screw; after the second tail portion and the second rod body pass through the main mounting column, the second head portion is threadedly connected to the inside of the main mounting column.

[0018] By adopting the above technical solution, when the second tail of the fixing screw and the second rod body are inserted into the vertebral body, the second head threadedly connected to the inside of the main mounting column can be fixedly locked with the mounting gasket, so that the fixing screw can firmly fix the mounting gasket to the surface of the installed vertebral body.

[0019] According to a further configuration of the present invention, the connecting member comprises a connecting plate, and the connecting plate is provided with sliding parts matching the mounting groove on both sides of the axial direction of the mounting groove, and the connecting plate is mounted in the mounting groove by matching the sliding parts.

[0020] By adopting the above technical solution, the connecting plate can be used to bear the weight of the product, and the sliding part can facilitate the installation of the connecting plate in the installation groove, so as to improve the installation of the connecting plate during surgery. The convenient installation method can effectively reduce the time required for the operation, thereby reducing the impact on the patient caused by the prolonged operation time.

[0021] According to a further configuration of the present invention, the connecting member comprises two connecting rods matching the mounting grooves, and the two connecting rods are respectively matched and mounted on the mounting grooves.

[0022] By adopting the above technical solution, the rod-shaped connecting rod can be cut to any length according to the intraoperative situation, so as to adapt to different surgical situations.

[0023] According to a further configuration of the present invention, there are at least two mounting gaskets, which are respectively arranged at both end sides of the connecting member along the axial direction of the connecting member, and the openings of the mounting grooves on the mounting gaskets face the same direction.

[0024] By adopting the above technical solution, at least two mounting gaskets can further increase the contact area with the vertebral body, and the locking block can lock the mounting gasket and the connecting member together to reduce the chance of loosening of the above two after being inserted into the vertebral body, thereby improving the stability of the technical solution.

[0025] In summary, the present invention has the following beneficial effects:

[0026] 1. The intraoperative operation is simple and convenient. It can be installed by combining various components, which effectively reduces the notch of the internal fixation device and reduces the risk of high-notch implants affecting other organs or tissues at the front edge of the vertebral body;

[0027] 2. The overall applicability is strong. Through modular design, the product can replace fasteners and connecting components according to the specific needs of support strength and correction force during surgery, which greatly improves the application range of the product;

[0028] 3. Based on the anatomical data of the thoracic and lumbar vertebrae of the Chinese people, the physiological angles and sizes of internal fixation devices that are more compatible with the vertebrae of the Chinese people are designed, which reduces the mismatch of the application of imported implants in the Chinese people;

[0029] 4. The structure is simple and the manufacturing cost is low, which can effectively reduce the medical expenses of patients' surgery. It not only has good economic practicality, but also reduces the expenditure of national medical resources and promotes the healthy development of the medical industry.

[0030] In general, the present invention is simple and convenient to operate during surgery, effectively reduces the notch of the internal fixation device, reduces the risk of high-notch implants affecting other organs or tissues at the anterior edge of the vertebral body, has strong overall applicability, greatly improves the application range of the product, and has good economic practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the combined structure of the transverse gasket and the connecting plate in this specific embodiment;

[0032] Figure 2 is a schematic diagram of the combined structure of the longitudinal gasket and the connecting plate in this specific implementation mode;

[0033] Figure 3 This is a schematic diagram of the combined structure of the transverse gasket, the longitudinal gasket and the connecting rod in this specific implementation mode;

[0034] Figure 4 yes Figure 3 A top view of

[0035] Figure 5 yes Figure 4 A-A cross-sectional view;

[0036] Figure 6 is a schematic diagram of the structure of the fixing screw in this specific implementation mode;

[0037] Figure 7 is a schematic diagram of the structure of a universal screw in a specific implementation manner;

[0038] Figure 8 is a schematic diagram of the structure of a longitudinal gasket in a specific implementation manner;

[0039] Fig. 9 Schematic diagram of the structure of the transverse gasket in a specific implementation manner.

[0040] Figure numerals: 1. locking block; 2. mounting groove; 3. connecting member; 31. connecting plate; 311. sliding part; 32. connecting rod; 4. mounting gasket; 41. transverse gasket; 42. longitudinal gasket; 5. fastener; 51. universal screw; 511. first tail; 512. first rod body; 513. first head; 52. built-in block; 521. spherical groove; 6. fixing screw; 61. second tail; 62. second rod body; 63. second head; 7. main mounting column; 8. auxiliary screw; 9. auxiliary mounting hole; 10. spike. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0042] Component-type anterior thoracolumbar fixation system, such as Figures 1 to 9 As shown, Figures 1 to 3 These are three schematic diagrams of the effects of use of this specific implementation, and are not limited to the combination of the longitudinal gasket 42, the transverse gasket 41, the fixing screw 6 and the universal screw 51 in the above figure. Technicians in this field can re-combine and use them in combination with this specific implementation according to actual conditions, which all fall within the scope of protection of the present invention.

[0043] Embodiment 1: A modular anterior thoracolumbar internal fixation system includes a mounting gasket 4 for stabilizing the vertebral body, two fasteners 5, a connecting member 3 for bearing weight and through which the fasteners 5 can pass, and a locking block 1. The main body of the locking block 1 is a conventional hollow hexagonal nut, and its inner thread cooperates with the outer thread of the middle hole groove of the mounting gasket 4 to lock the mounting gasket 4 with the connecting member 3, and the hexagonal non-slip outer edge of the locking block 1 can be used to screw the nut in. The number of locking blocks 1 corresponds to the fasteners 5. After the fasteners 5 pass through the connecting member 3, the locking blocks 1 are respectively threadedly connected to the outer wall of the end of the main mounting column 7 protruding from the connecting member 3, and the locking block 1 is threadedly locked and abuts against the side of the connecting member 3 away from the mounting gasket 4.

[0044] The mounting gasket 4 is provided with two mounting grooves 2 that match the connecting member 3, and the two sides of the connecting member 3 are matched and installed in the mounting grooves 2. The mounting groove 2 is a groove structure with a U-shaped cross section. The mounting gasket 4 is provided with a main mounting column 7 located between adjacent mounting grooves 2. The main mounting column 7 is a boss structure that protrudes along the side of the mounting gasket 4 perpendicularly. The main mounting column 7 is provided with an internal thread along the axial direction, and the fastener 5 passes through the connecting member 3 and is threadedly connected to the main mounting column 7. The locking block 1 is threadedly connected to the outer wall of the main mounting column 7 and abuts against the side of the connecting member 3.

[0045] The mounting gasket 4 is provided with one auxiliary mounting hole 9, and the auxiliary mounting hole 9 is provided with internal threads along the axial direction. The auxiliary screw 8 is threadedly connected to the inside of the auxiliary mounting hole 9 and then screwed into the vertebral body.

[0046] The fastener 5 includes an auxiliary screw 8. The auxiliary screw 8 is a conventional screw with a cylindrical head, which is used to enhance the support strength during the correction process. The head of the auxiliary screw 8 is provided with a plum blossom-shaped groove, which is used to drive the auxiliary screw 8 to rotate and screw in with the help of a tool. There are two mounting gaskets 4 and they are arranged at both ends of the connecting member 3 through the fastener 5, and the two locking blocks 1 are arranged on the same side of the connecting member 3. The locking block 1 can lock the mounting gasket 4 and the connecting member 3 together to reduce the probability of loosening of the above two after being inserted into the vertebral body, thereby improving the stability of the present technical solution.

[0047] The side of the installation gasket 4 facing away from the locking block 1 is provided with a plurality of spikes 10 for piercing the vertebral body. The spikes 10 are conical thorn-like structures. The side of the installation gasket 4 facing away from the locking block 1 is the contact surface with the spine, so the spikes 10 piercing the vertebral body can effectively improve the stability of the installation gasket 4 when it is installed on the contact surface of the spine, and can effectively share the local stress of the fastener 5 to reduce the probability of the fastener 5 becoming loose.

[0048] The fastener 5 is a fixing screw 6, which includes a second tail portion 61, a second rod body 62 and a second head portion 63 which are sequentially arranged along the axial direction of the fixing screw 6, and the second head portion 63 is threadedly connected to the inside of the main mounting column 7. The fixing screw 6 is a conventional screw structure. When the second tail portion 61 and the second rod body 62 of the fixing screw 6 are inserted into the vertebral body, the second head portion 63 threadedly connected to the inside of the main mounting column 7 can be fixedly locked with the mounting gasket 4, so that the fixing screw 6 can firmly fix the mounting gasket 4 to the surface of the installed vertebral body. The universal screw 51 and the fixing screw 6 can be used interchangeably according to the actual situation during the operation.

[0049] The mounting gasket 4 is a transverse gasket 41, and the mounting groove 2 and the auxiliary mounting hole 9 are respectively located on both sides of the main mounting column 7 along the axial direction of the mounting groove 2. The transverse gasket 41 is used to adapt to the vertebral body with a larger surface area, and the mounting groove 2 is arranged between the main mounting column 7 and the auxiliary mounting hole 9, which can effectively improve the firmness of the connecting member 3 on the mounting groove 2 to fix the transverse gasket 41. The axis of the main mounting column 7 and the auxiliary mounting hole 9 of the transverse gasket 41 forms an angle of five degrees, but is not limited to five degrees, so as to adapt to the physiological curvature when contacting the vertebral body.

[0050] The connecting member 3 is a connecting plate 31. The connecting plate 31 is provided with sliding parts 311 matching the mounting groove 2 on both sides of the axial direction of the mounting groove 2. The connecting plate 31 is matched and installed in the mounting groove 2 through the sliding parts 311. The connecting plate 31 can be used for bearing the weight of the product. The sliding parts 311 can facilitate the installation of the connecting plate 31 in the mounting groove 2, so as to improve the installation of the connecting plate 31 during the operation. The convenient installation method can effectively reduce the time required for the operation, thereby reducing the impact on the patient caused by the long operation time.

[0051] Embodiment 2: Embodiment 2 differs from Embodiment 1 in that the mounting gasket 4 can also be a longitudinal gasket 42. In this embodiment, the two mounting grooves 2 are respectively located on both sides of the center line of the main mounting column 7 and the auxiliary mounting hole 9. The longitudinal gasket 42 is mainly used for lateral approach surgeries with smaller surface areas of vertebrae or smaller wound surfaces, so as to adapt to different vertebrae, thereby effectively improving the scope of application of the present technical solution. The axes of the main mounting column 7 and the auxiliary mounting hole 9 on the longitudinal gasket 42 are parallel. The longitudinal gasket 42 and the transverse gasket 41 can be used in combination with each other, such as a combination of two longitudinal gaskets 42, two transverse gaskets 41, and one longitudinal gasket 42 and a transverse gasket 41.

[0052] Embodiment 3: Embodiment 3 is different from Embodiment 1 in that the fastener 5 can also be a universal screw 51 and a built-in block 52. The main structure of the built-in block 52 is a conventional screw plug, the inner side of which is a plum blossom-shaped groove, which can be used for screwing the screw plug in, and the outer thread of the built-in block 52 matches the main mounting column 7 on the mounting gasket 4. The universal screw 51 can be limited to any angle within the allowable range of motion, and can also be used to lock the fixing screw mounting piece. The universal screw 51 includes a first tail 511, a first rod body 512, and a first head 513 for tightening, which are arranged in sequence along the axial direction of the universal screw 51 and are used to screw into the vertebral body, and the first head 513 is spherical. The built-in block 52 is threadedly connected to the main mounting column 7, and the end of the built-in block 52 is provided with a spherical groove 521 matching the first head 513 along the axial direction of the built-in block 52, which can be used to fix the universal screw 51 or the fixing screw 6. The spherical groove 521 is slidably connected to the first head 513 of the universal screw 51. Therefore, after the first tail portion 511 and the first rod body 512 are inserted into the vertebral body, a conical motion can be formed between the mounting gasket 4, so as to effectively adjust the inclination angle between the universal screw 51 and the vertebral body after the universal screw 51 is inserted into the vertebral body.

[0053] Embodiment 4: Embodiment 4 is different from Embodiment 1 in that the connecting member 3 can also be two connecting rods 32 matching the mounting groove 2, and the two connecting rods 32 are respectively matched and mounted on the mounting groove 2. The rod-shaped connecting rod 32 can be cut to any length according to the intraoperative situation to adapt to different surgical situations. In this embodiment, the connecting plate 31 and the connecting rod 32 can be used interchangeably according to the actual situation during the operation.

[0054] Usage method and working process: First, determine the surgical segment and formulate a surgical plan based on the patient's anterior X-ray, CT, MRI and other related imaging data. If necessary, use digital reconstruction software to perform virtual surgery; according to the surgical plan, roughly estimate the surgical segment and vertebral height data; then before the operation, select the appropriate specifications of the connecting component 3, fastener 5 and installation gasket 4 according to the actual situation of the patient; then, according to the patient's condition, complete the resection of the diseased segment in accordance with the conventional anterior thoracolumbar surgery operation process, and use autologous bone, allogeneic bone or other artificial prosthesis to reconstruct the vertebral morphology; then, put the selected installation gasket 4 with the appropriate specifications on the selected fastener 5, and insert the fastener 5 into the vertebral body at a suitable angle; then, through the C-arm fluoroscopy, The anteroposterior and lateral views of the surgical segment clearly indicate the insertion position of the fastener 5. If the insertion position of the fastener 5 is not good, the insertion position of the fastener 5 can be adjusted by using a remedial screw. If the insertion position of the fastener 5 is appropriate, the fastener 5 and the auxiliary screw 8 can be fixed to the vertebral body after adjusting the inclination angle of the mounting gasket 4 relative to the vertebral body; then, a connecting member 3 of a suitable length is selected and matched and installed in the mounting groove 2 on the mounting gasket 4; then, the locking block 1 is threadedly installed on the main mounting column 7 and pressed against the connecting member 3 to lock the mounting gasket 4 and the connecting member 3 into one; finally, after repeated perspective and confirmation that the implant position in the vertebral body is good, the vertebral body reconstruction and internal fixation installation are completed, and then the operation can be completed according to the normal surgical operation process.

[0055] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A modular thoracolumbar anterior internal fixation system, characterized in that: The invention comprises a mounting gasket (4) for stabilizing a vertebral body, at least two fasteners (5), a connecting member (3) for bearing weight and through which the fasteners (5) can pass, and a locking block (1); the mounting gasket (4) is provided with at least two mounting grooves (2) matching the connecting member (3), and the two sides of the connecting member (3) are matched and installed in the mounting grooves (2); the mounting gasket (4) is provided with a main mounting column (7) located between adjacent mounting grooves (2); the number of the locking blocks (1) corresponds to the fasteners (5), and after the fasteners (5) pass through the connecting member (3), the locking blocks (1) are respectively threadedly connected to the outer wall of the end of the main mounting column (7) protruding from the connecting member (3), and the locking blocks (1) are threadedly locked and abut against the side of the connecting member (3) facing away from the mounting gasket (4); The fastener (5) comprises an auxiliary screw (8) for enhancing the supporting strength during the correction process, and the mounting gasket (4) is provided with at least one auxiliary mounting hole (9), and the auxiliary screw (8) is threadedly connected and passes through the auxiliary mounting hole (9) and then screwed into the vertebral body; The mounting gasket (4) comprises a transverse gasket (41), the mounting groove (2) and the auxiliary mounting hole (9) are respectively located on both sides of the main mounting column (7) along the axial direction of the mounting groove (2); and the mounting gasket (4) comprises a longitudinal gasket (42), the two mounting grooves (2) are respectively located on both sides of the center line of the main mounting column (7) and the auxiliary mounting hole (9); The connecting member (3) comprises a connecting plate (31), and the connecting plate (31) is provided with sliding parts (311) matching the mounting groove (2) on both sides of the axial direction of the mounting groove (2), and the connecting plate (31) is matched and installed in the mounting groove (2) through the sliding parts (311); or, the connecting member (3) comprises two connecting rods (32) matching the mounting groove (2), and the two connecting rods (32) are matched and installed on the mounting groove (2) respectively; The number of the mounting gaskets (4) is at least two, and the mounting gaskets (4) are respectively arranged on the two end sides of the connecting member (3) along the axial direction of the connecting member (3), and the openings of the mounting grooves (2) on the mounting gaskets (4) face the same direction.

2. The modular anterior thoracolumbar internal fixation system according to claim 1, characterized in that: The fastener (5) comprises a universal screw (51) and a built-in block (52); the universal screw (51) comprises a first tail portion (511), a first rod body (512) and a first head portion (513) for tightening, which are arranged in sequence along the axial direction of the universal screw (51) and are used to be screwed into the vertebral body; the first head portion (513) is spherical; the built-in block (52) is threadedly connected to the main mounting column (7); a spherical groove (521) matching the first head portion (513) is formed at the end of the built-in block (52); the spherical groove (521) is slidably connected to the first head portion (513) of the universal screw (51).

3. The modular anterior thoracolumbar internal fixation system according to claim 1, characterized in that: The side of the mounting gasket (4) facing away from the locking block (1) is provided with a plurality of spikes (10) for piercing the vertebral body.

4. The modular anterior thoracolumbar internal fixation system according to claim 1, characterized in that: The fastener (5) comprises a fixing screw (6), and the fixing screw (6) comprises a second tail portion (61), a second rod body (62), and a second head portion (63) which are sequentially arranged along the axial direction of the fixing screw (6); after the second tail portion (61) and the second rod body (62) pass through the main mounting column (7), the second head portion (63) is threadedly connected to the inside of the main mounting column (7).

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