Scoliosis correcting device

Abstract

The invention relates to the technical field of medical machinery, and discloses a scoliosis correcting device. The scoliosis correcting device comprises a plurality of pedicle screws and a plurality of connecting rods, the pedicle screws are used for fixing the flexible orthopedic rod together, the flexible orthopedic rod comprises rod bodies and connecting pieces, the rod bodies are movably connected end to end through the connecting pieces, and the included angle formed by the adjacent rod bodies ranges from 160 degrees to 180 degrees. The connecting pieces capable of being movably connected are arranged between the rod bodies to form the flexible orthopedic rod, a certain natural movement range can be kept while the spine is corrected through the flexible orthopedic rod, the spine has the rotation movement freedom degree, a patient can keep a certain stoop ability, and therefore the patient can have the certain stoop ability. Due to the fact that the flexible orthopedic rod has the movement freedom degree among a plurality of conical sections of the spine, the spine can keep a certain movement freedom degree in the correction process, the movement ability of a patient in daily life can be kept, and the patient can better complete stooping, turning and other activities.

Description

Technical Field

[0001] The present invention relates to the technical field of medical machinery, and in particular to a scoliosis correction device. Background Art

[0002] Scoliosis is a three-dimensional deformity of the spine, including abnormal sequences in the coronal, sagittal and axial planes. Clinically, the degree of scoliosis can be assessed by measuring the Cobb angle through X-rays. When the Cobb angle is >10°-40°, mild non-surgical treatment is performed; when the Cobb angle is >40°-60°, moderate surgical treatment is performed; when the Cobb angle is >60°-80°, moderate to severe surgical treatment is performed; and when the Cobb angle is >80°, severe surgical treatment is performed. Scoliosis can cause spinal deformity, hunchback, uneven shoulders and back, chest deformity, pelvic tilt, unequal length of lower limbs, and decreased height, which seriously affects the patient's appearance and causes muscle and joint pain. In severe cases, it can lead to a decrease in chest volume, compression of the heart and lungs, abnormal cardiopulmonary development and function, and motor ability far below that of peers.

[0003] Fusion surgery is usually used clinically to treat scoliosis fundamentally, but before fusion surgery, a small number of scoliosis patients can be treated with non-fusion surgery. Non-fusion surgery includes implant rods, guided growth implants, and anterior vertebral tethering. Implant rods use magnetically controlled self-adjusting rods to act as internal brackets to help correct the spine; and the rod design has two multi-axial joints, allowing a greater degree of movement; at the same time, the self-adjusting rod allows additional postoperative correction over time and can adapt to further growth, making it possible to treat both skeletally immature and skeletally mature adolescent patients. Guided growth implants are designed to treat children under 10 years old whose bones are not yet mature. They can correct deformities while maintaining the correction effect over time, minimizing the need for regular extension surgery; and guided growth implants use unique non-locking fixation screws in the proximal and distal parts of the structural rod. This special feature allows the rod to slide over the screw head as the child's spine grows while still correcting the spinal deformity. Anterior vertebral tethering uses a minimally invasive method to place screws and ties along the outside of the spinal curvature and extend as the child grows.

[0004] It is true that a small number of scoliosis patients can be intervened to a certain extent through non-fusion surgery in the early stage, but the above non-fusion surgeries all use metal rods to straighten the spine, which will limit the natural left-right movement of the spine, making it difficult for the patient's spine to bend and move; and more importantly, the vast majority of scoliosis patients will eventually need fusion surgery to achieve a fundamental therapeutic effect. Fusion surgery includes but is not limited to posterior fusion with or without instrumented correction, anterior-posterior combined fusion, anterior-posterior combined convex hemi-epiphysis block, and hemivertebral resection. All of these will make the patient's spine fixed and stiff, making it difficult for the spine to move. There may also be postoperative complications such as unfused bone grafts and bending of the fusion site. Therefore, there is still a lack of a device in clinical practice that can truly save scoliosis patients from fusion surgery and allow the spine to move. Summary of the invention

[0005] The technical problem to be solved by the present invention is to solve the problem that the patient's spine is difficult to bend.

[0006] In order to solve the above technical problems, the present invention provides a scoliosis correction device, comprising: a plurality of pedicle screws; a flexible orthopedic rod, wherein the plurality of pedicle screws jointly fix the flexible orthopedic rod, the flexible orthopedic rod comprises a rod body and a connecting piece, the plurality of rod bodies are movably connected end to end through the connecting piece, and the angle formed by adjacent rod bodies ranges from 160° to 180°.

[0007] Furthermore, the connecting member includes a hinge shell and a first ball head rod, and both ends of the hinge shell are provided with spherical grooves or first spherical cavities matching the first ball head rod, and the hinge shell is connected to the rod body through the first ball head rod.

[0008] Furthermore, the pedicle screw comprises a screw body and a screw cap, wherein the screw cap is arranged on the screw body, the screw cap is provided with a through hole matched with the size of the hinge housing, and the hinge housing is located at the through hole.

[0009] Furthermore, the pedicle screw includes a screw body, a screw cap and a second ball head rod, the hinge shell is also provided with a second spherical cavity, one end of the second ball head rod is provided with a ball head matching the second spherical cavity, the other end of the second ball head rod is arranged on the screw cap, and the screw cap is arranged on the screw body.

[0010] Furthermore, the first ball head rod and the nail body are perpendicular to each other.

[0011] Furthermore, the connecting member includes a hinge shell and a first ball head rod, the hinge shell is provided with a first spherical cavity, the first ball head rod is adapted to the first spherical cavity, and the first ball head rod and the hinge shell are respectively arranged on both ends of the rod body.

[0012] Furthermore, the hinge housing is provided with a limiting groove, the limiting groove is communicated with the first spherical cavity, and the limiting groove is used to limit the rotation range of the first ball head rod.

[0013] Furthermore, the limiting groove limits the rotatable angle range of the first ball head rod to 0° to 20°.

[0014] Furthermore, the connecting member includes a pin seat body and a pin, the pin seat body is provided with a pin hole for installing the pin, the pin is located at the pin hole, a plurality of the connecting members are provided between the pedicle screws, and adjacent pins are perpendicular to each other.

[0015] Furthermore, the pedicle screw includes a nail body, a nail seat and a fastening stud, the nail body is rotatably connected to the inner bottom end of the nail seat, the threaded section of the nail body is located below the nail seat, symmetrical through grooves are provided on both sides of the nail seat, and a threaded groove is provided on the inner side of the top of the nail seat, the fastening stud is threadedly connected to the threaded groove, and the rod body is clamped between the nail body and the fastening stud.

[0016] Compared with the prior art, the scoliosis correction device of the embodiment of the present invention has the following beneficial effects: by providing a movably connected connector between the rod bodies to form a flexible orthopedic rod, the spine can be corrected with the help of the flexible orthopedic rod while retaining a certain natural range of motion, the spine has a rotational freedom of motion, and the patient maintains a certain bending ability. Since the flexible orthopedic rod has a certain degree of freedom of motion between multiple cones of the spine, the scoliosis correction device can more accurately adapt to the patient's spinal curvature, the spine can retain a certain degree of freedom of motion during the correction process, the patient's motor ability in daily life will be retained, and the patient can better complete activities such as bending and turning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a first stereoscopic view of the scoliosis correction device provided by the present invention;

[0018] Figure 2 is a first bottom view of the scoliosis correction device provided by the present invention;

[0019] Figure 3 is a side view of the scoliosis correction device provided by the present invention;

[0020] Figure 4is a second bottom view of the scoliosis correction device provided by the present invention;

[0021] Figure 5 is a second stereoscopic view of the scoliosis correction device provided by the present invention and a disassembled view of the flexible correction rod;

[0022] Figure 6 is a third stereoscopic view of the scoliosis correction device provided by the present invention and a disassembled view of the flexible correction rod;

[0023] Figure 7 is a fourth stereoscopic view of the scoliosis correction device provided by the present invention;

[0024] Figure 8 is a fifth stereoscopic view and disassembled view of the scoliosis correction device provided by the present invention;

[0025] The corresponding relationship between the reference numerals and the component names is as follows:

[0026] 1. Pedicle screw; 11. Screw body; 12. Screw cap; 13. Second ball head rod; 14. Screw seat; 15. Fastening stud; 101. Through hole;

[0027] 2. Flexible orthopedic rod; 21. Rod body; 22. Connector; 21. Hinge housing; 22. First ball head rod; 23. Pin seat body; 24. Pin; 201. Spherical through groove; 202. First spherical cavity; 203. Limiting groove. DETAILED DESCRIPTION

[0028] The following is a description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be appreciated by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope of the present invention. Similarly, for clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0029] like Figures 1 to 8 As shown, an embodiment of the present invention discloses a scoliosis correction device, comprising: a plurality of pedicle screws 1 and a flexible correction rod 2.

[0030] Among them, multiple pedicle screws 1 jointly fix the flexible orthopedic rod 2, which includes a rod body 21 and a connector 22. The multiple rod bodies 21 are movably connected end to end through the connector 22, and the angle A formed by adjacent rod bodies 21 ranges from 160° to 180°.

[0031] The scoliosis correction device of the present application is provided with a movably connected connecting piece 22 between the rod body 21 to form a flexible correction rod 2, so that the spine can be corrected with the help of the flexible correction rod 2 while retaining a certain natural range of motion, the spine has a certain degree of freedom of rotation, and the patient maintains a certain bending ability.

[0032] Since the flexible orthopedic rod 2 has a certain degree of freedom of movement between the multiple cones of the spine, the scoliosis correction device can more accurately adapt to the patient's spinal curvature. The spine can retain a certain degree of freedom of movement during the correction process, and the patient's ability to move in daily life will be retained, and he can better complete activities such as bending and turning, thereby improving the quality of life. By making the flexible orthopedic rod 2 consist of multiple rod bodies 21 connected end to end through a connecting piece 22, such as Figure 3 As shown, the angle A formed by adjacent rods 21 ranges from 160° to 180°, so that the spine can maintain the rotational freedom within a certain spatial range between adjacent cone segments while maintaining the correction effect, allowing the spine to move naturally within a certain range, reducing the stiffness caused by traditional fixation devices, better adapting to the natural movement and changes of the body, and providing greater comfort and adaptability. The flexible orthopedic rod 2 enables the scoliosis correction device to adapt to the growth and changes of the spine while ensuring the correction effect, which helps to maintain a good correction effect in long-term use.

[0033] like Figure 1 and Figure 2 As shown, in an optional embodiment of the present invention, the connecting member 22 includes a hinge shell 21 and a first ball head rod 22, and both ends of the hinge shell 21 are provided with a spherical groove 201 or a first spherical cavity 201 matching the first ball head rod 22, and the hinge shell 21 is arranged on both ends of the rod body 21 through the first ball head rod 22.

[0034] By using the cooperation between the hinge housing 21 and the first ball head rod 22, the connecting member 22 can provide flexible freedom of movement, and at the same time allow the scoliosis correction device to be fine-tuned at different angles and directions, so that the spinal correction is more precise and adapts to the natural curvature of the individual spine.

[0035] The first ball head rod 22 cooperates with the spherical groove 201 and the spherical cavity to reduce friction and hard contact points at the connection part, making the scoliosis correction device more comfortable during use and reducing the discomfort that may be caused by traditional rigid connections. Due to the movable structure of the hinge shell 21 and the ball head rod, the scoliosis correction device can maintain the natural freedom of movement of the spine during the correction process. In this way, the patient can retain a certain degree of movement ability during the correction process, such as bending and turning, thereby improving the quality of life. The first ball head rod 22 cooperates with the spherical groove 201 or the spherical cavity to enable the scoliosis correction device to better adapt to the spinal curvature of the individual patient. The connecting member 22 adaptively adjusts the angle of the adjacent rod body 21 according to the spinal curvature, and can accurately adjust the correction angle, thereby achieving a more effective correction effect.

[0036] like Figure 3 and Figure 4 As shown, in an optional embodiment of the present invention, the connecting member 22 includes a hinge shell 21 and a first ball head rod 22, the hinge shell 21 is provided with a first spherical cavity 201, the ball heads of the two first ball head rods 22 are located in a first spherical cavity 201, and the first ball head rods 22 are arranged on both ends of the rod body 21.

[0037] like Figure 1 and Figure 5 As shown, in an optional embodiment of the present invention, the pedicle screw 1 includes a screw body 11 and a screw cap 12 . The screw cap 12 is arranged on the screw body 11 . The screw cap 12 is provided with a through hole 101 which is adapted to the size of the hinge housing 21 . The hinge housing 21 is located at the through hole 101 .

[0038] By matching the through hole 101 on the screw cap 12 with the size of the hinge housing 21, the screw and the hinge housing 21 are precisely connected, the error of the installation of the flexible orthopedic rod 2 is reduced, and the stability and effectiveness are improved. The screw cap 12 allows the screw to be more firmly fixed on the hinge housing 21, thereby increasing the stability of the flexible orthopedic rod 2, helping to maintain the correction effect, and preventing loosening or displacement during the correction process, which affects the correction effect. The through hole 101 can ensure the accurate position of the hinge housing 21 in the screw cap 12, thereby avoiding failures or damages that may be caused by improper connection, and improving safety during use.

[0039] like Figure 7 As shown, in an optional embodiment of the present invention, the pedicle screw 1 includes a screw body 11, a screw cap 12 and a second ball head rod 13, the hinge shell 21 is also provided with a second spherical cavity, one end of the second ball head rod 13 is provided with a ball head matching the second spherical cavity, the other end of the second ball head rod 13 is arranged on the screw cap 12, and the screw cap 12 is arranged on the screw body 11.

[0040] The second ball head rod 13 cooperates with the second spherical cavity, so that the second ball head rod 13 can provide greater joint flexibility. The presence of the ball head allows the screw to be adjusted at different angles and directions, thereby improving the flexibility of spinal correction and adapting to the complex situation of natural curvature of the spine. The ball head equipped at one end of the second ball head rod 13 can be accurately embedded in the second spherical cavity in the hinge housing 21, making it convenient for the pedicle screw 1 to connect and fix the flexible orthopedic rod 2. The cooperation between the nail cap 12 and the nail body 11 and the combination of the second ball head rod 13 increase the stability of the flexible orthopedic rod 2. The screw is connected to the second ball head rod 13 through the nail cap 12, which allows the flexible orthopedic rod 2 to be more firmly fixed on the spine, reducing the risk of displacement or loosening of the flexible orthopedic rod 2 due to movement or load changes.

[0041] like Figure 7 As shown, in an optional embodiment of the present invention, the first ball head rod 22 is perpendicular to the nail body 11. By making the first ball head rod 22 perpendicular to the nail body 11, the scoliosis correction device can distribute force more evenly when bearing the spinal load. The vertical structure makes the force transmission path more direct, which helps to reduce unnecessary lateral stress, thereby improving the stability and support of the device on the spine during the correction process. The vertical configuration of the first ball head rod 22 and the nail body 11 enables the device to maintain a high structural integrity during use, reduces the risk of deformation or damage to the device due to uneven force, and improves the long-term use stability of the device. During surgery, the vertical configuration simplifies the installation and layout of the device. Since the relative positions of the nail body 11 and the first ball head rod 22 are fixed, medical personnel can more intuitively position and install the flexible orthotic rod 2 through the first ball head rod 22, reducing the difficulty and time of operation. By keeping the first ball head rod 22 perpendicular to the nail body 11, the distance between the flexible orthopedic rod 2 and the spine can be reduced, so that the flexible orthopedic rod 2 can fit the spine better at the same nail body 11 height, making it easier to bury the flexible orthopedic rod 2 in a limited space.

[0042] like Figure 6 As shown, in an optional embodiment of the present invention, the connecting member 22 includes a hinge shell 21 and a first ball head rod 22, the hinge shell 21 is provided with a first spherical cavity 201, the first ball head rod 22 is adapted to the first spherical cavity 201, and the first ball head rod 22 and the hinge shell 21 are respectively arranged on both ends of the rod body 21.

[0043] By allowing the first spherical cavity 201 in the hinge housing 21 to cooperate with the first ball head rod 22, the rod body 21 at both ends of the connector 22 is allowed to rotate in multiple directions, providing a larger range of motion and flexibility for the flexible orthopedic rod 2, so that the flexible orthopedic rod 2 can better adapt to the complex curvature of the spine, thereby improving the correction effect. Due to the spherical cooperation between the first ball head rod 22 and the hinge housing 21, the installation and adjustment of the flexible orthopedic rod 2 becomes easier. Medical personnel can more easily position and fix the connector 22, thereby saving surgical time and reducing the complexity of the operation.

[0044] The spherical fit between the hinge housing 21 and the first ball head rod 22 provides a secure connection, reduces the loss of correction effect due to loosening or displacement of device components, increases the long-term stability and durability of the flexible orthopedic rod 2, and improves the durability of the correction effect. The spherical fit makes the transmission of force more uniform and stable, reduces the phenomenon of local stress concentration, and the flexible orthopedic rod 2 can distribute force more evenly when bearing the load of the spine, thereby improving the support effect on the spine during the correction process. The spherical cavity and the ball head rod allow the rod body 21 to be fine-tuned at different angles and directions, increasing the adaptability of the flexible orthopedic rod 2 to different spinal morphologies. This flexibility enables the scoliosis correction device to better meet individualized correction needs and improve the pertinence and accuracy of the correction effect.

[0045] In an optional embodiment of the present invention, the hinge housing 21 is provided with a limiting groove 203 , which is in communication with the first spherical cavity 201 , and the limiting groove 203 is used to limit the rotation range of the first ball head rod 22 .

[0046] By connecting the limit groove 203 with the first spherical cavity 201, the rotation range of the first ball head rod 22 can be accurately controlled, ensuring that the first ball head rod 22 moves within a preset range, which helps to achieve more accurate spinal correction and avoids unstable correction effects caused by excessive rotation. By limiting the rotation range of the first ball head rod 22, the limit groove 203 can effectively prevent the connector 22 from excessive movement or loss of control during spinal correction, helping to protect the spine from excessive force, reducing potential injury risks, and at the same time preventing the spinal range of motion from being too large, ensuring the correction effect.

[0047] By setting the limit groove 203 in the hinge housing 21, the reliability of the flexible orthopedic rod 2 is increased, and the flexible orthopedic rod 2 is ensured to work stably within the preset range of motion, thereby improving the stability of the overall correction effect. The correction effect fluctuation caused by excessive or unpredictable movement of the flexible orthopedic rod 2 is reduced. The limit groove 203 sets a clear rotation range limit, and the limit groove 203 simplifies the adjustment process of the flexible orthopedic rod 2. The operator can more easily set the range of motion of the flexible orthopedic rod 2 by replacing the connector 22 with different limit ranges, reducing the complexity of adjustment and the possibility of operating errors. The connector 22 that limits the rotation range can avoid excessive pressure or discomfort on the patient's spine, making the device more comfortable during use. Postoperative discomfort or pain that may be caused by uncontrolled movement is reduced. The connector 22 with the limit groove 203 increases the safety of the device, and by controlling the rotation range, reduces the risk that may be caused by accidental movement or mechanical failure, thereby providing a higher level of safety protection.

[0048] Specifically, the connecting piece 22 and the rod body 21 are detachably connected, and there are various connecting pieces 22 that limit the rotation range of adjacent rod bodies 21. The connecting piece 22 realizes different rotation limit ranges through different sized limit slots 203. According to the scoliosis condition of the patient, the connecting piece 22 corresponding to the rotation limit range is selected.

[0049] In an optional embodiment of the present invention, the limit groove 203 limits the rotatable angle range of the first ball head rod 22 to 0° to 20°. By limiting the rotatable angle range to 0° to 20°, the degree of freedom of correction applied by the correction device to the spine can be accurately controlled, which helps to perform accurate correction according to the specific needs of the individual, optimize the correction effect and ensure that the correction effect is not too strong or too weak. Limiting the rotation angle range to between 0° and 20° effectively prevents overcorrection during spinal correction. Overcorrection may cause discomfort to the patient or further spinal problems, and the limitation of the limit groove 203 can ensure that the correction process is carried out within a safe and effective range. Accidental over-rotation can be reduced by a clear smaller rotation angle range, reducing the risk of injury to the spine during the correction process. Safe angle limitation can effectively prevent potential injuries caused by uncontrolled angles. Limiting the angle to between 0° and 20° can ensure that the correction device operates within a controllable and stable small range, which helps to maintain the stability and reliability of the correction effect.

[0050] like Figure 8As shown, in an optional embodiment of the present invention, the connecting member 22 includes a pin shaft seat 23 and a pin shaft 24, the pin shaft seat 23 is provided with a pin shaft 24 hole for installing the pin shaft 24, the pin shaft 24 is located at the pin shaft 24 hole, and a plurality of connecting members 22 are provided between the pedicle screws 1, and adjacent pin shafts 24 are perpendicular to each other. By providing the pin shaft 24 hole for installing the pin shaft 24 on the pin shaft seat 23, a tight fit between the pin shaft 24 and the pin shaft seat 23 can be ensured. The precise installation of the pin shaft 24 provides a stronger connection firmness and reduces the risk of unstable correction effect caused by loosening or falling off of the connection parts.

[0051] The arrangement of multiple connectors 22 and the arrangement of adjacent pins 24 perpendicular to each other allow the rod body 21 to move in two different directions, so that the flexible orthopedic rod 2 can adapt to spines with different curvatures, thereby improving the flexibility of the scoliosis correction device and allowing it to be adjusted in different correction schemes, so that the scoliosis correction device is suitable for various scoliosis conditions. The cooperation of the pin 24 and the pin seat 23 makes the assembly and disassembly process of the connector 22 easier. The installation and disassembly of the pin 24 is relatively simple, which reduces the complexity of the assembly process of the scoliosis correction device and improves the operating efficiency, and is particularly suitable for situations where the scoliosis correction device needs to be frequently adjusted or disassembled.

[0052] Since the connection method of the pin 24 and the pin seat 23 can reduce the need for complex connection parts, it helps to reduce manufacturing costs. At the same time, the standardized pin 24 and the pin seat 23 also help to improve production efficiency, thereby further reducing the cost of the device. The cooperation between the pin 24 and the pin seat 23 can disperse mechanical stress, reduce wear caused by long-term use or bearing a large load, improve the durability and service life of the device, and ensure that it can still maintain good performance during a long correction process.

[0053] like Figure 5 and Figure 8 As shown, in an optional embodiment of the present invention, the pedicle screw 1 includes a nail body 11, a nail seat 14 and a fastening stud 15. The nail body 11 is rotatably connected to the inner bottom end of the nail seat 14. The threaded section of the nail body 11 is located below the nail seat 14. Symmetrical through grooves are provided on both sides of the nail seat 14, and a threaded groove is provided on the inner side of the top of the nail seat 14. The fastening stud 15 is threadedly connected to the threaded groove, and the rod body 21 is clamped between the nail body 11 and the fastening stud 15.

[0054] The nail body 11 is connected to the inner bottom end of the nail seat 14 by rotation, ensuring the close combination between the nail body 11 and the nail seat 14, which can effectively improve the fixation stability of the nail body 11 and the spine, prevent loosening or displacement during use, and thus provide a more reliable correction effect. The threaded connection between the threaded groove on the inner side of the top of the nail seat 14 and the fastening stud 15 makes the installation process simpler and more efficient. The fastening degree of the fastening stud 15 is adjusted by thread to fix the rod body 21 clamped between the nail body 11 and the fastening stud 15, ensure the stability of the flexible orthopedic rod 2, and improve the convenience of fixing the rod body 21. The rod body 21 is clamped between the nail body 11 and the fastening stud 15, which can provide additional support and stability. Not only does it enhance the overall strength of the scoliosis correction device, but it also effectively distributes the correction force evenly to the spine, reduces local pressure, and improves comfort and effectiveness.

[0055] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution disclosed in the present invention can be achieved, and this document does not limit this.

[0056] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A scoliosis correction device, characterized in that: include: multiple pedicle screws; A flexible orthopedic rod, wherein a plurality of pedicle screws are used to fix the flexible orthopedic rod, wherein the flexible orthopedic rod comprises a rod body and a connector, wherein the plurality of rod bodies are movably connected end to end through the connector, and an angle formed by adjacent rod bodies ranges from 160° to 180°.

2. The scoliosis correction device according to claim 1, characterized in that: The connecting member comprises a hinge shell and a first ball head rod. Both ends of the hinge shell are provided with spherical through grooves or first spherical cavities matching the first ball head rod. The hinge shell is connected to the rod body through the first ball head rod.

3. The scoliosis correction device according to claim 2, characterized in that: The pedicle screw comprises a screw body and a screw cap, wherein the screw cap is arranged on the screw body, the screw cap is provided with a through hole matched with the size of the hinge housing, and the hinge housing is located at the through hole.

4. The scoliosis correction device according to claim 2, characterized in that: The pedicle screw includes a screw body, a screw cap and a second ball head rod. The hinge shell is also provided with a second spherical cavity. One end of the second ball head rod is provided with a ball head matching the second spherical cavity. The other end of the second ball head rod is arranged on the screw cap, and the screw cap is arranged on the screw body.

5. The scoliosis correction device according to claim 4, characterized in that: The first ball head rod and the nail body are perpendicular to each other.

6. The scoliosis correction device according to claim 1, characterized in that: The connecting member comprises a hinge shell and a first ball head rod, the hinge shell is provided with a first spherical cavity, the first ball head rod is adapted to the first spherical cavity, and the first ball head rod and the hinge shell are respectively arranged on two ends of the rod body.

7. The scoliosis correction device according to claim 6, characterized in that: The hinge housing is provided with a limiting groove, the limiting groove is communicated with the first spherical cavity, and the limiting groove is used to limit the rotation range of the first ball head rod.

8. The scoliosis correction device according to claim 7, characterized in that: The limiting groove limits the rotatable angle range of the first ball head rod to 0° to 20°.

9. The scoliosis correction device according to claim 1, characterized in that: The connecting member comprises a pin seat body and a pin, the pin seat body is provided with a pin hole for installing the pin, the pin is located at the pin hole, a plurality of the connecting members are arranged between the pedicle screws, and adjacent pins are perpendicular to each other.

10. The scoliosis correction device according to claim 1, characterized in that: The pedicle screw includes a screw body, a screw seat and a fastening stud. The screw body is rotatably connected to the inner bottom end of the screw seat. The threaded section of the screw body is located below the screw seat. Symmetrical through grooves are provided on both sides of the screw seat, and a threaded groove is provided on the inner side of the top of the screw seat. The fastening stud is threadedly connected to the threaded groove, and the rod body is clamped between the screw body and the fastening stud.

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