Plate-rod fixing system for cranial vertebra deformity surgery

Abstract

The invention provides a plate-rod assembly for cranial vertebra deformity surgery. The plate-rod assembly comprises a uniaxial vertebral arch tail-deviating screw, an outer locking tail cap, an orthopedic plate-rod, a long-tail occipital bone fixing plate and a reduction auxiliary device. A screw rod and a self-tapping screw tail which are integrally connected are adopted for the uniaxial vertebral arch tail-deviating screw, the orthopedic plate rod comprises a rod-shaped rod body and a plate-shaped plate end connected to one end of the rod body, and a connecting hole in the plate end of the orthopedic plate rod is connected to the screw rod of the uniaxial vertebral arch tail-deviating screw in a sleeved mode and locked through an outer locking tail cap. A rod body of the orthopedic plate rod is fixed on a wing plate of the long-tail occipital bone fixing plate; the orthopedic strength is enhanced, the fatigue of an internal fixture is reduced, and the long-term effective and stable orthopedic effect is ensured. Meanwhile, a reduction auxiliary device is adopted to calibrate and lock the single-axis vertebral arch tail deflection screw, accurate and convenient orthopedic operation is achieved, and the whole orthopedic process is safer and more effective.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a plate-rod fixation system for craniovertebral deformity surgery. Background Art

[0002] Craniovertebral deformity (cranio-cervical junction deformity) refers to the anatomical structure abnormality at the junction of the skull and the upper cervical vertebrae (atlantoaxial vertebrae) caused by genetic or environmental factors, mainly including basilar invagination, Chiari (herniation) malformation, atlantoaxial dislocation, etc. Clinically, such deformities are a common and serious disease in spinal surgery, and usually require surgical anatomical reduction and orthopedics to relieve symptoms and improve the patient's quality of life.

[0003] The surgery for cranio-cervical junction deformity is technically difficult and risky. The posterior approach atlanto-occipital internal fixation and reduction orthopedics is an important technique for surgical intervention of such diseases, which largely depends on stable, strong and anti-fatigue internal fixation and orthopedic devices. However, the existing orthopedic systems still have the following technical disadvantages in practical applications: 1. For the screw-rod system adopted in the prior art, please refer to a novel occipital fixation structure for posterior cervical spine with reduction function disclosed in CN114366263A. The outer end of the pedicle screw 4 in this comparative document is provided with a universal screw cap connected to the rod body of the occipital connecting rod 20, which results in a large shear force of the screw cap on the pedicle screw 4, and there are deficiencies such as insufficient orthopedic strength, large yield degree of orthopedic angle, high anti-shear force at the screw tail, poor anti-fatigue property, etc., so that it is difficult to achieve complete anatomical reduction, and problems such as screw breakage and loss of orthopedic effect in the long term, which are potential iatrogenic risk factors for the patient to require surgical revision again. 2. The existing technology has great difficulty and poor accuracy for this orthopedic surgery; it has high requirements for the operator.

[0004] In summary, in order to meet the characteristics of being convenient, safe, having orthopedic strength, anti-fatigue property and long-term stability, there is an urgent need to design a new orthopedic fixation system suitable for craniovertebral deformity surgery. Summary of the Invention

[0005] Therefore, the present invention provides a plate-rod fixation system for craniovertebral deformity surgery, which can improve the safety and convenience of the surgery, simplify the orthopedic process, enhance the orthopedic strength, reduce the fatigue of internal fixation, and ensure long-term effective and stable orthopedic effect.

[0006] To achieve the above object, the technical solution provided by the present invention is as follows:

[0007] A plate-rod fixation system for craniovertebral deformity surgery includes a uniaxial pedicle offset tail screw, an external locking tail cap, an orthopedic plate-rod, a long-tail occipital fixing plate and a reduction assisting device;

[0008] The long-tailed occipital fixing plate includes a middle plate and wing plates connected to both sides of the middle plate. The middle plate is provided with screw grooves for fixing the skull. There are two single-axis pedicle partial-tail screws, each including a nail rod integrally connected to a self-tapping nail tail, and the self-tapping nail tail is inclined to the nail rod. There are two orthopedic plate rods, each including a rod-shaped rod body and a plate-shaped plate end connected to one end of the rod body, and a connection hole is provided on the plate end.

[0009] The reduction assisting device includes a first adjusting unit, a second adjusting unit, a first screwdriver and a second screwdriver. The first adjusting unit and the second adjusting unit are telescopically arranged and are also swingably arranged relative to each other through a hinge shaft. Guide holes perpendicular to the hinge shaft are provided on both the first adjusting unit and the second adjusting unit. The first screwdriver and the second screwdriver are respectively inserted into the guide holes of the first adjusting unit and the second adjusting unit. By the telescoping and swinging of the first adjusting unit and the second adjusting unit, the distance and angle between the first screwdriver and the second screwdriver are adjusted, and the two single-axis pedicle partial-tail screws are respectively fixed to the craniovertebral by the first screwdriver and the second screwdriver. The connection holes at the plate ends of the two orthopedic plate rods are respectively sleeved on the nail rods of the two single-axis pedicle partial-tail screws and are locked by outer locking tail caps to form a downward pressing fulcrum, and the rod bodies of the two orthopedic plate rods are fixed on the two wing plates of the long-tailed occipital fixing plate.

[0010] Further, the outer locking tail cap is also locked to the nail rod of the single-axis pedicle partial-tail screw by the first screwdriver or the second screwdriver.

[0011] Further, by pressing down the first screwdriver and the second screwdriver, the deformed part is reduced, and at the same time, the rod body of the orthopedic plate rod is fixed on the wing plate of the long-tailed occipital fixing plate to achieve orthosis.

[0012] Further, operating handles are also connected to the upper ends of the first screwdriver and the second screwdriver.

[0013] Further, the self-tapping nail tail of the single-axis pedicle partial-tail screw forms an external hexagonal nut at the end connected to the nail rod. The first screwdriver and the second screwdriver are external hexagonal socket screwdrivers. The outer locking tail cap is a hexagonal tail cap.

[0014] Further, two outer locking tail caps are fitted on the nail rod of each single-axis pedicle partial-tail screw. The two outer locking tail caps lock the plate end of the orthopedic plate rod on the single-axis pedicle partial-tail screw.

[0015] Further, plate rod fixing parts are provided on both wing plates of the long-tailed occipital fixing plate, and the rod bodies of the orthopedic plate rods are fixed on the plate rod fixing parts of the wing plates.

[0016] Further, mounting slots are formed in the wing plate. The plate rod fixing part includes a mounting base and two spaced and oppositely arranged connecting wall plates connected to the mounting base. The mounting base is assembled in the mounting slots and can be adjusted in position within the mounting slots. The rod body of the orthopedic plate rod passes through between the two connecting wall plates. Internal threads are formed on the inner walls of the two connecting wall plates, and the rod body of the orthopedic plate rod is fixedly pressed by screwing fastening screws into the interiors of the two connecting wall plates.

[0017] Further, a sleeve hole is provided at the end of the first adjusting unit. The second adjusting unit is movably sleeved in the sleeve hole of the first adjusting unit, thereby realizing the telescopic arrangement of the first adjusting unit and the second adjusting unit; a tightening bolt is further provided on the first adjusting unit, and the second adjusting unit is tightened or loosened by screwing the tightening bolt in or out.

[0018] Further, the first adjusting unit includes a first connecting rod and a first handle. A sleeve hole is formed at the first end of the first connecting rod. The first handle is connected to the second end of the first connecting rod. The second adjusting unit includes a second connecting rod, a third connecting rod and a second handle. The third connecting rod is hinged to the first end of the second connecting rod through a hinge shaft. The third connecting rod is movably sleeved in the sleeve hole of the first connecting rod. The second handle is connected to the second end of the second connecting rod. The guiding holes are respectively formed on the first connecting rod and the second connecting rod.

[0019] Further, the inclination angle between the nail rod of the uniaxial pedicle offset tail screw and the self-tapping nail tail is 20°.

[0020] Through the technical solution provided by the present invention, the following beneficial effects are achieved:

[0021] 1. The uniaxial pedicle offset tail screw adopts an integrally connected nail rod and self-tapping nail tail. The orthopedic plate rod includes a rod-shaped rod body and a plate-shaped plate end connected to one end of the rod body. The connecting hole of the plate end of the orthopedic plate rod is sleeved on the nail rod of the uniaxial pedicle offset tail screw and locked by an external locking tail cap. The rod body of the orthopedic plate rod is fixed on the wing plate of the long tail occipital bone fixing plate; the structure of the orthopedic plate rod not only ensures the firmness and stability of the nail-plate connection (i.e., the connection with the uniaxial pedicle offset tail screw and the connection with the long tail occipital bone fixing plate), but also retains the flexibility of orthopedic angle adjustment. It avoids problems such as insufficient orthopedic force, large yield of orthopedic angle, high anti-shearing force of the nail tail, and poor anti-fatigue performance caused by using a universal nail cap to fix the rod body of the orthopedic plate rod in the prior art; enhances the orthopedic force, reduces the fatigue of internal fixation objects (referring to the self-tapping nail tail of the uniaxial pedicle offset tail screw), and ensures long-term effective and stable orthopedic effects.

[0022] 2. Surgical assistance is provided using a reset assist device. The telescoping and folding of the first adjustment unit and the second adjustment unit can adjust the distance and angle between the first screwdriver and the second screwdriver, and the uniaxial pedicle offset tail screw is fixed by the screwdriver, achieving precise and convenient orthopedic correction. The entire orthopedic process is safer and more effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure shows a schematic connection structure of a plate-rod fixation system for craniovertebral deformity surgery in an embodiment;

[0024] Figure 2 As shown is Figure 1 a partial exploded view of the structure shown;

[0025] Figure 3 The figure shows an exploded view of the structure of the reset assist device in an embodiment;

[0026] Figure 4 The figure shows a partial exploded view of the structure of a plate-rod fixation system for craniovertebral deformity surgery in an embodiment;

[0027] Figure 5 The figure shows a schematic structure of a long-tailed occipital bone fixing plate in an embodiment Figure 1 ;

[0028] Figure 6 The figure shows a schematic structure of a long-tailed occipital bone fixing plate in an embodiment Figure 2 ;

[0029] Figure 7 The figure shows a schematic structure of an orthopedic plate-rod in an embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To further illustrate the embodiments, the present invention provides drawings. These drawings are a part of the disclosure of the present invention, mainly used to illustrate the embodiments, and can be combined with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0031] In the description of the present invention, the orientation or positional relationship terms such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the orientation or positional relationship shown in the drawings, only for the convenience of description and simplifying the operation, 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.

[0032] The present invention will now be further described in conjunction with the drawings and specific embodiments.

[0033] Referring to Figures 1 to 7 as shown, a plate-rod fixation system for craniovertebral deformity surgery provided in this embodiment includes a uniaxial pedicle offset screw 30, an external locking tail cap 40, an orthopedic plate-rod 20, a long-tail occipital bone fixing plate 10, and a reduction assist device 50; wherein, the long-tail occipital bone fixing plate 10 includes a middle plate 11 and wing plates 12 connected to both sides of the middle plate 11, and screw grooves 111 for fixing the skull are formed in the middle plate 11; specifically, the number of screw grooves 111 is three and they are arranged at intervals along the length direction of the middle plate 11. During the operation, the occipital screws are fixed to the skull through the screw grooves 111 to achieve the fixation of the long-tail occipital bone fixing plate 10. By providing the screw grooves 111 in the middle plate 11, the occipital screws can be fixed in the thicker area of the skull, ensuring the firmness and safety of the connection. Specifically, the long-tail occipital bone fixing plate 10 can be pre-bent according to the shape of the patient's skull to better fit it.

[0034] There are two uniaxial pedicle offset screws 30, both of which include a nail rod 31 integrally connected and a self-tapping nail tail 32, and the self-tapping nail tail 32 is inclined to the nail rod 31.

[0035] There are also two orthopedic plate-rods 20, both of which include a rod-shaped rod body 21 and a plate-shaped plate end 22 connected to one end of the rod body 21, and connection holes 23 are formed in the plate end 22.

[0036] The reset assist device 50 includes a first adjustment unit 51, a second adjustment unit 52, a first screwdriver 53, and a second screwdriver 54. The first adjustment unit 51 and the second adjustment unit 52 are telescopically arranged and are also relatively swingably arranged through a hinge shaft 56. Guide holes (591, 592) perpendicular to the hinge shaft 56 are formed in both the first adjustment unit 51 and the second adjustment unit 52. The first screwdriver 53 and the second screwdriver 54 are respectively inserted into the guide hole 591 of the first adjustment unit 51 and the guide hole 592 of the second adjustment unit 52. During operation, two uniaxial pedicle offset tail screws 30 are respectively mounted on the first screwdriver 53 and the second screwdriver 54. By telescoping the first adjustment unit 51 and the second adjustment unit 52, the distance between the first screwdriver 53 and the second screwdriver 54 can be adjusted. At the same time, by swinging the first adjustment unit 51 and the second adjustment unit 52 to adjust the angles of the first screwdriver 53 and the second screwdriver 54, so that the self-tapping screw tails 32 of the two uniaxial pedicle offset tail screws 30 are aligned with the fixation positions of the cranial vertebrae. Then, the two uniaxial pedicle offset tail screws 30 are locked at the predetermined positions through the first screwdriver 53 and the second screwdriver 54 respectively. The self-tapping screw tail 32 is inclined with respect to the screw rod 31, so that after the self-tapping screw tail 32 is fixed, the screw rod 31 can be substantially perpendicular to the surface of the fixation position, which is beneficial to subsequent operations. Specifically, the angle at which the self-tapping screw tail 32 is inclined with respect to the screw rod 31 can be selected according to the actual operation conditions of the patient, such as selecting the uniaxial pedicle offset tail screw 30 with an inclination of 20°.

[0037] The connection holes 23 at the plate ends 22 of the two orthopedic plate rods 20 are respectively sleeved on the screw rods 31 of the two uniaxial pedicle offset tail screws 30 and are locked through the outer locking end caps 40, realizing a stable and reliable connection between the orthopedic plate rods 20 and the uniaxial pedicle offset tail screws 31; and a pressing fulcrum (i.e., the locking position of the uniaxial pedicle offset tail screw 30) is formed, and the deformed part of the patient is reset and corrected by pressing through this pressing fulcrum; after the correction is completed, the rod bodies 21 of the two orthopedic plate rods 20 are fixed on the two wing plates 12 of the long-tailed occipital bone fixing plate 10; thus, the operation of the orthopedic surgery is realized.

[0038] The plate-rod fixation system for cranial vertebra deformity surgery provided by the present application can improve the safety and convenience of the surgery, simplify the orthopedic process, enhance the orthopedic strength, reduce the fatigue of the internal fixation, and ensure long-term effective and stable orthopedic effects.

[0039] Further preferably, in this embodiment, the outer locking tail cap 40 is also locked to the nail rod 31 of the uniaxial pedicle offset tail screw 30 by the first screwdriver 53 or the second screwdriver 54. As in this embodiment, the self-tapping nail tail 32 of the uniaxial pedicle offset tail screw 30 forms an external hexagonal nut 33 at the end connecting the nail rod 31. The first screwdriver 53 and the second screwdriver 54 are external hexagonal socket screwdrivers, and the outer locking tail cap 40 is a hexagonal tail cap; the external hexagonal socket screwdriver cooperates with the external hexagonal nut 33 of the uniaxial pedicle offset tail screw 30 to perform the locking operation on the uniaxial pedicle offset tail screw 30. After completing the locking of the uniaxial pedicle offset tail screw 30, the reset assist device 50 is removed. Then, the connection hole 23 at the plate end 22 of the orthopedic plate rod 20 is sleeved on the corresponding nail rod 31 of the uniaxial pedicle offset tail screw 30. Then, the outer locking tail cap 40 is respectively placed in the external hexagonal sockets of the first screwdriver 53 and the second screwdriver 54, and the outer locking tail cap 40 is locked to the nail rod 31 of the uniaxial pedicle offset tail screw 30 by the screwdriver until the plate end 22 of the orthopedic plate rod 20 is tightened.

[0040] Since the reset assist device 50 is still in the working position at this time, preferably, the deformed part is reset by pressing down the first screwdriver 53 and the second screwdriver 54, and at the same time, the rod body 21 of the orthopedic plate rod 20 is fixed on the wing plate 12 of the long tail occipital fixing plate 10 to achieve orthosis. The orthopedic operation is more rapid, safe and effective, greatly saving the operation time and improving the accuracy of reset.

[0041] The ends of the first screwdriver 53 and the second screwdriver 54 (the ends away from the external hexagonal sockets) are also connected with operating handles 55, which are convenient for hand-held rotation operation and pressing operation.

[0042] Specifically, in this embodiment, two outer locking tail caps 40 are fitted on the nail rod 31 of each uniaxial pedicle offset tail screw 30; the two outer locking tail caps 40 lock the plate end 22 of the orthopedic plate rod 20 to the uniaxial pedicle offset tail screw 30 to achieve a more reliable locking.

[0043] Two plate-rod fixing parts 13 are arranged on the two wing plates 12 of the long-tail occipital bone fixing plate 10, and the rod body 21 of the orthopedic plate rod 20 is fixed on the plate-rod fixing part 13 of the wing plate 12. Specifically, in this embodiment, an installation slot hole 121 is formed on the wing plate 12. The plate-rod fixing part 13 includes an installation base and two spaced and oppositely arranged connecting wall plates connected to the installation base. The installation base is assembled in the installation slot hole 121 and can adjust its position in the installation slot hole 121 to adapt to the connection of the orthopedic plate rod 20. The rod body 21 of the orthopedic plate rod 20 penetrates between the two connecting wall plates. Internal threads are formed on the inner walls of the two connecting wall plates, and the rod body 21 of the orthopedic plate rod 20 is fixed and pressed by screwing a fastening screw into the interiors of the two connecting wall plates; thus, the fixed connection between the orthopedic plate rod 20 and the long-tail occipital bone fixing plate 10 is realized; and the connection is reliable. The plate-rod fixing part 13 can be adjusted according to the actual position and angle of the orthopedic plate rod 20, and has good adaptability. Of course, in other embodiments, the fixed connection manner between the orthopedic plate rod 20 and the long-tail occipital bone fixing plate 10 is not limited to this.

[0044] In this specific embodiment, a relatively preferred structure of the reset assisting device 50 is as follows: a sleeve hole is arranged at the end of the first adjusting unit 51, and the second adjusting unit 52 is movably sleeved in the sleeve hole of the first adjusting unit 51, thereby realizing the telescopic setting of the first adjusting unit 51 and the second adjusting unit 52; a tightening bolt (defined as the first tightening bolt 57) is further arranged on the first adjusting unit 51, and the second adjusting unit 52 is tightened or loosened by screwing the first tightening bolt 57 in or out. Further refined, the first adjusting unit 51 includes a first connecting rod 511 and a first handle 512. A sleeve hole is formed at the first end of the first connecting rod 511, and the first handle 512 is connected to the second end of the first connecting rod 511. The second adjusting unit 52 includes a second connecting rod 521, a third connecting rod 522 and a second handle 523. The third connecting rod 522 is hinged to the first end of the second connecting rod 521 through a hinge shaft 56, and the third connecting rod 522 is movably sleeved in the sleeve hole of the first connecting rod 511. In this way, the telescopic setting of the first adjusting unit 51 and the second adjusting unit 52 as described above is realized, and relative swinging setting can also be realized through a hinge shaft 56. The second handle 523 is connected to the second end of the second connecting rod 521, and the guiding holes (591, 592) are respectively formed on the first connecting rod 511 and the second connecting rod 521. During operation, the first handle 512 and the second handle 523 are respectively held to adjust the telescopic and swinging of the first adjusting unit 51 and the second adjusting unit 52.

[0045] More specifically, tightening bolts (defined as the second tightening bolts 58) corresponding to the guiding holes (591, 592) thereon are further provided on the first connecting rod 511 and the second connecting rod 521 to perform tightening or loosening operations on the screwdriver.

[0046] Of course, in other embodiments, the structure of the reset assisting device 50 is not limited thereto. For example, a sleeve is provided on the third connecting rod 522, and the first connecting rod 511 is movably sleeved in the sleeve hole of the third connecting rod 522, etc.

[0047] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them fall within the protection scope of the present invention.

Claims

1. A plate-rod fixation system for cranio-vertebral deformity surgery, characterized in that: It includes a uniaxial pedicled caudal screw, an external locking caudal cap, a correction plate rod, a long caudal occipital fixation plate and a reduction assist device; The long-tail occipital fixation plate comprises an intermediate plate and wing plates connecting the two sides of the intermediate plate, wherein the intermediate plate is provided with a screw slot for fixing the skull; two uniaxial vertebral arch offset tail screws are provided, each comprising an integrally connected screw rod and a self-tapping screw tail, wherein the self-tapping screw tail is inclined to the screw rod; two orthopedic plate rods are provided, each comprising a rod-shaped rod body and a plate-shaped plate end connected to one end of the rod body, wherein a connecting hole is provided on the plate end; The resetting auxiliary device includes a first adjusting unit, a second adjusting unit, a first screwdriver and a second screwdriver. The first adjusting unit and the second adjusting unit are retractable and can also be relatively swung through a hinge axis. The first adjusting unit and the second adjusting unit are both provided with guide holes perpendicular to the hinge axis. The first screwdriver and the second screwdriver are respectively inserted into the guide holes of the first adjusting unit and the second adjusting unit. The spacing and angle of the first screwdriver and the second screwdriver are adjusted by retracting and swinging the first adjusting unit and the second adjusting unit, and two uniaxial vertebral arch deviation tail screws are respectively fixed to the cranial vertebrae through the first screwdriver and the second screwdriver, the connecting holes at the plate ends of the two orthopedic plate rods are respectively sleeved on the screw rods of the two uniaxial vertebral arch deviation tail screws and locked through external locking tail caps to form a downward pressure fulcrum, and the rod bodies of the two orthopedic plate rods are fixed on the two wing plates of the long tail occipital fixation plate.

2. The plate-rod fixation system for cranio-vertebral deformity surgery according to claim 1, characterized in that: The outer locking tail cap is also locked on the screw rod of the uniaxial vertebral arch offset tail screw by the first screwdriver or the second screwdriver.

3. The plate-rod fixation system for cranio-vertebral deformity surgery according to claim 2, characterized in that: The deformed part is reset by pressing down the first screwdriver and the second screwdriver, and the rod body of the correction plate rod is fixed on the wing plate of the long tail occipital bone fixing plate to realize correction.

4. The plate-rod fixation system for cranio-vertebral deformity surgery according to claim 3, characterized in that: The ends of the first screwdriver and the second screwdriver are also connected with operating handles.

5. The plate-rod fixation system for cranio-vertebral deformity surgery according to claim 2, characterized in that: The self-tapping screw tail of the uniaxial pedicle tail screw is formed with an external hexagonal nut at the end connected to the screw rod, the first screwdriver and the second screwdriver are external hexagonal sleeve screwdrivers; and the external locking tail cap is a hexagonal tail cap.

6. The plate-rod fixation system for cranio-vertebral deformity surgery according to any one of claims 1 to 5, characterized in that: The screw rod of each uniaxial vertebral arch offset tail screw is matched with two external locking tail caps; the two external locking tail caps lock the plate ends of the correction plate rods on the uniaxial vertebral arch offset tail screws.

7. The plate-rod fixation system for cranio-vertebral deformity surgery according to claim 1, characterized in that: The two wing plates of the long tail occipital bone fixing plate are both provided with plate-rod fixing parts, and the rod body of the orthopedic plate-rod is fixed on the plate-rod fixing parts of the wing plates.

8. The plate-rod fixation system for cranio-vertebral deformity surgery according to claim 7, characterized in that: The wing plate is provided with a mounting slot, and the plate rod fixing part includes a mounting base and two spaced and oppositely arranged connecting wall plates connected to the mounting base. The mounting base is assembled in the mounting slot and can adjust its position in the mounting slot. The rod body of the orthopedic plate rod is passed through the two connecting wall plates. The inner walls of the two connecting wall plates are provided with internal threads, and are screwed to the inside of the two connecting wall plates by fastening screws to fix and press the rod body of the orthopedic plate rod.

9. The plate-rod fixation system for cranio-vertebral deformity surgery according to claim 1, characterized in that: A sleeve hole is provided at the end of the first adjusting unit, and the second adjusting unit can be movably sleeved in the sleeve hole of the first adjusting unit, thereby realizing the telescopic setting of the first adjusting unit and the second adjusting unit; a tightening bolt is also provided on the first adjusting unit, and the tightening or loosening of the second adjusting unit is realized by screwing the tightening bolt in or out.

10. The plate-rod fixation system for cranio-vertebral deformity surgery according to claim 8, characterized in that: The first adjusting unit includes a first connecting rod and a first handle, the first end of the first connecting rod forms a sleeve hole, the first handle is connected to the second end of the first connecting rod, the second adjusting unit includes a second connecting rod, a third connecting rod and a second handle, the third connecting rod is hinged to the first end of the second connecting rod through a hinge shaft, the third connecting rod can be movably sleeved in the sleeve hole of the first connecting rod, the second handle is connected to the second end of the second connecting rod, and the guide holes are respectively formed on the first connecting rod and the second connecting rod.

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