Immediate fixation fusion device and rod and pin fixation system

Abstract

The present application relates to a kind of instant fixation fusion device and nail rod fixation system, the instant fixation fusion device includes fusion plate and side block screw, the fusion plate includes sequentially connected upper fixed plate, connecting plate and lower fixed plate, a first hole is equipped on the lower fixed plate, the side block screw is arranged in the first hole, and it is used to be connected with the side block of vertebral body, in the direction of the end cap of the side block screw to the tip of the side block screw, the side block screw is inclined to extend towards the front side of the fusion plate and the outside of the fusion plate, and the side block screw can be closely and compacted the lower fixed plate.The instant fixation fusion device of the present application can be stably installed on patient during operation, speed up the operation process, reduce the damage to vertebral body and surrounding soft tissue, and is beneficial to the recovery of patient after operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to an immediate fixation and fusion device and a pin-rod fixation system. Background Technology

[0002] In clinical practice, the most common surgical procedure for cervical spinal stenosis is posterior cervical laminectomy with single-door laminectomy to expand and decompress the spinal canal. In most cervical laminectomies, a fusion plate is implanted to expand and shape the spinal canal, thus achieving a decompression effect. However, in some techniques, the structural design of the fusion plate is flawed, resulting in poor effectiveness when using only ordinary screws; while using it directly in conjunction with lateral mass screws can cause significant damage to the vertebral body and surrounding soft tissues during fusion plate implantation, hindering postoperative recovery. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention propose an immediate fixation fusion device that can be immediately and securely installed on the patient during surgery, thereby accelerating the surgical process, reducing damage to the vertebral body and surrounding soft tissues, and facilitating postoperative recovery.

[0005] Embodiments of the present invention also propose a nail-bar fixing system.

[0006] The immediate fixation and fusion device according to an embodiment of the present invention includes: a fusion plate, the fusion plate including an upper fixation plate, a connecting plate and a lower fixation plate connected in sequence, the lower fixation plate having a first hole; and a side block screw, the side block screw passing through the first hole and used for connection with the side block of the vertebral body. In the direction from the end cap of the side block screw to the tip of the side block screw, the side block screw extends obliquely toward the front side and the outer side of the fusion plate, and the side block screw can tightly adhere to and press against the lower fixation plate.

[0007] According to an embodiment of the present invention, the immediate fixation and fusion device has a first hole on the lower fixation plate, meaning that only one lateral block screw is needed for fixation. This is controlled by the screw's insertion angle and direction. This not only reduces damage to the vertebral body and surrounding soft tissues from multiple screws, but also further reduces damage caused by the insertion angle because the lateral block screw extends obliquely towards the anterior and lateral sides of the fusion plate. This also allows for a better insertion angle for the lateral block screw, improving the stability of the connection between the screw and the lateral block, and reducing the risk of nerve root injury during screw insertion. Furthermore, the lateral block screw provides additional contact surface by closely adhering to and pressing against the lower fixation plate, improving the stability of the connection between the lower fixation plate and the lateral block screw. Effective fixation of the fusion plate can be achieved after only the lateral block screw is installed. Therefore, the immediate fixation and fusion device of this invention can be immediately and securely installed on the patient, accelerating the surgical process, reducing damage to the vertebral body and surrounding soft tissues, promoting postoperative recovery, and achieving good implantation results.

[0008] In some embodiments, the deflection angle of the side block screw toward the front side of the fusion plate is β, and the deflection angle of the side block screw toward the outer side of the fusion plate is γ, wherein 20°≤β≤30° and 10°≤γ≤20°.

[0009] In some embodiments, the first hole is a strip hole that extends obliquely toward the front side of the fusion plate and the outer side of the fusion plate; and / or, the first hole gradually narrows from top to bottom, and the angle between the inner wall surface of the first hole and the axis of the first hole is θ, where 0 < θ ≤ 10°.

[0010] In some embodiments, the lower fixing plate is provided with a ball socket, and the side block screw includes a first screw and an end cap. The first screw has a ball head, and the end cap has a U-shaped groove. Part of the ball head fits into the U-shaped groove, and another part of the ball head presses against at least one of the ball socket and the upper surface of the lower fixing plate.

[0011] In some embodiments, the lower fixing plate has a plurality of sharp teeth on the side adjacent to the side block, the plurality of sharp teeth being arranged circumferentially around the first hole; and / or, the lower fixing plate has a first arcuate surface facing the side block, the first arcuate surface protruding in a direction away from the side block; and / or, the side of the lower fixing plate facing the side block has an anti-slip coating; and / or, the thickness of the lower fixing plate is greater than the thickness of either the upper fixing plate or the connecting plate.

[0012] In some embodiments, the fusion plate further includes a first support foot, which is disposed at the connection position between the connecting plate and the lower fixing plate. The first support foot extends toward the side block, and the angle between the extension direction of the first support foot and the lower fixing plate is α, wherein 90°≤α≤120°.

[0013] In some embodiments, the connecting plate includes a first arc-shaped plate and a second arc-shaped plate, the upper fixing plate, the first arc-shaped plate, the second arc-shaped plate and the lower fixing plate are connected in sequence, the included angle between the first arc-shaped plate and the second arc-shaped plate is an obtuse angle, and both the first arc-shaped plate and the second arc-shaped plate protrude in a direction away from the side block.

[0014] In some embodiments, the fusion plate further includes a second support foot, which is disposed at the connection position of the first arc-shaped plate and the second arc-shaped plate. The second support foot extends in a direction away from the lower fixed plate, and the upper fixed plate, the first arc-shaped plate and the second support foot form a clamping cavity.

[0015] In some embodiments, the upper fixing plate has a second hole extending through its thickness direction, there are two second holes, and they are spaced apart along the width direction of the upper fixing plate, and a second screw is inserted into each of the two second holes; and / or, the upper fixing plate has a second arcuate surface facing the vertebral body, and the second arcuate surface protrudes in a direction away from the vertebral lamina.

[0016] Another embodiment of the nail-rod fixation system of the present invention includes a plurality of immediate fixation and fusion devices, wherein the immediate fixation and fusion devices are any one of the immediate fixation and fusion devices in the embodiments of the present invention, and the plurality of immediate fixation and fusion devices are arranged one-to-one on the plurality of vertebral bodies; and a connecting rod, wherein the connecting rod is connected to the plurality of lateral block screws.

[0017] According to an embodiment of the present invention, the rod-and-screw fixation system, because the lower fixation plate has a first hole, requires only one lateral block screw for fixation. This is controlled by the screw insertion angle and direction, which not only reduces damage to the vertebral body and surrounding soft tissues from multiple screws, but also further reduces damage caused by the insertion angle because the lateral block screw extends obliquely towards the anterior side and lateral side of the fusion plate. This also allows for a better insertion angle for the lateral block screw, improving the stability of the connection between the lateral block screw and the lateral block, and reducing the risk of nerve root injury during lateral block screw insertion. Furthermore, because the lateral block screw can closely adhere to and press against the lower fixation plate, it provides additional contact surface, improving the stability of the connection between the lower fixation plate and the lateral block screw and the lateral block. Effective fixation of the fusion plate can be achieved after only installing the lateral block screw. Therefore, the rod-and-screw fixation system of the present invention can be immediately and securely installed on the patient, accelerating the surgical process, reducing damage to the vertebral body and surrounding soft tissues, promoting postoperative recovery, and achieving good implantation results. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the instantaneous fixation and fusion device according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram from another perspective of the instantaneous fixation fusion device according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of another perspective of the instantaneous fixed fusion device according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the fusion plate of the instant fixation fusion device according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the fusion plate of the instantaneous fixing fusion device according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the fusion plate of the instantaneous fixed fusion device according to an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram from another perspective of the fusion plate of the instantaneous fixing fusion device according to an embodiment of the present invention.

[0025] Figure 8 This is a cross-sectional view of the upper fixing plate of the fusion plate of the instantaneous fixing fusion device according to an embodiment of the present invention.

[0026] Figure 9 This is a cross-sectional view of the fusion plate of the instantaneous fixing fusion device according to an embodiment of the present invention.

[0027] Figure 10This is a schematic diagram of the fusion plate of an instant fixation fusion device according to another embodiment of the present invention.

[0028] Figure 11 This is a cross-sectional view of the fusion plate of the instantaneous fixing fusion device according to another embodiment of the present invention.

[0029] Figure 12 This is a cross-sectional view of an instant fixation and fusion device according to another embodiment of the present invention.

[0030] Figure 13 This is a schematic diagram of the installation of the instant fixation and fusion device and the vertebral body according to an embodiment of the present invention.

[0031] Figure label:

[0032] 1. Fusion plate; 11. Upper fixing plate; 111. Second arc-shaped surface; 112. Second hole; 12. Connecting plate; 121. First arc-shaped plate; 122. Second arc-shaped plate; 13. Lower fixing plate; 131. First hole; 132. Pointed tooth; 133. First arc-shaped surface; 134. Ball socket; 14. First support leg; 15. Second support leg; 16. Clamping cavity;

[0033] 2. Side block screw; 21. U-shaped groove; 22. First screw; 221. Ball head; 23. End cap;

[0034] 3. The second screw;

[0035] 4. Screw plug;

[0036] 5. Vertebral body; 51. Vertebral laminae; 52. Lateral mass. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] The following is a reference appendix. Figures 1 to 13 The present invention describes an instant fixation fusion device and a nail rod fixation system according to embodiments of the present invention.

[0039] like Figures 1 to 4 As shown, the instant fixation fusion device of this invention includes a fusion plate 1 and a side block screw 2. The fusion plate 1 includes an upper fixation plate 11, a connecting plate 12 and a lower fixation plate 13 connected in sequence. The lower fixation plate 13 is provided with a first hole 131. The side block screw 2 passes through the first hole 131 and is used to connect with the side block 52 of the vertebral body 5. In the direction from the end cap of the side block screw 2 to the tip of the side block screw 2, the side block screw 2 extends obliquely toward the front side of the fusion plate 1 and the outer side of the fusion plate 1, and the side block screw 2 can tightly adhere to and press against the lower fixation plate 13.

[0040] It should be noted that the front-to-back direction of fusion plate 1 (e.g., Figure 2 The X direction (as shown in the image) is consistent with the width direction of fusion plate 1, and the front side of fusion plate 1 is one side along its width direction. The inward and outward directions of fusion plate 1 (e.g., ...) Figure 3 The Z-direction of the fusion plate 1 is aligned with the length direction of the fusion plate 1. The side of the fusion plate 1 with the upper fixing plate 11 is the inner side of the fusion plate 1, and the side of the fusion plate 1 with the lower fixing plate 13 is the outer side of the fusion plate 1. The vertical direction of the fusion plate 1 is... Figure 2 in the Y direction.

[0041] When implanting the fusion plate 1, the doctor can fix the raised lamina 51 with the upper fixation plate 11 and fix it with the ipsilateral lateral mass 52 with the lower fixation plate 13 to form a stable bridging structure.

[0042] According to an embodiment of the present invention, the immediate fixation and fusion device has a first hole 131 on the lower fixation plate 13, meaning that the lower fixation plate 13 only needs one lateral block screw 2 for fixation. This can be controlled by the insertion angle and direction of the screw. This not only reduces the damage to the vertebral body 5 and surrounding soft tissue caused by multiple screws, but also further reduces the damage caused by the insertion angle because the lateral block screw 2 extends obliquely towards the front side and the outer side of the fusion plate 1. This also allows for a better implantation angle of the lateral block screw 2, which is beneficial to improving the firmness of the connection between the lateral block screw 2 and the lateral block 52, and reduces the risk of nerve root damage during the implantation of the lateral block screw 2.

[0043] In addition, since the side block screw 2 can fit tightly against and press against the lower fixing plate 13, it provides an additional contact surface, which can improve the stability of the connection between the lower fixing plate 13 and the side block screw 2 and the side block 52. Effective fixation of the fusion plate 1 can be achieved by only installing the side block screw 2.

[0044] Therefore, the immediate fixation and fusion device of the present invention can be immediately and securely installed on the patient, speeding up the surgical process, reducing damage to the vertebral body 5 and surrounding soft tissues, which is beneficial to the patient's postoperative recovery and has a good implantation effect.

[0045] On the other hand, patients who have received the immediate fixation and fusion device according to the embodiments of the present invention can start functional exercises earlier, prevent neck muscle atrophy and tissue adhesion, effectively maintain the normal physiological lordosis of the cervical spine, improve cervical spine mobility, and reduce discomfort caused by wearing a neck brace for a long time.

[0046] It is understood that the immediate fixation and fusion device of the present invention, compared with the solution of "setting multiple first holes 131 on the upper fixation plate 11", does not increase the damage to the lateral mass 52, and has lower requirements for the placement of the lower fixation plate 13, which is beneficial to shorten the surgeon's operation time. The immediate fixation and fusion device of the present invention can fix the fusion plate 1 and the lateral mass 52 with a single lateral mass screw 2, with good fixation effect, which can effectively prevent the problem of reduced opening or closing angle of the vertebral laminae 51 after surgery.

[0047] It should be noted that the instant fixation and fusion device of the present invention only limits the insertion direction and arrangement position of the side block screw 2, and does not specifically limit the type and structure of the side block screw 2.

[0048] In other words, the side block screw 2 can be a screw connected to the nail rod fixation system, or it can be a screw not connected to the nail rod fixation system; that is, the side block screw 2 can be a common medical fastening screw.

[0049] In one example, the end of the side block screw 2 of the instant fixation fusion device of the present invention can be used to fix the connecting rod. Since the side block screw 2 can be close to and press against the lower fixation plate 13 and also has the function of fixing the connecting rod, the present invention can reduce the number of screws used and does not increase the area of ​​the lower fixation plate 13 compared with the solution of "the lower fixation plate 13 of the fusion plate 1 is simultaneously arranged with side block 52 fixing screws and rod fixing screws", thereby reducing the surgical wound area and benefiting the patient's postoperative recovery.

[0050] Optionally, such as Figure 2 As shown, the deflection angle of the side block screw 2 toward the front side of the fusion plate 1 is β, and the deflection angle of the side block screw 2 toward the outside of the fusion plate 1 is γ, where 20°≤β≤30° and 10°≤γ≤20°.

[0051] For example, β can be 20°, 25°, or 30°. γ can be 10°, 15°, or 20°.

[0052] The inventors of this application discovered through experimental research that when the lateral block screw 2 is inserted in the above manner, the problem of damage to surrounding nerves or blood vessels during the implantation of the lateral block screw 2 can be further reduced, and the fixation strength can be increased, thereby reducing the risk of loosening of the lateral block screw 2.

[0053] For example, the side block screw 2 is connected to the side block 52 using a double cortical fixation method, which makes the side block screw 2 more secure after implantation.

[0054] Optionally, such as Figure 5As shown, the first hole 131 is a strip-shaped hole that extends obliquely towards the front and outer side of the fusion plate 1. This provides greater room for movement and a larger swing angle for the first screw, making the installation and positioning of the fusion plate 1 more flexible and meeting the needs of most patients. This improves the flexibility of the fusion device and broadens its application range.

[0055] Optionally, such as Figure 9 As shown, the first hole 131 gradually narrows from top to bottom. The angle between the inner wall surface of the first hole 131 and the axis of the first hole 131 is θ, where 0 < θ ≤ 10°. For example, θ can be 1°, 5°, or 10°. It can be understood that the first hole 131 has a trumpet-shaped opening structure. This structure can control the minimum deflection angle of the side block screw 2 and the insertion angle of the side block screw 2, thereby improving the implantation effect of the side block screw 2.

[0056] Optionally, such as Figures 1 to 3 As shown, the lower fixing plate 13 is provided with a ball socket 134, and the side block screw 2 includes a first screw 22 and an end cap 23. The first screw 22 has a ball head 221, and the end cap 23 has a U-shaped groove. Part of the ball head 221 fits in the U-shaped groove 21, and the other part of the ball head 221 presses against the ball socket 134 and one of the upper surfaces of the lower fixing plate 13.

[0057] Understandably, the ball head 221 can rotate omnidirectionally relative to the U-shaped groove 21 to adjust the insertion angle of the side block screw 2. The U-shaped groove 21 is used to fix the connecting rod. Since part of the ball head 221 fits inside the U-shaped groove 21, and the other part of the ball head 221 is close to and presses against the lower fixing plate 13, the pressing force between the ball head 221 and the lower fixing plate 13 can limit the movement of the lower fixing plate 13 relative to the side block 52, thereby improving the stability of the fusion plate 1 after implantation.

[0058] For example, such as Figure 4 As shown, the ball socket 134 is connected to the first hole 131, that is, the ball socket 134 is located on the outer edge of the first hole 131.

[0059] For example, such as Figures 10 to 12 As shown, the ball socket 134 is spaced apart from the first hole 131 along the radial direction of the first hole 131, and the ball head 221 is closely attached to the ball socket 134.

[0060] Optionally, such as Figure 4As shown, the side of the lower fixing plate 13 adjacent to the side block 52 has multiple pointed teeth 132, which are arranged circumferentially around the first hole 131. It can be understood that when the side block screw 2 is installed and fixed to the fusion plate 1, the end cap and ball head of the side block screw 2 can move towards the lower fixing plate 13 to gradually fit the lower fixing plate 13 onto the side block 52. Since the side of the lower fixing plate 13 adjacent to the side block 52 has multiple pointed teeth 132, these teeth can be embedded into the side block 52 under the downward pressure of the lower fixing plate 13, further improving the fixing effect between the fusion plate 1 and the side block 52 and reducing the probability of the fusion plate 1 and the side block 52 becoming loose or misaligned.

[0061] Furthermore, such as Figure 7 As shown, the lower fixing plate 13 has a first arcuate surface 133 facing the side block 52, and the first arcuate surface 133 protrudes in a direction away from the side block 52. It can be understood that the curvature of the first arcuate surface 133 is approximately equal to the curvature of the side block 52, so that the lower fixing plate 13 and the side block 52 fit more closely, thereby improving the firmness of the installation of the lower fixing plate 13 and the side block 52.

[0062] For example, the side of the lower fixing plate 13 facing the side block 52 has an anti-slip coating (not shown), which can make the lower fixing plate 13 fit more firmly with the side block 52, so as to avoid the problem of positional displacement between the fusion plate 1 and the side block 52 during installation.

[0063] Optionally, the thickness of the lower fixation plate 13 is greater than the thickness of either the upper fixation plate 11 or the connecting plate 12. Understandably, the lower fixation plate 13 is thicker than the upper fixation plate 11 and the connecting plate 12. This prevents deformation of the lower fixation plate 13, improves the overall fixation strength of the fusion plate 1, and, because the upper fixation plate 11 and the connecting plate 12 are thinner, it prevents them from irritating surrounding tissues and causing inflammatory symptoms.

[0064] Optionally, such as Figure 4 and Figure 6 As shown, the fusion plate 1 also includes a first support leg 14, which is located at the connection point between the connecting plate 12 and the lower fixing plate 13. The first support leg 14 extends toward the side block 52, and the angle between the extension direction of the first support leg 14 and the lower fixing plate 13 is α, where 90°≤α≤120°. For example, α can be 90°, 100°, 105°, 110°, 115°, or 120°.

[0065] Preferably, α is selected between 110° and 115°.

[0066] The inventors of this application discovered through experimental research that when the angle between the extension direction of the first support leg 14 and the lower fixing plate 13 is designed with the above parameters, the contact area between the fusion plate 1 and the side block 52 can be increased. That is, the first support leg 14 and the lower fixing block can abut against the side block 52 from different directions, which is beneficial to improving the firmness of the fusion plate 1 after implantation.

[0067] Optionally, such as Figure 4 and Figure 6 As shown, the connecting plate 12 includes a first arc-shaped plate 121 and a second arc-shaped plate 122. The upper fixing plate 11, the first arc-shaped plate 121, the second arc-shaped plate 122, and the lower fixing plate 13 are connected in sequence. The included angle between the first arc-shaped plate 121 and the second arc-shaped plate 122 is an obtuse angle, and both the first arc-shaped plate 121 and the second arc-shaped plate 122 protrude in the direction away from the side block 52. It can be understood that the first arc-shaped plate 121 and the second arc-shaped plate 122 are both arched structures, which can further improve the structural strength of the connecting plate 12 and help increase the space for opening the spinal canal.

[0068] Since the included angle between the first arc plate 121 and the second arc plate 122 is an obtuse angle, the shape of the connecting plate 12 can match the cone body 5 more closely.

[0069] Furthermore, such as Figure 4 and Figure 6 As shown, the fusion plate 1 also includes a second support leg 15, which is located at the connection between the first arc-shaped plate 121 and the second arc-shaped plate 122. The second support leg 15 extends in a direction away from the lower fixation plate 13. The upper fixation plate 11, the first arc-shaped plate 121, and the second support leg 15 form a clamping cavity 16. It can be understood that the clamping cavity 16 can wrap around the cross-section of the lamina 51 on the opening side to improve the firmness of the connection between the upper fixation plate 11 and the lamina 51, and greatly reduce the probability of a decrease in the closing or opening angle of the lamina 51 after surgery.

[0070] In some embodiments, such as Figure 4 , Figure 5 and Figure 13 As shown, the upper fixation plate 11 has two second holes 112 extending through its thickness direction, spaced apart along the width direction of the upper fixation plate 11. A second screw 3 is inserted into each of the two second holes 112. It can be understood that arranging the two second holes 112 side-by-side along the width direction of the upper fixation plate 11, compared to the arrangement of "two second holes 112 spaced apart along the length direction of the fusion plate 1," eliminates the need for excessive stripping of muscle tissue and ligaments attached to the vertebral lamina 51, minimizing damage to the vertebral lamina 51. This facilitates placement via the intermuscular approach, allows for minimally invasive surgery, and promotes postoperative recovery for the patient.

[0071] Optionally, such as Figure 8 As shown, the upper fixation plate 11 has a second arcuate surface 111 facing the vertebral lamina 51 of the vertebral body 5, and the second arcuate surface 111 protrudes in a direction away from the vertebral lamina 51. It can be understood that the curvature of the second arcuate surface 111 is approximately equal to the curvature of the vertebral lamina 51, so that the upper fixation plate 11 fits the vertebral lamina 51 more closely, thereby improving the stability of the installation of the upper fixation plate 11 and the vertebral lamina 51.

[0072] like Figure 1 and Figure 13 As shown, another embodiment of the nail-rod fixation system of the present invention includes a connecting rod and multiple fusion devices. The fusion devices are the fusion devices of the present invention. The multiple fusion devices are arranged one-to-one on multiple vertebral bodies 5. The connecting rod is connected to multiple side block screws 2.

[0073] It is understandable that the end cap of the side block screw 2 is provided with a U-shaped groove 21, the connecting rod can be inserted into the U-shaped groove 21, and the screw plug 4 can be screwed into the opening of the U-shaped groove 21 to press the connecting rod, thereby completing the fixing of the connecting rod and the fusion device.

[0074] According to an embodiment of the present invention, the rod-and-screw fixation system has a first hole 131 on the lower fixation plate 13, meaning that the lower fixation plate 13 only requires one lateral block screw 2 for fixation. This is controlled by the screw insertion angle and direction, which not only reduces damage to the vertebral body 5 and surrounding soft tissues from multiple screws, but also further reduces damage caused by the screw insertion angle because the lateral block screw 2 extends obliquely towards the anterior side and lateral side of the fusion plate 1. This also allows for a better implantation angle for the lateral block screw 2, improving the stability of the connection between the lateral block screw 2 and the lateral block 52, and reducing the risk of nerve root damage during lateral block screw 2 implantation. Furthermore, because the lateral block screw 2 can closely adhere to and press against the lower fixation plate 13, it provides additional contact surface, improving the stability of the connection between the lower fixation plate 13 and the lateral block screw 2 and the lateral block 52. Effective fixation of the fusion plate 1 can be achieved after only installing the lateral block screw 2. Therefore, the rod-and-screw fixation system of the present invention can be immediately and securely installed on the patient, accelerating the surgical process, reducing damage to the vertebral body 5 and surrounding soft tissues, promoting postoperative recovery, and achieving good implantation results.

[0075] On the other hand, the pin-rod fixation system of the present invention can simultaneously fix and correct the cervical spine while treating symptoms of cervical spinal stenosis, avoiding the problem that traditional open-plate systems cannot accommodate posterior cervical pin-rod systems. Furthermore, it allows for simultaneous treatment in one procedure, avoiding two surgeries and significantly reducing the treatment cycle.

[0076] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0078] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0079] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0080] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0081] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. An instant fixation fusion device, characterized in that, include: A fusion plate, comprising an upper fixing plate, a connecting plate, and a lower fixing plate connected in sequence, wherein the lower fixing plate has only one first hole; A lateral block screw passes through the first hole and is used to connect to the lateral block of the vertebral body. From the end cap to the tip of the lateral block screw, the lateral block screw extends obliquely toward the front side and the outer side of the fusion plate. The lateral block screw can closely adhere to and press against the lower fixing plate. The side of the lower fixing plate adjacent to the lateral block has a plurality of sharp teeth arranged circumferentially around the first hole. The lower fixing plate has a first arcuate surface facing the lateral block, and the first arcuate surface protrudes in a direction away from the lateral block. The upper fixing plate has a second arcuate surface facing the vertebral lamina of the vertebral body, and the second arcuate surface protrudes in a direction away from the vertebral lamina. The lower fixing plate is provided with a ball socket, which is spaced apart from the first hole along the radial direction of the first hole. The side block screw includes a first screw and an end cap. The first screw has a ball head, and the end cap has a U-shaped groove. Part of the ball head fits in the U-shaped groove, and another part of the ball head presses against at least one of the ball socket and the upper surface of the lower fixing plate.

2. The instantaneous fixation and fusion device according to claim 1, characterized in that, The deflection angle of the side block screw toward the front side of the fusion plate is β, and the deflection angle of the side block screw toward the outside of the fusion plate is γ, wherein 20°≤β≤30° and 10°≤γ≤20°.

3. The instantaneous fixation and fusion device according to claim 1, characterized in that, The first hole is a strip-shaped hole, which extends obliquely toward the front side of the fusion plate and the outer side of the fusion plate.

4. The instantaneous fixation and fusion device according to claim 1, characterized in that, The first hole gradually narrows from top to bottom, and the angle between the inner wall of the first hole and the axis of the first hole is θ, where 0 < θ ≤ 10°.

5. The instantaneous fixation and fusion device according to claim 1, characterized in that, The side of the lower fixing plate facing the side block has an anti-slip coating; And / or, the thickness of the lower fixing plate is greater than the thickness of either the upper fixing plate or the connecting plate.

6. The instantaneous fixation and fusion device according to claim 1, characterized in that, The fusion plate also includes a first support foot, which is located at the connection position between the connecting plate and the lower fixing plate. The first support foot extends toward the side block, and the angle between the extension direction of the first support foot and the lower fixing plate is α, where 90°≤α≤120°.

7. The instantaneous fixation and fusion device according to claim 1, characterized in that, The connecting plate includes a first arc-shaped plate and a second arc-shaped plate. The upper fixing plate, the first arc-shaped plate, the second arc-shaped plate and the lower fixing plate are connected in sequence. The included angle between the first arc-shaped plate and the second arc-shaped plate is an obtuse angle, and both the first arc-shaped plate and the second arc-shaped plate protrude in a direction away from the side block.

8. The instantaneous fixation and fusion device according to claim 7, characterized in that, The fusion plate also includes a second support foot, which is located at the connection position of the first arc plate and the second arc plate. The second support foot extends in a direction away from the lower fixed plate, and the upper fixed plate, the first arc plate and the second support foot form a clamping cavity.

9. The instantaneous fixation and fusion device according to claim 1, characterized in that, The upper fixing plate has a second hole that extends through it along its thickness direction. There are two second holes, which are spaced apart along the width direction of the upper fixing plate. A second screw is inserted into each of the two second holes.

10. A nail-bar fixing system, characterized in that, include: Multiple instant fixation and fusion devices, wherein the fusion device is the instant fixation and fusion device according to any one of claims 1-9, and the multiple instant fixation and fusion devices are arranged one-to-one on the multiple vertebral bodies; A connecting rod, which is connected to a plurality of the side block screws.

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