Instant fixing fusion device and nail rod fixing system

Abstract

The invention relates to an instant fixing fusion device and a screw rod fixing system.The instant fixing fusion device comprises a fusion plate and a side block screw, the fusion plate comprises an upper fixing plate, a connecting plate and a lower fixing plate which are sequentially connected, a first hole is formed in the lower fixing plate, and the side block screw penetrates through the first hole; the side mass screw is arranged on the fusion plate and used for being connected with a side mass of a vertebral body, the side mass screw obliquely extends towards the front side of the fusion plate and the outer side of the fusion plate in the direction from an end cap of the side mass screw to the tip end of the side mass screw, and the side mass screw can be tightly attached to and press the lower fixing plate. The instant fixing fusion device can be instantly and stably installed on a patient in the operation process, the operation process is accelerated, damage to the vertebral body and surrounding soft tissue is reduced, and postoperative recovery of the patient is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to an instant fixation and fusion device and a nail-rod fixation system. Background Art

[0002] Clinically, the most commonly used surgical method for diseases such as cervical spinal stenosis is posterior cervical single-open-door laminoplasty to expand and decompress the spinal canal. In most cervical laminoplasty surgeries, a fusion plate needs to be implanted to expand and shape the spinal canal to achieve a decompression effect. In related technologies, the structural design of the fusion plate is unreasonable, and the effect is poor when only ordinary screws are used; but if it is used directly with lateral mass screws, it will cause greater damage to the vertebral body and surrounding soft tissues when the fusion plate is implanted, which is not conducive to the patient's postoperative recovery. Summary of the invention

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

[0004] To this end, an embodiment of the present invention provides an instant fixation and fusion device, which can be instantly and firmly installed on the patient during surgery, thereby speeding up the surgical process, reducing damage to the vertebral body and surrounding soft tissues, and facilitating the patient's postoperative recovery.

[0005] An embodiment of the present invention further provides a nail bar fixing system.

[0006] The instant fixation and fusion device of an embodiment of the present invention comprises: a fusion plate, wherein the fusion plate comprises an upper fixation plate, a connecting plate and a lower fixation plate connected in sequence, wherein a first hole is provided on the lower fixation plate; a lateral mass screw, wherein the lateral mass screw is passed through the first hole and is used to be connected to the lateral mass of a vertebral body, wherein in the direction from the end cap of the lateral mass screw to the tip of the lateral mass screw, the lateral mass screw extends obliquely toward the front side of the fusion plate and the outer side of the fusion plate, and the lateral mass screw can be closely attached to and press the lower fixation plate.

[0007] According to the instant fixation and fusion device of the embodiment of the present invention, since a first hole is provided on the lower fixing plate, that is, the lower fixing plate only needs one lateral mass screw for fixation, and is controlled by the angle and direction of the screw insertion, it can not only reduce the damage of multiple screws to the vertebral body and the surrounding soft tissues, but also because the lateral mass screw extends obliquely toward the front side of the fusion plate and the outside of the fusion plate, further reducing the damage caused by the angle of the screw insertion, and can also make the implantation angle of the lateral mass screw better, which is conducive to improving the firmness of the connection between the lateral mass screw and the lateral mass, and reducing the risk of damaging the nerve root when the lateral mass screw is implanted. In addition, since the lateral mass screw can be close to and press the lower fixing plate, an additional contact surface is provided, which can improve the stability of the connection between the lower fixing plate and the lateral mass screw and the lateral mass, and the effective fixation of the fusion plate can be achieved after only the lateral mass screw is installed. Therefore, the instant fixation and fusion device of the embodiment of the present invention can be immediately and firmly installed on the patient, speeding up the surgical process, reducing the damage to the vertebral body and the surrounding soft tissues, and is conducive to the patient's postoperative recovery, and the implantation effect is better.

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

[0009] In some embodiments, the first hole is a strip hole, and the strip hole 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, wherein 0<θ≤10°.

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

[0011] In some embodiments, a surface of the lower fixing plate adjacent to the side block has a plurality of sharp teeth, and the plurality of sharp teeth are arranged circumferentially around the first hole; and / or the lower fixing plate has a first arcuate surface facing the side block, and the first arcuate surface protrudes in a direction away from the side block; and / or a surface 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 also includes a first supporting foot, which is arranged at the connecting position between the connecting plate and the lower fixed plate, and the first supporting foot extends in the direction of the side block, and the angle between the extension direction of the first supporting foot and the lower fixed plate is α, wherein 90°≤α≤120°.

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

[0014] In some embodiments, the fusion plate also includes a second supporting foot, which is arranged at the connecting position of the first curved plate and the second curved plate, and the second supporting foot extends in a direction away from the lower fixed plate, and the upper fixed plate, the first curved plate and the second supporting foot form a clamping cavity.

[0015] In some embodiments, the upper fixation plate has a second hole extending through the upper fixation plate along its thickness direction, there are two second holes, and the second holes are arranged at intervals along the width direction of the upper fixation plate, and a second screw is passed through the two second holes; and / or the upper fixation plate has a second curved surface facing the vertebral plate of the vertebral body, and the second curved surface protrudes in a direction away from the vertebral plate.

[0016] A nail-rod fixation system according to another embodiment of the present invention comprises 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 according to 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 mass screws.

[0017] According to the nail-rod fixing system of the embodiment of the present invention, since a first hole is provided on the lower fixing plate, that is, the lower fixing plate only needs one lateral mass screw for fixing, and is controlled by the angle and direction of the screw insertion, it can not only reduce the damage of multiple screws to the vertebral body and the surrounding soft tissues, but also since the lateral mass screw extends obliquely toward the front side of the fusion plate and the outside of the fusion plate, the damage caused by the screw insertion angle is further reduced, and the implantation angle of the lateral mass screw is also better, which is conducive to improving the firmness of the connection between the lateral mass screw and the lateral mass, and reducing the risk of damaging the nerve root when the lateral mass screw is implanted. In addition, since the lateral mass screw can be close to and press the lower fixing plate, an additional contact surface is provided, which can improve the stability of the connection between the lower fixing plate and the lateral mass screw and the lateral mass, and the effective fixation of the fusion plate can be achieved after only the lateral mass screw is installed. Therefore, the nail-rod fixing system of the embodiment of the present invention can be immediately and firmly installed on the patient, speeding up the surgical process, reducing the damage to the vertebral body and the surrounding soft tissues, and is conducive to the patient's postoperative recovery, and the implantation effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of an instant fixation and fusion device according to an embodiment of the present invention.

[0019] Figure 2 4 is a schematic diagram of the instant fixation and fusion device according to an embodiment of the present invention from another perspective.

[0020] Figure 3 4 is a schematic diagram of the instant fixation and fusion device according to an embodiment of the present invention from another viewing angle.

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

[0022] Figure 5 4 is a schematic diagram of a fusion plate of the instant fixation and fusion device according to an embodiment of the present invention from another perspective.

[0023] Figure 6 4 is a schematic diagram of a fusion plate of the instant fixation and fusion device according to an embodiment of the present invention from another perspective.

[0024] Figure 7 4 is a schematic diagram of a fusion plate of the instant fixation and fusion device according to an embodiment of the present invention from another perspective.

[0025] Figure 8 4 is a cross-sectional view of an upper fixation plate of a fusion plate of an immediate fixation and fusion device according to an embodiment of the present invention.

[0026] Fig. 9 4 is a cross-sectional view of a fusion plate of an immediate fixation and fusion device according to an embodiment of the present invention.

[0027] Fig.10Schematic diagram of a fusion plate of an immediate fixation and fusion device according to another embodiment of the present invention.

[0028] Fig.11 is a cross-sectional view of a fusion plate of an immediate fixation and fusion device according to another embodiment of the present invention.

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

[0030] Fig.13 It 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] Reference numerals:

[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 teeth; 133. First arc-shaped surface; 134. Socket; 14. First supporting foot; 15. Second supporting foot; 16. Clamping cavity;

[0033] 2. side mass screw; 21. U-shaped groove; 22. first screw; 221. ball head; 23. end cap;

[0034] 3. Second screw;

[0035] 4. Screw plug;

[0036] 5. Vertebral body; 51. Vertebral lamina; 52. Lateral mass. DETAILED DESCRIPTION

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

[0038] Please refer to the following Figures 1 to 13 An immediate fixation and fusion device and a nail-rod fixation system according to an embodiment of the present invention are described.

[0039] like Figures 1 to 4 As shown, the instant fixation and fusion device of the embodiment of the present invention includes: a fusion plate 1 and a lateral mass 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, a first hole 131 is provided on the lower fixation plate 13, the lateral mass screw 2 is passed through the first hole 131, and is used to be connected to the lateral mass 52 of the vertebral body 5, in the direction from the end cap of the lateral mass screw 2 to the tip of the lateral mass screw 2, the lateral mass screw 2 extends obliquely toward the front side of the fusion plate 1 and the outer side of the fusion plate 1, and the lateral mass screw 2 can be tightly attached to and press the lower fixation plate 13.

[0040] It should be noted that the front-to-back direction of the fusion plate 1 (eg Figure 2 The X direction in the figure is consistent with the width direction of the fusion plate 1. The front side of the fusion plate 1 is one side in the width direction of the fusion plate 1. The inner and outer directions of the fusion plate 1 (such as Figure 3 The Z direction in the figure is consistent with the length direction of the fusion plate 1. The side of the fusion plate 1 where the upper fixing plate 11 is set is the inner side of the fusion plate 1, and the side of the fusion plate 1 where the lower fixing plate 13 is set is the outer side of the fusion plate 1. The up-down 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 lifted vertebral plate 51 through the upper fixing plate 11 , and fix it with the side mass 52 on the same side through the lower fixing plate 13 , so as to form a stable bridging structure.

[0042] According to the instant fixation and fusion device of the embodiment of the present invention, since a first hole 131 is provided on the lower fixation plate 13, that is, the lower fixation plate 13 only needs one lateral mass screw 2 for fixation, and is controlled by the angle and direction of screw insertion, not only can the damage of multiple screws to the vertebral body 5 and surrounding soft tissues be reduced, but also since the lateral mass screw 2 extends obliquely toward the front side of the fusion plate 1 and the outer side of the fusion plate 1, the damage caused by the screw insertion angle is further reduced, and the implantation angle of the lateral mass screw 2 can be better, which is beneficial to improve the firmness of the connection between the lateral mass screw 2 and the lateral mass 52, and reduce the risk of damaging the nerve root when the lateral mass screw 2 is implanted.

[0043] In addition, since the lateral mass screws 2 can fit tightly against and press the lower fixing plate 13, an additional contact surface is provided, which can improve the stability of the connection between the lower fixing plate 13 and the lateral mass screws 2 and the lateral mass 52, and the fusion plate 1 can be effectively fixed after only the lateral mass screws 2 are installed.

[0044] Therefore, the instant fixation and fusion device of the embodiment of the present invention can be instantly and firmly installed on the patient, which speeds up the surgical process, reduces damage to the vertebral body 5 and surrounding soft tissues, is beneficial to the patient's postoperative recovery, and has a better implantation effect.

[0045] On the other hand, patients implanted with the immediate fixation and fusion device of the embodiment of the present invention can perform functional exercises earlier, prevent neck muscle atrophy and tissue adhesion, effectively maintain the normal physiological lordosis of the cervical spine, improve the mobility of the cervical spine, and reduce the discomfort caused by long-term wearing of a neck brace.

[0046] It is understandable that the instant fixation and fusion device of the embodiment of the present invention, compared with the solution of "arranging a plurality of first holes 131 on the upper fixation plate 11", does not increase the damage to the lateral mass 52, and has lower requirements on the placement of the lower fixation plate 13, which is conducive to shortening the doctor's operation time. The instant fixation and fusion device of the embodiment of the present invention can fix the fusion plate 1 and the lateral mass 52 with a single lateral mass screw 2, and has a good fixation effect, which can effectively prevent the problem of closing or reducing the opening angle of the vertebral plate 51 after surgery.

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

[0048] In other words, the lateral mass screw 2 may be a screw connected to the nail-rod fixation system, or may not be a screw connected to the nail-rod fixation system, that is, the lateral mass screw 2 may be a common medical fastening screw.

[0049] In one example, the end of the lateral mass screw 2 of the instant fixation and fusion device of an embodiment of the present invention can be used to fix the connecting rod. Since the lateral mass screw 2 can be tightly attached to and press the lower fixing plate 13, and has the function of fixing the connecting rod, compared with the solution of "the lower fixing plate 13 of the fusion plate 1 is simultaneously provided with the lateral mass 52 fixing screws and the nail rod fixing screws", the present invention can reduce the number of screws used and will not increase the area of ​​the lower fixing plate 13, thereby reducing the area of ​​the surgical incision and facilitating the patient's postoperative recovery.

[0050] Alternatively, if Figure 2 As shown, the deflection angle of the lateral mass screw 2 toward the front side of the fusion plate 1 is β, and the deflection angle of the lateral mass screw 2 toward the outside of the fusion plate 1 is γ, wherein 20°≤β≤30°, 10°≤γ≤20°.

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

[0052] The inventors of the present application have discovered through experimental research that when the lateral mass screw 2 is inserted in the above-mentioned manner, the problem of damaging peripheral nerves or blood vessels during implantation of the lateral mass screw 2 can be further reduced, and the fixation strength can be increased to a higher level, thereby reducing the risk of loosening of the lateral mass screw 2.

[0053] For example, the lateral mass screw 2 is connected to the lateral mass 52 in a bicortical fixation manner, so that the lateral mass screw 2 is more firmly implanted.

[0054] Alternatively, if Figure 5As shown, the first hole 131 is a strip hole, and the strip hole extends obliquely toward the front side of the fusion plate 1 and the outside of the fusion plate 1. Thus, a larger activity space and a larger swing angle amplitude can be provided for the first screw member, so that the installation and positioning of the fusion plate 1 are more flexible, and the use requirements of most patients can be met, which is conducive to improving the flexibility of the fusion device when used, and has a wider range of applications.

[0055] Alternatively, if Fig. 9 As shown, the first hole 131 gradually narrows from top to bottom, and 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 is a trumpet-shaped opening structure, which can control the minimum deflection angle of the lateral mass screw 2 and the screw insertion angle of the lateral mass screw 2, thereby improving the implantation effect of the lateral mass screw 2.

[0056] Alternatively, if Figures 1 to 3 As shown, a ball socket 134 is provided on the lower fixing plate 13, 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 the ball socket 134 and one of the upper surfaces of the lower fixing plate 13.

[0057] It is understandable that the ball head 221 can be universally rotated relative to the U-shaped groove 21 to adjust the screw insertion angle of the lateral mass screw 2, and the U-shaped groove 21 is used to fix the connecting rod. Because part of the ball head 221 fits in the U-shaped groove 21, and the other part of the ball head 221 is tightly attached to and presses 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 lateral mass 52, thereby improving the stability of the fusion plate 1 after implantation.

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

[0059] For example, 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] Alternatively, if Figure 4As shown, the side of the lower fixing plate 13 adjacent to the side mass 52 has a plurality of sharp teeth 132, and the plurality of sharp teeth 132 are arranged circumferentially around the first hole 131. It can be understood that when the side mass screw 2 is installed and fixed to the fusion plate 1, the end cap and the ball head of the side mass screw 2 can move toward the direction of the lower fixing plate 13 to gradually fit the lower fixing plate 13 to the side mass 52. Since the side of the lower fixing plate 13 adjacent to the side mass 52 has a plurality of sharp teeth 132, the sharp teeth 132 can be embedded into the side mass 52 under the downward pressure of the lower fixing plate 13, so as to further improve the fixing effect of the fusion plate 1 and the side mass 52, and reduce the probability of the fusion plate 1 and the side mass 52 being loosened or misaligned.

[0061] Furthermore, if 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 substantially equal to the curvature of the side block 52, so that the lower fixing plate 13 and the side block 52 are more closely fitted, thereby improving the firmness of the installation of the lower fixing plate 13 and the side block 52.

[0062] For another 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 to avoid the problem of positional displacement between the fusion plate 1 and the side block 52 when installing.

[0063] Optionally, the thickness of the lower fixing plate 13 is greater than the thickness of any one of the upper fixing plate 11 and the connecting plate 12. It is understandable that the thickness of the lower fixing plate 13 is thicker than that of the upper fixing plate 11 and the connecting plate 12. This can prevent the position of the lower fixing plate 13 from being deformed, which is beneficial to improving the overall fixing strength of the fusion plate 1, and because the position of the upper fixing plate 11 and the connecting plate 12 is thinner, it can prevent the upper fixing plate 11 and the connecting plate 12 from irritating the surrounding tissues and causing inflammatory symptoms.

[0064] Alternatively, if Figure 4 and Figure 6 As shown, the fusion plate 1 further includes a first support leg 14, which is disposed at the connection position between the connection plate 12 and the lower fixing plate 13, and 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, wherein 90°≤α≤120°. For example, α may be 90°, 100°, 105°, 110°, 115°, or 120°.

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

[0066] The inventors of the present application have discovered through experimental research that when the angle between the extension direction of the first supporting leg 14 and the lower fixing plate 13 is designed using the above-mentioned parameters, the contact area between the fusion plate 1 and the side block 52 can be increased, that is, the first supporting 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] Alternatively, if Figure 4 and Figure 6 As shown, the connecting plate 12 includes a first curved plate 121 and a second curved plate 122, the upper fixing plate 11, the first curved plate 121, the second curved plate 122 and the lower fixing plate 13 are connected in sequence, the angle between the first curved plate 121 and the second curved plate 122 is an obtuse angle, and the first curved plate 121 and the second curved plate 122 both protrude in a direction away from the lateral mass 52. It can be understood that the first curved plate 121 and the second curved plate 122 are both arched structures, thereby further improving the structural strength of the connecting plate 12 and facilitating the increase of the space for the spinal canal opening.

[0068] Since the included angle between the first curved plate 121 and the second curved plate 122 is an obtuse angle, the outer shape of the connecting plate 12 can be more closely matched with the vertebral body 5 .

[0069] Furthermore, if Figure 4 and Figure 6 As shown, the fusion plate 1 further includes a second support leg 15, which is disposed at the connection position of the first arc plate 121 and the second arc plate 122, and the second support leg 15 extends in a direction away from the lower fixing plate 13, and the upper fixing plate 11, the first arc plate 121 and the second support leg 15 form a clamping cavity 16. It can be understood that the clamping cavity 16 can wrap the section of the vertebral plate 51 on the door opening side to improve the firmness of the connection between the upper fixing plate 11 and the vertebral plate 51, and greatly reduce the probability of the vertebral plate 51 closing or reducing the door opening angle after the patient's operation.

[0070] In some embodiments, Figure 4 , Figure 5 and Fig.13 As shown, the upper fixing plate 11 has a second hole 112 penetrating along the thickness direction thereof, and there are two second holes 112, which are arranged at intervals along the width direction of the upper fixing plate 11, and the second screws 3 are inserted into the two second holes 112. It can be understood that the two second holes 112 are arranged side by side along the width direction of the upper fixing plate 11. Compared with the scheme of "the two second holes 112 are arranged at intervals along the length direction of the fusion plate 1", there is no need to excessively peel off the muscle tissue and ligaments attached to the vertebral plate 51, and the damage to the vertebral plate 51 can be minimized, which is convenient for placement through the intermuscular approach, and the doctor can perform minimally invasive operation, which is beneficial to the patient's postoperative recovery.

[0071] Alternatively, if Figure 8 As shown, the upper fixing plate 11 has a second curved surface 111 facing the vertebral plate 51 of the vertebral body 5, and the second curved surface 111 protrudes in a direction away from the vertebral plate 51. It can be understood that the curvature of the second curved surface 111 is substantially equal to the curvature of the vertebral plate 51, so that the upper fixing plate 11 and the vertebral plate 51 are more closely fitted, thereby improving the firmness of the installation of the upper fixing plate 11 and the vertebral plate 51.

[0072] like Figure 1 and Fig.13 As shown, a nail-rod fixation system according to another embodiment of the present invention comprises a connecting rod and a plurality of fusion devices, wherein the fusion device is the fusion device of the present invention, the plurality of fusion devices are arranged one by one on a plurality of vertebral bodies 5, and the connecting rod is connected to a plurality of lateral mass screws 2.

[0073] It can be understood that a U-shaped groove 21 is provided on the end cap of the lateral mass screw 2, a connecting rod can be inserted into the U-shaped groove 21, and a screw plug 4 can be screwed into the opening of the U-shaped groove 21 to compress the connecting rod, thereby completing the fixing work of the connecting rod and the fusion device.

[0074] According to the nail-rod fixing system of the embodiment of the present invention, since a first hole 131 is provided on the lower fixing plate 13, that is, the lower fixing plate 13 only needs one lateral mass screw 2 for fixing, and is controlled by the angle and direction of the screw insertion, it can not only reduce the damage of multiple screws to the vertebral body 5 and the surrounding soft tissues, but also since the lateral mass screw 2 extends obliquely toward the front side of the fusion plate 1 and the outside of the fusion plate 1, the damage caused by the screw insertion angle is further reduced, and the implantation angle of the lateral mass screw 2 can be better, which is conducive to improving the firmness of the connection between the lateral mass screw 2 and the lateral mass 52, and reducing the risk of damaging the nerve root when the lateral mass screw 2 is implanted. In addition, since the lateral mass screw 2 can be closely attached to and press the lower fixing plate 13, an additional contact surface is provided, which can improve the stability of the connection between the lower fixing plate 13 and the lateral mass screw 2 and the lateral mass 52, and the fusion plate 1 can be effectively fixed after only the lateral mass screw 2 is installed. Therefore, the nail-rod fixing system of the embodiment of the present invention can be immediately and firmly installed on the patient, speeding up the surgical process, reducing the damage to the vertebral body 5 and the surrounding soft tissues, and is conducive to the patient's postoperative recovery, and the implantation effect is better.

[0075] On the other hand, the nail-rod fixation system of the embodiment of the present invention can fix and correct the cervical spine while treating the symptoms of cervical spinal stenosis, avoiding the problem that the traditional open-door plate cannot take into account the posterior cervical nail-rod system. It can also treat both at one time, avoiding two surgical treatments, and greatly reducing the treatment cycle.

[0076] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0077] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0078] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0080] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0081] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An instant fixation and fusion device, characterized in that: include: A fusion plate, the fusion plate comprising an upper fixing plate, a connecting plate and a lower fixing plate connected in sequence, wherein a first hole is provided on the lower fixing plate; A lateral mass screw is passed through the first hole and is used to connect with the lateral mass of the vertebral body. In the direction from the end cap of the lateral mass screw to the tip of the lateral mass screw, the lateral mass screw extends obliquely toward the front side of the fusion plate and the outside of the fusion plate, and the lateral mass screw can be tightly attached to and press the lower fixation plate.

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

3. The instant fixation and fusion device according to claim 1, characterized in that: The first hole is a strip-shaped hole, and the strip-shaped hole 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 an angle between an inner wall surface of the first hole and an axis of the first hole is θ, wherein 0<θ≤10°.

4. The instant fixation and fusion device according to claim 1, characterized in that: A ball socket is provided on the lower fixing plate, 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 in the U-shaped groove, and the other part of the ball head at least presses the ball socket and one of the upper surfaces of the lower fixing plate.

5. The instant fixation and fusion device according to claim 1, characterized in that: The lower fixing plate has a plurality of sharp teeth on one side adjacent to the side block, and the plurality of sharp teeth are arranged circumferentially around the first hole; And / or, the lower fixing plate has a first arcuate surface facing the side block, and the first arcuate surface protrudes in a direction away from the side block; and / or, a 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 any one of the upper fixing plate and the connecting plate.

6. The instant fixation and fusion device according to claim 1, characterized in that: The fusion plate also includes a first supporting foot, which is arranged at a connecting position between the connecting plate and the lower fixing plate, and the first supporting foot extends toward the side block, and an angle α is formed between the extending direction of the first supporting foot and the lower fixing plate, wherein 90°≤α≤120°.

7. The instant fixation and fusion device according to claim 1, characterized in that: The connecting plate includes a first curved plate and a second curved plate, the upper fixed plate, the first curved plate, the second curved plate and the lower fixed plate are connected in sequence, the angle between the first curved plate and the second curved plate is an obtuse angle, and the first curved plate and the second curved plate both protrude in a direction away from the side block.

8. The instant fixation and fusion device according to claim 7, characterized in that: The fusion plate also includes a second supporting foot, which is arranged at the connecting position of the first arc plate and the second arc plate, and the second supporting foot extends in a direction away from the lower fixing plate. The upper fixing plate, the first arc plate and the second supporting foot form a clamping cavity.

9. The instant fixation and fusion device according to claim 1, characterized in that: The upper fixing plate has a second hole penetrating along the thickness direction thereof, the second holes are two and are arranged at intervals 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 fixation plate has a second curved surface facing the vertebral lamina of the vertebral body, and the second curved surface protrudes in a direction away from the vertebral lamina.

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

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