Dynamic stabilizing structure for spinal surgery

Abstract

The invention discloses a dynamic stabilizing structure for spinal surgery, which comprises a connector for connecting a device main body, a mounting block is mounted on the side surface of the connector, a limiting column of a strip-shaped structure is mounted on the end surface of the mounting block, and the connector is of a two-block spliced structure. An elastic component in a spring form is fixedly mounted between the two connectors, a protective cover fixedly connected with the connectors is arranged outside the elastic component, and the protective cover is made of a silica gel material capable of being implanted into a human body. According to the dynamic stabilizing structure for the spinal operation, a novel structural design is adopted, the limiting column is fixedly installed on the side face of the spinal column through the pedicle screw, at the moment, the elastic assembly between the two connectors is used for providing certain pulling force, and therefore the purpose of dynamically stabilizing the spinal column is achieved; during installation, the purpose of stepless adjustment is achieved by enabling the adjusting sliding block to slide in the adjusting sliding groove, and therefore the purpose of completely adapting to the spine is achieved.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, in particular to a dynamic stabilization structure for spinal surgery. Background Art

[0002] Dynamic stabilization in spinal surgery involves the use of certain surgical techniques and devices to provide a degree of stability without completely immobilizing the spine, thereby allowing the spine to maintain function and flexibility during movement. This approach is commonly used to treat various spinal conditions, such as scoliosis, herniated discs, and spinal compression fractures.

[0003] As in the prior art, Chinese patent publication number CN2115363728A discloses a dynamic stabilization system for the spine, which includes a joint head, a joint cavity, a connecting block, a connecting shaft, and a fixing nail; the joint head includes a joint head head and a connecting rod, and the joint head head is fixed to one end of the connecting rod; the two connecting blocks are symmetrically placed on both sides of the connecting rod and fixed by the fixing nail; the joint cavity includes an acetabulum and a connecting rod, and the acetabulum is fixed to one end of the connecting rod; the joint head head is installed in the acetabulum, and the joint head head can rotate to a predetermined bending angle in the acetabulum; the connecting rod has a through groove, the connecting shaft is placed in the through groove, and is fixed by the fixing nail; the dynamic stabilization system is fixed to the corresponding vertebra of the spine by pedicle screws.

[0004] For example, in the prior art, a Chinese patent with publication number CN115363731A discloses a dynamic stabilization structure for spinal surgery, which includes a dynamic pedicle screw, which includes a first joint part, a second joint part and a third joint part; the first joint part includes a stud, a thread and a joint head; the second joint part includes a first sliding part, an interlayer and a cover plate; the interlayer is placed in a first accommodating cavity in the first sliding part, and the joint head is placed in a second accommodating cavity in the interlayer; the cover plate is placed on an end of the first sliding part away from the stud thread; the third joint part includes a second sliding part and a fixing plate, the second joint part is placed in the third accommodating cavity of the second sliding part, two fixing plates are symmetrically arranged on the second sliding part, and there is a fixing groove between the two fixing plates. The screwdriver is inserted into the fixing groove, and the screwdriver head is placed in the first groove, and the dynamic pedicle screw is anchored on the spine.

[0005] For example, in the prior art, a Chinese patent with publication number CN115474996A discloses a dynamic stabilization structure and auxiliary device for lumbar spine surgery, including a first component, a second component, a third component, a fourth component and a fifth component. The first component includes a wing bulge and a C-shaped groove. The second component includes a connecting rod. The C-shaped groove is arranged in the middle of the first component. The wing bulge is penetrated along the width direction of the first component and is arranged at both ends of the top and bottom surfaces of the first component. A groove structure is provided in the middle of the two wing bulges on the top and bottom surfaces of the first component. The connecting rod transversely penetrates the upper and lower ends of the first component. The third component anchors the first component and the connecting rod, and the fifth component anchors the connecting rod and the fourth component.

[0006] Based on the above materials, it can be seen that in the prior art, the stabilization device is generally fixed to the spinal position using pedicle screws to achieve the purpose of dynamic stabilization without completely fixing the spine. However, in actual use, the pedicle screws need to correspond to the hole structure of the stabilization device. Since the hole structure is fixed in position, it may not be able to adapt to the spine. Summary of the Invention

[0007] The object of the present invention is to provide a dynamic stabilization structure for spinal surgery to solve the problem in the above-mentioned background art that the position is fixed but cannot adapt to the spine.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a dynamic stabilization structure for spinal surgery, comprising a connector for connecting to a device body, a mounting block mounted on a side of the connector, and a strip-shaped limiting column mounted on an end surface of the mounting block, and further comprising: The connector is configured as a two-piece spliced ​​structure, and an elastic component in the form of a spring is fixedly installed between the two connectors. A protective cover fixedly connected to the connector is provided on the outside of the elastic component, and the protective cover is configured as a silicone material that can be implanted in the human body; An adjusting slot is provided in the interior of the limiting column and passes through the adjusting slot, and an adjusting slider is slidably installed in the adjusting slot, and a pedicle screw is installed in the adjusting slider, and the pedicle screw is drilled into the human spine. A positioning mechanism for fixing the adjusting slider to the limiting column is provided above the adjusting slider; A mounting ball head for rotatably connecting to the connector is fixedly mounted on the top of the mounting block, and a movable groove for the mounting block to move is provided on the side of the connector, and a buffer mechanism for buffering the movement of the mounting block is provided inside the movable groove; A disassembly and installation mechanism for replacing the limiting column is provided between the limiting column and the installation block.

[0009] Preferably, the positioning mechanism includes an extrusion plate installed above the adjusting slider, the pedicle screw penetrates into the extrusion plate, and a return spring is fixedly installed between the lower surface of the extrusion plate and the upper surface of the adjusting slider.

[0010] Preferably, positioning blocks are fixedly mounted on the lower surfaces of the left and right ends of the extrusion plate, and friction plates are fixedly mounted on the outer surfaces of the positioning blocks, and the outer surfaces of the friction plates are made of frosted material.

[0011] Preferably, the position of the positioning block corresponds to the position between the positioning grooves on the upper surface of the limiting column, and the inner wall of the positioning groove is also set to frosted material, and the length of the positioning groove is the same as the position length of the adjustment slide groove.

[0012] Preferably, the buffer mechanism includes a first connecting rod rotatably mounted on the outer surface of the mounting block, a second connecting rod is rotatably mounted on the upper end of the first connecting rod, and a front end of the second connecting rod is inserted into the interior of the connector.

[0013] Preferably, a piston plate is fixedly mounted on the top end of the second connecting rod, and a sealed sliding structure is formed between the piston plate and the damping chamber provided in the connecting head.

[0014] Preferably, the piston plate squeezes the air inside the damping chamber to form a buffering effect, and a buffer spring for releasing force is installed on the outside of the second connecting rod.

[0015] Preferably, the disassembly and installation mechanism includes a docking screw fixedly installed on the end surface of the limiting column, and the docking screw is threadedly connected to a docking hole provided on the end surface of the installation block.

[0016] Preferably, a snap-fit ​​groove is provided at the edge of the end face of the mounting block, and the snap-fit ​​groove corresponds to and engages with the snap-fit ​​ball, and the snap-fit ​​ball is fixedly mounted on the end face of the limiting column.

[0017] Preferably, a connecting plate with an arched structure is provided above the two corresponding connecting heads, and mounting screws are rotatably installed through the left and right ends of the connecting plate, and the mounting screws are threadedly installed between the mounting holes opened on the upper surface of the connecting head.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the dynamic stabilization structure for spinal surgery adopts a new structural design, the specific contents of which are as follows: 1. Use pedicle screws to fix the limit column on the side of the spine. At this time, the elastic component between the two connectors provides a certain pulling force to achieve the purpose of dynamic stability of the spine. Before installation, the adjustment slider is slid inside the adjustment slot to achieve the purpose of infinite adjustment, thereby achieving the purpose of fully adapting to the spine; Furthermore, when tightening the pedicle screw, the pedicle screw is used to squeeze the extrusion plate downward, so that the positioning block on the lower surface of the extrusion plate is inserted into the positioning groove at the corresponding position. At this time, the friction plate on the outer surface of the positioning block cooperates with the frosted structure on the inner wall of the positioning groove, and the strong friction force is used to achieve the purpose of fixing the adjustment slider.

[0019] 2. When the spine moves, the limit column moves synchronously. At this time, the mounting block rotates in the movable groove. During the rotation process, the mounting block moves synchronously through the first connecting rod and the second connecting rod, so that the second connecting rod drives the piston plate to slide inside the damping chamber. The piston plate squeezes the air inside the piston chamber to form a damping effect. Cooperating with the buffer spring, a buffering effect is achieved to prevent damage to the device during movement. Furthermore, the limit column is installed through a threaded connection between the docking screw and the docking hole. When a different model of limit column is needed, the limit column can be unscrewed and removed and replaced with a suitable installation column. During the installation process, the engagement between the snap ball and the snap groove is used to achieve the purpose of positioning the limit column, avoiding installation misalignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic structural diagram of the elastic component of the present invention; Figure 3 This is a structural diagram of the installation relationship between the mounting block and the connector of the present invention; Figure 4 Schematic diagram of the cross-sectional structure of the connector of the present invention; Figure 5 For the present invention Figure 4 A in the middle is an enlarged structural diagram; Figure 6 This is a schematic diagram of the installation relationship between the adjusting slider and the extrusion plate of the present invention; Figure 7 This is a schematic diagram of the friction plate installation position structure of the present invention; Figure 8 This is a schematic diagram of the connecting plate structure of the present invention; Figure 9 This is a schematic diagram of the end face structure of the mounting block of the present invention; Figure 10 This is a schematic diagram of the end face structure of the limiting column of the present invention.

[0021] In the figure: 1. Connecting head; 2. Mounting block; 3. Limiting column; 4. Adjusting slide; 5. Adjusting slider; 6. Pedicle screw; 7. Extrusion plate; 8. Return spring; 9. Positioning block; 10. Friction plate; 11. Positioning groove; 12. Elastic component; 13. Protective cover; 14. Mounting ball head; 15. Movable groove; 16. First connecting rod; 17. Second connecting rod; 18. Buffer spring; 19. Piston plate; 20. Damping chamber; 21. Connecting plate; 22. Mounting screw; 23. Mounting hole; 24. Docking screw; 25. Docking hole; 26. Engaging groove; 27. Engaging ball. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1 、 Figure 2 、 Figure 6-Figure 8In order to solve the problem that traditional devices cannot fully adapt to the spine, this embodiment provides the following technical solutions, which make the device fully adapt to the spine by infinitely adjusting the pedicle screw 6. Specifically disclosed is: a connecting head 1 for connecting the device body, and a mounting block 2 is installed on the side of the connecting head 1, and a limiting column 3 with a strip-shaped structure is installed on the end face of the mounting block 2. The connecting head 1 is configured as a two-piece spliced ​​structure, and an elastic component 12 in the form of a spring is fixedly installed between the two connecting heads 1, and a protective cover 13 fixedly connected to the connecting head 1 is provided on the outside of the elastic component 12, and the protective cover 13 is configured as a silicone material that can be implanted in the human body. An adjusting slot 4 is provided inside the limiting column 3, and an adjusting slider 5 is slidably installed inside the adjusting slot 4, and a pedicle screw 6 is installed inside the adjusting slider 5. The pedicle screw 6 is drilled into the human spine, and a member for interlocking with the limiting column 3 is provided above the adjusting slider 5. The positioning mechanism is fixed between the two ends of the adjusting slider 5, and the positioning mechanism includes an extrusion plate 7 installed above the adjusting slider 5, and the pedicle screw 6 penetrates into the extrusion plate 7, and a return spring 8 is fixedly installed between the lower surface of the extrusion plate 7 and the upper surface of the adjusting slider 5. Positioning blocks 9 are fixedly installed on the lower surfaces of the left and right ends of the extrusion plate 7, and a friction plate 10 is fixedly installed on the outer surface of the positioning block 9, and the outer surface of the friction plate 10 is set to a frosted material. The position of the positioning block 9 corresponds to the position between the positioning grooves 11 on the upper surface of the limit column 3, and the inner wall of the positioning groove 11 is also set to a frosted material, and the length of the positioning groove 11 is the same as the position length of the adjusting slide 4. A connecting plate 21 with an arched structure is provided above the corresponding two connecting heads 1, and mounting screws 22 are rotatably installed on the left and right ends of the connecting plate 21, and the mounting screws 22 are threadedly installed between the mounting holes 23 opened on the upper surface of the connecting head 1.

[0024] When the device needs to be implanted in the human body, the patient's spinal position is first exposed through surgery, and then a screw hole is drilled at the corresponding position of the spine. The pedicle screw 6 is then screwed into the screw hole. Before this, the adjusting slider 5 is slid in the adjusting slide groove 4 (the return spring 8 pushes up the extrusion plate 7 during this process) so that the adjusting slider 5 reaches the position of the corresponding screw hole. When the pedicle screw 6 is screwed in, the pedicle screw 6 squeezes the extrusion plate 7 downward, and finally the positioning block 9 under the extrusion plate 7 is inserted into the positioning groove 11 at the corresponding position. At this time, the friction plate 10 on the outer surface of the positioning block 9 cooperates with the inner wall of the positioning groove 11, so that the friction between the two is used to fix the adjusting slider 5. After the installation is completed, the elastic component 12 between the two connecting heads 1 provides a certain pulling force (the outer protective cover 13 is used to protect the elastic component 12) to achieve the purpose of dynamic stabilization of the spine. When the device needs to be installed on the left and right sides of the spine, the devices on the left and right sides are connected through the connecting plate 21, and the mounting screws 22 at the left and right ends of the connecting plate 21 are screwed into the mounting hole 23 opened above the connecting head 1 for fixation.

[0025] Example 2: Please refer to Figure 3-Figure 5 In order to solve the problem that traditional devices are damaged due to force during use, this embodiment provides the following technical solution, which uses a buffer mechanism to buffer the movement of the device, and specifically discloses: a mounting ball head 14 for rotatably connecting to the connecting head 1 is fixedly installed on the top of the mounting block 2, and a movable groove 15 for the movement of the mounting block 2 is opened on the side of the connecting head 1, and a buffer mechanism for buffering the movement of the mounting block 2 is provided on the inner side of the movable groove 15, and the buffer mechanism includes a first connecting rod 16 rotatably installed on the outer surface of the mounting block 2, and a second connecting rod 17 is rotatably installed on the upper end of the first connecting rod 16, and the front end of the second connecting rod 17 is inserted into the interior of the connecting head 1, a piston plate 19 is fixedly installed on the top of the second connecting rod 17, and a sealed sliding structure is formed between the piston plate 19 and a damping chamber 20 opened in the interior of the connecting head 1, the piston plate 19 squeezes the air inside the damping chamber 20 to form a buffering effect, and a buffer spring 18 for releasing force is installed on the outside of the second connecting rod 17.

[0026] When the patient moves, the spine drives the corresponding limit column 3 to move. At this time, the mounting block 2 connected to the limit column 3 rotates in the movable groove 15 using the mounting ball head 14. During the rotation, the mounting block 2 drives the first connecting rod 16 to move, so that the first connecting rod 16 drives the second connecting rod 17 to extend and retract relative to the connecting head 1. At this time, the second connecting rod 17 drives the piston plate 19 to slide inside the damping chamber 20 opened inside the connecting head 1, so that the piston plate 19 squeezes the air inside the damping chamber 20 to achieve a damping effect, and at the same time cooperates with the buffer spring 18 outside the second connecting rod 17 to achieve an effective buffering purpose, thereby avoiding damage to the device due to stress when the spine moves.

[0027] Example 3: Please refer to Figure 9-10 In order to achieve the purpose of adaptive replacement, this embodiment provides the following technical solutions, which specifically disclose: a disassembly and installation mechanism for replacing the limit column 3 is provided between the limit column 3 and the mounting block 2, and the disassembly and installation mechanism includes a docking screw 24 fixedly installed on the end face of the limit column 3, and the docking screw 24 is threadedly connected to the docking hole 25 opened on the end face of the mounting block 2, and a snap-fit ​​groove 26 is opened at the edge of the end face of the mounting block 2, and the snap-fit ​​groove 26 and the snap-fit ​​ball 27 correspond to and engage with each other, and the snap-fit ​​ball 27 is fixedly installed on the end face of the limit column 3.

[0028] When facing different usage situations, twist the limit column 3 to remove the limit column 3, then replace it with a suitable limit column 3, and then use the threaded connection between the docking screw 24 and the docking hole 25 to fix the new limit column 3. When fixing, the engaging ball 27 and the engaging groove 26 engage with each other, thereby avoiding misalignment of the limit column 3 during installation.

[0029] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dynamic stabilization structure for spinal surgery, comprising a connector (1) for connecting a device body, a mounting block (2) being mounted on the side of the connector (1), and a limiting column (3) in a strip-shaped structure being mounted on the end face of the mounting block (2), characterized in that: Also includes: The connector (1) is configured as a two-piece spliced ​​structure, and an elastic component (12) in the form of a spring is fixedly installed between the two connectors (1), and a protective cover (13) fixedly connected to the connector (1) is provided on the outside of the elastic component (12), and the protective cover (13) is configured as a silicone material that can be implanted in the human body; An adjusting slot (4) is provided in the interior of the limiting column (3) and passes through the adjusting slot (4), and an adjusting slider (5) is slidably installed in the interior of the adjusting slider (4), and a pedicle screw (6) is installed in the interior of the adjusting slider (5), and the pedicle screw (6) is drilled into the human spine. A positioning mechanism for fixing the adjusting slider (5) to the limiting column (3) is provided above the adjusting slider (5); A mounting ball head (14) for rotatably connecting to the connector (1) is fixedly mounted on the top of the mounting block (2), and a movable groove (15) for allowing the mounting block (2) to move is provided on the side of the connector (1), and a buffer mechanism for buffering the movement of the mounting block (2) is provided inside the movable groove (15); A disassembly and installation mechanism for replacing the limiting column (3) is provided between the limiting column (3) and the installation block (2).

2. A dynamic stabilization structure for spinal surgery according to claim 1, characterized in that: The positioning mechanism comprises an extrusion plate (7) mounted above the adjusting slider (5), the pedicle screw (6) penetrates into the extrusion plate (7), and a return spring (8) is fixedly mounted between the lower surface of the extrusion plate (7) and the upper surface of the adjusting slider (5).

3. A dynamic stabilization structure for spinal surgery according to claim 2, characterized in that: Positioning blocks (9) are fixedly mounted on the lower surfaces of the left and right ends of the extrusion plate (7), and friction plates (10) are fixedly mounted on the outer surfaces of the positioning blocks (9), and the outer surfaces of the friction plates (10) are made of a frosted material.

4. A dynamic stabilization structure for spinal surgery according to claim 3, characterized in that: The position of the positioning block (9) corresponds to the position between the positioning grooves (11) provided on the upper surface of the limiting column (3) in the vertical direction, and the inner wall of the positioning groove (11) is also set to be frosted material, and the length of the positioning groove (11) is the same as the position length of the adjustment slide groove (4).

5. The dynamic stabilization structure for spinal surgery according to claim 1, characterized in that: The buffer mechanism comprises a first connecting rod (16) rotatably mounted on the outer surface of the mounting block (2), a second connecting rod (17) rotatably mounted on the upper end of the first connecting rod (16), and a front end of the second connecting rod (17) is inserted into the interior of the connector (1).

6. The dynamic stabilization structure for spinal surgery according to claim 5, characterized in that: A piston plate (19) is fixedly mounted on the top end of the second connecting rod (17), and a sealed sliding structure is formed between the piston plate (19) and a damping chamber (20) provided inside the connector (1).

7. The dynamic stabilization structure for spinal surgery according to claim 6, characterized in that: The piston plate (19) squeezes the air inside the damping chamber (20) to form a buffering effect, and a buffer spring (18) for releasing force is installed outside the second connecting rod (17).

8. The dynamic stabilization structure for spinal surgery according to claim 1, characterized in that: The disassembly and installation mechanism comprises a docking screw (24) fixedly mounted on the end face of the limiting column (3), and the docking screw (24) is threadedly connected to a docking hole (25) provided on the end face of the installation block (2).

9. The dynamic stabilization structure for spinal surgery according to claim 8, characterized in that: A snap-fit ​​groove (26) is provided at the edge of the end face of the mounting block (2), and the snap-fit ​​groove (26) and the snap-fit ​​ball (27) correspond to and snap-fit ​​with each other, and the snap-fit ​​ball (27) is fixedly mounted on the end face of the limiting column (3).

10. The dynamic stabilization structure for spinal surgery according to claim 1, characterized in that: A connecting plate (21) with an arched structure is provided above the two corresponding connecting heads (1), and mounting screws (22) are rotatably installed through the left and right ends of the connecting plate (21), and the mounting screws (22) are threadedly installed between the mounting holes (23) opened on the upper surface of the connecting head (1).

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