A spinal surgery assembly

Abstract

The utility model discloses an embodiment provides a kind of vertebral surgery assembly, comprising: drilling module, including drilling machine and the drill head assembly of being installed on the drilling machine, the drilling machine drives the drill head assembly and sets up rectangular through-hole on vertebra when operating;Square hole pliers, including two hinge handles and being set on two the clamping assembly of handle, limiting component, the clamping assembly can pass through the rectangular through-hole, the limiting component can limit the relative motion range of two handle, the square hole pliers are fixed by the clamping assembly, limiting component clamping and fixing vertebra, and limiting in the position of vertebra being fixed more tightly.The vertebral surgery assembly provided by the utility model is convenient to operate, can reduce the risk and complication of operation, improve the efficiency and effect of operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a vertebral surgical component. Background Technology

[0002] In the development of modern medicine, thoracic spinal stenosis has gradually become one of the diseases that have received much attention. Thoracic spinal stenosis is a disease caused by various lesions within the thoracic spinal canal, leading to a reduction in the effective volume of the spinal canal, which in turn compresses the spinal cord or nerve roots, causing a series of clinical symptoms. Its causes are diverse, including thoracic intervertebral disc herniation, thickening and calcification of the ligamentum flavum, ossification of the posterior longitudinal ligament, and osteophyte formation on the posterior margin of the thoracic vertebral body.

[0003] With the increasing aging of the population and changes in lifestyle, the incidence of thoracic spinal stenosis is on the rise. Patients often experience lower limb weakness, numbness, unsteady gait, and bowel and bladder dysfunction, severely impacting their quality of life. For patients with severe symptoms who do not respond to conservative treatment, thoracic posterior wall resection and spinal canal decompression become an important treatment option.

[0004] Thoracic posterior wall resection for spinal canal decompression is a complex and delicate surgical procedure aimed at removing diseased tissue compressing the spinal cord, expanding the spinal canal volume, and restoring normal spinal cord function. Precise and safe lamina traction is crucial during the procedure. However, current lamina traction tools face numerous challenges in practical application.

[0005] In traditional surgical procedures, towel clamps are often used for manipulation with one hand. However, these towel clamps have significant drawbacks. Due to their design limitations, they cannot provide sufficient grip stability when operated with one hand. During surgery, surgeons need to perform delicate operations within a limited and complex surgical area, and factors such as slippage of the spinous process of the vertebral laminae, fatigue, or external interference can easily cause the towel clamps to slip out of their hands.

[0006] Furthermore, the structure and function of towel forceps are not well adapted to the various needs of surgery. When lifting the lamina, they cannot provide a uniform and stable force distribution, thus affecting the stability and accuracy of the operation.

[0007] Unstable procedures can cause unnecessary damage to surrounding tissues, increasing surgical risks and the likelihood of complications. For patients, this can mean longer recovery times, more pain, and potential health risks.

[0008] At the same time, due to the shortage of towel clamps, doctors need to spend more effort and time controlling the tools during surgery, which not only increases the difficulty of the operation but may also affect the efficiency and effectiveness of the surgery. Utility Model Content

[0009] This invention provides a vertebral surgical component that is easy to operate, reduces surgical risks and complications, and improves surgical efficiency and effectiveness.

[0010] To address the aforementioned technical problems, this utility model provides a vertebral surgery component, comprising:

[0011] A drilling module includes a drilling machine and a drill bit assembly mounted on the drilling machine. When the drilling machine is running, it drives the drill bit assembly to open a rectangular through hole in the vertebra.

[0012] A square-hole pliers includes two hinged handles and a clamping component and a limiting component disposed on the two handles. The clamping component can pass through the rectangular through hole, and the limiting component can limit the relative range of motion of the two handles. The square-hole pliers clamp and fix the vertebrae through the clamping component and the limiting component, and limit the vertebrae to the position where they are clamped and fixed.

[0013] In some embodiments, the drill bit assembly includes a cutter head and a cutter shaft connected to the cutter head for driving the cutter head to rotate eccentrically, and the drilling machine is connected to the cutter shaft.

[0014] In some embodiments, the blade has a plurality of protrusions, each of which has a cutting edge formed thereon.

[0015] In some embodiments, each of the protrusions has the same structure, including three arc surfaces that enclose the protrusion into a block shape, wherein a first side of the block shape is positioned higher than a second side, and at least the first side forms the blade.

[0016] In some embodiments, the protrusion includes a first arc surface, a second arc surface, and a third arc surface. The first arc surface and the second arc surface are disposed opposite each other and the recess faces outward. The third arc surface is connected to the first arc surface and the second arc surface respectively and the recess faces inward. The side of the third arc surface connected to the first arc surface forms a first side surface, and the side of the third arc surface connected to the second arc surface forms a second side surface.

[0017] In some embodiments, the first arc surface and the second arc surface between two adjacent protrusions are connected so that the plurality of protrusions are arranged in a ratchet-like manner in a clockwise direction.

[0018] In some embodiments, the first and second surfaces of the cutting head are both planar, the cutting head extends outward in a circumferential direction to form three protrusions, and the cutting shaft passes through the non-center of the cutting head from the first surface.

[0019] In some embodiments, the drill assembly includes a drill bit, a drive shaft, and an input shaft connected in sequence. The input shaft is used to connect to a drilling machine. The drill bit, drive shaft, and input shaft are connected in a cooperative manner to form a rod. The drill assembly also includes a constraint member for constraining the movement trajectory of the drill bit to drill out a square hole. The rod passes through the constraint member and is capable of being positioned relative to the constraint member.

[0020] In some embodiments, the drill bit is rod-shaped, the drive shaft is a universal joint, and the constraint member is L-shaped, including a horizontal first plate and a vertical second plate. The first plate has a square hole, and the rod passes through the square hole. The second plate is recessed on one side facing the rod to provide space for the movement of the rod.

[0021] In some embodiments, the two clamp handles are cross-hinged, the first ends of the two clamp handles facing the same direction are fitted with the clamping assembly, and the second ends of the two clamp handles are fitted with the limiting assembly.

[0022] In some embodiments, the clamping assembly includes two clamping discs respectively mounted on the first end of the clamp handle, and a positioning post disposed on one of the clamping discs, the positioning post being matched with the shape of a rectangular through hole so as to pass through the rectangular through hole and abut against the corresponding clamping disc.

[0023] In some embodiments, the limiting component includes an arc-shaped slide rail and an arc-shaped limiting member. One end of the arc-shaped slide rail and the arc-shaped limiting member are respectively connected to the two clamp handles, and the other end of the arc-shaped limiting member is located inside the arc-shaped slide rail and can move along the arc-shaped slide rail when the two clamp handles rotate relative to each other.

[0024] The other end of the arc-shaped limiting member is also provided with a fastener, which can fix the arc-shaped limiting member on the arc-shaped slide rail to lock the current relative position of the arc-shaped limiting member and the arc-shaped slide rail.

[0025] Based on the disclosure of the above embodiments, it can be understood that the beneficial effects of this utility model include: by setting a drilling module capable of opening rectangular through holes and a square-hole clamp capable of clamping the vertebrae through the rectangular through holes, it can ensure that when medical personnel use the vertebral surgical components with one hand to perform surgical operations, the instruments can firmly clamp the lamina, making it less likely to slip out of the hand. This provides a stable and reliable lifting action for the surgery, allowing medical personnel to more precisely control the lifting force and angle to adapt to different patients' thoracic spine structures and lesions, achieving precise spinal canal decompression, simplifying the operation steps, reducing the risk of accidental damage to surrounding nerves, blood vessels, and tissues due to instrument instability or inaccurate operation, improving surgical safety, reducing time wasted due to inconvenient instrument operation, accelerating the surgical process, and shortening the patient's surgical time and anesthesia exposure risk. At the same time, the overall structure of the surgical instruments in this embodiment is compact and flexible, facilitating operation within the limited space of minimally invasive surgery, promoting the development of thoracic posterior wall resection spinal canal decompression surgery towards minimally invasive surgery. In addition, by using materials and structures that are easy to clean, disinfect, and maintain, it can also help ensure the hygiene and service life of the instruments, reducing medical costs.

[0026] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0027] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the vertebral surgical component in an embodiment of the present invention.

[0030] Figure 2 This is a diagram showing the application state of the drilling module in the vertebral surgery assembly of this utility model embodiment.

[0031] Figure 3 This is a schematic diagram of the drill assembly in a vertebral surgery component according to another embodiment of the present invention.

[0032] Figure 4This is a partial cross-sectional angle diagram of the drill assembly in a vertebral surgery component according to another embodiment of the present invention.

[0033] Figure 5 This is a diagram showing the application state of the square hole forceps in the vertebral surgery component of this utility model embodiment.

[0034] Figure label:

[0035] 1-Drill bit assembly; 2-Square hole pliers; 3-Pliers handle; 4-Cutter head; 5-Cutter shaft; 6-Protrusion; 7-Cutting edge; 8-First arc surface; 9-Second arc surface; 10-Third arc surface; 11-Clamping disc; 12-Positioning pin; 13-Arc-shaped slide rail; 14-Arc-shaped limiting component; 15-Drill bit; 16-Drive shaft; 17-Input shaft; 18-Constraint component. Detailed Implementation

[0036] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but these are not intended to limit the scope of the present invention.

[0037] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the following description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope of this disclosure will be apparent to those skilled in the art.

[0038] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present disclosure and, together with the general description of the disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

[0039] These and other features of the present invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0040] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the present invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0041] The above and other aspects, features and advantages of this disclosure will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0042] Specific embodiments of the present disclosure are described thereafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present disclosure and can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the present disclosure. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of substantially any suitable detailed structures.

[0043] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in still another embodiment,” all of which may refer to one or more of the same or different embodiments according to this disclosure.

[0044] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0045] like Figure 1 As shown, this utility model embodiment provides a vertebral surgery component, including:

[0046] A drilling module includes a drilling machine and a drill bit assembly 1 mounted on the drilling machine. When the drilling machine is running, it drives the drill bit assembly 1 to open a rectangular through hole in the vertebra.

[0047] The square-hole pliers 2 includes two hinged pliers 3 and a clamping component and a limiting component disposed on the two pliers 3. The clamping component can pass through the rectangular through hole, and the limiting component can limit the relative movement range of the two pliers 3. The square-hole pliers 2 clamps and fixes the vertebrae through the clamping component and the limiting component, and limits them to the position where the vertebrae are clamped and fixed.

[0048] The rectangular hole in this embodiment can also be set as other irregular holes. When it is a different irregular hole, you only need to use a matching drill bit assembly.

[0049] The vertebral surgical component can be applied to different types of vertebral surgeries, such as thoracic posterior wall resection and spinal canal decompression surgery, as well as surgeries for patients with different thoracic vertebral structures and complex lesions. This embodiment uses thoracic posterior wall resection and spinal canal decompression surgery as an example to illustrate the vertebral surgical component. The vertebral surgical component in this embodiment includes a drilling module and a square-hole clamp 2. The drilling module is used to create a rectangular through-hole (e.g., a square hole) in the spinous process structure. The square-hole clamp 2 is used by medical personnel to clamp and fix the spinous process through the rectangular through-hole, allowing medical personnel to cut and separate the spinous process. A dissector is used to peel off the tunica luteum attached to the spinous process, completing the entire spinous process removal. The clamping process can be operated with one hand; that is, the square-hole clamp 2 can accurately and firmly clamp and fix the spinous process with one hand, making operation convenient and facilitating subsequent cutting and separation of the spinous process.

[0050] Based on the above, this embodiment, by setting up a drilling module capable of creating rectangular through-holes and a square-hole clamp 2 capable of clamping the vertebrae through the rectangular through-holes, ensures that when medical personnel use the vertebral surgical components with one hand for surgical operations, the instruments can firmly clamp the lamina, preventing slippage. This provides a stable and reliable lifting action for the surgery, allowing medical personnel to more precisely control the lifting force and angle to adapt to different patients' thoracic spine structures and lesions, achieving precise spinal canal decompression, simplifying the operation steps, reducing the risk of accidental damage to surrounding nerves, blood vessels, and tissues due to instrument instability or inaccurate operation, improving surgical safety, reducing time wasted due to inconvenient instrument operation, accelerating the surgical process, and shortening the patient's surgical time and anesthesia exposure risk. Furthermore, the overall structure of the surgical instruments in this embodiment is compact and flexible, facilitating operation within the limited space of minimally invasive surgery, promoting the development of thoracic posterior wall resection spinal canal decompression surgery towards minimally invasive procedures. In addition, by using materials and structures that are easy to clean, disinfect, and maintain, it also helps ensure the hygiene and lifespan of the instruments, reducing medical costs.

[0051] In one embodiment, the drill assembly 1 includes a cutter head 4 and a cutter shaft 5 connected to the cutter head 4 for driving the cutter head 4 to rotate eccentrically. The drilling machine is connected to the cutter shaft 5. The drilling machine may be, but is not limited to, a handheld electric drill. The output shaft of the drilling machine is connected to the cutter shaft 5 to drive the cutter head 4 to rotate eccentrically, thereby creating a rectangular through hole in the spinous process of the vertebra.

[0052] Combination Figure 1As shown, the blade head 4 has multiple protrusions 6, each of which has a cutting edge. Specifically, in this embodiment, each protrusion 6 has the same structure, including three arc surfaces that enclose the protrusion 6 into a block shape. The first side of the block shape is higher than the second side, and at least the first side forms the cutting edge 7. For example, the second side can also form the cutting edge 7.

[0053] In this embodiment, the protrusion 6 includes a first arc surface 8, a second arc surface 9, and a third arc surface 10. The first arc surface 8 and the second arc surface 9 are arranged opposite each other with their recesses facing outwards. The third arc surface 10 is connected to both the first arc surface 8 and the second arc surface 9, with its recess facing inwards. The side of the third arc surface 10 connected to the first arc surface 8 forms a first side, and the side of the third arc surface 10 connected to the second arc surface 9 forms a second side. As described above, both sides can form a cutting edge 7, or only the first side can form a cutting edge 7. The first arc surface 8 and the second arc surface 9 are connected between adjacent protrusions 6. Since the height of the first side of each protrusion 6 is higher than the second side, the multiple protrusions 6 present a gear-like shape in the circumferential direction of the cutter head 4. That is, the arrangement of the multiple protrusions 6 matches the clockwise arrangement of ratchet teeth. The cutter head 4 with this structure has the maximum cutting efficiency advantage for drilling rectangular through holes.

[0054] Continue to combine Figure 1 and Figure 2 As shown, in practical applications, the cutter head 4 is formed from a metal plate of a certain thickness. Its first and second surfaces, which are opposite each other, are both planar. The cutter head 4 extends outward in a circumferential direction to form three protrusions 6. The cutter shaft 5 passes through the first surface at a non-central location on the cutter head 4. In this embodiment, the eccentrically rotating cutter shaft 5 serves two purposes: firstly, to compensate for the circular motion of the cutter head 4 during cutting. Under the motion compensation of the eccentric cutter shaft 5, the final cutting trajectory of the cutter head 4 is rectangular, specifically as follows... Figure 3 As shown. The second function is to transmit the circumferential power source of the drilling machine to the rotational motion of the cutter head 4 and to drive the rotational motion of the cutter shaft 5. That is, by setting the cutter shaft 5 eccentrically, and in conjunction with the structure of the cutter head 4, a rectangular through hole can be drilled quickly. When the size of the rectangular through hole needs to be adjusted according to surgical requirements, the transmission ratio between the cutter shaft 5 and the output shaft of the drilling machine can be adjusted to achieve motion compensation matching, making the rotational speed of the cutter head 4 different from the rotational speed of the output shaft, ultimately synthesizing a rectangular trajectory of the specified size.

[0055] In another embodiment, the drill bit assembly also has another possible implementation. For example... Figure 3 and Figure 4As shown, the drill assembly includes a drill bit 15, a drive shaft 16, and an input shaft 17 connected in sequence. The input shaft 17 is used to connect to a drilling machine. The drill bit 15, drive shaft 16, and input shaft 17 are connected to form a rod. The drill assembly also includes a constraint member 18 for constraining the movement trajectory of the drill bit 15 to drill a square hole. The rod passes through the constraint member 18 and is relative to the constraint member 18. That is, when the drilling machine driver drills, the rod formed by the drill bit 15, drive shaft 16, and input shaft 17 is not fixed, but can move within a certain range, so that the drilling trajectory is not a fixed point, but a movement trajectory that matches the square hole to be drilled, thereby ensuring that a square hole can be drilled. In this embodiment, the constraint member 18 is used to constrain the movement trajectory of the rod formed by the drill bit 15, drive shaft 16, and input shaft 17.

[0056] Specifically, continue to combine Figure 3 and Figure 4 As shown, the drill bit 15 is rod-shaped, and the drive shaft 16 is a universal joint with two connecting ends, which are respectively connected to the drill bit 15 and the input shaft 17. The constraint member 18 is L-shaped, including a horizontal first plate and a vertical second plate, which are connected to form an L-shape. The first plate has a through square hole, and the rod formed by the drill bit 15, drive shaft 16, and input shaft 17 passes through the square hole. The second plate is recessed on one side facing the rod to provide space for the rod to move.

[0057] Combination Figure 5 As shown, the two handles 3 of the square-hole pliers 2 are hinged together. The first ends of the two handles 3, which face the same direction, are fitted with the clamping assembly, and the second ends of the two handles 3 are fitted with the limiting assembly. In this embodiment, the clamping assembly is fitted at the head of the two handles 3, and the limiting assembly is fitted at the tail.

[0058] Specifically, the clamping assembly includes two clamping discs 11 respectively mounted on the first end of the clamp handle 3. The clamping discs 11 are used to clamp the spinous processes of the vertebrae. The two clamping discs 11 have a flexible or elastic layer structure on opposite sides for more stable clamping of the spinous processes. One of the clamping discs 11 is provided with a positioning post 12 facing the other clamping disc 11. The positioning post 12 matches the shape of the rectangular through hole, such as being a square post, so that it can pass through the rectangular through hole and abut against the corresponding clamping disc 11.

[0059] For example, in this embodiment, the two clamping discs 11 clamp the ratchet by gripping both sides of the ratchet. The surface of the clamping disc 11 is designed with a flexible protrusion structure to increase the friction during clamping and improve the stability of clamping the ratchet. The size of the clamping disc 11 is variable and can be flexibly changed according to actual needs, thereby meeting the versatility of clamping ratchet of different sizes. One clamping disc 11 is provided with a positioning post 12. When clamping the ratchet, the positioning post 12 can pass through a rectangular through hole and abut against the other clamping disc 11. In order to better limit the positioning post 12, a fixing hole can be opened on the clamping disc 11. The positioning post 12 is inserted into the fixing hole to improve the clamping degree of the ratchet by the two clamping discs 11. This setting can not only effectively avoid the problem of the ratchet rotating in the jaws when clamping the ratchet, but also meet the clamping force requirements of clamping the ratchet, and make up for the problem of unstable clamping and slippage when the clamping force is large in the existing clamping structure.

[0060] like Figure 1 As shown, the limiting component includes an arc-shaped slide rail 12 and an arc-shaped limiting member 13. One end of the arc-shaped slide rail 12 and the arc-shaped limiting member 13 are respectively connected to the two clamp handles 3. The other end of the arc-shaped limiting member 13 is located inside the arc-shaped slide rail 12 and can move along the arc-shaped slide rail 12 when the two clamp handles 3 rotate relative to each other. The other end of the arc-shaped limiting member 13 is also provided with a fastener, which can fix the arc-shaped limiting member 13 on the arc-shaped slide rail 12 to lock the current relative position of the arc-shaped limiting member 13 and the arc-shaped slide rail 12.

[0061] For example, the arc-shaped slide rail 12 is composed of a strip with an arc-shaped elongated hole, and the arc-shaped limiting member 13 is formed by an arc-shaped strip and a screw screwed to one end of the arc-shaped strip. The screw is located in the arc-shaped elongated hole of the arc-shaped slide rail 12 and can move along it. The screw is provided with a nut for forming a fastener. Because the clamping angle of the forceps handles 3 differs when clamping different spinous processes, after the two forceps handles 3 clamp the spinous processes, medical personnel can tighten the nuts to fix the screw to the arc-shaped elongated hole, thereby locking the current clamping angle between the two forceps handles 3. This prevents the two forceps handles 3 from rotating relative to each other and keeps them in the position of clamping the spinous processes. This allows medical personnel to operate without having to squeeze the forceps for a long time during surgery, releasing the clamping force on the forceps and enabling one-handed operation. This allows medical personnel to respond more flexibly to various situations during surgery, using the freed-up other hand for other auxiliary operations, improving surgical efficiency, including focusing on completing the extraction of the spinous processes and the dissection of the spinous processes and tunica luteum, reducing accidental damage to surrounding important tissues (such as nerves and blood vessels), reducing the risk of surgical complications, and more effectively achieving spinal canal decompression by precisely lifting the vertebrae, improving patient symptoms, and increasing the success rate of treatment.

[0062] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this utility model.

Claims

1. A vertebral surgical component, characterized in that, include: A drilling module includes a drilling machine and a drill bit assembly mounted on the drilling machine. When the drilling machine is running, it drives the drill bit assembly to open a rectangular through hole in the vertebra. A square-hole pliers includes two hinged handles and a clamping component and a limiting component disposed on the two handles. The clamping component can pass through the rectangular through hole, and the limiting component can limit the relative range of motion of the two handles. The square-hole pliers clamp and fix the vertebrae through the clamping component and the limiting component, and limit the vertebrae to the position where they are clamped and fixed.

2. The vertebral surgical assembly according to claim 1, characterized in that, The drill bit assembly includes a cutter head and a cutter shaft connected to the cutter head for driving the cutter head to rotate eccentrically. The drilling machine is connected to the cutter shaft. The cutter head has multiple protrusions, and each protrusion has a cutting edge.

3. The vertebral surgical assembly according to claim 2, characterized in that, Each of the protrusions has the same structure, including three arc surfaces. The three arc surfaces enclose the protrusion into a block shape. The first side of the block shape is higher than the second side, and at least the first side forms the blade.

4. The vertebral surgical assembly according to claim 3, characterized in that, The protrusion includes a first arc surface, a second arc surface, and a third arc surface. The first arc surface and the second arc surface are arranged opposite each other and the recess faces outward. The third arc surface is connected to the first arc surface and the second arc surface respectively and the recess faces inward. The side of the third arc surface connected to the first arc surface forms a first side surface, and the side of the third arc surface connected to the second arc surface forms a second side surface.

5. The vertebral surgical assembly according to claim 4, characterized in that, The first and second arc surfaces between two adjacent protrusions are connected so that the protrusions are arranged in a clockwise ratchet pattern; the first and second surfaces of the cutter head are both planar, and the cutter head extends outward in the circumferential direction to form three protrusions; the cutter shaft passes through the non-center of the cutter head from the first surface.

6. The vertebral surgical assembly according to claim 1, characterized in that, The drill bit assembly includes a drill bit, a drive shaft, and an input shaft connected in sequence. The input shaft is used to connect to a drilling machine. The drill bit, drive shaft, and input shaft are connected to form a rod. The drill bit assembly also includes a constraint member for constraining the movement trajectory of the drill bit to drill a square hole. The rod passes through the constraint member and is able to move relative to the constraint member.

7. The vertebral surgical assembly according to claim 6, characterized in that, The drill bit is rod-shaped, the drive shaft is a universal joint, and the constraint member is L-shaped, including a horizontal first plate and a vertical second plate. The first plate has a square hole, and the rod passes through the square hole. The second plate is recessed on one side facing the rod to provide space for the movement of the rod.

8. The vertebral surgical assembly according to claim 1, characterized in that, The two clamp handles are cross-hinged, and the first ends of the two clamp handles facing the same direction are fitted with the clamping assembly, and the second ends of the two clamp handles are fitted with the limiting assembly.

9. The vertebral surgical assembly according to claim 1, characterized in that, The clamping assembly includes two clamping discs respectively mounted on the first end of the clamp handle, and a positioning post disposed on one of the clamping discs. The positioning post is matched with the shape of a rectangular through hole so that it can pass through the rectangular through hole and abut against the corresponding clamping disc.

10. The vertebral surgical assembly according to claim 1, characterized in that, The limiting component includes an arc-shaped slide rail and an arc-shaped limiting member. One end of the arc-shaped slide rail and the arc-shaped limiting member are respectively connected to the two clamp handles. The other end of the arc-shaped limiting member is located inside the arc-shaped slide rail and can move along the arc-shaped slide rail when the two clamp handles rotate relative to each other. The other end of the arc-shaped limiting member is also provided with a fastener, which can fix the arc-shaped limiting member on the arc-shaped slide rail to lock the current relative position of the arc-shaped limiting member and the arc-shaped slide rail.

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