A cervical spine anterior approach screw guide

Abstract

The application relates to the field of medical devices, in particular to a cervical vertebra anterior path screw placement guide, which comprises a guide cylinder, one end of which is used for being embedded into a head embedding groove on an implant main body to guide the installation of a fixing screw, and the other end of which is provided with a holding part; a support body is used for supporting and guiding one end of the guide cylinder close to the holding part to adjust the placement angle of the guide cylinder; the support body comprises a support rod, a fixing part arranged at one end of the support rod and used for being connected with the implant main body, and an adjusting part arranged at the other end of the support rod and used for being connected with the guide cylinder; the adjusting part is connected with one end of the guide cylinder close to the holding part and is used for adjusting the position of one end of the guide cylinder close to the holding part in two-dimensional directions. The application has the effect that the installation angle of the fixing screw can be ensured to be correct, the installation of the implant is facilitated, and the firmness of the implant is ensured.

Description

Technical Field

[0001] This application relates to the field of medical devices, and in particular to anterior cervical spine screw placement guide. Background Technology

[0002] Mid-cervical vertebral body resection and fusion, also known as subtotal cervical vertebral body resection, was first used in the clinical practice of Bailey-Badgley in the 1960s to treat cervical spine diseases, mainly comminuted fractures of the cervical spine, so that the cervical spine can be fixed after bone grafting to prevent cervical spine deformation.

[0003] Currently, subtotal cervical corpectomy mainly includes the following steps: 1. Making an incision in the anterior aspect of the neck to expose the vertebral body and intervertebral disc; 2. Using a dispersing forceps to open the vertebral body and remove the intervertebral disc; 3. Using an ultrasonic osteotome to remove the diseased portion of the vertebral body; 4. Implanting a titanium mesh filled with bone fragments into the removed area of ​​the vertebral body; 5. Fixing a plate to the anterior aspect of the vertebral body on both sides above and below the diseased vertebra with screws to prevent the titanium mesh from dislodging from the intervertebral space; 6. Suturing the surgical incision. This method can treat cervical spondylosis, but because the plate is fixed to the anterior aspect of the vertebral body, there will inevitably be a large number of protruding parts outside the vertebral body, which can cause postoperative symptoms such as nerve irritation.

[0004] To reduce postoperative symptoms such as nerve irritation caused by plate protrusion, an integrated anterior cervical spine implant has been developed. However, when using this integrated anterior cervical spine implant, ensuring the correct installation angle of the fixing screws that fix the implant body to the pedicle of the human body, and improving the convenience of fixing the implant to ensure its firmness are problems that need to be solved. Summary of the Invention

[0005] In order to ensure the correct installation angle of the fixing screws for easy installation and to improve the convenience of fixing implants and ensure the firmness of implant fixation, this application provides an anterior cervical screw placement guide.

[0006] The cervical anterior cervical screw placement guide provided in this application adopts the following technical solution:

[0007] A cervical anterior cervical screw placement guide includes:

[0008] The guide tube has one end for embedding into the head groove on the implant body to guide the installation of the fixing screws, and the other end is provided with a gripping part.

[0009] A support body is used to support and guide the end of the guide tube close to the holding part to adjust the placement angle of the guide tube; the support body comprises a support rod, a fixing part arranged at one end of the support rod for connecting with the implant body, and an adjusting part arranged at the other end of the support rod for connecting with the guide tube, the adjusting part is connected with the end of the guide tube close to the holding part for adjusting the position of the end of the guide tube close to the holding part in two-dimensional direction.

[0010] By using the above technical scheme, during use, the guide tube is directly connected to the adjusting part of the support body, the fixing part of the support body is connected to the implant body, and the end of the guide tube away from the holding part is inserted into the head slot on the implant body, then the end of the guide tube close to the holding part is adjusted by the adjusting part to adjust the placement angle of the guide tube, so that the placement angle of the guide tube is consistent with the required installation angle of the fixing screw to be installed, finally the fixing screw is directly inserted from the guide tube and inserted from the rod part through hole of the implant body and screwed on the human pedicle, so that the installation and fixation of the fixing screw are completed, and the fixation of the implant is realized. During the installation and fixation of the fixing screw, the guide tube always guides the fixing screw, so that the installation angle of the fixing screw is correct, and the fixation firmness of the implant is ensured.

[0011] Optionally, the adjusting part comprises a first adjusting plate fixed at one end of the support rod, a second adjusting plate slidingly connected to the first adjusting plate, and a fixing plate fixed to the guide tube and slidingly matched with the second adjusting plate, the second adjusting plate drives the fixing plate to slide along the length direction of the first adjusting plate, and the fixing plate slides on the second adjusting plate along the width direction of the first adjusting plate.

[0012] By using the above technical scheme, the position of the guide tube in the width direction of the first adjusting plate is adjusted by sliding the fixing plate on the second adjusting plate; the guide tube is driven to slide along the length direction of the first adjusting plate by sliding the second adjusting plate on the first adjusting plate, so that two-dimensional adjustment of the guide tube is realized.

[0013] Optionally, the second adjusting plate is fixed with a mounting strip on opposite sides, and the opposite sides of the two mounting strips are provided with a sliding groove for embedding the first adjusting plate, and the sliding groove is located on one side of the second adjusting plate.

[0014] By using the above technical scheme, the connection of the first adjusting plate and the second adjusting plate is realized by embedding the opposite sides of the first adjusting plate into the sliding grooves of the two mounting strips, and the second adjusting plate can be slid relative to the first adjusting plate, so that the operation is more convenient.

[0015] Optionally, the first adjusting plate and the second adjusting plate are arc-shaped plates, and the sliding groove is an arc-shaped groove, and the arc center of the sliding groove is arranged in a staggered manner with the arc center of the first adjusting plate.

[0016] By adopting the above technical scheme, when the first adjusting plate is embedded in the sliding groove, the first adjusting plate is installed very firmly in the sliding groove, and the first adjusting plate and the second adjusting plate will not slide relative to each other under the action of gravity.

[0017] Optionally, a plurality of first scale grooves are formed in the first adjusting plate along the length direction of the first adjusting plate, and the end portion of the mounting strip can be embedded in the first scale groove.

[0018] By adopting the above technical scheme, when the second adjusting plate slides relative to the first adjusting plate so that the end portion of the mounting strip is located at the first scale groove, the end portion of the mounting strip can be embedded in the first scale groove to fix the relative position of the first adjusting plate and the second adjusting plate.

[0019] Optionally, a sliding hole for embedding the guide cylinder is formed in the second adjusting plate, the sliding hole is in a strip shape, and a fixing member for fixing the position of the fixing plate on the second adjusting plate is arranged between the fixing plate and the second adjusting plate.

[0020] By adopting the above technical scheme, the position of the fixing plate on the second adjusting plate can be fixed by the fixing member, and the guide cylinder can slide relative to the second adjusting plate by sliding the guide cylinder in the sliding hole, so that the angle of the guide cylinder is adjusted.

[0021] Optionally, the fixing member includes a limiting column fixed to the side of the fixing plate facing the second adjusting plate, and the limiting column is in clamping cooperation with the sliding hole.

[0022] By adopting the above technical scheme, the position of the guide cylinder on the second adjusting plate can be fixed by the clamping cooperation of the limiting column and the sliding hole.

[0023] Optionally, a plurality of limiting columns are arranged, and two limiting columns are a group, and when the limiting column is embedded in the sliding hole, the two limiting columns in the same group abut against the two inner walls of the sliding hole opposite to each other.

[0024] By adopting the above technical scheme, the position of the limiting column in the sliding hole can be fixed by the abutment of the two limiting columns in the same group against the two side walls of the sliding hole opposite to each other.

[0025] Optionally, the fixing portion includes a fixing frame fixed to the end portion of the support rod and a plurality of fixing columns fixed to the side of the fixing frame away from the support rod, and two fixing columns are a group, and a fixing space for embedding the side wall of the implant body is formed between the two fixing columns in the same group.

[0026] By adopting the technical scheme, the implant body can be clamped by clamping the two fixing columns of the same group on both sides of the sidewall of the implant body, so that the implant body is clamped, and the position of the fixing part on the implant body is fixed.

[0027] Optionally, the holding part comprises a handle fixed to the end of the guide cylinder.

[0028] By adopting the technical scheme, the position of the guide cylinder can be fixed by holding the handle by the staff, and the cervical spine anterior approach screw guide is convenient to fix.

[0029] In summary, the present application has at least one of the following beneficial technical effects:

[0030] 1. The present application can guide the fixing screw to be installed by setting the guide cylinder, the position of the guide cylinder can be fixed by the supporting body, and the placement angle of the guide cylinder can be adjusted as needed, and the operation is more convenient;

[0031] 2. The curvature of the sliding groove is different from the sliding of the first adjusting plate, so that when the first adjusting plate is embedded in the sliding groove, the position of the first adjusting plate in the sliding groove can be fixed, the fixing between the first adjusting plate and the second adjusting plate is more firm, and relative sliding of the first adjusting plate and the second adjusting plate under external force is avoided; when the second adjusting plate is forced, the first adjusting plate and the second adjusting plate can be relatively slid to adjust the angle of the guide cylinder;

[0032] 3. The setting of the limiting column can fix the relative position of the fixing plate and the second adjusting plate, and when the guide cylinder is operated to slide in the sliding hole, the limiting column can also slide in the sliding hole, and the adjustment is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structure schematic diagram for embodying an integrated cervical spine anterior approach implant.

[0034] Figure 2 is a structure schematic diagram for embodying a cervical spine anterior approach screw guide in use state.

[0035] Figure 3 is a whole structure schematic diagram of the present application.

[0036] Reference signs: 1, implant body; 11, rod hole; 12, bone cement chamber; 13, head slot; 14, overflow hole; 2, fixing screw; 3, guide cylinder; 31, holding part; 4, support body; 41, support rod; 42, fixed part; 421, fixed frame; 422, fixed column; 423, fixed space; 43, adjusting part; 431, first adjusting plate; 4311, first scale groove; 432, second adjusting plate; 4321, sliding hole; 4322, second scale groove; 433, fixed plate; 434, mounting strip; 4341, sliding groove; 44, fixing piece; 441, limiting column. DETAILED DESCRIPTION

[0037] The following will be described in detail with reference to the accompanying drawings. Figures 1-3 Further detailed description will be made to the present application.

[0038] Reference will be made to the accompanying drawings. Figure 1 The present application discloses an integrated cervical spine anterior implant for reducing the problem of postoperative symptoms such as nerve irritation caused by postoperative steel plate protrusion. The integrated cervical spine anterior implant includes an implant body 1 and a fixing screw 2 capable of being screwed on the human vertebral pedicle. A rod hole 11 is formed on the implant body 1 for the fixing screw 2 to pass through. A bone cement chamber 12 is also formed on one side of the implant body 1 for placing bone cement. The rod hole 11 is connected to the bottom of the bone cement chamber 12. Two rod holes 11 are formed on the implant body 1, and the ends of the two rod holes 11 away from the bone cement chamber 12 are connected to the opposite sides of the implant body 1. A head slot 13 is also formed at the bottom of the bone cement chamber 12 for the head end of the fixing screw 2 to be embedded.

[0039] During the operation, the implant body 1 is directly placed at the site of the resected vertebral body, and the fixing screw 2 is inserted into the rod hole 11 from the bone cement chamber 12, so that the head end of the fixing screw 2 is embedded in the head slot 13, and the tail end of the fixing screw 2 will pass out from the opposite sides of the implant body 1 and be screwed on the human vertebral pedicle, thereby completing the implantation of the implant. Since the implant body 1 is directly fixed on the human vertebral pedicle through the fixing screw 2, it is not necessary to fix a steel plate on the front side of the vertebral body, thereby reducing the occupied area of the steel plate protrusion and reducing the interference with the human nerves.

[0040] However, during the operation, how to ensure the installation angle of the fixing screw 2 and reduce the probability of inclination during the installation of the fixing screw 2 to ensure the firmness of the implant is a problem to be solved.

[0041] The present application discloses a cervical spine anterior implant guide. Referring to Figure 2 , the cervical spine anterior implant guide includes a guide cylinder 3 for guiding the fixing screw 2 and a support body 4 for supporting and fixing the guide cylinder 3.

[0042] One end of the guide cylinder 3 is embedded into the head embedding slot 13 on the implant body 1 to guide the insertion of the fixing screw 2 into the rod hole 11 on the implant body 1, and the other end of the guide cylinder 3 is provided with a holding part 31, which is convenient for the staff to hold the guide cylinder 3.

[0043] The support body 4 includes a support rod 41, a fixing part 42 provided at one end of the support rod 41 for connecting with the implant body 1, and an adjusting part 43 provided at the other end of the support rod 41 for connecting with the guide cylinder 3. The fixing part 42 can connect the end of the support rod 41 to the implant body 1 to fix the position of the support body 4 relative to the implant body 1. The adjusting part 43 is connected to the end of the guide cylinder 3 close to the holding part 31, and can adjust the position of the end of the guide cylinder 3 close to the holding part 31 in two-dimensional direction, thereby realizing the adjustment of the placement angle of the guide cylinder 3 to adapt to the needs of different installation angles of the fixing screw 2.

[0044] Referring to Figure 2 and Figure 3 , the adjusting part 43 includes a first adjusting plate 431 fixed at one end of the support rod 41, a second adjusting plate 432 slidingly connected to the first adjusting plate 431, and a fixing plate 433 fixed to the guide cylinder 3 and slidingly connected to the second adjusting plate 432. Among them, the first adjusting plate 431 is arranged at an acute angle with the support rod 41, the second adjusting plate 432 is perpendicular to the length direction of the first adjusting plate 431, the second adjusting plate 432 can slide along the length direction of the first adjusting plate 431 to drive the guide cylinder 3 to slide along the length direction of the first adjusting plate 431, the fixing plate 433 can slide along the length direction of the second adjusting plate 432 to drive the guide cylinder 3 to slide along the length direction of the second adjusting plate 432, thereby realizing the adjustment of the position of the end of the guide cylinder 3 close to the holding part 31 in two-dimensional direction. Since the end of the guide cylinder 3 away from the holding part 31 is embedded into the head embedding slot 13 on the implant body 1, when the position of the end of the guide cylinder 3 close to the holding part 31 changes, the overall angle of the guide cylinder 3 will change, thereby realizing the guidance of different angles during the installation of the fixing screw 2.

[0045] The mounting strip 434 is fixed to the second adjusting plate 432 on both sides, and the thickness of the mounting strip 434 is greater than that of the second adjusting plate 432, so that one side of the mounting strip 434 protrudes from one side of the second adjusting plate 432. A sliding groove 4341 is formed on the opposite side of the two mounting strips 434 for embedding the first adjusting plate 431. The length direction of the sliding groove 4341 is consistent with the width direction of the second adjusting plate 432, and the sliding groove 4341 is located on one side of the second adjusting plate 432. By embedding the opposite sides of the first adjusting plate 431 into the sliding grooves 4341 of the two mounting strips 434, the relative position of the second adjusting plate 432 and the first adjusting plate 431 can be fixed. When the second adjusting plate 432 slides along the length direction of the first adjusting plate 431, the mounting strip 434 also slides relative to the first adjusting plate 431.

[0046] A sliding hole 4321 is formed on the second adjusting plate 432 for the guide cylinder 3 to pass through and slide. The sliding hole 4321 is long strip-shaped, and the length direction of the sliding hole 4321 is consistent with the length direction of the second adjusting plate 432. The fixed plate 433 is slidingly connected in the sliding hole 4321. A fixing piece 44 is arranged between the fixed plate 433 and the second adjusting plate 432 to fix the fixed plate 433 on the second adjusting plate 432.

[0047] Referring to Figure 3 The fixing piece 44 includes a limiting column 441 fixed to one side of the fixed plate 433 facing the second adjusting plate 432. The limiting column 441 is in clamping connection with the sliding hole 4321.

[0048] Specifically, the limiting column 441 can be provided with one, and the diameter of the limiting column 441 is consistent with the width of the sliding hole 4321, so that the position of the fixed plate 433 on the second adjusting plate 432 can be fixed by inserting the limiting column 441 into the sliding hole 4321.

[0049] Of course, the limiting column 441 can also be provided with multiple, and when the limiting column 441 is provided with multiple, two limiting columns 441 are a group, and the two limiting columns 441 in the same group are arranged along the width direction of the second adjusting plate 432. When the limiting column 441 is inserted into the sliding hole 4321, the two limiting columns 441 in the same group abut against the opposite two side walls of the sliding hole 4321, so as to fix the relative position between the fixed plate 433 and the second adjusting plate 432. The limiting column 441 can be provided with one group, or multiple groups can be arranged along the length direction of the sliding hole 4321. The application is described by taking the limiting column 441 provided with two groups as an example.

[0050] Referring to Figure 3, the first adjusting plate 431 and the second adjusting plate 432 are both arc-shaped plates, and the arc centers of the first adjusting plate 431 and the second adjusting plate 432 are located on the side close to the fixed part 42. The sliding groove 4341 is also an arc-shaped groove, and the arc center of the sliding groove 4341 coincides with the arc center of the second adjusting plate 432, and both coincide with the center of the end of the guide cylinder 3 away from the holding part 31, so that when the guide cylinder 3 slides along the circular arc direction of the second adjusting plate 432 and the second adjusting plate 432 rotates relative to the first adjusting plate 431, the fixed plate 433 will rotate along the circular arc, and the relative position between the fixed plate 433 and the second adjusting plate 432 will not change during the rotation, so that the limiting column 441 will not slide out of the sliding hole 4321 due to the change of the angle of the guide cylinder 3.

[0051] In order to avoid the relative rotation of the second adjusting plate 432 relative to the first adjusting plate 431 when the implant body 1 is fixed on the pedicle of the human body by the fixing screw 2 after the fixing screw 2 passes through the guide cylinder 3, which affects the guide angle of the guide cylinder 3. The arc center of the first adjusting plate 431 is arranged in a staggered manner with the arc center of the sliding groove 4341, so that when the second adjusting plate 432 is rotated relative to the first adjusting plate 431 to adjust the guide angle of the guide cylinder 3, the position of the first adjusting plate 431 in the sliding groove 4341 is more fixed due to the staggered arrangement of the arc centers of the first adjusting plate 431 and the sliding groove 4341, and the relative sliding between the first adjusting plate 431 and the second adjusting plate 432 will not be affected by external force.

[0052] Referring to Figure 3 A first scale groove 4311 is also provided on the side of the first adjusting plate 431, and a plurality of first scale grooves 4311 are arranged at intervals along the length direction of the first adjusting plate 431, which facilitates the doctor to intuitively check the position of the second adjusting plate 432 relative to the first adjusting plate 431, so as to obtain the placement angle of the guide cylinder 3. The first scale groove 4311 is located on the side of the first adjusting plate 431 facing the second adjusting plate 432, so that when the position of the second adjusting plate 432 on the first adjusting plate 431 is adjusted, the end of the mounting strip 434 can be embedded in the first scale groove 4311 due to the staggered arrangement of the arc centers of the first adjusting plate 431 and the sliding groove 4341, so that the position between the second adjusting plate 432 and the first adjusting plate 431 is more fixed.

[0053] The first adjusting plate 431 is suspended from the end of the supporting rod 41, so that the end of the first adjusting plate 431 away from the supporting rod 41 forms an elastic end. When it is needed to remove the relative position between the first adjusting plate 431 and the second adjusting plate 432, the end of the first adjusting plate 431 away from the supporting rod 41 is directly bent, so that the end of the mounting strip 434 is separated from the first scale groove 4311, and the second adjusting plate 432 is directly slid on the first adjusting plate 431 by the worker, so that the operation is more convenient.

[0054] Of course, the second scale groove 4322 is also formed on the second adjusting plate 432, and the second scale groove 4322 is located on both sides of the sliding hole 4321 and is spaced apart along the length direction of the sliding hole 4321, so as to facilitate the doctor to intuitively check the position of the guide cylinder 3 on the second adjusting plate 432, and then the placement angle of the guide cylinder 3 is obtained.

[0055] Referring to Figure 2 and Figure 3 , the fixing part 42 is used for realizing the detachable connection between the end of the supporting rod 41 and the implant body 1, and includes a fixing frame 421 fixed to the end of the supporting rod 41 away from the adjusting part 43 and a plurality of fixing columns 422 fixed to the side of the fixing frame 421 away from the supporting rod 41, wherein the fixing frame 421 and the first adjusting plate 431 are located on the same side of the supporting rod 41, and the guide cylinder 3 is inserted into the head embedding groove 13 on the implant body 1 from the fixing frame 421.

[0056] The fixing columns 422 are provided in multiple groups, two fixing columns 422 form a group, and the fixing space 423 for embedding the side wall of the implant body 1 is formed between the two fixing columns 422 in the same group. In the present application, the fixing columns 422 are provided in four groups, two fixing columns 422 form a row for clamping and fixing the same side of the implant body 1, and two rows of fixing columns 422 respectively clamp and fix the opposite sides of the implant body 1. The two groups of fixing columns 422 in the same row are spaced apart along the length direction of the implant body 1, so that the fixing between the supporting rod 41 and the implant body 1 is more firm.

[0057] Referring to Figure 2 , the holding part 31 includes a handle fixed to the end of the guide cylinder 3, and the handle is fixed to the side wall of the guide cylinder 3 and located on one side of the guide cylinder 3, so as to avoid the handle affecting the insertion of the fixing screw 2 into the guide cylinder 3. The handle can support the guide cylinder 3, so as to facilitate the worker to fix the position of the guide cylinder 3.

[0058] It can be understood that the width of the implant body 1 is smaller than the width of the upper vertebral body resection position, so that when the implant body 1 is placed in the upper vertebral body resection position, the fixed column 422 can be inserted between the implant body 1 and the cut surface of the human vertebral body. When the implant is fixed, bone cement can be filled into the bone cement chamber 12, and the bone cement in the bone cement chamber 12 also flows to the implant body 1 and the human vertebral body through the overflow hole 14 between the outer wall of the implant body 1 and the bone cement chamber 12, improving the firmness of the vertebral body, and also promoting postoperative fusion.

[0059] The implementation principle of the cervical spine anterior approach screw guide of the embodiment of the application is as follows: in use, the fixing part 42 is directly installed on the implant body 1, so that the end of the guide cylinder 3 away from the holding part 31 is embedded in one of the head embedding grooves 13, and the guide cylinder 3 is driven by the handle to slide in the sliding hole 4321 of the second adjusting plate 432, and the second adjusting plate 432 is operated to slide in the sliding groove 4341, so as to adjust the angle of the guide cylinder 3. After adjustment, the staff directly places the fixing screw 2 in the guide cylinder 3, and inserts the external rotating tool into the guide cylinder 3, drives the fixing screw 2 to rotate through the external rotating tool, so as to realize that the fixing screw 2 passes through the rod through hole 11 and is screwed on the human pedicle, until the head of the fixing screw 2 is embedded in the head embedding groove 13, so as to complete the installation of one fixing screw 2. Then, the connecting relationship between the fixing part 42 and the implant body 1 is released, the support rod 41 is rotated by 180 degrees, and the fixing part 42 is fixed on the implant body 1, so that the end of the guide cylinder 3 away from the holding part 31 is embedded in the other head embedding groove 13, and the other fixing screw 2 is installed, so as to complete the installation and fixation of the implant body 1. In the process of installing the fixing screw 2, the guide cylinder 3 can guide the rotation direction of the fixing screw 2, so as to ensure that the installation angle of the fixing screw 2 is correct, the installation is very convenient, and the convenience of fixing the implant is greatly improved, so that the fixation of the implant is more firm.

[0060] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made on the basis of the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A cervical spine anterior cervical screw placement guide, characterized in that, The utility model relates to a kind of implant fixation device, including: guide cylinder (3), one end is embedded in the head embedding slot (13) on implant body (1) for the installation of fixed screw (2) is guided, the other end is provided with holding portion (31);Support body (4), for the support guiding of the one end of the guide cylinder (3) close to holding portion (31) to adjust the placement angle of the guide cylinder (3);The support body (4) includes support rod (41), the fixed part (42) for being arranged in the one end of the support rod (41) for being connected with implant body (1) and the adjusting part (43) for being arranged in the other end of the support rod (41) for being connected with the guide cylinder (3), the adjusting part (43) is connected with the one end of the guide cylinder (3) close to the holding portion (31) for adjusting the position of the one end of the guide cylinder (3) close to the holding portion (31) in two-dimensional direction; The adjusting part (43) includes first adjusting plate (431) fixed in the one end of the support rod (41), second adjusting plate (432) slidingly connected on the first adjusting plate (431) and fixed plate (433) fixed on the guide cylinder (3) and slidingly matched with the second adjusting plate (432), the second adjusting plate (432) drives the fixed plate (433) to slide along the length direction of the first adjusting plate (431), and the fixed plate (433) slides along the width direction of the first adjusting plate (431) on the second adjusting plate (432); The fixed part (42) includes fixed frame (421) fixed in the end of the support rod (41) and a plurality of fixed columns (422) fixed in the side of the fixed frame (421) away from the support rod (41), two of the fixed columns (422) form a fixed space (423) for the side wall of implant body (1) to be embedded in the same group; The one end of the guide cylinder (3) close to the holding portion (31) is slid in the sliding hole (4321) of the second adjusting plate (432) by handle, and the second adjusting plate (432) is slid in the sliding groove (4341) by operation, to realize the adjustment of the angle of the guide cylinder (3);After adjustment, the staff directly places the fixed screw (2) in the guide cylinder (3), and inserts the external rotating tool into the guide cylinder (3), rotates the fixed screw (2) by the external rotating tool, to realize that the fixed screw (2) passes through the rod hole (11) and is screwed on the human pedicle, until the head of the fixed screw (2) is embedded in the head embedding slot (13), to complete the installation of one fixed screw (2). The second adjusting plate (432) is fixed with mounting strip (434) on opposite sides, and the sliding groove (4341) for embedding the first adjusting plate (431) is formed on the opposite side of the two mounting strips (434), and the sliding groove (4341) is located on one side of the second adjusting plate (432).

2. The cervical spine anterior approach screw guide according to claim 1, wherein: ​ 3. The cervical spine anterior approach screw guide of claim 2, wherein: The first adjusting plate (431) and the second adjusting plate (432) are arc-shaped plates, the sliding groove (4341) is an arc-shaped groove, and the arc center of the sliding groove (4341) is arranged in a staggered manner with the arc center of the first adjusting plate (431).

4. The cervical spine anterior approach screw guide of claim 2, wherein: A plurality of first scale grooves (4311) are formed on the first adjusting plate (431) along the length direction of the first adjusting plate (431), and the end of the mounting strip (434) can be embedded in the first scale groove (4311).

5. The cervical spine anterior approach screw guide according to claim 1, wherein: The second adjusting plate (432) is provided with a sliding hole (4321) for embedding the guide cylinder (3), the sliding hole (4321) is in a strip shape, and the fixing plate (433) and the second adjusting plate (432) are provided with a fixing member (44) for fixing the position of the fixing plate (433) on the second adjusting plate (432).

6. The cervical spine anterior approach screw guide according to claim 5, wherein: The fixing member (44) comprises a limiting column (441) fixed to the side of the fixing plate (433) facing the second adjusting plate (432), and the limiting column (441) is in clamping cooperation with the sliding hole (4321).

7. The cervical spine anterior approach screw guide according to claim 6, wherein: The limiting column (441) is provided with a plurality of limiting columns (441), two limiting columns (441) are a group, and when the limiting column (441) is embedded in the sliding hole (4321), the two limiting columns (441) in the same group abut against the two inner walls of the sliding hole (4321) opposite to each other.

8. The cervical spine anterior approach screw guide according to claim 1, wherein: The holding part (31) comprises a handle fixed to the end of the guide cylinder (3).

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