Precise guiding osteotomy instrument for sacrum center joint and operation method thereof

Abstract

The invention relates to the technical field of medical surgical instruments, in particular to an osteotomy instrument for accurate guidance of a sacrum center joint and an operation method thereof.The osteotomy instrument for accurate guidance of the sacrum center joint comprises a positioning plate, and the positioning plate is used for being matched with the detailed feature surface area of the pelvis of a patient; the osteotomy guiding piece is fixedly connected with the positioning plate, an osteotomy guiding channel which extends in the linear direction and penetrates through the osteotomy guiding piece is formed in the osteotomy guiding piece, and the osteotomy guiding channel is used for guiding a swing saw or an ultrasonic osteotome; the kirschner wire is used for fixing the positioning plate and the pelvis of the patient. The osteotomy guiding device has the effects of stably guiding the osteotomy tool and reducing operation time consumption.

Description

Technical Field

[0001] The present application relates to the technical field of medical surgical instruments, and in particular to an instrument for accurately guiding osteotomy of the sacral suture and an operating method thereof. Background Art

[0002] Pelvic malignant tumors, including various primary malignant tumors (such as osteosarcoma, chondrosarcoma, Ewing's sarcoma, etc.) and metastatic tumors (such as renal cancer, lung cancer, breast cancer, prostate cancer metastasis, etc.), are common pelvic diseases. These tumors often involve the sacrum. Since there are multiple organs and soft tissues such as nerves and blood vessels in this area, in order to ensure the patient's life safety, it is usually necessary to partially resect the sacral lesions. In order to reduce the possibility of postoperative recurrence, osteotomy is often required, so osteotomy near the sacral suture is particularly common. With the development of digitalization and medicine, personalized prostheses for the sacrum are gradually used in clinical practice. The difficulties of this type of surgery are mainly concentrated in the following aspects: First, how to accurately resect according to preoperative planning to ensure good coordination with the implanted prosthesis and the accuracy of the preoperative planning of the direction and position of the nailing; second, how to reduce the time of surgery and osteotomy to reduce the risk of infection caused by long-term anatomical exposure of patients during surgery; third, how to reduce the difficulty of surgery and improve surgical efficiency, especially in the complex anatomical environment near the sacral suture, to avoid nerve damage and simplify the osteotomy process.

[0003] The osteotomy techniques in the related technologies mainly include the use of various tools such as Kirschner wires, positioning plates, ultrasonic bone knives, oscillating saws, wire saws and bone forceps. Among them, Kirschner wires are mainly used for fixation and guidance, but a single positioning plate is difficult to cope with the complex anatomical structure near the sacral suture and is easy to move during surgery; although ultrasonic bone knives and oscillating saws can accurately cut bones, there are certain risks when used in areas rich in nerves; wire saws are suitable for fine cutting in small spaces, but require accurate guidance and positioning. Overall, although these conventional methods can effectively achieve osteotomy in some cases, they still have obvious limitations in their application near the sacral suture. Summary of the invention

[0004] In order to stably guide the osteotomy tool and reduce the time of surgery, the present application provides a precise guidance osteotomy instrument for the sacral suture and an operation method thereof.

[0005] In the first aspect, the present application provides a precise guided osteotomy instrument for the sacral suture, which adopts the following technical solution: A precision-guided osteotomy instrument for the sacral suture comprises a positioning plate, the positioning plate being used to cooperate with a detailed characteristic surface area of ​​a patient's pelvis; an osteotomy guide, the osteotomy guide being fixedly connected to the positioning plate, the osteotomy guide being provided with an osteotomy guide channel extending in a straight direction and passing through the osteotomy guide, the osteotomy guide channel being used to guide an oscillating saw or an ultrasonic bone knife; and a Kirschner wire, the Kirschner wire being used to fix the positioning plate to the patient's pelvis.

[0006] By adopting the above technical solution, the instrument can achieve precise osteotomy of the sacral suture, significantly improving the safety and accuracy of the operation. The coordination between the positioning plate and multiple characteristic surface areas of the patient's pelvis ensures the stability and accuracy of the osteotomy guide during the operation, avoiding the problem of easy displacement of the osteotomy guide in traditional methods. The osteotomy guide channel on the osteotomy guide can accurately guide the oscillating saw or ultrasonic bone knife for osteotomy, improving the efficiency of the operation. The use of Kirschner wires further enhances the fixation effect of the instrument, ensuring that the osteotomy guide will not move during the operation, thereby ensuring the accuracy and safety of the osteotomy. In general, the instrument not only improves the success rate of the operation, but also reduces the operation time and the risk of intraoperative exposure of the patient, and reduces the probability of postoperative complications.

[0007] Optionally, the pelvic detailed feature surface area includes a lumbar spinous process area, an affected-side posterior superior iliac spine area, a healthy-side sacral spinous process area and a healthy-side sacrum area, and the positioning plate includes a lumbar spinous process positioning plate, an affected-side posterior superior iliac spine positioning plate, a healthy-side sacral spinous process positioning plate and a healthy-side sacral positioning plate, the lumbar spinous process positioning plate has a surface contour that matches the lumbar spinous process area, the affected-side posterior superior iliac spine positioning plate has a surface contour that matches the affected-side posterior superior iliac spine area, the healthy-side sacral spinous process positioning plate has a surface contour that matches the healthy-side sacral spinous process area, and the healthy-side sacral positioning plate has a surface contour that matches the healthy-side sacral area.

[0008] By adopting the above technical solution, the lumbar spinous process positioning plate, the affected posterior superior iliac spine positioning plate, the healthy sacral spinous process positioning plate and the healthy sacral positioning plate are respectively matched with the lumbar spinous process area, the affected posterior superior iliac spine area, the healthy sacral spinous process area and the healthy sacral area, thereby improving the accuracy and stability of positioning. This multi-area positioning method can not only ensure that the osteotomy guide will not be displaced during the operation, but also maintain the stability of the osteotomy guide during the osteotomy process, thereby ensuring the accuracy of the osteotomy.

[0009] Optionally, the lumbar spinous process positioning plate is fixedly connected to the affected-side posterior superior iliac spine positioning plate through the affected-side first connecting column, the affected-side posterior superior iliac spine positioning plate is fixedly connected to the osteotomy guide through the affected-side second connecting column, the healthy-side sacral spinous process positioning plate and the osteotomy guide are integrally formed, and the healthy-side sacral positioning plate is fixedly connected to the healthy-side sacral spinous process positioning plate through the healthy-side connecting column.

[0010] By adopting the above technical solution, the positioning plate and the detailed characteristic surface area of ​​the patient's pelvis are positioned at multiple points to ensure that the osteotomy guide remains stable during the entire operation and prevent osteotomy errors caused by the movement of the osteotomy guide. At the same time, the setting of the first connecting column on the affected side and the second connecting column on the affected side effectively connects the lumbar spinous process positioning plate, the affected side posterior superior iliac spine positioning plate and the osteotomy guide, so that the various components work together to improve the overall rigidity and stability of the osteotomy guide. The one-piece molding design of the healthy side sacral spinous process positioning plate and the osteotomy guide further enhances the firmness and precision of the structure. In addition, the setting of the healthy side connecting column enables the healthy side sacral positioning plate to be firmly connected to the healthy side sacral spinous process positioning plate, increasing the reliability and safety of the entire instrument. These designs together improve the accuracy and safety of the operation and reduce the operation time and risk.

[0011] Optionally, the affected-side posterior superior iliac spine positioning plate and the healthy-side sacrum positioning plate are provided with a plurality of needle entry holes, and the needle entry holes are used to guide the Kirschner wires.

[0012] By adopting the above technical solution, the Kirschner wire can ensure the firm fixation of the positioning plate to the patient's pelvis, further enhance the stability and accuracy of the instrument, prevent displacement during the osteotomy process, and thus improve the safety and success rate of the operation.

[0013] Optionally, the number of the needle entry holes located at the affected-side posterior superior iliac spine positioning plate is at least two, the number of the needle entry holes located at the healthy-side sacrum positioning plate is at least two, and the total number of the needle entry holes is not less than five.

[0014] By adopting the above technical solution, multiple needle holes are set on the affected posterior superior iliac spine positioning plate and the healthy sacrum positioning plate to ensure that there are enough Kirschner wires, which can effectively fix the positioning plate and prevent displacement during the operation, thereby ensuring the accuracy and stability of the osteotomy. In addition, the number of needle holes can also be set to adapt to the specific conditions of different patients. At least 5 needle holes can ensure stability, thereby reducing the time used to insert Kirschner wires during the operation.

[0015] Optionally, the length of the Kirschner wire is not less than 1.5 cm.

[0016] By adopting the above technical solution, the length of the Kirschner wire is not less than 1.5 cm, ensuring that the Kirschner wire can firmly fix the positioning plate on the patient's pelvis and prevent the guide plate from moving during the operation, thereby ensuring the accuracy and stability of the osteotomy process.

[0017] Optionally, a positioning hole is provided at one end of the osteotomy guide channel, and the positioning hole is used to guide the hollow nail carrying the wire saw to be nailed into the space between the lumbar vertebrae and the sacrum.

[0018] By adopting the above technical solution, the positioning hole can accurately guide the hollow nail carrying the wire saw into the gap between the lumbar vertebrae and the sacrum, ensuring that the wire saw accurately reaches the predetermined position. Guiding the hollow nail through the positioning hole can reduce the potential risk of damage to peripheral nerves and other important structures during surgery, thereby improving the safety of the surgery. The design of the positioning hole makes the introduction of the wire saw simpler and faster, reduces the operation time and complexity, and improves the efficiency of the operation.

[0019] In a second aspect, the present application provides an operation method for a precise guided osteotomy instrument for the sacral suture, using the following technical solution: A method for operating a precision-guided osteotomy instrument for the sacral suture comprises the following steps: S1. Dissect the patient from the posterior approach; S2: Perform precise dissection of the detailed surface area of ​​the patient's pelvis and use bone forceps to initially process part of the sacral spinous process area; S3, matching the positioning plate with the detailed characteristic surface area of ​​the patient's pelvis, and fixing the positioning plate with a Kirschner pin; S4, using ultrasonic fixation wave to assist bone forceps to perform osteotomy on the spinous process of the sacrum; S5. Use an oscillating saw or ultrasonic osteotome to insert into the osteotomy guide channel to perform osteotomy. If there is a positioning hole, a hollow nail can be driven into the positioning hole, and the wire saw is guided from the hollow nail to the gap between the sacrum and the lumbar intervertebral disc to perform osteotomy. S6. After osteotomy is completed, the prosthesis is installed, soft tissue is processed, and final suturing is performed according to routine procedures.

[0020] By adopting the above technical solution, due to the existence of the vertebral canal in the sacral suture, osteotomy will also destroy the positioning surface. The use of a precise osteotomy instrument to guide the sacral suture for osteotomy surgery can ensure that the position of the instrument will not change due to the osteotomy operation during the operation, and the accuracy of osteotomy during the entire operation can be guaranteed. During the installation of this instrument, only a few Kirschner wires are required to complete the fixation, which can reduce the operation time, reduce the patient's intraoperative anatomical exposure time, reduce the risk of infection, and improve the success rate of the operation. At the same time, after the installation of this instrument, a variety of tools and osteotomy methods can be used. The doctor during the operation will perform osteotomy according to the usage habits. The combination of multiple osteotomy methods can greatly improve the efficiency of osteotomy.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through three-dimensional reconstruction of the patient's CT data, the positioning plate is ensured to fit perfectly with the detailed surface area of ​​the patient's pelvis, thereby achieving precise positioning and reducing uncertainty and errors during surgery; 2. By setting multiple needle holes on the affected posterior superior iliac spine positioning plate and the healthy sacrum positioning plate, the Kirschner wire can firmly fix the positioning plate on the patient's pelvis, further improving the safety and stability of the operation; 3. The osteotomy guide channel can accommodate a variety of osteotomy tools, such as oscillating saws, ultrasonic bone knives and wire saws. Doctors can choose appropriate tools for osteotomy according to actual conditions, which improves the flexibility and efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a precise guided osteotomy instrument for the sacral suture provided in an embodiment of the present application.

[0023] Figure 2 It is a schematic diagram of a color model of a precision-guided osteotomy instrument for the sacral suture provided in an embodiment of the present application.

[0024] Explanation of the reference numerals: 1- lumbar spinous process positioning plate; 2- positioning plate of the posterior superior iliac spine on the affected side; 3- positioning plate of the sacral spinous process on the healthy side; 4- positioning plate of the sacrum on the healthy side; 5- osteotomy guide; 501- osteotomy guide channel; 502- positioning hole; 6- first connecting column on the affected side; 7- second connecting column on the affected side; 8- connecting column on the healthy side; 9- needle entry hole; 10- Kirschner wire; 11- lumbar vertebra; 12- ilium on the affected side; 13- sacrum on the affected side; 14- ilium on the healthy side; 15- sacrum on the healthy side. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-2 This application is described in further detail.

[0026] The embodiment of the present application discloses an instrument for precisely guiding osteotomy of the sacral suture.

[0027] like Figure 1 and Figure 2 As shown, the instrument for accurately guiding osteotomy for the sacral suture (hereinafter referred to as "the instrument", "the instrument" or "the instrument") comprises a positioning plate, an osteotomy guide 5 and a Kirschner wire 10. The patient's pelvic region comprises a lumbar vertebra 11, an affected ilium 12, an affected sacrum 13, a healthy ilium 14 and a healthy sacrum 15.

[0028] The positioning plate is used to cooperate with the detailed feature surface area of ​​the patient's pelvis; the osteotomy guide 5 is fixedly connected to the positioning plate, and the osteotomy guide 5 is provided with an osteotomy guide channel 501 extending in a straight direction and passing through the osteotomy guide 5, and the osteotomy guide channel 501 is used to guide an oscillating saw or an ultrasonic bone knife; the Kirschner wire 10 is used to fix the positioning plate to the patient's pelvis.

[0029] This instrument achieves precise osteotomy of the sacral suture, significantly improving the safety and accuracy of the operation. The precise coordination between the positioning plate and multiple characteristic surface areas of the patient's pelvis ensures the stability and accuracy of the osteotomy guide 5 during the operation, effectively avoiding the problem of easy displacement of the traditional osteotomy guide 5. The osteotomy guide channel 501 on the osteotomy guide 5 can accurately guide the oscillating saw or ultrasonic bone knife to perform osteotomy, thereby improving the efficiency of the operation. The use of Kirschner wires 10 further enhances the fixation effect of the instrument, ensuring that the osteotomy guide 5 will not move during the operation, thereby ensuring the accuracy and safety of the osteotomy. In general, this instrument not only improves the success rate of the operation, but also reduces the operation time and the risk of intraoperative exposure of the patient, and reduces the probability of postoperative complications.

[0030] like Figure 1 and Figure 2 As shown, specifically, the detailed characteristic surface area of ​​the pelvis includes the lumbar spinous process area, the affected-side posterior superior iliac spine area, the healthy-side sacral spinous process area and the healthy-side sacrum area, and the positioning plates include a lumbar spinous process positioning plate 1, an affected-side posterior superior iliac spine positioning plate 2, a healthy-side sacral spinous process positioning plate 3 and a healthy-side sacral positioning plate 4. The lumbar spinous process positioning plate 1 has a surface contour that matches the lumbar spinous process area, the affected-side posterior superior iliac spine positioning plate 2 has a surface contour that matches the affected-side posterior superior iliac spine area, the healthy-side sacral spinous process positioning plate 3 has a surface contour that matches the healthy-side sacral spinous process area, and the healthy-side sacral positioning plate 4 has a surface contour that matches the healthy-side sacral area.

[0031] The positioning plates used in the present invention include the lumbar spinous process positioning plate 1, the affected posterior superior iliac spine positioning plate 2, the healthy sacral spinous process positioning plate 3, and the healthy sacral positioning plate 4, which are precisely matched with the lumbar spinous process area, the affected posterior superior iliac spine area, the healthy sacral spinous process area, and the healthy sacral area, respectively, significantly improving the accuracy and stability of positioning. This multi-area positioning strategy not only ensures the stable fixation of the osteotomy guide 5 during the operation to prevent it from shifting, but also maintains the stability of the osteotomy guide 5 during the osteotomy operation, thereby ensuring the accuracy of the osteotomy operation.

[0032] like Figure 1 and Figure 2As shown, in order to ensure the relative fixation between the osteotomy guide 5 and the positioning plate, the lumbar spinous process positioning plate 1 is fixedly connected to the affected side posterior superior iliac spine positioning plate 2 through the affected side first connecting column 6, the affected side posterior superior iliac spine positioning plate 2 is fixedly connected to the osteotomy guide 5 through the affected side second connecting column 7, the healthy side sacral spinous process positioning plate 3 and the osteotomy guide 5 are integrally formed, and the healthy side sacral positioning plate 4 is fixedly connected to the healthy side sacral spinous process positioning plate 3 through the healthy side connecting column 8.

[0033] The setting of the first connecting column 6 on the affected side and the second connecting column 7 on the affected side effectively connects the lumbar spinous process positioning plate 1, the posterior superior iliac spine positioning plate 2 on the affected side and the osteotomy guide 5, so that the various components work together to improve the overall rigidity and stability of the osteotomy guide 5. The one-piece molding design of the healthy side sacral spinous process positioning plate 3 and the osteotomy guide 5 further enhances the firmness and accuracy of the structure. In addition, the setting of the healthy side connecting column 8 makes the healthy side sacral positioning plate 4 firmly connected to the healthy side sacral spinous process positioning plate 3, increasing the reliability and safety of the entire instrument. These designs together improve the accuracy and safety of the operation and reduce the operation time and risk.

[0034] like Figure 1 and Figure 2 As shown, in order to ensure the relative fixation between the positioning plate and the patient's pelvis, a plurality of needle holes 9 are provided on the affected-side posterior superior iliac spine positioning plate 2 and the healthy-side sacrum positioning plate 4, wherein the number of needle holes 9 located at the affected-side posterior superior iliac spine positioning plate 2 is at least two, and the number of needle holes 9 located at the healthy-side sacrum positioning plate 4 is at least two, and the total number of needle holes 9 is not less than five. The needle holes 9 are used to guide Kirschner wires 10. A plurality of needle holes 9 are provided on the affected-side posterior superior iliac spine positioning plate 2 and the healthy-side sacrum positioning plate 4 to ensure that the number of Kirschner wires 10 is sufficient, and the positioning plate can be effectively fixed to prevent displacement during the operation, thereby ensuring the accuracy and stability of the osteotomy. The Kirschner wire 10 can ensure the firm fixation of the positioning plate and the patient's pelvis, further enhance the stability and accuracy of the instrument, prevent displacement during the osteotomy process, thereby improving the safety and success rate of the operation. The number of needle holes 9 can also be set to adapt to the specific conditions of different patients. At least 5 needle holes 9 can ensure stability, thereby reducing the time used for inserting the Kirschner wire 10 during the operation.

[0035] like Figure 1 and Figure 2 As shown, to ensure the stability of the Kirschner wire 10, its length must be no less than 1.5 cm to ensure that the Kirschner wire 10 can firmly fix the positioning plate to the patient's pelvis, prevent the guide plate from moving during the operation, and thus ensure the accuracy and stability of the osteotomy process.

[0036] like Figure 1 and Figure 2As shown, a positioning hole 502 may be provided at one end of the osteotomy guide channel 501, and the positioning hole 502 is intended to guide the hollow nail and the wire saw into the gap between the lumbar vertebra 11 and the sacrum. The design of the positioning hole 502 can accurately guide the hollow nail and the wire saw to the predetermined position of the gap between the lumbar vertebra 11 and the sacrum, ensuring that the wire saw can accurately reach the target area. By using the positioning hole 502 to guide the hollow nail, the potential risk of damage to the peripheral nerves and other important anatomical structures during the operation can be effectively reduced, thereby improving the safety of the operation. In addition, the introduction of the positioning hole 502 simplifies the insertion process of the wire saw, shortens the operation time, reduces the complexity of the surgical operation, and thus improves the efficiency of the operation.

[0037] The embodiment of the present application also discloses an operation method of a precise guidance osteotomy instrument for the sacral suture.

[0038] The method of operating the precise guided osteotomy instrument for the sacral suture includes the following steps: S1. Dissect the patient from the posterior approach; S2: Perform precise dissection of the detailed surface area of ​​the patient's pelvis and use bone forceps to initially process part of the sacral spinous process area; S3, matching the positioning plate with the detailed characteristic surface area of ​​the patient's pelvis, and fixing the positioning plate with a Kirschner wire 10; S4, using ultrasonic fixation wave to assist bone forceps to perform osteotomy on the spinous process of the sacrum; S5, using an oscillating saw or ultrasonic osteotome to insert into the osteotomy guide channel 501 to perform osteotomy. If there is a positioning hole 502, a hollow nail can be driven into the positioning hole 502, and the wire saw can be guided from the hollow nail to the gap between the sacrum and the lumbar vertebra 11 interdisc to perform osteotomy; S6. After osteotomy is completed, the prosthesis is installed, soft tissue is processed, and final suturing is performed according to routine procedures.

[0039] The implementation principle of an operating method of a precision-guided osteotomy instrument for the sacral suture is as follows: due to the existence of the vertebral canal in the sacral suture, osteotomy will also destroy the positioning surface. Using a precision-guided osteotomy instrument for the sacral suture to perform osteotomy surgery can ensure that the position of the instrument will not change due to the osteotomy operation during the operation, and can ensure the accuracy of osteotomy during the entire operation. During the installation of this instrument, only a few Kirschner wires 10 are required to complete the fixation, which can reduce the operation time, reduce the patient's intraoperative anatomical exposure time, reduce the risk of infection, and improve the success rate of the operation. At the same time, after the installation of this instrument, a variety of tool osteotomy methods can be used, and the doctor during the operation will perform osteotomy according to the usage habits. The combination of multiple osteotomy methods can greatly improve the efficiency of osteotomy.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A precision guided osteotomy instrument for the sacral suture, characterized in that: include: A positioning plate, the positioning plate is used to cooperate with the detailed characteristic surface area of ​​the patient's pelvis; An osteotomy guide (5), the osteotomy guide (5) being fixedly connected to the positioning plate, the osteotomy guide (5) being provided with an osteotomy guide channel (501) extending in a straight line direction and passing through the osteotomy guide (5), the osteotomy guide channel (501) being used to guide an oscillating saw or an ultrasonic osteotome; A Kirschner wire (10) is used to fix the positioning plate to the patient's pelvis.

2. The precise guided osteotomy instrument for the sacral suture according to claim 1, characterized in that: The pelvic detailed feature surface area includes a lumbar spinous process area, an affected side posterior superior iliac spine area, a healthy side sacral spinous process area and a healthy side sacral area. The positioning plate includes a lumbar spinous process positioning plate (1), an affected side posterior superior iliac spine positioning plate (2), a healthy side sacral spinous process positioning plate (3) and a healthy side sacral positioning plate (4). The lumbar spinous process positioning plate (1) has a surface contour that matches the lumbar spinous process area, the affected side posterior superior iliac spine positioning plate (2) has a surface contour that matches the affected side posterior superior iliac spine area, the healthy side sacral spinous process positioning plate (3) has a surface contour that matches the healthy side sacral spinous process area, and the healthy side sacral positioning plate (4) has a surface contour that matches the healthy side sacral area.

3. The precise guided osteotomy instrument for the sacral suture according to claim 2, characterized in that: The lumbar spinous process positioning plate (1) is fixedly connected to the affected side posterior superior iliac spine positioning plate (2) via the affected side first connecting column (6), the affected side posterior superior iliac spine positioning plate (2) is fixedly connected to the osteotomy guide (5) via the affected side second connecting column (7), the healthy side sacral spinous process positioning plate (3) and the osteotomy guide (5) are integrally formed, and the healthy side sacral positioning plate (4) is fixedly connected to the healthy side sacral spinous process positioning plate (3) via the healthy side connecting column (8).

4. The precise guided osteotomy instrument for the sacral suture according to claim 3, characterized in that: The affected-side posterior superior iliac spine positioning plate (2) and the healthy-side sacrum positioning plate (4) are provided with a plurality of needle insertion holes (9), and the needle insertion holes (9) are used to guide the Kirschner wires (10).

5. The precise guided osteotomy instrument for the sacral suture according to claim 4, characterized in that: The number of the needle entry holes (9) located at the affected-side posterior superior iliac spine positioning plate (2) is at least two, the number of the needle entry holes (9) located at the healthy-side sacrum positioning plate (4) is at least two, and the total number of the needle entry holes (9) is not less than five.

6. The precise guided osteotomy instrument for the sacral suture according to claim 4, characterized in that: The length of the Kirschner wire (10) is not less than 1.5 cm.

7. The precise guided osteotomy instrument for the sacral suture according to claim 1, characterized in that: One end of the osteotomy guide channel (501) is provided with a positioning hole (502), and the positioning hole (502) is used to guide the hollow nail carrying the wire saw to be nailed into the space between the lumbar vertebra (11) and the sacrum.

8. A method for operating a precision-guided osteotomy instrument for the sacral suture, characterized in that: The method for using the precise guided osteotomy instrument for the sacral suture as claimed in any one of claims 1 to 6 to assist a doctor in performing an osteotomy operation near the sacral suture on a patient comprises: S1. Dissect the patient from the posterior approach; S2: Perform precise dissection of the detailed surface area of ​​the patient's pelvis and use bone forceps to initially process part of the sacral spinous process area; S3, matching the positioning plate with the detailed characteristic surface area of ​​the patient's pelvis, and fixing the positioning plate with a Kirschner wire (10); S4, using ultrasonic fixation wave to assist bone forceps to perform osteotomy on the spinous process of the sacrum; S5, using an oscillating saw or ultrasonic bone knife to insert into the osteotomy guide channel (501) to perform osteotomy. If there is a positioning hole (502), a hollow nail can be driven into the positioning hole (502), and the wire saw is guided from the hollow nail to the gap between the sacrum and the lumbar disc (11) to perform osteotomy; S6. After osteotomy is completed, the prosthesis is installed, soft tissue is processed, and final suturing is performed according to routine procedures.

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