A precise guiding osteotomy instrument for the middle sacral joint and a method of operating the same

Abstract

The application relates to the technical field of medical operation instruments, in particular to a precise sacral midline guiding osteotomy instrument and an operation method thereof, wherein the precise sacral midline guiding osteotomy instrument comprises a positioning plate used for cooperating with a detailed feature surface area of a patient's pelvis; an osteotomy guide fixedly connected with the positioning plate, wherein the osteotomy guide is provided with an osteotomy guide channel extending along a straight line direction and penetrating through the osteotomy guide, and the osteotomy guide channel is used for guiding a swing saw or an ultrasonic bone knife; and a Kirschner wire used for fixing the positioning plate and the patient's pelvis. The application has the effects of stably guiding an osteotomy tool and reducing operation time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical surgical instruments, in particular to a precise guiding osteotomy instrument for sacral midline and an operation method thereof. BACKGROUND

[0002] Pelvic malignant tumors, including various primary malignant tumors (such as osteosarcoma, chondrosarcoma, Ewing's sarcoma, etc.) and metastatic tumors (such as kidney cancer, lung cancer, breast cancer metastasis, etc.), are common pelvic diseases. These tumors often involve the sacral region. Due to the presence of various organs and soft tissues such as nerves and blood vessels in this area, in order to ensure the safety of the patient's life, it is often necessary to resect part of the sacral lesion. In order to reduce the possibility of postoperative recurrence, osteotomy is often required, and therefore the osteotomy near the sacral midline is particularly common. With the development of digitization and medicine, individualized prostheses for the sacral region are gradually applied in clinical practice. The difficulties of this type of surgery mainly focus on the following aspects: first, how to accurately resect according to the preoperative plan to ensure good compatibility with the implanted prosthesis and the accuracy of the preoperative drilling direction and position; second, how to reduce the operation time and the time-consuming in the osteotomy process to reduce the risk of infection caused by long-term anatomical exposure of the patient during the operation; third, how to reduce the difficulty of the operation and improve the efficiency of the operation, especially in the complex anatomical environment near the sacral midline, it is necessary to avoid damaging the nerves and simplify the osteotomy process.

[0003] The osteotomy technology in the related art mainly includes the use of Kirschner wire, positioning plate, ultrasonic bone knife, swing saw, wire saw and bone forceps and other tools. Among them, the Kirschner wire is mainly used for fixation and guidance, but a single positioning plate is difficult to cope with the complex anatomical structure near the sacral midline and is easy to move during the operation; the ultrasonic bone knife and the swing saw can accurately cut the bone, but there is a certain risk when used in the area rich in nerves; the wire saw is suitable for fine cutting in a narrow space, but accurate guidance and positioning are required. In summary, although these conventional means can effectively achieve osteotomy in some cases, there are still obvious limitations in their application near the sacral midline. SUMMARY

[0004] In order to be able to stably guide the osteotomy tool and reduce the time-consuming of the operation, the present application provides a precise guiding osteotomy instrument for sacral midline and an operation method thereof.

[0005] In a first aspect, the present application provides a precise guiding osteotomy instrument for sacral midline, which adopts the following technical solution:

[0006] The application discloses a precise osteotomy instrument for the middle sacral joint, which comprises a positioning plate used for cooperating with the surface area of the detailed features of the patient's pelvis, an osteotomy guide fixedly connected with the positioning plate, and an osteotomy guide channel provided on the osteotomy guide and extending in a straight line direction and penetrating through the osteotomy guide, the osteotomy guide channel being used for guiding a swing saw or an ultrasonic bone cutter, and a Kirschner wire used for fixing the positioning plate and the patient's pelvis.

[0007] By adopting the above technical scheme, the instrument can realize precise osteotomy of the middle sacral joint, significantly improve the safety and accuracy of the operation, and ensure the stability and accuracy of the osteotomy guide in the operation process, thereby avoiding the problem that the osteotomy guide is easy to displace in the traditional method. The osteotomy guide channel on the osteotomy guide can precisely guide the swing saw or the ultrasonic bone cutter to perform osteotomy, thereby improving the operation efficiency. The use of the Kirschner wire further enhances the fixing effect of the instrument, ensures that the osteotomy guide does not move in the operation process, and guarantees the accuracy and safety of osteotomy. In general, the instrument not only improves the success rate of the operation, but also reduces the operation time and the risk of patient exposure during the operation, and reduces the probability of postoperative complications.

[0008] Optionally, the surface area of the detailed features of the pelvis comprises a lumbar spine spinous process area, a diseased side posterior superior iliac spine area, a healthy side sacral spine process area and a healthy side sacral bone area, the positioning plate comprises a lumbar spine spinous process positioning plate, a diseased side posterior superior iliac spine positioning plate, a healthy side sacral spine process positioning plate and a healthy side sacral bone positioning plate, the lumbar spine spinous process positioning plate has a surface contour matched with the lumbar spine spinous process area, the diseased side posterior superior iliac spine positioning plate has a surface contour matched with the diseased side posterior superior iliac spine area, the healthy side sacral spine process positioning plate has a surface contour matched with the healthy side sacral spine process area, and the healthy side sacral bone positioning plate has a surface contour matched with the healthy side sacral bone area.

[0009] By adopting the above technical scheme, the lumbar spine spinous process positioning plate, the diseased side posterior superior iliac spine positioning plate, the healthy side sacral spine process positioning plate and the healthy side sacral bone positioning plate are respectively matched with the lumbar spine spinous process area, the diseased side posterior superior iliac spine area, the healthy side sacral spine process area and the healthy side sacral bone area, thereby improving the accuracy and stability of positioning. The multi-area positioning mode can not only ensure that the osteotomy guide does not displace in the operation process, but also maintain the stability of the osteotomy guide in the osteotomy process, thereby guaranteeing the accuracy of osteotomy.

[0010] Optionally, the lumbar spinous process positioning plate is fixedly connected with the ipsilateral posterior superior iliac spine positioning plate through an ipsilateral first connecting column, the ipsilateral posterior superior iliac spine positioning plate is fixedly connected with the osteotomy guide through an ipsilateral second connecting column, the contralateral sacral spinous process positioning plate is integrally formed with the osteotomy guide, and the contralateral sacral positioning plate is fixedly connected with the contralateral sacral spinous process positioning plate through a contralateral connecting column.

[0011] By adopting the above technical scheme, the positioning plate is positioned with the detailed feature surface area of the patient's pelvis through multiple points, so that the osteotomy guide remains stable during the entire surgical process and prevents osteotomy errors caused by movement of the osteotomy guide. Meanwhile, the setting of the ipsilateral first connecting column and the ipsilateral second connecting column effectively connects the lumbar spinous process positioning plate, the ipsilateral posterior superior iliac spine positioning plate and the osteotomy guide, so that the components cooperate with each other, thereby improving the overall rigidity and stability of the osteotomy guide. The integrally formed design of the contralateral sacral spinous process positioning plate and the osteotomy guide further enhances the firmness and accuracy of the structure. In addition, the setting of the contralateral connecting column enables the contralateral sacral positioning plate to be fixedly connected with the contralateral sacral spinous process positioning plate, thereby increasing the reliability and safety of the entire instrument. These designs collectively improve the accuracy and safety of the surgery and reduce the surgery time and risks.

[0012] Optionally, a plurality of needle insertion holes are arranged on the ipsilateral posterior superior iliac spine positioning plate and the contralateral sacral positioning plate, and the needle insertion holes are used for guiding the Kirschner wire.

[0013] By adopting the above technical scheme, the Kirschner wire can ensure firm fixation of the positioning plate with the patient's pelvis, further enhance the stability and accuracy of the instrument, prevent displacement during the osteotomy process, and thereby improve the safety and success rate of the surgery.

[0014] Optionally, the number of needle insertion holes arranged on the ipsilateral posterior superior iliac spine positioning plate is at least two, the number of needle insertion holes arranged on the contralateral sacral positioning plate is at least two, and the total number of the needle insertion holes is not less than five.

[0015] By adopting the above technical scheme, a plurality of needle insertion holes are arranged on the ipsilateral posterior superior iliac spine positioning plate and the contralateral sacral positioning plate, so that the number of Kirschner wires is sufficient to effectively fix the positioning plate and prevent displacement during the surgery, thereby ensuring the accuracy and stability of the osteotomy. In addition, the number of needle insertion holes can also adapt to the specific conditions of different patients, and at least five needle insertion holes can ensure stability, thereby reducing the time for driving the Kirschner wire during the surgery.

[0016] Optionally, the length of the Kirschner wire is not less than 1.5 cm.

[0017] By adopting the technical scheme, the length of the Kirschner wire is not less than 1.5 cm, which ensures that the Kirschner wire can firmly fix the positioning plate on the patient's pelvis, prevents the guide plate from moving during the operation, and ensures the accuracy and stability of the osteotomy process.

[0018] Optionally, one end of the osteotomy guide channel is provided with a positioning hole, and the positioning hole is used to guide the hollow nail to carry the wire saw into the gap between the lumbar vertebrae and the sacrum.

[0019] By adopting the technical scheme, the positioning hole can accurately guide the hollow nail to carry the wire saw into the gap between the lumbar vertebrae and the sacrum, ensuring that the wire saw accurately reaches the predetermined position. By guiding the hollow nail through the positioning hole, the potential risk of damage to the surrounding nerves and other important structures during the operation can be reduced, and the safety of the operation can be improved. 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 operation efficiency.

[0020] In a second aspect, the application provides an operation method for precisely guiding an osteotomy instrument to the middle sacral suture, which adopts the following technical scheme:

[0021] An operation method for precisely guiding an osteotomy instrument to the middle sacral suture, comprising the following steps:

[0022] S1, anatomizing the patient from the posterior approach;

[0023] S2, precisely anatomizing the detailed feature surface area of the patient's pelvis, and using bone forceps to preliminarily process part of the sacral spine process area;

[0024] S3, cooperating the positioning plate with the detailed feature surface area of the patient's pelvis, and fixing the positioning plate by using the Kirschner wire;

[0025] S4, using the ultrasonic fixation wave assisted bone forceps to perform osteotomy on part of the sacral spine process;

[0026] S5, using a swing saw or an ultrasonic bone knife to extend into the osteotomy guide channel to perform osteotomy, and if the positioning hole is provided, a hollow nail can be driven into the positioning hole to guide the wire saw to the gap between the sacrum and the lumbar intervertebral disc to perform osteotomy;

[0027] S6, after the osteotomy is completed, the installation of the prosthesis, the processing of the soft tissue, and the final suture processing are completed according to the conventional operation.

[0028] By adopting the technical scheme, since the middle sacral joint exists in the sacral canal, the positioning surface is damaged during the osteotomy, the osteotomy instrument is precisely guided to the middle sacral joint, the position of the instrument is not changed during the operation, and the precision of the osteotomy during the whole operation is ensured. During the installation process, only a few kirschner wires are needed to complete the fixation, the operation time is reduced, the time of intraoperative anatomical exposure of the patient is reduced, the risk of infection is reduced, and the success rate of the operation is improved. Meanwhile, after the installation of the instrument, various tools can be used for osteotomy, the surgeon can perform osteotomy according to the use habit, and the osteotomy efficiency is greatly improved.

[0029] To sum up, the present application has at least one of the following beneficial technical effects:

[0030] 1. By three-dimensional reconstruction of the CT data of the patient, the positioning plate is perfectly matched with the detailed feature surface area of the patient's pelvis, so as to realize precise positioning and reduce the uncertainty and error in the operation;

[0031] 2. By arranging a plurality of needle insertion holes on the ipsilateral posterior superior iliac spine positioning plate and the contralateral sacral 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;

[0032] 3. The osteotomy guide channel can accommodate various osteotomy tools such as a swing saw, an ultrasonic bone knife and a wire saw, the surgeon can select appropriate tools for osteotomy according to the actual situation, and the flexibility and efficiency of the operation are improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structure diagram of the precise osteotomy instrument for the middle sacral joint provided by the embodiment of the present application.

[0034] Figure 2 is a color model diagram of the precise osteotomy instrument for the middle sacral joint provided by the embodiment of the present application.

[0035] Marked with 1- lumbar spine spinous process positioning plate; 2- ipsilateral posterior superior iliac spine positioning plate; 3- contralateral sacral spinous process positioning plate; 4- contralateral sacral positioning plate; 5- osteotomy guide; 501- osteotomy guide channel; 502- positioning hole; 6- ipsilateral first connecting column; 7- ipsilateral second connecting column; 8- contralateral connecting column; 9- needle insertion hole; 10- kirschner wire; 11- lumbar vertebra; 12- ipsilateral ilium; 13- ipsilateral sacrum; 14- contralateral ilium; 15- contralateral sacrum. DETAILED DESCRIPTION

[0036] The following will be described in detail in combination with the accompanying Figures 1-2 The present application will be further described in detail.

[0037] The embodiment of the present application discloses a precise guiding osteotomy instrument for the middle sacral joint.

[0038] As shown in Figure 1 and Figure 2 , the precise guiding osteotomy instrument for the middle sacral joint (hereinafter referred to as "the instrument", "the present instrument" or "the instrument") includes a positioning plate, an osteotomy guide 5 and a Kirschner wire 10. The patient's pelvic region includes lumbar vertebrae 11, a diseased side ilium 12, a diseased side sacrum 13, a healthy side ilium 14 and a healthy side sacrum 15.

[0039] 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 with the positioning plate, and the osteotomy guide 5 is provided with an osteotomy guide channel 501 extending in a straight line and penetrating through the osteotomy guide 5, which is used to guide a swing saw or an ultrasonic bone cutter; the Kirschner wire 10 is used to fix the positioning plate with the patient's pelvis.

[0040] The present instrument realizes precise osteotomy of the middle sacral joint, significantly improves the safety and accuracy of the operation. Through the precise cooperation of the positioning plate with the multiple feature surface areas of the patient's pelvis, the stability and accuracy of the osteotomy guide 5 during the operation are ensured, and the problem of easy displacement of the traditional osteotomy guide 5 is effectively avoided. The osteotomy guide channel 501 on the osteotomy guide 5 can accurately guide the swing saw or the ultrasonic bone cutter to perform osteotomy, thereby improving the operation efficiency. The use of the Kirschner wire 10 further enhances the fixing effect of the instrument, ensures that the osteotomy guide 5 does not move during the operation, and thus guarantees the accuracy and safety of the osteotomy. Overall, the present instrument not only improves the success rate of the operation, but also reduces the operation time and the risk of patient exposure during the operation, and reduces the probability of postoperative complications.

[0041] As shown in Figure 1 and Figure 2 , specifically, the detailed feature surface area of the pelvis includes the lumbar spine spinous process area, the diseased side posterior superior iliac spine area, the healthy side sacral spine process area and the healthy side sacral area, the positioning plate includes a lumbar spine spinous process positioning plate 1, a diseased side posterior superior iliac spine positioning plate 2, a healthy side sacral spine process positioning plate 3 and a healthy side sacral positioning plate 4, the lumbar spine spinous process positioning plate 1 has a surface contour matched with the lumbar spine spinous process area, the diseased side posterior superior iliac spine positioning plate 2 has a surface contour matched with the diseased side posterior superior iliac spine area, the healthy side sacral spine process positioning plate 3 has a surface contour matched with the healthy side sacral spine process area, and the healthy side sacral positioning plate 4 has a surface contour matched with the healthy side sacral area.

[0042] The positioning plate adopts lumbar spine spinous process positioning plate 1, affected side posterior superior iliac spine positioning plate 2, healthy side sacrum spinous process positioning plate 3 and healthy side sacrum positioning plate 4, which are accurately matched with the lumbar spine spinous process region, the affected side posterior superior iliac spine region, the healthy side sacrum spinous process region and the healthy side sacrum region respectively, thereby significantly improving the accuracy and stability of positioning. The multi-region positioning strategy not only ensures the stable fixation of the osteotomy guide 5 during the operation process to prevent displacement, but also maintains the stability of the osteotomy guide 5 during the osteotomy operation, thereby ensuring the accuracy of the osteotomy operation.

[0043] As shown in Figure 1 and Figure 2 To ensure the relative fixation between the osteotomy guide 5 and the positioning plate, the lumbar spine spinous process positioning plate 1 is fixedly connected with 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 with the osteotomy guide 5 through the affected side second connecting column 7, the healthy side sacrum spinous process positioning plate 3 is integrally formed with the osteotomy guide 5, and the healthy side sacrum positioning plate 4 is fixedly connected with the healthy side sacrum spinous process positioning plate 3 through the healthy side connecting column 8.

[0044] The affected side first connecting column 6 and the affected side second connecting column 7 are arranged to effectively connect the lumbar spine spinous process positioning plate 1, the affected side posterior superior iliac spine positioning plate 2 and the osteotomy guide 5, so that the components cooperate with each other to improve the overall rigidity and stability of the osteotomy guide 5. The integrally formed design of the healthy side sacrum spinous process positioning plate 3 and the osteotomy guide 5 further enhances the firmness and accuracy of the structure. In addition, the arrangement of the healthy side connecting column 8 enables the firm connection of the healthy side sacrum positioning plate 4 and the healthy side sacrum spinous process positioning plate 3, thereby increasing the reliability and safety of the entire instrument. These designs collectively improve the accuracy and safety of the operation, reduce the operation time and risk.

[0045] As shown in Figure 1 and Figure 2 To ensure the relative fixation between the positioning plate and the patient's pelvis, a plurality of needle insertion holes 9 are arranged on the affected side posterior superior iliac spine positioning plate 2 and the healthy side sacrum positioning plate 4, wherein the number of the needle insertion holes 9 on the affected side posterior superior iliac spine positioning plate 2 is at least two, the number of the needle insertion holes 9 on the healthy side sacrum positioning plate 4 is at least two, and the total number of the needle insertion holes 9 is not less than five. The needle insertion holes 9 are used to guide Kirschner wires 10. The arrangement of the plurality of needle insertion holes 9 on the affected side posterior superior iliac spine positioning plate 2 and the healthy side sacrum positioning plate 4 ensures that the number of Kirschner wires 10 is sufficient to effectively fix the positioning plate and prevent displacement during the operation process, thereby ensuring the accuracy and stability of the osteotomy. The Kirschner wires 10 can ensure the firm fixation of the positioning plate and the patient's pelvis, further enhancing the stability and accuracy of the instrument, preventing displacement during the osteotomy process, and thereby improving the safety and success rate of the operation. The number of the needle insertion holes 9 can also adapt to the specific conditions of different patients, and at least five needle insertion holes 9 can ensure stability, thereby reducing the time for inserting Kirschner wires 10 during the operation.

[0046] As shown in Figure 1 and Figure 2 To ensure the stability of the Kirschner wire 10, its length should not be less than 1.5 cm to ensure that the Kirschner wire 10 can firmly fix the positioning plate to the patient's pelvis, preventing the guide plate from moving during the operation, thereby ensuring the accuracy and stability of the osteotomy process.

[0047] As shown in Figure 1 and Figure 2 At one end of the osteotomy guide channel 501, a positioning hole 502 can be provided, which is designed to guide the hollow nail and the wire saw into the gap between the lumbar vertebrae 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 vertebrae 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 injury to the surrounding 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 process of placing the wire saw, shortens the operation time, and reduces the complexity of the operation, thereby improving the efficiency of the operation.

[0048] The application also discloses an operation method of the sacral midline precise osteotomy instrument.

[0049] The operation method of the sacral midline precise osteotomy instrument includes the following steps:

[0050] S1, anatomize the patient from the posterior approach;

[0051] S2, precisely anatomize the detailed feature surface area of the patient's pelvis, and use bone forceps to preliminarily process part of the sacral spine process area;

[0052] S3, cooperate the positioning plate with the detailed feature surface area of the patient's pelvis, and fix the positioning plate by using the Kirschner wire 10;

[0053] S4, use the ultrasonic fixation wave assisted bone forceps to perform osteotomy on part of the sacral spine process;

[0054] S5, use the swing saw or ultrasonic bone knife to extend into the osteotomy guide channel 501 to perform osteotomy, and if the positioning hole 502 is provided, the hollow nail can be used to punch into the positioning hole 502, and the wire saw can be guided from the hollow nail to the gap between the sacrum and the intervertebral disc of the lumbar vertebrae 11 to perform osteotomy;

[0055] S6, after the osteotomy is completed, install the prosthesis, process the soft tissue, and finally perform the suture process according to the conventional operation.

[0056] The implementation principle of the operation method of the precise guiding osteotomy instrument for the sacral median fissure is that due to the existence of the sacral median fissure spinal canal, the positioning surface is damaged during osteotomy, and the osteotomy operation is performed by using the precise guiding osteotomy instrument for the sacral median fissure, so that the position of the instrument is not changed due to the osteotomy operation during the operation process, and the osteotomy precision in the whole operation process can be ensured. During the installation process of the instrument, only a few kirschner wires 10 are needed to complete the fixation, the operation time can be reduced, the time of intraoperative anatomical exposure of the patient can be reduced, the risk of infection can be reduced, and the success rate of the operation can be improved. Meanwhile, after the installation of the instrument, various tools can be used for osteotomy, and the surgeon can perform osteotomy processing according to the use habit, and the osteotomy efficiency can be greatly improved by the cooperation of various osteotomy methods.

[0057] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A precise guided osteotomy instrument for the sacral suture, characterized in that: include: A positioning plate, the positioning plate is used to cooperate with the patient's pelvic detailed feature surface area, the pelvic detailed feature surface area includes the lumbar spinous process area, the ipsilateral posterior superior iliac spine area, the healthy side sacral spinous process area and the healthy side sacral area, the positioning plate includes a lumbar spinous process positioning plate (1), an ipsilateral 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 cooperates with the lumbar spinous process area, the ipsilateral posterior superior iliac spine positioning plate (2) has a surface contour that cooperates with the ipsilateral posterior superior iliac spine area, the healthy side sacral spinous process positioning plate (3) has a surface contour that cooperates with the healthy side sacral spinous process area, and the healthy side sacral positioning plate (4) has a surface contour that cooperates with the healthy side sacral area; An osteotomy guide (5) is fixedly connected to the positioning plate. The osteotomy guide (5) is provided with an osteotomy guide channel (501) extending in a straight line and passing through the osteotomy guide (5). The osteotomy guide channel (501) is used to guide an oscillating saw or an ultrasonic bone knife. The lumbar spinous process positioning plate (1) is fixedly connected to the posterior superior iliac spine positioning plate (2) on the affected side through the first connecting column (6) on the affected side. The posterior superior iliac spine positioning plate (2) on the affected side is fixedly connected to the osteotomy guide (5) through the second connecting column (7) on the affected side. The healthy side sacral spinous process positioning plate (3) is integrally formed with the osteotomy guide (5). The healthy side sacral spinous process positioning plate (4) is fixedly connected to the healthy side sacral spinous process positioning plate (3) through the healthy side connecting column (8). 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 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).

3. The precise guided osteotomy instrument for the sacral suture according to claim 2, 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.

4. The precise guided osteotomy instrument for the sacral suture according to claim 3, characterized in that: The length of the Kirschner wire (10) is not less than 1.5 cm.

5. 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 into the space between the lumbar vertebra (11) and the sacrum.

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