A precise osteotomy guide

Abstract

The present invention provides a precise osteotomy guide, comprising: a frame having a main rod, a first support rod slidably mounted on the main rod, and a second support rod fixedly connected to one end of the main rod, wherein the first support rod and the second support rod are parallel to the main rod to form a U-shaped structure; a positioning structure, arranged on the first support rod, suitable for positioning on one side of the fibula; a first position determining member, installed on the first support rod, used to determine the distance between the center of the positioning structure and the tibial plateau; a guiding structure, arranged on the second support rod, used to guide the insertion direction of the Kirschner wire toward the center of the positioning structure; a second position determining member, installed on the second support rod, used to determine the distance between the center of the guide hole of the guiding structure for guiding the Kirschner wire and the tibial plateau. The precise osteotomy guide of the present invention can accurately give the osteotomy position of the outer and inner sides of the tibial plateau, can ensure that the insertion direction of the Kirschner wire is accurate, reduce or avoid deflection, and improve the efficiency of osteotomy.

Description

Technical Field

[0001] The invention relates to the technical field of auxiliary tools for orthopedic osteotomy, and in particular to a precise osteotomy guide. Background Art

[0002] Patients with genu varum, especially young patients with genu varum due to proximal tibial dysplasia, need to undergo proximal tibial high osteotomy for simple medial knee pain. The treatment mechanism of proximal tibial high osteotomy is to transfer the weight-bearing line from the inflamed and worn medial compartment of the knee joint to the relatively normal lateral compartment through proximal tibial osteotomy, thereby achieving the purpose of relieving arthritis symptoms.

[0003] Specifically, the normal force line of the knee joint usually has more weight on the medial side and less weight on the lateral side. If there is a certain degree of varus deformity of the tibia, the pressure on the medial compartment cartilage will increase significantly and exceed the tolerance of the cartilage, thus triggering a vicious cycle of cartilage wear and inflammation, forming medial osteoarthritis. Before osteoarthritis develops to the lateral side, high proximal tibial osteotomy can correct the varus deformity of the tibia and appropriately transfer the force line of the lower limb to the normal lateral compartment, thereby significantly reducing the pressure in the medial compartment and restoring it to the normal range that the cartilage can withstand, thereby effectively preventing cartilage wear, relieving pain symptoms, and even allowing the worn cartilage and injured meniscus to self-repair.

[0004] Corrective surgery for proximal high tibial osteotomy requires open osteotomy on the medial side of the tibia to correct the varus angle of the proximal tibia, thereby correcting the weight-bearing line of the entire lower limb. The traditional surgical method is to insert a Kirschner wire from the first osteotomy position on the medial side of the proximal tibia (about 3.5 cm below the tibial plateau) toward the fibular head, then perform osteotomy close to the Kirschner wire, and then perform distraction in the osteotomy area to correct the angle between the proximal tibial articular surface and the tibial force line. According to relevant surgical requirements, starting from the first osteotomy position on the inner side of the proximal tibia, the osteotomy should be carried out to the second osteotomy position on the outer side of the proximal tibia opposite thereto, and the second osteotomy position is preferably about 1.5 cm away from the tibial plateau; generally speaking, the osteotomy is carried out with reference to the fibular head (i.e., the osteotomy is carried out from the first osteotomy position on the inner side of the proximal tibia toward the fibular head), and the position reached by the osteotomy is basically within the above distance (about 1.5 cm). However, there are still a large number of patients whose fibular head is too close or too far from the tibial plateau. After the osteotomy, the distance between the second osteotomy position and the tibial plateau is too small or too large, and the osteotomy quality is poor, which can easily lead to complications such as abnormal fractures of the proximal tibia; in addition, the traditional osteotomy method does not have tools to assist in guiding when inserting the Kirschner wire, so it is easy to deviate, and fluoroscopy is required after insertion. Once deflection occurs, it must be corrected, resulting in long operation time and great trauma. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the technical defect in the prior art that when performing proximal high tibial osteotomy orthopedic surgery, there is no special tool and the osteotomy is generally performed directly with reference to the fibular head, resulting in the osteotomy position being not accurate enough, thereby providing a precise osteotomy guide that can improve the accuracy of osteotomy.

[0006] To this end, the present invention provides a precise osteotomy guide, comprising:

[0007] The frame comprises a main rod, a first support rod slidably mounted on the main rod, and a second support rod fixedly connected to one end of the main rod, wherein the first support rod is parallel to the second support rod and forms a U-shaped structure together with the main rod;

[0008] A positioning structure, disposed on the first support rod, suitable for positioning on one side of the fibula;

[0009] A first position determining member, mounted on the first support rod, for determining the distance between the center of the positioning structure and the tibial plateau;

[0010] A guide structure, disposed on the second support rod, for guiding the insertion direction of the Kirschner wire toward the center of the positioning structure;

[0011] The second position determining member is mounted on the second support rod and is used to determine the distance between the center of the guide hole of the guide structure for guiding the Kirschner wire and the tibial plateau.

[0012] As a preferred solution, the positioning structure is a positioning bowl, which is installed on the side of the first support rod facing the second support rod through a positioning mounting column.

[0013] As a preferred embodiment, the positioning bowl is coaxially arranged with the positioning mounting column; the first position determining member is sleeved on the positioning mounting column, and has a first indicator rod extending toward the direction of the second support rod, and the distance between the first indicator rod and the center of the positioning mounting column is a set distance.

[0014] As a preferred solution, it further comprises a second indicator rod, which is arranged on the outer side of the first indicator rod, and the interval between the second indicator rod and the first indicator rod is 0.5 cm.

[0015] As a preferred solution, the guide structure includes:

[0016] A first guide sleeve, disposed on the second support rod, having a first central guide hole, wherein the central axis of the first central guide hole passes through the central position of the positioning structure;

[0017] A positioning column is rotatably sleeved on the first guide sleeve, and the positioning column is provided with a plurality of through holes;

[0018] The second guide sleeve is detachably mounted inside one of the through holes and has a second central guide hole, wherein the central axis of the second central guide hole is parallel to the central axis of the first central guide hole.

[0019] As a preferred solution, the second position determining member comprises a base, one end of the base forms a U-shaped structure, two opposite sides of the U-shaped structure have base mounting holes for the positioning column to be rotatably inserted; the other end is provided with a connecting rod, the connecting rod is bent toward the position of the tibial plateau;

[0020] The central axis of the first central guide hole and the central axis of the second central guide hole determine an osteotomy reference plane;

[0021] The distance between the top end of the connecting rod and the osteotomy reference surface is a set distance.

[0022] As a preferred solution, an insert plate is provided at the top end of the connecting rod, and the insert plate is parallel to the osteotomy reference surface.

[0023] As a preferred solution, the insertion plate is provided with a plurality of insertion guide holes, and the central axes of the plurality of insertion guide holes are parallel and coplanar, and are parallel to the osteotomy reference surface.

[0024] As a preferred solution, the main rod is a polygonal prism structure, and the first support rod can move along the axial direction of the main rod but cannot rotate around the circumference of the main rod.

[0025] As a preferred solution, the main rod is provided with a scale, and the 0 scale position of the scale is flush with the end of the first guide sleeve facing the positioning structure; the scale increases from the 0 scale position toward the direction close to the first support rod.

[0026] The technical solution provided by the present invention has the following advantages:

[0027] 1. The precise osteotomy guide of the present invention comprises a frame, a positioning structure, a first position determining member, a guiding structure and a second position determining member, wherein the positioning structure and the guiding structure are respectively arranged on the first support rod and the second support rod of the frame, the first position determining member can determine the positioning position of the positioning structure (such as about 1.5 cm below the outer side of the tibial plateau), the second position determining member can determine the positioning position of the guiding structure (such as about 3.5 cm below the inner side of the tibial plateau), and the guiding structure can guide the insertion direction of the Kirschner wire to be toward the center of the positioning structure. In this way, the precise osteotomy guide of the present invention can not only accurately give the osteotomy position of the outer and inner sides of the tibial plateau, overcoming the problem of inaccurate osteotomy position caused by relying solely on the fibular head in the traditional method, but also can ensure that the insertion direction of the Kirschner wire is accurate, reduce or avoid deflection, improve the insertion efficiency of the Kirschner wire, and thus improve the osteotomy efficiency.

[0028] 2. The positioning structure of the precise osteotomy guide of the present invention is a positioning bowl, which is installed on the side of the first support rod facing the second support rod through a positioning mounting column; when the precise osteotomy guide of the present invention is used, the positioning bowl can be first buckled on the fibular head to see whether the corresponding indicator mark is exactly flush with the tibial plateau. If it is flush, the next step of inserting the Kirschner wire can be directly performed. If it is not flush, the position of the positioning bowl needs to be adjusted until the corresponding indicator mark is flush with the tibial plateau, without buckling the positioning bowl on the fibular head.

[0029] 3. The precise osteotomy guide of the present invention has a first position determining member sleeve mounted on the positioning mounting column, and the distance between the first indicator rod and the center of the positioning mounting column is a set distance (e.g., 1.5 cm). Thus, when the positioning bowl is buckled on the fibular head, it is observed whether the indicated position of the first indicator rod is flush with the tibial platform to know whether the positioning bowl is in the correct position, thereby making adaptive up and down position adjustments.

[0030] 4. The precise osteotomy guide of the present invention further includes a second indicator rod, which is arranged on the outside of the first indicator rod. The interval between the second indicator rod and the first indicator rod is 0.5 cm. The second indicator rod can provide a distance reference for the doctor.

[0031] 5. The precise osteotomy guide of the present invention has a guide structure including a first guide sleeve, a positioning column and a second guide sleeve. After the osteotomy position is determined, the positioning position of the positioning structure is determined by the first position determining member, and the positioning position of the guide structure is determined by the second position determining member. The first guide sleeve and the second guide sleeve are used to define the insertion position and insertion direction of the Kirschner wire, so that no deflection occurs, and high-quality osteotomy is completed at one time as much as possible, thereby improving the surgical efficiency. The first guide sleeve, the second guide sleeve and the positioning column cooperate with each other to ensure that the two Kirschner wires are parallel after the insertion, so that the oscillating saw can be close to the two Kirschner wires for osteotomy.

[0032] The positioning column is rotatably mounted on the first guide sleeve, and the position of the second guide sleeve can be adjusted so that the osteotomy reference surface determined by the central axis of the first central guide hole and the central axis of the second central guide hole is consistent with the posterior tilt of the tibial plateau.

[0033] 6. The precise osteotomy guide of the present invention, the second position determining member includes a base, one end of the base forms a U-shaped structure, which can be rotatably mounted on the positioning column, and the other end is provided with a connecting rod, which is bent toward the tibial plateau, and the distance between the top of the connecting rod and the above-mentioned osteotomy reference surface is a set distance. In this way, after the guide structure is pressed against the inner side of the tibia, the position of the top of the connecting rod can be observed to know whether the position of the guide structure is too high or too low, which is convenient for adjustment, and the position of the second guide sleeve can be roughly determined (when the top of the connecting rod is closest to the tibial plateau, the position of the second guide sleeve can be roughly determined).

[0034] 7. The precise osteotomy guide of the present invention has an insertion plate at the top of the connecting rod, and the insertion plate is arranged parallel to the osteotomy reference surface; since the osteotomy surface is required to be the same as the posterior tilt angle of the tibial plateau during osteotomy, the above-mentioned insertion plate is arranged so that the insertion plate can be inserted into the tibial plateau position during osteotomy, and the insertion plate and the tibial plateau have the same posterior tilt angle, thereby ensuring that the first guide sleeve and the second guide sleeve guide the Kirschner wire at the same posterior tilt angle, thereby ensuring that the bone plane cut close to the Kirschner wire is also the same as the posterior tilt angle. Furthermore, the insertion plate is provided with a plurality of insertion guide holes. Due to the influence of the joint capsule and ligaments at the medial tibial plateau position, the insertion of the insertion plate is relatively difficult. At this time, the insertion plate can be fixed by inserting at least two Kirschner wires at the insertion guide hole position of the insertion plate, and the inclination angle of the insertion plate is made the same as the posterior tilt angle of the tibial plateau, thereby reducing the difficulty of inserting the insertion plate.

[0035] 8. The precise osteotomy guide of the present invention has a main rod of a multi-prism structure, and the first support rod can only move along the axial direction of the main rod but cannot rotate around the circumference of the main rod. With this arrangement, the positioning structure can only move back and forth in the direction of approaching or moving away from the first guide sleeve. During the movement, the positioning structure is always opposite to the first guide sleeve, thereby improving the adjustment efficiency.

[0036] 9. The precise osteotomy guide of the present invention has a scale on the main rod, and the 0 scale position is flush with the end of the first guide sleeve facing the positioning structure; when inserting the Kirschner wire, a Kirschner wire with a scale can be used. By observing the scale on the inserted Kirschner wire, the approximate position of the Kirschner wire can be known to avoid penetrating the tibia. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the prior art or the specific implementation manner of the present invention, the drawings used in the description of the prior art or the specific implementation manner are briefly introduced below.

[0038] Figure 1 It is a schematic diagram of the overall structure of the precise osteotomy guide of the present invention.

[0039] Figure 2 yes Figure 1 Another stereoscopic view of .

[0040] Figure 3 yes Figure 1 Improved structural diagram of the second position determining component.

[0041] Figure 4 It is a schematic diagram of the application of the precise osteotomy guide of the present invention.

[0042] Figure numerals: 1. frame; 10. main rod; 11. first support rod; 12. second support rod; 2. positioning bowl; 21. positioning mounting column; 3. first position determining member; 31. first indicator rod; 32. second indicator rod; 41. first guide sleeve; 410. first center guide hole; 42. second guide sleeve; 420. second center guide hole; 43. positioning column; 430. through hole; 5. base; 50. base mounting hole; 51. side; 52. connecting rod; 53. insertion plate; 54. insertion guide hole. DETAILED DESCRIPTION

[0043] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings.

[0044] Example

[0045] This embodiment provides a precise osteotomy guide. Figure 1-2 As shown, it includes: a frame 1, which has a main rod 10, a first support rod 11 slidably mounted on the main rod 10, and a second support rod 12 fixedly connected to one end of the main rod 10, the first support rod 11 is parallel to the second support rod 12, and together with the main rod 10 forms a U-shaped structure; a positioning structure, which is arranged on the first support rod 11 and is suitable for positioning on one side of the fibula; a first position determining member 3, which is installed on the first support rod 11 and is used to determine the distance between the center of the positioning structure and the tibial plateau; a guide structure, which is arranged on the second support rod 12 and is used to guide the insertion direction of the Kirschner wire to the center of the positioning structure; a second position determining member, which is installed on the second support rod 12 and is used to determine the distance between the center of the guide hole of the guide structure for guiding the Kirschner wire and the tibial plateau.

[0046] The precise osteotomy guide of the present embodiment, the positioning structure and the guiding structure are respectively arranged on the first support rod 11 and the second support rod 12 of the frame 1, the first position determining member 3 can determine the positioning position of the positioning structure (such as about 1.5 cm below the outer side of the tibial plateau), the second position determining member can determine the positioning position of the guiding structure (such as about 3.5 cm below the inner side of the tibial plateau), and the guiding structure can guide the insertion direction of the Kirschner wire to be toward the center of the positioning structure. In this way, the precise osteotomy guide of the present embodiment can not only accurately give the osteotomy position of the outer and inner sides of the tibial plateau, overcoming the problem of inaccurate osteotomy position caused by relying solely on the head of the fibula in the traditional method, but also can ensure that the insertion direction of the Kirschner wire is accurate, reduce or avoid deflection, improve the insertion efficiency of the Kirschner wire, and thus improve the osteotomy efficiency.

[0047] In this embodiment, the positioning structure is a positioning bowl 2 , which is installed on the side of the first support rod 11 facing the second support rod 12 through a positioning installation column 21 .

[0048] When using the precise osteotomy guide of this embodiment, the positioning bowl 2 can be first buckled onto the head of the fibula, and then the position of the first position determining member 3 can be checked to see whether its corresponding indicator mark is exactly flush with the tibial plateau. If so, the next step of inserting the Kirschner wire can be directly performed. If not, the position of the positioning bowl 2 needs to be adjusted so that the position of the first position determining member 3 is flush with the tibial plateau without the need to mechanically buckle the positioning bowl onto the head of the fibula.

[0049] The positioning bowl 2 is coaxially arranged with the positioning mounting post 21; the first position determining member 3 is sleeved on the positioning mounting post 21 and has a first indicating rod 31 extending toward the second support rod 12, and the distance between the first indicating rod 31 and the center of the positioning mounting post 21 is a set distance (e.g., 1.5 cm). In this way, when the positioning bowl 2 is buckled on the fibular head, it is observed whether the indicated position of the first indicating rod 31 is flush with the tibial plateau, so that the positioning bowl 2 can be known whether it is in the correct position, thereby making adaptive up and down position adjustments.

[0050] The device further comprises a second indicator rod 32 which is arranged on the outer side of the first indicator rod 31 . The interval between the second indicator rod 32 and the first indicator rod 31 is 0.5 cm, so as to provide a distance reference for the doctor.

[0051] The guide structure includes: a first guide sleeve 41, which is arranged on the second support rod 12 and has a first center guide hole 410, and the center axis of the first center guide hole 410 passes through the center position of the positioning structure; a positioning column 43, which is rotatably sleeved on the first guide sleeve 41, and the positioning column 43 is provided with a plurality of through holes 430; a second guide sleeve 42, which is detachably installed in one of the through holes 430, and has a second center guide hole 420, and the center axis of the second center guide hole 420 is parallel to the center axis of the first center guide hole 410.

[0052] After the osteotomy position is determined, the positioning position of the positioning structure is determined by the first position determining member 3, and the positioning position of the guide structure is determined by the second position determining member. The first guide sleeve 41 and the second guide sleeve 42 are used to limit the insertion position and insertion direction of the Kirschner wire, so that no deviation occurs, and high-quality osteotomy can be completed in one time as much as possible, thereby improving the surgical efficiency. The first guide sleeve 41, the second guide sleeve 42 and the positioning column 43 cooperate with each other to ensure that the two Kirschner wires are parallel after the needles are inserted, so that the oscillating saw can be close to the two Kirschner wires for osteotomy.

[0053] The positioning column 43 is rotatably mounted on the first guide sleeve 41, and the position of the second guide sleeve 42 can be adjusted so that the osteotomy reference surface determined by the central axis of the first central guide hole 410 and the central axis of the second central guide hole 420 is consistent with the posterior tilt of the tibial plateau.

[0054] The second position determining member includes a base 5, one end of which forms a U-shaped structure, and two opposite sides 51 of the U-shaped structure have base mounting holes 50 for the positioning column 43 to be rotatably inserted; the other end is provided with a connecting rod 52, and the connecting rod 52 is bent toward the position of the tibial plateau; the central axis of the first center guide hole 410 and the central axis of the second center guide hole 420 determine the osteotomy reference surface; the distance between the top end of the connecting rod 52 and the osteotomy reference surface is a set distance. In this way, after the guide structure is pressed against the inner side of the tibia, the position of the top end of the connecting rod 52 can be observed to know whether the position pressed by the guide structure is too high or too low, which is convenient for adjustment, and the position of the second guide sleeve 42 can be roughly determined (when the top end of the connecting rod 52 is closest to the position of the tibial plateau, the position of the second guide sleeve 42 can be roughly determined).

[0055] An insertion plate 53 is provided at the top of the connecting rod 52, and the insertion plate 53 is parallel to the osteotomy reference surface. Since the osteotomy surface is required to be the same as the posterior tilt angle of the tibial plateau during osteotomy, the above-mentioned insertion plate 53 is set so that the insertion plate 53 can be inserted into the tibial plateau during osteotomy, and the insertion plate 53 is the same as the posterior tilt angle of the tibial plateau, thereby ensuring that the first guide sleeve 41 and the second guide sleeve 42 guide the Kirschner wire at the same posterior tilt angle, thereby ensuring that the bone plane cut close to the Kirschner wire is also the same as the posterior tilt angle. Further, a plurality of insertion guide holes 54 are provided on the insertion plate 53. Due to the influence of the joint capsule and ligament at the medial tibial plateau, the insertion of the insertion plate 53 is relatively difficult. At this time, the insertion plate 53 can be fixed by inserting at least two Kirschner wires at the insertion guide holes 54 of the insertion plate 53, and the inclination angle of the insertion plate 53 is the same as the posterior tilt angle of the tibial plateau, thereby reducing the difficulty of inserting the insertion plate 53.

[0056] The first guide sleeve 41 is located inside the U-shaped structure, and all the through holes 430 are located outside the U-shaped structure, so that the entire guide structure is compact, the second guide sleeve 42 is easy to disassemble, and the connecting rod 52 is located in the center, which is convenient for comparison of the comparison end.

[0057] The main rod 10 is a polygonal prism structure, and the first support rod 11 can move along the axial direction of the main rod 10, but cannot rotate around the circumference of the main rod 10. In this way, the positioning structure can only move back and forth in the direction of approaching or moving away from the first guide sleeve 41. During the movement, the positioning structure is always opposite to the first guide sleeve 41, thereby improving the adjustment efficiency.

[0058] The main rod 10 is provided with a scale, and the 0 scale position of the scale is flush with the end of the first guide sleeve 41 facing the positioning structure; the scale increases from the 0 scale position toward the direction close to the first support rod 11. When nailing the Kirschner wire, a Kirschner wire with a scale can be used. By observing the scale on the inserted Kirschner wire, the approximate position of the Kirschner wire can be known to avoid penetrating the tibia. In addition, it can also be set that when the Kirschner wire is inserted into the first guide sleeve 41 or the second guide sleeve 42 until the tip is flush with the 0 scale, the position of the Kirschner wire at the other end of the first guide sleeve 41 or the second guide sleeve 42 that is just not inserted is the 0 scale, and then the scale value increases in the direction away from the first guide sleeve 41 or the second guide sleeve 42, so that when the Kirschner wire is nailed in, the insertion depth of the Kirschner wire can be more conveniently known.

[0059] The method of using the precise osteotomy guide in this embodiment is as follows:

[0060] refer to Figure 1-4As shown, the precise osteotomy guide of this embodiment is placed on the tibia to be cut, the position of the positioning structure is determined by the first position determining member 3, and the positioning position of the guide structure is determined by the second position determining member. Specifically, the first indicator rod 31 is adjusted to be flush with the tibial plateau on the outside of the tibia, thereby determining the position of the positioning bowl 2; the base 5 is adjusted to make the position of the insertion plate 53 flush with the tibial plateau on the inside of the tibia, thereby determining the position of the first guide sleeve 41, insert at least two Kirschner wires into the insertion guide hole 54 of the insertion plate 53, fix the insertion plate 53 and make the inclination angle of the insertion plate consistent with the posterior inclination angle of the tibial plateau, thereby determining the position of the second guide sleeve 42; the two Kirschner wires are nailed in through the first guide sleeve 41 and the second guide sleeve 42 respectively, and the guide is removed after completion, and the osteotomy is performed using an oscillating saw close to the two Kirschner wires until the opposite side is reached, and it cannot be completely cut off, retaining the unilateral cortex to form a hinge, so that the osteotomy can heal as soon as possible.

[0061] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A precise osteotomy guide, characterized in that: include: A frame (1) comprises a main rod (10), a first support rod (11) slidably mounted on the main rod (10), and a second support rod (12) fixedly connected to one end of the main rod (10), wherein the first support rod (11) is parallel to the second support rod (12) and forms a U-shaped structure together with the main rod (10); a positioning structure, arranged on the first support rod (11), suitable for being positioned on one side of the fibula; the positioning structure is a positioning bowl (2), which is mounted on the side of the first support rod (11) facing the second support rod (12) via a positioning mounting column (21); A first position determining member (3) mounted on the first support rod (11) and used to determine the distance between the center of the positioning structure and the tibial plateau; A guide structure, arranged on the second support rod (12), for guiding the insertion direction of the Kirschner wire towards the center of the positioning structure; the guide structure comprises: a first guide sleeve (41), arranged on the second support rod (12), having a first central guide hole (410), the central axis of the first central guide hole (410) passing through the central position of the positioning structure; a positioning column (43), rotatably sleeved on the first guide sleeve (41), the positioning column (43) having a plurality of through holes (430); a second guide sleeve (42), detachably mounted inside one of the through holes (430), having a second central guide hole (420), the central axis of the second central guide hole (420) being parallel to the central axis of the first central guide hole (410); A second position determining member is mounted on the second support rod (12) and is used to determine the distance between the center of the guide hole of the guide structure for guiding the Kirschner wire and the tibial plateau; the second position determining member comprises a base (5), one end of the base (5) forms a U-shaped structure, two opposite side surfaces (51) of the U-shaped structure have base mounting holes (50) for rotatably inserting the positioning column (43); the other end is provided with a connecting rod (52), the connecting rod (52) is bent toward the position of the tibial plateau; the central axis of the first central guide hole (410) and the central axis of the second central guide hole (420) determine an osteotomy reference surface; the distance between the top end of the connecting rod (52) and the osteotomy reference surface is a set distance; the top end of the connecting rod (52) is provided with an insertion plate (53), the insertion plate (53) is parallel to the osteotomy reference surface.

2. The precise osteotomy guide according to claim 1, characterized in that: The positioning bowl (2) is coaxially arranged with the positioning mounting column (21); the first position determining member (3) is sleeved on the positioning mounting column (21) and has a first indicating rod (31) extending in the direction of the second support rod (12); the distance between the first indicating rod (31) and the center of the positioning mounting column (21) is a set distance.

3. The precise osteotomy guide according to claim 2, characterized in that: It also comprises a second indicator rod (32) which is arranged on the outside of the first indicator rod (31), and the distance between the second indicator rod (32) and the first indicator rod (31) is 0.5 cm.

4. The precise osteotomy guide according to claim 1, characterized in that: The insertion plate (53) is provided with a plurality of insertion guide holes (54), and the central axes of the plurality of insertion guide holes (54) are parallel and coplanar, and are parallel to the osteotomy reference surface.

5. The precise osteotomy guide according to claim 1, characterized in that: The main rod (10) is a polygonal prism structure, and the first support rod (11) can move along the axial direction of the main rod (10), but cannot rotate around the circumference of the main rod (10).

6. The precise osteotomy guide according to claim 1, characterized in that: The main rod (10) is provided with a scale, wherein the 0 scale position of the scale is flush with the end of the first guide sleeve (41) facing the positioning structure; and the scale increases from the 0 scale position towards the direction close to the first support rod (11).

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