Guide plate for middle foot osteotomy operation and middle foot osteotomy auxiliary device

Abstract

The utility model relates to the technical field of middle foot osteotomy operation tools, and particularly discloses a guide plate for a middle foot osteotomy operation and a middle foot osteotomy auxiliary tool. The guide plate comprises a guide plate body which is used for being buckled on a middle foot bone structure, a middle foot near-end osteotomy guide groove and a middle foot far-end osteotomy guide groove are formed in the guide plate body, and osteotomy surfaces where the middle foot near-end osteotomy guide groove and the middle foot far-end osteotomy guide groove are located intersect at a reset rotation axis; the reduction rotating axis is a connecting line of the first cuneiform bone in the middle foot bone structure and the lowest point of the midline of the dice bone; the positioning hole group is arranged on the guide plate body and is used for assisting in aligning the guide plate body and the middle foot bone structure; and the guide hole group is arranged on the guide plate body and is used for guiding the guide plate fixing needle to fix the guide plate on the middle foot bone structure. According to the guide plate, a doctor can be guided to accurately buckle the guide plate on a middle foot bone structure of a patient and complete two osteotomy operations of a middle foot osteotomy operation, the osteotomy precision is ensured, a wedge-shaped osteotomy intersecting line is formed, and therefore the operation effect is ensured.

Description

Technical Field

[0001] The present application generally relates to the technical field of midfoot osteotomy surgical tools, and more specifically, to a guide plate and a midfoot osteotomy auxiliary tool for midfoot osteotomy surgery. Background Art

[0002] High arches or varus feet are common complex foot skeletal deformities. High arches or varus feet are long-term pathological changes in bones and soft tissues that cause disorder in the skeletal structure of the foot. Due to the complex spatial position relationship of the skeletal structure of the foot, the difficulty of clinical surgical planning is greatly increased.

[0003] For this type of foot bone deformity, the main treatment method is midfoot osteotomy, which requires precise wedge-shaped osteotomy correction of each deformed bone in the midfoot, such as the cuneiform bone, cuboid bone, and accessory navicular bone, to correct the arch angle (i.e. the lateral angle between the first metatarsal bone and the talar axis) to within the range of ±4°.

[0004] At present, midfoot osteotomy surgery is mainly performed manually by doctors based on their clinical experience. The main steps include wedge osteotomy, rotational reduction and internal fixation locking. Wedge osteotomy includes two osteotomies. Since the midfoot bone structure is an irregular curved surface, the intersection line between the osteotomy surface and the upper surface of the bone structure is an irregular curve. Manually completing curved osteotomy is difficult to ensure osteotomy accuracy, and it is easy to have unequal osteotomy angles at different positions, and it is impossible to complete consistent angle correction.

[0005] In addition, since the direction of osteotomy is difficult to grasp, manual operation may result in a situation where no wedge-shaped osteotomy intersection line is formed after two osteotomies, that is, no clear reduction rotation axis is formed, resulting in failure to complete closed reduction.

[0006] In view of this, there is an urgent need to provide a midfoot osteotomy surgery plan, so as to provide a guide plate that can be used for midfoot osteotomy surgery to assist doctors in completing wedge osteotomy, ensure osteotomy accuracy and form a clear reduction rotation axis, thereby ensuring the surgical effect of midfoot osteotomy surgery. Utility Model Content

[0007] In order to at least solve one or more of the above-mentioned technical problems, the present application proposes a midfoot osteotomy surgery solution in multiple aspects.

[0008] In a first aspect, the present application provides a guide plate for midfoot osteotomy surgery, comprising: a guide plate body, which is used to buckle on the midfoot bone structure, and is provided with a proximal midfoot osteotomy guide groove and a distal midfoot osteotomy guide groove, the osteotomy surfaces where the proximal midfoot osteotomy guide groove and the distal midfoot osteotomy guide groove are located intersect at a reduction rotation axis, and the reduction rotation axis is a line connecting the lowest points of the midlines of the first cuneiform bone and the cuboid bone in the midfoot bone structure; a positioning hole group, which is provided on the guide plate body, for assisting in aligning the guide plate body with the midfoot bone structure; and a guide hole group, which is provided on the guide plate body, for guiding the guide plate fixing pin to fix the guide plate to the midfoot bone structure.

[0009] In some embodiments, the positioning hole group includes second cuneiform anchor positioning holes disposed on both sides of the proximal midfoot osteotomy guide groove and / or the distal midfoot osteotomy guide groove.

[0010] In some embodiments, the guide hole group includes a cuboid bone fixation guide hole, a second cuneiform bone fixation guide hole, and a first cuneiform bone fixation guide hole arranged along the length direction of the midfoot distal osteotomy guide groove, and the cuboid bone fixation guide hole, the second cuneiform bone fixation guide hole, and the first cuneiform bone fixation guide hole are arranged in sequence along the direction from the cuboid bone to the first cuneiform bone.

[0011] In some embodiments, the osteotomy surfaces where the proximal midfoot osteotomy guide groove and the distal midfoot osteotomy guide groove are located both intersect with the first cuneiform bone, the second cuneiform bone, the third cuneiform bone and the cuboid bone in the midfoot bone structure.

[0012] In some embodiments, the proximal midfoot osteotomy guide groove and the distal midfoot osteotomy guide groove are located between the talus and the first metatarsal, and the proximal midfoot osteotomy guide groove is arranged close to the talus, and the distal midfoot osteotomy guide groove is arranged close to the first metatarsal.

[0013] In some embodiments, the surface morphology of one side of the guide plate body that is buckled with the midfoot bone structure is consistent with the surface morphology of the midfoot bone structure formed by the midfoot cuneiform bone, the cuboid bone, and the accessory navicular bone.

[0014] In some embodiments, the guide plate further includes: an identification structure disposed on a side of the guide plate body facing away from the midfoot bone structure and presented in the form of protrusions, grooves and / or coatings, wherein the identification structure includes a distal pointing identification and / or a left and right indication identification.

[0015] In some embodiments, the material of the guide plate body is a transparent material.

[0016] In some embodiments, the guide plate body is a component manufactured by a 3D printing method.

[0017] In a second aspect, the present application provides a midfoot osteotomy auxiliary device including: a guide plate and a guide plate fixing pin, wherein the guide plate is a guide plate for midfoot osteotomy surgery as described in any one of the first aspects.

[0018] Through the guide plate for midfoot osteotomy surgery provided above, the embodiment of the present application can guide the doctor to accurately buckle and fix the guide plate on the patient's midfoot bone structure through the positioning hole group and the guide hole group, and use the midfoot proximal osteotomy guide groove and the midfoot distal osteotomy guide groove on the guide plate body to guide the doctor to complete the two osteotomy operations of the midfoot osteotomy surgery. Since the guide plate body can fit the midfoot bone structure, and the osteotomy surfaces where the midfoot proximal osteotomy guide groove and the midfoot distal osteotomy guide groove are located intersect at the line connecting the lowest points of the midline of the first cuneiform bone and the cuboid bone, it can ensure the accuracy of the curved osteotomy and ensure that a wedge-shaped osteotomy intersection line can be formed after two osteotomies, thereby completing the closed reduction after the osteotomy. Compared with manual operation, the guide plate greatly reduces the threshold and requirements for the doctor's clinical experience in midfoot osteotomy surgery, and improves the surgical effect of midfoot osteotomy surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0020] Figure 1 An exemplary structural diagram of a guide plate for midfoot osteotomy surgery according to some embodiments of the present application is shown;

[0021] Figure 2 Another exemplary structural diagram of a guide plate for midfoot osteotomy surgery according to some embodiments of the present application is shown;

[0022] Explanation of the reference numerals: 1. guide plate body; 2. positioning hole group; 3. guide hole group; 4. identification structure; 11. proximal midfoot osteotomy guide groove; 12. distal midfoot osteotomy guide groove; 21. second cuneiform anchoring positioning hole; 31. cuboid bone fixation guide hole; 32. second cuneiform fixation guide hole; 33. first cuneiform fixation guide hole; 41. distal pointing mark; 42. left and right indication marks. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0024] It should be understood that the terms "include" and "comprising" used in the specification and claims of the present application indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in this application specification and claims, unless the context clearly indicates otherwise, the singular forms of "a", "an" and "the" are intended to include plural forms. It should also be further understood that the term "and / or" used in this application specification and claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0026] As used in this specification and claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0027] The specific implementation of the present application is described in detail below with reference to the accompanying drawings.

[0028] Exemplary application scenarios

[0029] High arches or inverted feet are common complex foot skeletal deformities. Under normal circumstances, the arch angle (i.e. the lateral angle between the first metatarsal and the talus axis) should be within the range of ±4°. High arches or inverted feet are long-term pathological changes in bones and soft tissues that cause the bone structure of the foot to become disordered, resulting in the arch angle exceeding the normal angle range. Due to the complex spatial position relationship of the bone structure of the foot, it is extremely difficult to correct the arch angle.

[0030] At present, midfoot osteotomy surgery is usually performed manually by doctors based on their clinical experience. The main steps include wedge osteotomy, rotational reduction and internal fixation locking. Wedge osteotomy includes two osteotomies. In actual surgery, the intersection line between the osteotomy surface and the surface of the midfoot bone structure is a curve. In order to achieve precise wedge osteotomy, it is necessary to complete the irregular curve osteotomy along the osteotomy line, and at the same time, it is necessary to ensure that the two osteotomy surfaces intersect at the wedge intersection line. After the wedge osteotomy is completed, the distal end of the midfoot needs to be rotated with the wedge intersection line as the rotation axis until the distal and proximal bone surfaces of the midfoot are closed.

[0031] However, it is difficult to ensure the accuracy of osteotomy when completing curved osteotomy manually, resulting in unequal osteotomy angles at different positions after wedge osteotomy, and failure to achieve consistent angle correction. In addition, when reducing the midfoot, the intersection of the two osteotomy surfaces is used as the rotation axis to rotate the distal end of the midfoot until the distal and proximal bone surfaces of the midfoot are closed. However, it is difficult to grasp the osteotomy direction in actual clinical operations, and it is difficult to ensure that the two osteotomy surfaces intersect exactly with the bottom of the midfoot through manual operation, which can easily lead to the failure to form a clear reduction rotation axis after wedge osteotomy, and failure to complete closed reduction.

[0032] Therefore, the existing midfoot osteotomy surgery is difficult and complicated to perform, requires doctors to have high clinical experience, and the surgical effect is difficult to guarantee.

[0033] Exemplary Application Scenarios

[0034] In view of this, an embodiment of the present application provides a midfoot osteotomy surgery plan, which guides the doctor to accurately snap and fix the guide plate on the patient's midfoot bone structure through a positioning hole group and a guide hole group, and uses the midfoot proximal osteotomy guide groove and the midfoot distal osteotomy guide groove on the guide plate body to guide the doctor to complete the two osteotomy operations of the midfoot osteotomy surgery, which can assist the doctor to complete precise osteotomy, thereby improving the surgical effect.

[0035] Figure 1 to Figure 2 The exemplary structural diagrams of the guide plates for midfoot osteotomy surgery in some embodiments of the present application are shown from different angles. Figure 1 or Figure 2 As shown, an embodiment of the present application provides a guide plate for midfoot osteotomy surgery, which is applied in midfoot osteotomy surgery. The guide plate includes a guide plate body 1.

[0036] In actual use, the guide plate body 1 includes a back surface that can match and fit the midfoot bone structure, and a front surface that is opposite to the back surface and faces away from the upper surface of the midfoot bone structure. The guide plate body 1 also includes a distal end and a proximal end that are arranged oppositely, wherein the distal end refers to the end away from the patient's leg, and the proximal end refers to the proximal end close to the patient's leg.

[0037] The guide plate body 1 is provided with a midfoot proximal osteotomy guide groove 11 and a midfoot distal osteotomy guide groove 12, wherein the midfoot proximal osteotomy guide groove 11 is located at the proximal end of the guide plate body 1, and the midfoot distal osteotomy guide groove 12 is located at the distal end of the guide plate body 1. Specifically, Figure 1 As shown, when the guide plate body 1 is buckled onto the patient's midfoot bone structure, the midfoot proximal osteotomy guide groove 11 and the midfoot distal osteotomy guide groove 12 are located between the patient's talus and the first metatarsal, and the midfoot proximal osteotomy guide groove 11 is arranged close to the talus, and the midfoot distal osteotomy guide groove 12 is arranged close to the first metatarsal.

[0038] In the guide plate body 1, the osteotomy surfaces where the proximal midfoot osteotomy guide groove 11 and the distal midfoot osteotomy guide groove 12 are located intersect with the patient's first cuneiform bone, second cuneiform bone, third cuneiform bone and cuboid bone, avoiding the osteotomy operation involving the joint between the midfoot cuneiform bone and the metatarsal bones, thereby avoiding the osteotomy operation from damaging the patient's joints and affecting the patient's foot function.

[0039] Furthermore, in the guide plate body 1 provided in this embodiment, the osteotomy surfaces where the proximal midfoot osteotomy guide groove 11 and the distal midfoot osteotomy guide groove 12 are located intersect at the reduction rotation axis, and the reduction rotation axis is the line connecting the lowest points of the midline of the patient's first cuneiform bone and the cuboid bone. During the actual operation, the doctor completes two osteotomies along the proximal midfoot osteotomy guide groove 11 and the distal midfoot osteotomy guide groove 12, and the intersection of the two osteotomy surfaces just intersects at the bottom of the patient's midfoot, thereby completing the wedge-shaped osteotomy and forming a clear reduction rotation axis, which is conducive to the subsequent midfoot reduction operation.

[0040] In order to ensure that the back of the guide body 1 can better fit the patient's midfoot bone structure, the surface morphology of the side of the guide body 1 that is buckled with the midfoot bone structure is consistent with the surface morphology of the midfoot bone structure formed by the midfoot cuneiform, cuboid bone and accessory navicular bone. Since the surface morphology of the midfoot bone structure of different patients is different, the guide body 1 of this embodiment can be manufactured by a 3D printing method or a copy solidification method. Taking the 3D printing method as an example, the patient's foot model data can be obtained by CT scanning, and then the doctor, other experts or computer draws the print model data of the guide body 1 based on the foot model data, and then a 3D printer is used to manufacture the guide body 1 based on the print model data. Taking the copy solidification method as an example, a transitional physical model matching the patient's midfoot bone structure can be obtained by plastering, and then it is transformed into a simulated physical model with the same shape as the guide body 1. Based on the simulated physical model, an injection mold of the guide body 1 is obtained by scanning or casting, and finally the guide body 1 is obtained by injection molding with the help of the injection mold.

[0041] Furthermore, the guide plate body 1 can be made of a transparent material (such as a transparent resin) or a non-transparent material (such as nylon or resin). During surgery, after the guide plate is buckled onto the surface of the midfoot bone structure, the non-transparent guide plate will prevent the doctor from seeing through the tissue structure under the guide plate, affecting the doctor's surgical experience. Therefore, in order to facilitate the doctor to accurately position the guide plate body 1 on the patient's big toe, the present embodiment preferably uses a transparent material to manufacture the guide plate body 1.

[0042] In addition, a marking structure 4 may be provided on the front of the guide body 1, and the marking structure 4 is presented in the form of a protrusion, a groove and / or a coating. Specifically, the marking structure 4 in this embodiment may include a distal pointing mark 41 and / or a left and right indicating mark 42. The distal pointing mark 41 is used to indicate the distal end of the guide body 1, so as to instruct the doctor to buckle the guide on the patient's midfoot bone structure in the correct placement direction, thereby reducing the risk of delaying the operation due to the guide body 1 being reversely installed. Exemplarily, the distal pointing mark 41 may be presented as an arrow mark, and the end pointed by the arrow mark is the distal end of the guide body 1. Exemplarily again, the left and right indicating marks 42 may be presented as character marks, for example, the left and right indicating marks are "L" indicating that the current guide is used for the patient's left foot, and the left and right indicating marks are "R" indicating that the current guide is used for the patient's right foot.

[0043] Furthermore, the identification structure 4 may also include displaying the patient's identity information and / or the patient's condition information, wherein the identity information may include the name and / or the consultation number, etc., which can help the doctor confirm whether the guide body 1 matches the current patient, and prevent medical accidents caused by using other people's guides for surgery. The condition information may include the osteotomy angle to inform the doctor of the relevant operation parameters of the surgery to ensure the success rate of the surgery.

[0044] When performing midfoot osteotomy surgery using the guide plate for midfoot osteotomy surgery, in order to ensure that the guide plate body 1 is snapped into the correct position, the present embodiment provides a positioning hole group 2, which is provided on the guide plate body 1 to assist in aligning the guide plate body 1 with the midfoot bone structure.

[0045] like Figure 1 As shown in FIG. 2, the positioning hole group 2 includes second cuneiform anchoring positioning holes 21 disposed on both sides of the proximal midfoot osteotomy guide groove 11 and / or the distal midfoot osteotomy guide groove 12. As an example, the positioning hole group 2 includes four second cuneiform anchoring positioning holes 21, two of which are distributed on one side of the distal midfoot osteotomy guide groove 12, and the other two second cuneiform anchoring positioning holes 21 are distributed on the other side of the distal midfoot osteotomy guide groove 12, so that the four second cuneiform anchoring positioning holes 21 can be used for alignment and identification with the four end points of the top surface of the second cuneiform of the patient. In some embodiments, the second cuneiform anchoring positioning holes 21 can be presented as blind holes or through holes, which are not too restrictive here.

[0046] It should be noted that, in some embodiments, the positioning hole group 2 may also select any two or three of the four second cuneiform anchoring positioning holes 21 for positioning. In other embodiments, the positioning hole group 2 may also include other positioning holes, for example, a first cuneiform anchoring positioning hole for alignment and identification with the top surface of the first cuneiform, which is not too restrictive here.

[0047] In addition, when the guide plate for midfoot osteotomy is used to perform midfoot osteotomy, in order to prevent the movement of the guide plate body 1 from affecting the osteotomy operation, the present embodiment provides a guide hole group 3, which is provided on the guide plate body 1 and is used to accommodate the guide plate fixing pin. When the guide plate is used, the guide plate fixing pin can be inserted into the patient's foot along the guide plate, thereby fixing the guide plate to the midfoot bone structure.

[0048] As an example, the guide hole group 3 includes a cuboid fixation guide hole 31, a second cuneiform fixation guide hole 32, and a first cuneiform fixation guide hole 33. The cuboid fixation guide hole 31, the second cuneiform fixation guide hole 32, and the first cuneiform fixation guide hole 33 are arranged along the length direction of the midfoot distal osteotomy guide groove 12. Specifically, the cuboid fixation guide hole 31, the second cuneiform fixation guide hole 32, and the first cuneiform fixation guide hole 33 are arranged in sequence along the direction from the cuboid to the first cuneiform. The cuboid fixation guide hole 31, the second cuneiform fixation guide hole 32, and the first cuneiform fixation guide hole 33 are presented as through holes.

[0049] The guide plate fixing needle passing through the cuboid bone fixing guide hole 31 can fix the guide plate body 1 to the patient's cuboid bone, the guide plate fixing needle passing through the second cuneiform bone fixing guide hole 32 can fix the guide plate body 1 to the patient's second cuneiform bone, and the guide plate fixing needle passing through the first cuneiform bone fixing guide hole 33 can fix the guide plate body 1 to the patient's first cuneiform bone. The guide plate can be fixed on the patient's midfoot cuneiform bone and cuboid bone through the guide hole group 3 to ensure that the guide plate will not move during the osteotomy process.

[0050] Furthermore, within the spatial range between the front face of the guide plate body 1 and the reduction rotation axis, the hole axes of the cuboid bone fixing guide hole 31, the second cuneiform bone fixing guide hole 32 and the first cuneiform bone fixing guide hole 33 do not intersect with the osteotomy surfaces where the proximal midfoot osteotomy guide groove 11 and the distal midfoot osteotomy guide groove 12 are located, and do not intersect with the reduction rotation axis, thereby ensuring that during the osteotomy process, the guide plate fixing needle placed in the guide hole group 3 will not interfere with the saw blade or blade in the proximal midfoot osteotomy guide groove 11 and the distal midfoot osteotomy guide groove 12.

[0051] As an example, in order to prevent the guide plate fixing pin from accidentally disengaging during surgery, the cooperation between each fixing guide hole and the corresponding guide plate fixing pin can be selected as an interference fit.

[0052] In addition, in some embodiments, the positioning hole group 2 and / or the guide hole group 3 and the guide plate body 1 may be an integrally formed structure to reduce manufacturing costs.

[0053] In order to facilitate those skilled in the art to understand the structure and function of the guide plate, the following is an exemplary description of the use of the guide plate:

[0054] First, the doctor first confirms whether the guide plate is suitable for the patient's left or right foot through the left and right indicator marks 42 on the guide plate body 1, and then confirms whether the guide plate is placed in the correct direction through the distal pointing mark 41 on the guide plate body 1. After ensuring that the distal pointing mark 41 points to the distal end of the midfoot bone structure, the guide plate body 1 is buckled on the upper surface of the midfoot bone structure, and the curved surface position that best matches the back of the guide plate body 1 is found to check whether the four second cuneiform anchoring holes 21 are aligned one by one with the four endpoints of the patient's second cuneiform top surface. If not aligned, fine-tune until aligned. After alignment, the guide plate fixing needle is inserted along the cuboid bone fixing guide hole 31, the second cuneiform fixing guide hole 32 and the first cuneiform fixing guide hole 33 respectively, so that the guide plate is fixed on the midfoot cuneiform and cuboid bones, ensuring that the guide plate will not move during the osteotomy process. After the guide plate is fixed, a saw blade or a blade is used to complete the wedge osteotomy along the proximal midfoot osteotomy guide groove 11 and the distal midfoot osteotomy guide groove 12 respectively. Finally, the guide plate fixing pins are removed and the guide plate is removed, and the intersection of the osteotomy surfaces of the proximal midfoot osteotomy guide groove 11 and the distal midfoot osteotomy guide groove 12 is used as the rotation axis to complete the closed reduction of the distal and proximal midfoot.

[0055] In the above description of the present application, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" and the like should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in the present application, those skilled in the art can understand the specific meanings of the above terms in the present utility model according to the specific circumstances.

[0056] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0057] Although multiple embodiments of the utility model have been shown and described herein, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may think of many changes, modifications and alternatives without departing from the idea and spirit of the utility model. It should be understood that in the process of practicing the utility model, various alternatives to the embodiments of the utility model described herein may be adopted. The attached claims are intended to define the scope of protection of the utility model, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A guide plate for midfoot osteotomy surgery, characterized in that: include: A guide plate body (1) is used to be buckled on the midfoot bone structure, and is provided with a midfoot proximal osteotomy guide groove (11) and a midfoot distal osteotomy guide groove (12), wherein the osteotomy surfaces where the midfoot proximal osteotomy guide groove (11) and the midfoot distal osteotomy guide groove (12) are located intersect at a reduction rotation axis, and the reduction rotation axis is a line connecting the lowest points of the midlines of the first cuneiform bone and the cuboid bone in the midfoot bone structure; a positioning hole group (2), which is arranged on the guide plate body (1) and is used to assist in aligning the guide plate body (1) with the midfoot bone structure; and A guide hole group (3) is arranged on the guide plate body (1) and is used to guide the guide plate fixing needle to fix the guide plate body (1) to the midfoot bone structure.

2. The guide plate according to claim 1, characterized in that: The positioning hole group (2) comprises second cuneiform anchoring positioning holes (21) arranged on both sides of the proximal midfoot osteotomy guide groove (11) and / or the distal midfoot osteotomy guide groove (12).

3. The guide plate according to claim 1, characterized in that: The guide hole group (3) comprises a cuboid bone fixing guide hole (31), a second cuneiform bone fixing guide hole (32) and a first cuneiform bone fixing guide hole (33) arranged along the length direction of the midfoot distal osteotomy guide groove (12); the cuboid bone fixing guide hole (31), the second cuneiform bone fixing guide hole (32) and the first cuneiform bone fixing guide hole (33) are arranged in sequence along the direction from the cuboid bone to the first cuneiform bone.

4. The guide plate according to claim 1, characterized in that: The osteotomy surfaces where the proximal midfoot osteotomy guide groove (11) and the distal midfoot osteotomy guide groove (12) are located both intersect with the first cuneiform bone, the second cuneiform bone, the third cuneiform bone and the cuboid bone in the midfoot bone structure.

5. The guide plate according to claim 1, characterized in that: The proximal midfoot osteotomy guide groove (11) and the distal midfoot osteotomy guide groove (12) are located between the talus and the first metatarsal bone, and the proximal midfoot osteotomy guide groove (11) is arranged close to the talus, and the distal midfoot osteotomy guide groove (12) is arranged close to the first metatarsal bone.

6. The guide plate according to claim 1, characterized in that: The surface morphology of one side of the guide plate body (1) that is buckled onto the midfoot bone structure is consistent with the surface morphology of the midfoot bone structure formed by the midfoot cuneiform bone, the cuboid bone and the accessory navicular bone.

7. The guide plate according to claim 1, characterized in that: Also includes: A marking structure (4) is provided on the side of the guide plate body (1) facing away from the midfoot bone structure and is presented in the form of protrusions, grooves and / or coatings, wherein the marking structure (4) includes a distal pointing mark (41) and / or a left and right indicating mark (42).

8. The guide plate according to any one of claims 1 to 7, characterized in that: The guide plate body (1) is made of transparent material.

9. The guide plate according to any one of claims 1 to 7, characterized in that: The guide plate body (1) is a component manufactured by a 3D printing method.

10. A midfoot osteotomy auxiliary device, characterized in that: include: A guide plate and a guide plate fixing pin, wherein the guide plate is a guide plate for midfoot osteotomy surgery as described in any one of claims 1-9.

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