Osteotomy guide plate for hallux valgus Chevron osteotomy

Abstract

The invention relates to the technical field of medical surgical instruments, in particular to an osteotomy guide plate for hallux valgus Chevron osteotomy, which comprises a plate body, a positioning part and an osteotomy part, wherein the plate body is of a curved plate-shaped structure matched with the contour of the bone surface at the hallux valgus osteotomy position, and the plate body is provided with a near end face, a far end face and at least two side surfaces; the positioning part is fixedly arranged on the near end face of the plate body, and the osteotomy part is fixedly arranged on the side surface of the plate body; the positioning part comprises a plurality of positioning protrusion structures fixedly arranged on the near end face of the plate body and a plurality of positioning holes formed in the positioning protrusion structures along the central axis of the positioning protrusion structures. Wherein each positioning hole penetrates through the plate body; the plate body is attached to the curved surface of the osteotomy part, it is ensured that the guide plate is tightly attached to the bone surface, the positioning part is matched with the positioning hole through the positioning protrusion structure, the guide plate is temporarily and stably fixed, and deviation in the operation is avoided; and the osteotomy guide structure accurately guides osteotomy.

Description

Technical Field

[0001] This invention relates to the field of medical surgical instruments, specifically to an osteotomy guide plate for Chevron osteotomy of hallux valgus. Background Technology

[0002] In orthopedic clinical treatment, Chevron osteotomy is a classic surgical procedure for correcting hallux valgus deformity. Its core principle involves adjusting the metatarsal position by making a V-shaped osteotomy on the medial side of the first metatarsal head to correct the deformity. However, the current Chevron osteotomy procedure heavily relies on the surgeon's experience and operational precision, presenting several problems that urgently need to be addressed.

[0003] Traditional osteotomy procedures lack precise auxiliary positioning structures, relying solely on the surgeon's visual judgment of the osteotomy position and angle. This can easily lead to problems such as insufficient osteotomy volume and directional deviation, resulting in incomplete deformity correction, postoperative recurrence, or increased risk of malunion due to uneven osteotomy surfaces. While some existing osteotomy guides can provide some guidance, they are mostly general-purpose structures that do not conform to the bone surface contour of the patient's hallux valgus osteotomy site, resulting in poor fit, easy displacement during surgery, and inability to guarantee precise positioning.

[0004] Meanwhile, the existing guide plate positioning structure design is unreasonable. Most of them only have simple holes and lack the protrusion structure for inserting guiding positioning components (such as Kirschner wires), which can easily lead to puncture deviation of the positioning components and further affect the osteotomy accuracy. Moreover, the osteotomy guiding structure is mostly fixed at an angle, which cannot be adapted to the different degrees of hallux valgus in different patients (such as the difference in the angle between the first and second metatarsals), resulting in insufficient universality and personalization.

[0005] Furthermore, some guide plates employ a modular assembly structure, resulting in assembly gaps that affect overall stability. Moreover, the manufacturing process cannot meet the processing requirements of personalized curved surfaces, making it difficult to achieve a closed loop of "preoperative planning - precise intraoperative execution." Based on the aforementioned shortcomings of the existing technology, this invention provides a personalized osteotomy guide plate that offers precise fit, secure positioning, and reliable osteotomy guidance, thereby improving the accuracy and safety of the Chevron osteotomy procedure.

[0006] Therefore, those skilled in the art are dedicated to developing an osteotomy guide for Chevron osteotomy of hallux valgus in order to solve the technical problems existing in the prior art. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of the prior art by providing an osteotomy guide plate for Chevron osteotomy of hallux valgus.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] An osteotomy guide for Chevron osteotomy of hallux valgus includes: a plate body, a positioning part, and an osteotomy part;

[0010] The plate has a curved plate-like structure that conforms to the contour of the bone surface at the hallux valgus osteotomy site, and the plate has a proximal end face, a distal end face, and at least two side surfaces.

[0011] The positioning part is fixedly disposed on the proximal end face of the plate, and the osteotomy part is fixedly disposed on the side surface of the plate;

[0012] The positioning part includes: a plurality of positioning protrusions fixedly disposed on the near end face of the plate, and a plurality of positioning holes opened on each positioning protrusion along the central axis of the positioning protrusions;

[0013] Each positioning hole penetrates the plate.

[0014] The distal surface of the osteotomy section is a curved surface that conforms to the contour of the bone surface at the position of hallux valgus osteotomy. The distal surface of the osteotomy section and the distal surface of the plate are together attached to the bone surface at the position of hallux valgus osteotomy. The osteotomy section has a through osteotomy guide structure along its thickness direction.

[0015] Furthermore, the plate, positioning part, and osteotomy part are integrally formed.

[0016] Furthermore, the osteotomy guiding structure includes: a first osteotomy groove and a second osteotomy groove; wherein the first osteotomy groove and the second osteotomy groove are connected, and there is an included angle of 60° to 120° between the first osteotomy groove and the second osteotomy groove.

[0017] Furthermore, the plate, positioning part, and osteotomy part are integrally formed using 3D printing technology.

[0018] Furthermore, the plate, the positioning part, and the osteotomy part are made of at least one of polyetheretherketone (PEEK), pure titanium, or titanium alloy.

[0019] Furthermore, the thickness of the osteotomy section is greater than the thickness of the plate.

[0020] Furthermore, the positioning protrusion is a nail post, the positioning hole is a nail hole, and a Kirschner nail is detachably installed in the nail hole.

[0021] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0022] This invention utilizes medical imaging and 3D reconstruction to achieve personalized design of the plate, positioning section, and osteotomy section, which are then manufactured using 3D printing technology. This allows for precise adaptation to individual patient bone differences. The curved surface fit design of the plate and osteotomy section ensures a tight fit between the guide plate and the bone surface. The positioning section uses positioning protrusions and positioning holes to temporarily stabilize and fix the guide plate, preventing intraoperative displacement. The osteotomy guiding structure precisely guides Chevron osteotomy, and the thickened design of the osteotomy section enhances structural strength. The integral molding and selection of medical-grade materials ensure the biocompatibility and mechanical properties of the guide plate. In summary, this invention can improve surgical precision, shorten operation time, and reduce the risk of complications. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the upper axial side structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the lower axial side structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the present invention when it is attached to the skeleton;

[0026] The reference numerals in the attached figures are:

[0027] 1. Plate body; 2. Positioning part; 3. Osteotomy part; 11. Distal end face of the plate body; 21. Positioning hole; 22. Positioning protrusion structure; 31. Osteotomy guide structure. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0031] Example 1

[0032] This embodiment provides an osteotomy guide for Chevron osteotomy in hallux valgus, such as... Figures 1-3 As shown, it includes: plate 1, positioning part 2, and osteotomy part 3.

[0033] Plate 1 is a curved plate-like structure. Its overall shape is designed based on the bone data of the patient's hallux valgus osteotomy position (such as the medial side of the first metatarsal head): First, the precise image data of the patient's first metatarsal head is obtained through medical imaging technology, and then the bone surface model is constructed through three-dimensional reconstruction technology. Finally, the curved shape of plate 1 is determined so that it is completely adapted to the contour of the bone surface.

[0034] The plate 1 has a proximal face (facing the surgeon), a distal face 11 (facing the bone), and at least two lateral faces;

[0035] Among them, the distal surface 11 of the plate 1 is an irregular curved surface. This curved surface is uniquely aligned with the bone surface through preoperative planning, ensuring that the guide plate can be quickly positioned in the correct position during the operation without repeated adjustments and reducing interference with soft tissues.

[0036] Furthermore, the positioning part 2 is fixedly disposed on the near end face of the plate 1. The positioning part 2 includes two positioning protrusions 22 and two positioning holes 21, and the positioning protrusions 22 and the positioning holes 21 are correspondingly disposed.

[0037] The positioning protrusion structure 22 is fixed to the near end face of the plate 1;

[0038] The positioning hole 21 is opened along the central axis of the positioning protrusion structure 22, and passes through the positioning protrusion structure 22 and the plate 1, and finally connects to the far end face 11 of the plate 1.

[0039] Furthermore, the positioning protrusion 22 is a nail post, the positioning hole 21 is a nail hole, and a Kirschner nail is detachably installed in the nail hole.

[0040] During the procedure, the Kirschner wire passes through the positioning hole 21 and then through the patient's bone to temporarily fix the guide plate to the bone, preventing the guide plate from shifting during osteotomy and ensuring positioning stability.

[0041] Furthermore, the osteotomy part 3 is fixedly disposed on the side surface of the plate 1, and its distal surface (the side facing the bone) is also an irregular curved surface. This curved surface works in conjunction with the distal surface 11 of the plate 1 to make the guide plate fit tightly against the bone surface.

[0042] The osteotomy section 3 has a through osteotomy guide structure 31 along its own thickness direction. The osteotomy guide structure 31 provides a guiding function for the osteotomy tool (such as a oscillating saw).

[0043] Specifically, the osteotomy guide structure 31 includes a first osteotomy groove and a second osteotomy groove, which are interconnected. The angle between the first osteotomy groove and the second osteotomy groove is 90°, which is adapted to the V-shaped osteotomy requirement of Chevron osteotomy and forms a V-shaped guide channel to ensure that the osteotomy tool cuts along the preset path and avoids osteotomy angle deviation.

[0044] Meanwhile, the thickness of the osteotomy part 3 is greater than the thickness of the plate 1. This design can improve the structural strength of the osteotomy part 3 and prevent the osteotomy tool (such as a oscillating saw) from deforming the osteotomy part 3 due to impact during the cutting process.

[0045] The plate 1, positioning part 2, and osteotomy part 3 adopt an integrated molding structure, and the preferred manufacturing method is 3D printing technology (additive manufacturing technology): based on the three-dimensional model of the guide plate designed before operation, medical materials such as polyetheretherketone, pure titanium, or titanium alloy are selected for printing.

[0046] Example 2

[0047] This embodiment 2 provides the following steps for using an osteotomy guide plate for Chevron osteotomy of hallux valgus as described in embodiment 1:

[0048] Step 1: Based on the patient's bone data, complete the personalized design and 3D printing of the guide plate, and sterilize it for later use;

[0049] Step 2: Expose the patient's hallux valgus osteotomy site (first metatarsal head), clean the soft tissue on the bone surface, and then attach the distal surface 11 of plate 1 to the distal surface of osteotomy part 3 to the bone surface. The guide plate is quickly positioned by utilizing the unique fitting characteristics of the curved surface.

[0050] Step 3: Pass the Kirschner wire through the positioning hole 21 of the positioning part 2, and through the bone to complete the temporary fixation of the guide plate to the bone;

[0051] Steps: Insert the oscillating saw into the osteotomy guide structure 31 and perform osteotomy along the grooves of the first osteotomy groove and the second osteotomy groove;

[0052] Step 4: After the osteotomy is completed, remove the Kirschner wires, remove the guide plate, and proceed with subsequent metatarsal reduction and fixation procedures.

[0053] In summary, the osteotomy guide plate of this embodiment solves the problems of poor fit and inaccurate positioning of traditional guide plates. Through the stable fixation of the positioning part and the precise guidance of the osteotomy part, the accuracy and safety of Chevron osteotomy are improved. At the same time, the one-piece molding and the selection of medical materials ensure the reliability of the guide plate. Ultimately, it achieves the technical effect of shortening the operation time and reducing the risk of complications, providing a personalized and intelligent treatment plan for hallux valgus correction.

[0054] The above description of the present invention is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. An osteotomy guide for Chevron osteotomy in hallux valgus, characterized in that, include: The plate (1), the positioning part (2), and the osteotomy part (3); among which, The plate (1) is a curved plate-shaped structure adapted to the contour of the bone surface at the position of hallux valgus osteotomy. The plate (1) has a proximal end face, a distal end face (11), and at least two side surfaces. The positioning part (2) is fixedly disposed on the proximal end face of the plate (1), and the osteotomy part (3) is fixedly disposed on the side surface of the plate (1); The positioning part (2) includes: a plurality of positioning protrusions (22) fixedly disposed on the near end face of the plate (1), and a plurality of positioning holes (21) opened on each of the positioning protrusions (22) along the central axis of the positioning protrusions (22); The positioning holes (21) penetrate the plate (1); The distal surface of the osteotomy part (3) is a curved surface that conforms to the contour of the bone surface at the position of hallux valgus osteotomy. The distal surface of the osteotomy part (3) and the distal surface (11) of the plate (1) are together attached to the bone surface at the position of hallux valgus osteotomy. The osteotomy part (3) has a through osteotomy guide structure (31) along its thickness direction.

2. The personalized osteotomy guide for Chevron osteotomy of hallux valgus according to claim 1, characterized in that, The plate (1), the positioning part (2), and the osteotomy part (3) are integrally formed.

3. A personalized osteotomy guide for Chevron osteotomy of hallux valgus according to claim 1, characterized in that, The osteotomy guiding structure (31) includes: a first osteotomy groove and a second osteotomy groove; Wherein, the first osteotomy groove is connected to the second osteotomy groove, and The first osteotomy groove and the second osteotomy groove have an included angle of 60° to 120°.

4. A personalized osteotomy guide for Chevron osteotomy in hallux valgus according to claim 2, characterized in that, The plate (1), the positioning part (2), and the osteotomy part (3) are integrally formed using 3D printing technology.

5. A personalized osteotomy guide for Chevron osteotomy of hallux valgus according to claim 1, characterized in that, The plate (1), the positioning part (2), and the osteotomy part (3) are made of at least one of polyetheretherketone material, pure titanium material, or titanium alloy material.

6. A personalized osteotomy guide for Chevron osteotomy of hallux valgus according to claim 1, characterized in that, The thickness of the osteotomy section (3) is greater than the thickness of the plate (1).

7. A personalized osteotomy guide for Chevron osteotomy of hallux valgus according to claim 1, characterized in that, The positioning protrusion structure (22) is a nail post, the positioning hole (21) is a nail hole, and a Kirschner nail is detachably installed in the nail hole.

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