Personalized 3D printing guide plate for supraankle osteotomy

Abstract

A personalized ankle osteotomy 3D printing guide plate comprises a 3D printing main body which is fixed to an operation part through a kirschner wire during use, and is characterized in that a guide hole penetrating through the main body and a plurality of positioning holes are formed in the main body, the guide hole is used for guiding the osteotomy cutting direction, the positioning holes are used for allowing the kirschner wire to penetrate through, and the 3D printing main body is designed through computer aided design; the inner side face of the main body of the guide plate is matched with the peripheral face of the tibia of the surgical site, personalized customization can be carried out according to the shape of the peripheral face of the tibia of the surgical site of a patient, a surgical auxiliary tool which is more suitable for the condition of the patient and is simple in structure is provided for the patient, and the guide hole can better guide operation of a doctor during surgery. The main body is fixed on the peripheral surface of the tibia through the positioning hole by using a kirschner wire, so that the main body can be more stably fixed on an operation part.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a personalized 3D-printed guide plate for supra-ankle osteotomy. Background Technology

[0002] Ankle deformities are highly complex, especially those secondary to premature closure of the distal tibia and fibula epiphyses in children and adolescents. These deformities involve three-dimensional deformities in the transverse, sagittal, and coronal planes. Supra-ankle osteotomy is often used to restore normal ankle anatomy and correct lower limb alignment. However, traditional supra-ankle osteotomy correction plans are designed preoperatively by orthopedic surgeons based on two-dimensional images such as X-rays, CT scans, and MRI. For three-dimensional ankle deformities, two-dimensional images cannot accurately assess the condition and plan the osteotomy. Intraoperatively, the surgeon's experience is highly relied upon, requiring frequent intraoperative fluoroscopy to achieve satisfactory corrective results and lower limb alignment. This approach fails to meet the requirements of precise and personalized treatment, and postoperative deviations in correction may even occur.

[0003] To address the aforementioned issues, Chinese patent document CN211156060U discloses a surgical guide assembly for supra-ankle osteotomy, used to guide osteotomy and correction of the distal tibia. The assembly is characterized by comprising a positioning osteotomy seat for positioning on the distal tibia. The positioning osteotomy seat includes a first positioning plate and a second positioning plate spaced apart along a first direction and fitted onto the distal tibia bone surface, and a connector connecting the first and second positioning plates. The connector is integrally formed with the first and second positioning plates. The first positioning plate includes a first base protruding along a second direction, and the second positioning plate includes a second base protruding in the same direction as the first base. The first and second bases are spaced apart and connected by the connector. A cutting groove extending along the second direction is formed between the first and second bases. The connector is located at both ends of the first and second bases along a third direction and outside the cutting groove.

[0004] The above-mentioned ankle osteotomy surgical guide plate assembly consists of multiple parts, which presents a problem of complex components. Furthermore, it cannot be well adapted to the lateral surface of the tibia of different patients, which may lead to deviations in the cutting during surgery and cause inconvenience to the operation. Summary of the Invention

[0005] The purpose of this invention is to provide a 3D-printed guide plate for supra-ankle osteotomy that has a simple structure and is more suitable for the actual situation of patients.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A personalized 3D-printed guide plate for supra-ankle osteotomy includes a 3D-printed main body, which is fixed to the surgical site by Kirschner wires during use. The main body is characterized by having a guide hole and multiple positioning holes that penetrate the main body. The guide hole is used to guide the osteotomy cutting direction, and the positioning holes are used for Kirschner wires to pass through.

[0008] By adopting the above technical solution and using computer-aided design to 3D print the main body, the inner side of the guide plate is adapted to the outer circumferential surface of the tibia at the surgical site. This allows for personalized customization based on the shape of the outer circumferential surface of the tibia at the patient's surgical site, providing the patient with a surgical aid tool that is more suitable for their own situation and has a simple structure. The guide hole can better guide the doctor's operation during surgery, and the positioning hole uses Kirschner wires to fix the main body to the outer circumferential surface of the tibia, which can make the main body more stably fixed on the surgical site.

[0009] The guide hole is straight, and the outer circumference of the main body has two guide plates extending outward from both sides of the guide hole. The two guide plates are arranged in parallel and opposite directions.

[0010] By adopting the above technical solution, the two guide plates extending outward from both sides of the guide hole on the outer peripheral surface of the main body, and arranged in parallel relative to each other, further enhance the guiding function of the osteotomy direction and strictly constrain the osteotomy path, thereby further improving the accuracy of osteotomy.

[0011] It includes two guide holes, with one end of each guide hole arranged close together and the other end gradually opening.

[0012] By employing the above-mentioned technical solution, two guide holes are provided, one end close together and the other end gradually opening, thus providing two osteotomy guidance paths in different directions for the surgery. In supra-ankle osteotomy, depending on the patient's specific condition and skeletal deformity, osteotomy operations may need to be performed from different angles to achieve the best corrective or therapeutic effect. These two guide holes allow the surgery to adapt more flexibly to diverse clinical situations and make the operation more convenient for the surgeon.

[0013] One end of the guide hole penetrates the body from the side.

[0014] By adopting the above technical solution, one end of a guide hole penetrates the main body from the side, allowing doctors to start operating from the penetrating end when using surgical instruments, which greatly facilitates the operation of doctors when using surgical instruments.

[0015] The plurality of positioning holes include at least two positioning holes located on the upper section of the body and at least two positioning holes located on the lower section of the body.

[0016] By adopting the above technical solution, when the Kirschner wire passes through multiple positioning holes in the upper and lower sections to fix the guide plate, the force can be more evenly distributed on the entire guide plate, and the unnecessary displacement such as translation and rotation of the guide plate during the operation can be effectively prevented, providing an extremely stable fixation base for the surgical operation.

[0017] The guide hole is located between the positioning hole on the upper section of the main body and the positioning hole on the lower section of the main body.

[0018] By adopting the above technical solution, the guide hole is located between the upper and lower positioning holes of the main body, which helps to achieve a more reasonable force balance. During the operation, after the Kirschner wire fixes the guide plate to the surgical site through the positioning holes of the upper and lower sections, the force generated by the surgical instruments when performing osteotomy in the guide hole can be relatively evenly distributed to various parts of the guide plate. This avoids the guide plate from deforming or loosening due to excessive local force, which affects stability and ensures that the guide plate can reliably play its role in guiding osteotomy throughout the entire operation.

[0019] The main body is a plate-like structure adapted to the shape of the tibia.

[0020] By adopting the above technical solution, each patient's tibial shape has certain individual differences. This plate-like structure that is adapted to the shape of the tibia can meet the needs of personalized surgery. It can be customized for the characteristics of different patients' tibias, so that the guide plate can provide doctors with the most suitable osteotomy guidance in each surgery, truly realizing the adjustment of surgical operation according to individual differences, which helps to achieve better surgical results.

[0021] The main body is made of polymer material.

[0022] By adopting the above technical solution, polymers can be well adapted to the processing requirements of 3D printing technology, making it easy to manufacture guide plate bodies with various complex shapes and fine structures. Attached Figure Description

[0023] Figure 1 This is a three-dimensional model of the bilateral tibia, fibula, and ankle joint bones.

[0024] Figure 2 This is a mirror image of the healthy side.

[0025] Figure 3 To simulate the supra-ankle osteotomy planar view on a computer.

[0026] Figure 4 To simulate osteotomy guide plate diagram on computer.

[0027] Figure 5 This is a perspective view of the present invention.

[0028] Figure 6 This is a diagram showing the usage state of this utility model.

[0029] Figure 7 This is the right view of the present invention. Detailed Implementation

[0030] Reference Figures 1 to 7 The present invention relates to a personalized 3D-printed guide plate for supra-ankle osteotomy. The technical solution of this invention will be further described below through specific embodiments and in conjunction with the accompanying drawings:

[0031] Reference Figures 1 to 4 The method for computer-aided design of personalized ankle osteotomy 3D printing guide plate is as follows: (1) Collect CT scan data of the entire length of the bilateral tibia and fibula and the ankle joint, establish a three-dimensional model of the bilateral tibia and fibula and the ankle joint, remove the fibula model occlusion, and generate a mirror model of the healthy side; (2) Refer to the mirror model of the healthy side or normal structural and functional parameters, simulate the closed osteotomy of the ankle through computer-aided design, and obtain the angles to be corrected and the osteotomy planes in the coronal and sagittal planes; (3) Combine the osteotomy correction position and the plate fixation position to 3D print the osteotomy guide plate.

[0032] like Figures 5 to 7 The personalized supra-ankle osteotomy 3D-printed guide shown includes a main body 1 made of polymer printing, which can be fixed to the surgical site with Kirschner wires during use.

[0033] The main body 1 is a 3D-printed plate-like structure. The inner surface of the main body 1 is adapted to the outer peripheral surface of the tibia 2 at the surgical site. Two guide holes 11 and four positioning holes 12 are formed on the main body 1. One end of the two guide holes 11 is close together, and the other end gradually opens. One end of one guide hole 11 penetrates the main body 1 from the side, so that the doctor can start the operation from the end that penetrates the side of the main body 1 during the operation. The guide hole 11 is straight. Two guide plates 13 are formed on the outer peripheral surface of the main body 1, extending outward from both sides of the guide holes 11. The two guide plates 13 are arranged in parallel and opposite directions. The guide plates 13 can better constrain the osteotomy path, facilitate the doctor's operation, and further improve the accuracy of the operation. Four positioning holes 12 are distributed in pairs on the upper and lower sections of the main body 1, and two guide holes 11 are located between the two positioning holes 12 on the upper section and the two positioning holes 12 on the lower section of the main body 1. This helps to achieve a more reasonable force balance. During the operation, after the Kirschner wire fixes the guide plate to the surgical site through the positioning holes 12 on the upper and lower sections, the force generated by the surgical instruments when performing osteotomy in the guide holes 11 can be relatively evenly distributed to various parts of the guide plate. This avoids the guide plate from deforming or loosening due to excessive local force, which affects its stability and ensures that the guide plate can reliably perform its function of guiding osteotomy throughout the entire operation.

[0034] When using it, doctors can adjust the dosage according to the patient's specific condition, such as... Figures 1 to 4 The procedure involves acquiring CT scan data of the entire length of both tibias and fibulas and the ankle joint to establish a three-dimensional model of the bilateral tibias, fibulas, and ankle joint. Obstructions in the fibular model are removed, and a mirror image of the healthy side is generated. Then, referencing the mirror image of the healthy side or normal structural and functional parameters, computer-aided design is used to simulate closed osteotomy correction of the ankle, thereby designing precise osteotomy directions and angles in the coronal and sagittal planes. An osteotomy guide plate is simulated and 3D printed to create a personalized ankle osteotomy guide plate. During the surgery, a 2.0mm diameter Kirschner wire is inserted through the positioning hole 12 to install the osteotomy guide plate. A medical electric saw is used to perform the osteotomy along the guide hole 11 on the main body 1, ensuring the restoration of lower limb alignment and ankle joint function.

[0035] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be construed as limiting the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model shall still fall within the scope of the patent of the present utility model.

Claims

1. A personalized 3D-printed guide plate for supra-ankle osteotomy, comprising a 3D-printed main body, which is fixed to the surgical site by Kirschner wires during use, characterized in that: The inner surface of the main body is adapted to the outer peripheral surface of the tibia at the surgical site. The main body has a guide hole that runs through it and multiple positioning holes. The guide hole is used to guide the direction of osteotomy, and the positioning holes are used for Kirschner wires to pass through.

2. The personalized supra-ankle osteotomy 3D-printed guide plate according to claim 1, characterized in that: The guide hole is straight, and the outer circumference of the main body has two guide plates extending outward from both sides of the guide hole. The two guide plates are arranged in parallel and opposite directions.

3. The personalized supra-ankle osteotomy 3D-printed guide plate according to claim 2, characterized in that: It includes two guide holes, with one end of each guide hole arranged close together and the other end gradually opening.

4. The personalized supra-ankle osteotomy 3D-printed guide plate according to claim 3, characterized in that: One end of the guide hole penetrates the body from the side.

5. A personalized supra-ankle osteotomy 3D-printed guide plate according to claim 2, characterized in that: The plurality of positioning holes include at least two positioning holes located on the upper section of the body and at least two positioning holes located on the lower section of the body.

6. A personalized supra-ankle osteotomy 3D-printed guide plate according to claim 5, characterized in that: The guide hole is located between the positioning hole on the upper section of the main body and the positioning hole on the lower section of the main body.

7. A personalized supra-ankle osteotomy 3D-printed guide plate according to any one of claims 1 to 6, characterized in that: The main body is a plate-like structure adapted to the shape of the tibia.

8. A personalized supra-ankle osteotomy 3D-printed guide plate according to any one of claims 1 to 6, characterized in that: The main body is made of polymer material.

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