3D printing guide plate for high tibial osteotomy

Abstract

The utility model relates to the technical field of medical instruments, and discloses a tibia high osteotomy 3D printing guide plate which comprises a main guide plate, an auxiliary positioning plate and a connecting piece, and a 3D printing three-dimensional structure constructed by the main guide plate and the auxiliary positioning plate through CT data is tightly attached to the tibia bone surface of a patient. The main guide plate and the auxiliary positioning plate are connected into a whole through the connecting piece so that the main guide plate and the auxiliary positioning plate can be effectively connected, the main guide plate is arranged close to the inner side bone surface of the proximal tibia of a patient, and the auxiliary positioning plate is attached to the tibial tuberosity dead point bone surface of the far end of the patellar ligament of the patient. Medical staff can position through the guide hole and penetrate a kirschner wire into the tibia. Compared with the prior art, the 3D printing guide plate is small in size and not prone to being blocked by soft tissue, guiding and positioning of the kirschner wire are completed through the multiple planes and the reference marks at the same time, the positioning accuracy is higher, and the structure is simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a 3D printed osteotomy guide plate for high tibial osteotomy. Background Art

[0002] High tibial osteotomy is mainly used in the correction of tibial plateau varus deformity of the knee joint. With the continuous promotion of 3D printing technology, the personalized 3D printed guides for high tibial osteotomy are gradually being promoted and applied in clinical practice. Such guides have the advantages of simplifying the surgical steps of high tibial osteotomy and increasing the accuracy of osteotomy. Of course, with the continuous use of 3D printed guides, various problems have gradually been exposed. Specifically, the existing 3D printed guides are too large and easily blocked by soft tissues. At the same time, they only use a single plane to complete the positioning with the tibia, which will inevitably cause errors due to insufficient reference and thus affect the actual surgical effect. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a 3D printed guide plate for high tibial osteotomy, which utilizes multiple planes to simultaneously fit the tibial bone surface combined with positioning marks to achieve the positioning of the 3D printed guide plate for high tibial osteotomy, significantly improving the positioning accuracy and reducing the error size during positioning.

[0004] Based on this, the utility model provides a 3D printed guide plate for high tibial osteotomy, which includes:

[0005] A main guide plate, wherein the main guide plate is a three-dimensional curved surface and is arranged close to the patient's tibia and is located at the proximal end of the patient's tibia. A guide hole is provided on the side of the main guide plate facing away from the patient's tibia, and the guide hole is used to insert a Kirschner wire into the tibia;

[0006] An auxiliary positioning plate, wherein the auxiliary positioning plate is in the form of a three-dimensional curved surface and is arranged closely against the tibial bone surface of the patient and is located at the tibial attachment point of the patient's patellar ligament;

[0007] A connecting piece, which is arranged in an arc shape and connects the main guide plate and the auxiliary positioning plate into one body;

[0008] There are multiple auxiliary positioning plates, and each of the auxiliary positioning plates is connected to the main plate through the connecting piece.

[0009] In some embodiments of the present application, there are two guide holes, the two guide holes are arranged in sequence and the Kirschner wire is arranged in each guide hole.

[0010] In some embodiments of the present application, an identification mark is provided on the main plate, and the identification mark is used to display the distance from the guide hole to the proximal tibial articular surface.

[0011] In some embodiments of the present application, the edge of the guide hole protrudes outward to form a guide column, the guide column faces the direction of the fibula head, and the protruding height of the guide column is 5 mm.

[0012] In some embodiments of the present application, the main guide plate is arranged in a square shape, and its long axis is parallel to the tibial axis.

[0013] In some embodiments of the present application, the side length of the main conductor is 25 mm.

[0014] In some embodiments of the present application, the auxiliary positioning plate is arranged in a rectangular shape.

[0015] In some embodiments of the present application, the length of the auxiliary positioning plate is 15 mm, and the width of the auxiliary positioning plate is 10 mm.

[0016] The 3D printed guide plate for high tibial osteotomy provided in the embodiment of the utility model has the following beneficial effects compared with the prior art:

[0017] The utility model provides a 3D printed guide plate for high tibial osteotomy, comprising a main plate, an auxiliary positioning plate and a connecting piece, wherein the main plate and the auxiliary positioning plate are arranged in close contact with the tibial bone surface of the patient, and the connecting piece is respectively connected to the two as a whole to realize the effective connection between the main plate and the auxiliary positioning plate, the main plate is arranged close to the proximal end of the patient's tibia, and the auxiliary positioning plate is attached to the tibial attachment point of the patient's patellar ligament, further, the surface of the main plate is provided with a guide hole, and medical staff can locate through the guide hole and insert a Kirschner wire into the tibia, and specifically in the embodiment of the utility model, two guide holes are provided, and the two guide holes correspond to two different Kirschner wires respectively. Based on the above structure, the present application designs and manufactures the main guide plate and the auxiliary positioning plate according to the CT data of the proximal end of the tibia before the operation, so that the curved surfaces of the two are aligned with the bone surface of the tibia. When in use, the medical staff sets the main guide plate and the auxiliary positioning plate at the preset position of the tibia, and uses the three-dimensional structure of the bone surface above the patellar tendon insertion point of the tibial tubercle to confirm the position of the auxiliary positioning plate, and combines the three-dimensional structure of the bone surface in the osteotomy area to confirm the position of the main guide plate. The two are simultaneously attached to the patient's tibia to achieve accurate positioning of the 3D printed guide plate using multiple planes, and the distance mark and axis of the main guide plate are used for calibration at the same time. Then, the Kirschner wire is set using the positioned main guide plate to ensure accurate positioning of the operation. In this way, the 3D printed guide plate of the present application is small in size and not easily blocked by soft tissue, and multiple planes are used to complete the guidance and positioning of the Kirschner wire, thereby improving the accuracy of positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is one of the schematic diagrams of the 3D printed guide plate structure for high tibial osteotomy of the utility model;

[0019] Figure 2This is the second structural schematic diagram of the 3D printed guide plate for high tibial osteotomy of the utility model;

[0020] Figure 3 This is the third structural schematic diagram of the 3D printed guide plate for high tibial osteotomy of the utility model;

[0021] Figure 4 This is one of the schematic diagrams of the use of the 3D printed guide plate for high tibial osteotomy of the utility model;

[0022] Figure 5 This is the second schematic diagram of the use of the 3D printed guide plate for high tibial osteotomy of the utility model;

[0023] Figure 6 This is the third schematic diagram of the use of the 3D printed guide plate for high tibial osteotomy of the utility model.

[0024] In the figure, 1. main guide plate; 2. auxiliary positioning plate; 3. connecting piece; 4. guide hole; 5. guide column; 6. Kirschner wire. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] It should be understood that the terms "front", "rear", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, "front" information may also be referred to as "rear" information, and "rear" information may also be referred to as "front" information without departing from the scope of the present invention.

[0027] like Figures 1 to 6 As shown, the utility model provides a 3D printed guide plate for high tibial osteotomy, comprising a main plate 1, an auxiliary positioning plate 2 and a connecting piece 3, wherein the main plate 1 and the auxiliary positioning plate 2 are arranged close to the patient's tibia, and the connecting piece 3 is respectively connected to the two as a whole to realize the effective connection between the main plate 1 and the auxiliary positioning plate 2, the main plate 1 is arranged close to the proximal end of the patient's tibia, and the auxiliary positioning plate 2 is located at the tibial attachment point of the patient's patellar ligament, further, a guide hole 4 is provided on the surface of the main plate 1, and medical staff can locate through the guide hole 4 and insert a Kirschner wire 6 into the tibia, specifically in the embodiment of the utility model, there are two guide holes 4, and the two guide holes 4 correspond to two different Kirschner wires 6, and the diameter of the Kirschner wire 6 is 1.5 mm.

[0028] Based on the above structure, the present application designs and manufactures the main plate 1 and the auxiliary positioning plate 2 according to the CT data of the proximal end of the tibia before the operation, so that the three-dimensional curved surfaces of the two are fitted with the tibial bone surface. When in use, the medical staff sets the main plate 1 and the auxiliary positioning plate 2 at the preset position of the tibia, and uses the bone surface above the patellar tendon insertion point of the tibial tubercle to confirm the position of the auxiliary positioning plate 2, and confirms the position of the main plate 1 in combination with the bone surface of the osteotomy area and the axis and mark of the main plate. The two are simultaneously attached to the patient's tibia to achieve accurate positioning of the 3D printed guide plate using multiple planes, and then the positioning of the Kirschner wire 6 is set using the positioned main plate 1 to ensure accurate positioning of the operation. In this way, the 3D printed guide plate of the present application is small in size and not easily blocked by soft tissue, and the guidance and positioning of the Kirschner wire 6 are completed using multiple planes at the same time, and the positioning accuracy is higher and the structure is simpler.

[0029] It should be noted that in order to strengthen the positioning of the auxiliary positioning plate 2 on the main plate 1, the present application further sets a plurality of auxiliary positioning plates 2 and connects them to the main plate 1 through the connector 3 respectively. Based on the above structure, the plurality of auxiliary positioning plates 2 are arranged in a curved surface close to the three-dimensional structure of the tibial tuberosity bone surface of the patient and are located at the tibial attachment point of the patient's patellar ligament. The plurality of auxiliary positioning plates 2 can cooperate with each other to realize the positioning operation of the main plate 1, further improve the positioning accuracy and reduce the use error; and due to the positioning of the plurality of auxiliary positioning plates 2, the setting position of the main plate 1 has been effectively fixed. The present application can also confirm the setting area of ​​the Kirschner wire 6 through the fixed main plate 1, further eliminating the positioning process of the Kirschner wire and improving the operation efficiency.

[0030] Optionally, in some embodiments of the present application, the main plate 1 is arranged in a square shape, and its side length is preferably 25 mm, which is conducive to controlling the size of the main plate 1 and thus reducing the volume of the main plate 1. Its long axis is parallel to the long axis of the tibia, and is supplemented by an identification mark of the distance from the guide hole to the proximal articular surface of the tibia to facilitate positioning. At the same time, the two guide holes 4 for setting Kirschner wires 6 located in the middle of the main plate 1 enable the main plate 1 to realize the setting of Kirschner wires 6. The present application can use two Kirschner wires 6 to locate the osteotomy plane designed before surgery.

[0031] Furthermore, the surface of the main guide plate 1 is also provided with an identification mark to mark the distance between the guide hole 4 of the Kirschner wire 6 and the proximal bone surface of the tibia. This distance is set based on the patient's condition and is generally set to 40-50 mm. The longitudinal axis of the square main guide plate 1 is parallel to the proximal axis of the tibia, which can facilitate medical staff to correct and thus facilitate positioning. Furthermore, in the embodiment of the utility model, the edge of the guide hole 4 protrudes outward to form a guide column 5, and the height of the guide column 5 is 5 mm. Based on the above structure, the provision of the guide column 5 can further enhance the guiding and limiting effect of the main guide plate 1 on the Kirschner wire 6, ensuring that the Kirschner wire 6 can accurately and stably reach and stay at the preset position.

[0032] Similar to the specifications of the main plate 1, in some embodiments of the present application, the auxiliary positioning plate 2 is arranged in a rectangular shape, the length of the auxiliary positioning plate 2 is preferably 15 mm, the width of the auxiliary positioning plate 2 is preferably 10 mm, and the three-dimensional curved surface of the auxiliary positioning plate 2 is designed according to the preoperative CT data of the proximal tibia, thereby ensuring that the three-dimensional structure of its surface is in close fit with the bone surface, thereby assisting the main plate 1 in positioning.

[0033] In addition, for the connecting member 3 of the present application, its width is preferably 6 mm, and the connecting member 3 is arranged in an arc shape, and its curvature makes it easy to bypass the obstruction of soft tissue.

[0034] In summary, the utility model provides a 3D printed guide plate for high tibial osteotomy, which includes a main plate, an auxiliary positioning plate and a connector, wherein the main plate and the auxiliary positioning plate are arranged close to the patient's tibial bone surface, and the connector is respectively connected to the two as a whole to achieve effective connection between the main plate and the auxiliary positioning plate, the main plate is arranged close to the patient's proximal tibial bone surface, and the auxiliary positioning plate is located at the tibial attachment point bone surface of the patient's patellar ligament, and the surface of the main plate is also provided with a guide hole, through which medical staff can locate and insert Kirschner wires into the tibia. Compared with the prior art, the 3D printed guide plate of the present application is small in size and not easily blocked by soft tissues, and multiple planes and multiple markings are used to complete the guidance and positioning of the Kirschner wires, with higher positioning accuracy and simpler structure.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A 3D printed guide plate for high tibial osteotomy, characterized in that: include: A main guide plate, wherein the main guide plate is arranged in a three-dimensional structure with a curved surface close to the patient's tibia bone surface and is located at the proximal end of the patient's tibia, and a guide hole is provided on the side of the main guide plate facing away from the patient's tibia, and the guide hole is used to insert a Kirschner wire into the tibia; An auxiliary positioning plate, wherein the auxiliary positioning plate is arranged in a curved surface close to the three-dimensional structure of the tibial tuberosity bone surface of the patient and is located at the tibial attachment point of the patient's patellar ligament; A connecting piece, wherein the connecting piece is arranged in an arc shape and connects the main plate and the auxiliary positioning plate into one body, There are multiple auxiliary positioning plates, and each of the auxiliary positioning plates is connected to the main plate through the connecting piece.

2. The 3D printed guide plate for high tibial osteotomy according to claim 1, characterized in that: There are two guide holes, which are arranged in sequence and each of which has a Kirschner wire in it.

3. The 3D printed guide plate for high tibial osteotomy according to claim 1, characterized in that: The main guide plate is provided with an identification mark, and the identification mark is used to display the distance from the guide hole to the proximal articular surface of the tibia.

4. The 3D printed guide plate for high tibial osteotomy according to claim 3, characterized in that: The edge of the guide hole protrudes outward to form a guide column, the guide column faces the direction of the fibula head, and the protruding height of the guide column is 5 mm.

5. The 3D printed guide plate for high tibial osteotomy according to claim 1, characterized in that: The main guide plate is arranged in a square shape, and its long axis is parallel to the tibial axis.

6. The 3D printed guide plate for high tibial osteotomy according to claim 5, characterized in that: The side length of the main conductor is 25 mm.

7. The 3D printed guide plate for high tibial osteotomy according to claim 1, characterized in that: The auxiliary positioning plate is arranged in a rectangular shape.

8. The 3D printed guide plate for high tibial osteotomy according to claim 7, characterized in that: The length of the auxiliary positioning plate is 15 mm, and the width of the auxiliary positioning plate is 10 mm.

Images