Manufacturing method of customizable magnetic implantation device based on 3D printing and magnetic implantation device

Abstract

The invention discloses a manufacturing method of a customizable magnetic implantation device based on 3D printing. The manufacturing method specifically comprises the following steps: S1, determining a damaged position of an articular surface of an affected finger so as to determine an implantation point and a magnetic core installation density of the device; s2, the appearance of the phalanx of the affected finger is collected, collected information is imported into three-dimensional modeling software for data processing, the positions of two guide holes in the guide plate and the diameter of the guide holes are designed according to the implantation point of the device and the damaged area of the articular surface of the affected finger, and a three-dimensional model about the guide plate is established; s3, designing a three-dimensional model about the master device; s4, data of the guide plate three-dimensional model and data of the main part three-dimensional model are imported into 3D printing equipment, printing is conducted through the three-dimensional printing technology, and the magnetic implantation device is manufactured. The method is easy to operate, customization can be carried out according to different patients, the obtained magnetic implantation device is high in precision, the articular surface friction of the patients can be improved, the joint does not need to be replaced, the device is implanted outside the damaged joint under micro-creation, and the purpose of keeping the joint is achieved.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and in particular to a method for manufacturing a customizable magnetic implant device based on 3D printing and a magnetic implant device. Background Art

[0002] Patients with hand arthritis can be clinically divided into many types, including rheumatoid arthritis, traumatic arthritis, osteoarthritis, etc. Different treatment methods should be used according to different symptoms. Once hand arthritis occurs, patients will feel local pain, which will be significantly aggravated after fatigue, cold, or joint movement. There will be slight swelling in the local area, and severe cases will affect joint movement, seriously affecting people's work and life.

[0003] At present, the treatment methods for arthritis are mainly joint fusion or joint replacement. Joint fusion is to lose the range of motion of the joint in exchange for pain-free hand joints, which will seriously affect the function of the hand. The research on small joint prostheses of the hand has not yet been mature and promoted. The hand joints are non-load-bearing joints. The main problem of arthritis for patients is pain. The main cause of pain is the friction of the joint surface and the stimulation of inflammatory factors. Therefore, how to reduce the friction of the joint surface and achieve the purpose of treating pain, not destroying the joint structure and retaining the range of motion of the joint through surgical methods and devices around the joint is an urgent problem to be solved. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in view of the shortcomings of the existing technology, a method for manufacturing a customizable magnetic implant device based on 3D printing is provided. The method is simple to operate and can be customized for different patients. The obtained magnetic implant device is not only highly accurate, but also can effectively improve the patient's joint surface friction. There is no need to replace the joint. The device can be implanted outside the damaged joint under minimally invasive conditions to achieve the purpose of preserving the joint.

[0005] In order to solve the above technical problems, the technical solution of the present invention is:

[0006] A method for manufacturing a customizable magnetic implant device based on 3D printing, comprising the following steps:

[0007] S1: Use imaging examinations such as CT three-dimensional reconstruction or MRI examination or intraoperative micro-arthroscopy to determine the location of the joint damage on the affected finger to determine the implantation point of the device and the density of the magnetic core installation;

[0008] S2: The shape of the phalanx of the affected finger is collected through three-dimensional reconstruction images, and the collected information is imported into the three-dimensional modeling software for data processing, so as to design the shape of the guide plate in a personalized manner, and the positions and diameters of the two guide holes on the guide plate are designed according to the implantation point of the implant device determined in step S1 and the damaged area of ​​the joint surface of the affected finger, and a three-dimensional model of the guide plate is established;

[0009] S3: Upload the guide hole diameter size on the guide plate, the shape of the affected finger and the determined magnetic core installation density information to the 3D modeling software for data processing to design a 3D model of the main component;

[0010] S4: Importing the three-dimensional model of the guide plate and the three-dimensional model of the main component established above into a 3D printing device respectively, and printing them through three-dimensional printing technology to obtain a magnetic implant device.

[0011] Preferably, in step S2, the appearance information of the phalanx of the affected finger includes finger shape, circumference, and presence or absence of deformity.

[0012] Preferably, in step S2, the data processing further includes designing guide needle grooves on both sides of the guide hole on the guide plate.

[0013] Preferably, in step S3, the data processing includes designing the diameter size and the length of the first fixing column on the main component according to the designed guide hole size and the shape of the affected finger, determining the arrangement of the first magnetic core placement hole on the first fixing column of the main component according to the magnetic core installation density, and designing the shape of the first metal gasket on the main component according to the shape of the affected finger.

[0014] Preferably, in step S3, the data processing further includes designing the position and size of the mounting hole on the first metal gasket and the position and size of the absorbable fixation bone pin insertion hole according to the shape of the affected finger.

[0015] Preferably, in step S3, the data processing also includes the design of growth holes on the main component.

[0016] In order to better solve the above technical problems, the present invention also discloses the following technical solutions:

[0017] A magnetic implantation device comprises a guide plate, a main component, a magnetic lock core and a main component mold, wherein the guide plate is provided with two guide holes, the main component comprises a first fixing column and a first metal gasket connected to the first fixing column, the first fixing column is provided with a plurality of first magnetic core placement holes, the diameter of the first magnetic lock core is adapted to the diameter of the first magnetic core placement hole, and the first metal gasket is provided with a mounting hole; the main component mold comprises a second fixing column and a second metal gasket connected to the second fixing column, the second fixing column is provided with a plurality of second magnetic core placement holes, the first fixing column and the second fixing column have the same shape and size, and the first magnetic core placement hole and the second magnetic core placement hole have the same structure.

[0018] Preferably, the guide plate is provided with two guide needle grooves, and the two guide needle grooves are symmetrically arranged with the center line of the two guide holes as the axis.

[0019] Preferably, scale lines are provided at both guide needle grooves.

[0020] Preferably, the first metal gasket and the first fixing column are both provided with a plurality of growth holes.

[0021] Preferably, the first metal gasket is also provided with a plurality of absorbable fixation bone pin insertion holes.

[0022] A method of using a magnetic implant device is as follows:

[0023] A: X-ray examination is used to collect the value of the patient's normal finger joint gap, and then external force is applied to the patient's affected finger to measure the pulling force required when the joint gap of the affected finger reaches the normal gap value, which is the magnetic field force required for the implanted device;

[0024] B: Select the implantation site based on the accurate positioning of the site of severe joint surface injury or narrow joint space before surgery. When implanting, make an incision on the lateral or dorsal side to avoid the tendon insertion point. Fix the guide plate to the side of the finger by invasive needle insertion or non-invasive method. Under the guidance of the guide hole on the guide plate, use a micro-power drill to drill a hole in the phalanx of the affected finger. Confirm through fluoroscopy that the bone canal is parallel, which is the implantation hole of the main part.

[0025] C: Select a certain magnetic field force coefficient and the number of magnetic lock cores that can be transparently developed according to the magnetic field force determined above; place the magnetic lock core into the second magnetic core placement hole on the main component mold and then place it into the implantation hole of the main component together with the main component mold, and determine whether the position of the magnetic lock core is located at the narrow joint gap, whether the joint gap is opened to an ideal distance, and whether the movable joint has no friction, thereby effectively adjusting the distribution of the magnetic lock core;

[0026] D: Take out the main component mold, and place the magnetic lock core into the first magnetic core placement hole on the first fixing column of the main component according to the above-mentioned magnetic lock core distribution. Then place the first fixing column into the implantation hole of the main component. After confirming the position through X-ray, pass the fixing screw through the mounting hole on the first metal gasket, and fix the absorbable fixation bone needle through the absorbable fixation bone needle insertion hole. Then suture the skin wound to complete.

[0027] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0028] The present invention discloses a method for manufacturing a customizable magnetic implant device based on 3D printing. The method determines the implantation point of the implant device, the magnetic core installation density, etc. by determining the appearance information of the patient's affected finger, the position of the articular surface damage of the patient's affected finger, the size of the damage area, and other information, and then designs a personalized guide plate, a main part, and a mold. The materials of different parts are selected according to functional requirements, and the magnetic implant device is printed out using 3D printing technology. The method is simple to operate. When the prepared magnetic implant device is used to treat a patient's damaged joint, there is no need to replace the patient's joint, and only minimally invasive implantation is required. Without affecting the patient's hand function, the friction of the patient's articular surface is effectively reduced, and joint pain is reduced.

[0029] The present invention also discloses a magnetic implant device, including a guide plate, a main part, a magnetic lock core and a main part mold, wherein two guide holes are arranged on the guide plate, the main part includes a first fixing column and a first metal gasket connected to the first fixing column, a plurality of first magnetic core placement holes are arranged on the first fixing column, the diameter of the magnetic lock core is adapted to the diameter of the first magnetic core placement hole and can be fixed and locked, and a mounting hole is arranged on the first metal gasket. During implantation, the implantation hole of the main part is determined by the guide plate, the number of magnetic lock cores is determined by the determined magnetic field force, the magnetic lock core is placed in the main part mold, and the magnetic lock core is determined by perspective whether the position of the magnetic lock core is located at the narrow joint gap, whether the joint gap is stretched to an ideal distance, and whether the active joint has no friction, so as to effectively adjust the distribution of the magnetic lock core, after determining the arrangement of the magnetic lock core, the magnetic lock core is inserted into the first fixing column according to the same arrangement and locked, and then the first fixing column is placed in the implantation hole of the main part, and after the perspective confirms the position, the fixing screw is passed through the mounting hole on the first metal gasket for fixing, and the above-mentioned magnetic implant device can effectively support the joint gap and reduce the friction of the joint surface of the patient's affected finger. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0031] Figure 1 It is a structural schematic diagram of a guide plate of a magnetic implant device;

[0032] Figure 2 It is a schematic diagram of the structure of the main components of the magnetic implant device;

[0033] Figure 3 This is a schematic diagram of the structure of the main mold;

[0034] Figure 4 It is a structural schematic diagram of a magnetic lock core;

[0035] Figure 5 It is a schematic diagram of the structure of the magnetic implant device after implantation;

[0036] In the figure, 1. guide plate; 2. main part; 3. magnetic lock core; 4. main part mold; 5. guide hole; 6. first metal gasket; 7. first fixing column; 8. first magnetic core placement hole; 9. mounting hole; 10. guide needle groove; 11. scale line; 12. growth hole; 13. absorbable fixation bone needle insertion hole; 14. second fixing column; 15. second metal gasket; 16. second magnetic core placement hole; 17. joint capsule; 18. joint surface; 19. joint cavity. DETAILED DESCRIPTION

[0037] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0038] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0039] Example 1

[0040] like Figures 1 to 4 As shown, a magnetic implantation device includes a guide plate 1, a main part 2, a magnetic lock core 3 and a main part mold 4, wherein the guide plate 1 is provided with two guide holes 5, the main part 2 includes a first fixing column 7 and a first metal gasket 6 connected to the first fixing column 7, the first fixing column 7 is provided with a plurality of first magnetic core placement holes 8, the diameter of the magnetic lock core 3 is adapted to the diameter of the first magnetic core placement hole 8, and the first metal gasket 6 is provided with a mounting hole 9; the main part mold 4 includes a second fixing column 14 and a second metal gasket 15 connected to the second fixing column 14, the second fixing column 14 is provided with a plurality of second magnetic core placement holes 16, the first fixing column 7 and the second fixing column 14 have the same shape and size, and the first magnetic core placement hole 8 and the second magnetic core placement hole 16 have the same structure.

[0041] Furthermore, in this embodiment, a guide needle groove 10 is provided on the guide plate 1 to facilitate subsequent fixing of the guide plate 1 by invasive needle insertion, thereby facilitating the drilling of an implantation hole for the main component 2 .

[0042] Furthermore, in the present embodiment, scale lines 11 are provided on the two guide needle grooves 10 to facilitate adjusting the distance between adjacent guide needle holes when drilling guide needle holes in the guide needle grooves 10 .

[0043] Furthermore, a plurality of growth holes 12 are provided on the first metal gasket 6 and the first fixing column 7, which are beneficial for tissue growth after implantation.

[0044] Furthermore, the first metal gasket 6 is provided with a plurality of absorbable fixation bone pin insertion holes 13 to improve the fixation stability of the device.

[0045] The present invention also discloses a method for preparing a magnetic implant device, and the specific scheme is as follows:

[0046] A method for manufacturing a customizable magnetic implant device based on 3D printing, comprising the following steps:

[0047] S1: Use imaging examinations such as CT three-dimensional reconstruction or MRI examination or intraoperative micro-arthroscopy to determine the location of the joint damage on the affected finger to determine the implantation point of the device and the density of the magnetic core installation;

[0048] S2: The shape of the phalanx of the affected finger is collected through three-dimensional reconstruction images, and the collected information is imported into the three-dimensional modeling software for data processing, so as to design the shape of the guide plate in a personalized manner, and the positions and diameters of the two guide holes on the guide plate are designed according to the implantation point of the implant device determined in step S1 and the damaged area of ​​the joint surface of the affected finger, and a three-dimensional model of the guide plate is established;

[0049] S3: Upload the guide hole diameter size on the guide plate, the shape of the affected finger and the determined magnetic core installation density information to the 3D modeling software for data processing to design a 3D model of the main component;

[0050] S4: Importing the three-dimensional model of the guide plate and the three-dimensional model of the main component established above into a 3D printing device respectively, and printing them through three-dimensional printing technology to obtain a magnetic implant device.

[0051] Furthermore, in step S2, the appearance information of the phalanx of the affected finger includes finger shape, circumference, and presence or absence of deformity.

[0052] Furthermore, in step S2, the data processing also includes designing guide needle grooves on both sides of the guide hole on the guide plate.

[0053] Furthermore, in step S3, the data processing is to design the diameter size and the length of the first fixing column on the main component according to the designed guide hole size and the shape of the affected finger, determine the arrangement of the first magnetic core placement hole on the first fixing column of the main component according to the magnetic core installation density, and determine the shape of the first metal gasket of the main component according to the shape of the affected finger.

[0054] Preferably, in step S3, the data processing further includes designing the position and size of the mounting hole on the first metal gasket and the position and size of the absorbable fixation bone pin insertion hole according to the shape of the affected finger.

[0055] Preferably, in step S3, the data processing also includes the design of growth holes on the main component.

[0056] Specifically, when printing, the material of the metal gasket can be selected from materials with good biocompatibility, which can be dissolved later, and there will be fewer subcutaneous foreign bodies, which can effectively reduce skin ulcers, infections, and discomfort caused by foreign body stimulation. The material of the guide plate is selected to be strong in rigidity and weak in elasticity, which is more in line with the anatomical structure of the phalanges, so as to facilitate the precise implantation of the main part.

[0057] Specifically, the method of using the magnetic implant device is as follows:

[0058] A: X-ray examination is used to collect the value of the patient's normal finger joint gap, and then external force is applied to the patient's affected finger to measure the pulling force required when the joint gap of the affected finger reaches the normal gap value, which is the magnetic field force required for the implanted device;

[0059] B: Select the implantation point based on the accurate positioning of the site of severe joint surface injury or joint space narrowing before surgery. When implanting, make an incision on the lateral or dorsal side to avoid the tendon insertion point. Take the case of narrow joint space as an example: choose the lateral incision of the finger that is not visible to the public and is not a friction surface. Fix the guide plate to the side of the finger by invasive needle insertion or non-invasive method. Under the guidance of the guide hole on the guide plate, use a micro-power drill to drill a hole in the phalanx of the affected finger. Confirm through fluoroscopy that the bone canal is parallel, which is the implantation hole of the main component.

[0060] C: Select a certain magnetic field force coefficient and the number of magnetic lock cores that can be transparently developed according to the magnetic field force determined above; place the magnetic lock core into the second magnetic core placement hole on the main component mold and then place it into the implantation hole of the main component together with the main component mold, and determine whether the position of the magnetic lock core is located at the narrow joint gap, whether the joint gap is opened to an ideal distance, and whether the movable joint has no friction, thereby effectively adjusting the distribution of the magnetic lock core;

[0061] D: Take out the main part mold, and according to the above magnetic lock core distribution, place the magnetic lock core into the first magnetic core placement hole on the first fixing column of the main part and lock it. Then place the first fixing column into the implantation hole of the main part. After confirming the position through perspective, fix the fixing screw through the installation hole on the first metal gasket and then suture the skin wound. Figure 5 shown.

[0062] In the above scheme, the surface of the main part mold is smooth and the material is a non-developing material, and the surface of the main part is rough and it is made of metal and is a developing material.

[0063] When in use, the magnetic implant device is buried under the skin, and under the action of the two main parts 2, the joint cavity 19 composed of the joint capsule 17 and the joint surface 18 is expanded to reduce joint friction.

[0064] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal expression of the claims, or if they include equivalent structural elements that are not substantially different from the literal expression of the claims, then these other embodiments should also be included in the scope of the claims.

Claims

1. A method for manufacturing a customizable magnetic implant device based on 3D printing, characterized in that: The following steps are involved: S1: Determine the location of the joint damage on the affected finger to determine the implantation point of the device and the density of the magnetic core installation; S2: The shape of the phalanx of the affected finger is collected through three-dimensional reconstruction images, and the collected information is imported into the three-dimensional modeling software for data processing, so as to design the shape of the guide plate in a personalized manner, and the positions and diameters of the two guide holes on the guide plate are designed according to the implantation point of the implant device determined in step S1 and the damaged area of ​​the joint surface of the affected finger, and a three-dimensional model of the guide plate is established; S3: Upload the guide hole diameter size on the guide plate, the shape of the affected finger and the determined magnetic core installation density information to the 3D modeling software for data processing to design a 3D model of the main component; S4: Importing the three-dimensional model of the guide plate and the three-dimensional model of the main component established above into a 3D printing device respectively, and printing them through three-dimensional printing technology to obtain a magnetic implant device.

2. The method for manufacturing a customizable magnetic implant device based on 3D printing according to claim 1, characterized in that: In step S1, the method for determining the location of the lesion on the joint surface of the affected finger includes using imaging examination CT three-dimensional reconstruction or MR examination or intraoperative micro-arthroscopy.

3. The method for manufacturing a customizable magnetic implant device based on 3D printing according to claim 1, characterized in that: In step S2, the appearance information of the phalanx of the affected finger includes the shape, circumference, and deformity of the finger.

4. The method for manufacturing a customizable magnetic implant device based on 3D printing according to claim 1, characterized in that: In step S2, the data processing further includes designing guide needle grooves on both sides of the guide hole on the guide plate.

5. The method for manufacturing a customizable magnetic implant device based on 3D printing according to claim 1, characterized in that: In step S3, the data processing includes designing the diameter size and the length of the first fixing column on the main component according to the designed guide hole size and the shape of the affected finger, determining the arrangement of the first magnetic core placement hole on the first fixing column of the main component according to the magnetic core installation density, and determining the shape of the first metal gasket of the main component according to the shape of the affected finger.

6. The method for manufacturing a customizable magnetic implant device based on 3D printing according to claim 1, characterized in that: In step S3, the data processing further includes designing the position and size of the mounting hole on the first metal gasket and the position and size of the absorbable fixation bone pin insertion hole according to the shape of the affected finger.

7. The method for manufacturing a customizable magnetic implant device based on 3D printing according to claim 1, characterized in that: In step S3, the data processing also includes the design of the growth holes on the main part.

8. The magnetic implant device obtained by the method according to any one of claims 1 to 7, characterized in that: It includes a guide plate, a main part, a magnetic lock core and a main part mold, wherein the guide plate is provided with two guide holes, the main part includes a first fixing column and a first metal gasket connected to the first fixing column, the first fixing column is provided with a plurality of first magnetic core placement holes, the diameter of the first magnetic lock core is adapted to the diameter of the first magnetic core placement hole, and the first metal gasket is provided with a mounting hole; the main part mold includes a second fixing column and a second metal gasket connected to the second fixing column, the second fixing column is provided with a plurality of second magnetic core placement holes, the first fixing column and the second fixing column have the same shape and size, and the first magnetic core placement hole and the second magnetic core placement hole have the same structure.

9. The magnetic implant device obtained by the method according to claim 8, characterized in that: The guide plate is provided with two guide needle grooves, which are symmetrically arranged with the center line of the two guide holes as the axis; and scale lines are provided at the two guide needle grooves.

10. The magnetic implant device obtained by the method according to claim 8, characterized in that: The first metal gasket and the first fixing column are both provided with a plurality of growth holes; and / or the first metal gasket is also provided with a plurality of absorbable fixation bone pin insertion holes.

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