3D Printing-Based Prosthetic Shaping Methods

Abstract

This invention discloses a 3D-printed prosthesis shaping method, relating to the field of prosthesis manufacturing. The method includes: S1 obtaining reference information and limb information; S2 constructing a reference model and retaining the limb model; S3 refining the reference model to obtain an appearance model; S4 extracting the main body model; S5 adjusting the size of the main body model; S6 3D printing the main body model to obtain a supporting body; S7 3D printing the appearance model to obtain an appearance body; S8 creating a plaster mold of the appearance body; S9 dividing the plaster mold to obtain a sub-mold; S10 placing the supporting body inside the sub-mold; S11 merging and splicing the sub-molds; and S12 injecting a liquid flexible material into the plaster mold, which solidifies to obtain the prosthesis. By obtaining limb information at the location of the prosthesis to be installed and adjusting the reference model based on this information, the method realizes the personalized needs of amputees for prostheses, fundamentally improving the wearing comfort and aesthetics of the prosthesis, and significantly promoting the psychological recovery of confidence in amputees. It also significantly reduces the manufacturing cost and time of the prosthesis.

Description

Technical Field

[0001] This invention relates to the field of prosthetic manufacturing, and more particularly to a prosthetic shaping method based on 3D printing. Background Technology

[0002] In this era of advanced technology, current medical technology demands not only excellent treatment outcomes but also comprehensive post-treatment rehabilitation assistance. Prosthetics are widely used as a rehabilitation tool, and their rapid advancements not only save lives but also provide additional benefits. For example, individuals with limb disabilities often suffer severe psychological trauma, coupled with significant limitations in movement, leading to a loss of employment opportunities and recreational activities compared to able-bodied individuals. Prosthetics not only increase mobility but also improve appearance and clothing comfort (most commercially available trousers are two-legged). Therefore, prosthetics have become a crucial tool for compensating for physical defects. However, current prosthetic manufacturing processes are complex, requiring multiple fittings and adjustments by the patient, a time-consuming process with a low degree of fit. Summary of the Invention

[0003] The purpose of this invention is to design a 3D printing-based prosthesis shaping method to solve the above problems.

[0004] The present invention achieves the above objectives through the following technical solutions:

[0005] 3D printing-based prosthetic shaping methods include:

[0006] S1. Scan to obtain reference information of the prosthesis and limb information at the location where the prosthesis will be installed;

[0007] S2. Construct a reference model based on the reference information, and construct a retained limb model based on the limb information;

[0008] S3. Analyze the remaining limb model and reference model, and adjust the position of the reference model and the prosthesis to be installed to obtain the appearance model;

[0009] S4. Extract the main body model required for the prosthesis from the database;

[0010] S5. Adjust the dimensions of the main model according to the position and size of the appearance model;

[0011] S6. Print the main body model using a 3D printer to obtain the supporting body;

[0012] S7. Print the appearance model using a 3D printer to obtain the appearance body;

[0013] S8. A plaster mold is made by wrapping plaster around the outer body;

[0014] S9. Divide the plaster mold into at least two sub-molds and remove the outer body;

[0015] S10. Use support rods or support blocks to fix the support body in one of the sub-molds;

[0016] S11. Combine the remaining sub-molds with this sub-mold to form a plaster mold;

[0017] S12. Heat the flexible material to a liquid state and inject the liquid flexible material into the plaster mold. After the flexible material solidifies, open the plaster mold to remove the completed prosthesis.

[0018] The beneficial effects of this invention are as follows: by acquiring limb information at the location of the prosthesis to be installed and adjusting the reference model according to the limb information, the personalized needs of amputees for prostheses are realized, fundamentally improving the wearing comfort and aesthetics of the prosthesis, and significantly promoting the restoration of confidence in amputees; it also significantly reduces the manufacturing cost and cycle of prostheses, freeing prosthetists from heavy physical labor, and the process is environmentally friendly and pollution-free. Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating the 3D printing-based prosthesis shaping method of this invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0027] like Figure 1 As shown, the 3D printing-based prosthetic shaping method includes:

[0028] S1. Scan to obtain reference information for the prosthesis and limb information at the location where the prosthesis will be installed; when the patient has unilateral limb loss, the reference information is the data of the healthy limb on the patient's healthy side; when the patient has bilateral limb loss, the reference information is the data of the reference limb selected by the patient.

[0029] S2. Construct a reference model based on the reference information, and construct a limb model to be retained based on the limb information. The length of the reference model is greater than the length of the prosthesis to be made.

[0030] S3. Analyze the retained limb model and reference model, and adjust the position of the reference model and the prosthesis to be installed to obtain the appearance model, so that the appearance model fits the retained limb on the missing side of the patient better and ensures the best wearing comfort. If it is a unilateral limb loss, the healthy side limb is directly used for modeling to achieve the most coordinated size and ensure the visual harmony between the prosthesis and the healthy limb.

[0031] S4. Extract the main body model required for the prosthesis from the database;

[0032] S5. Adjust the dimensions of the main model according to the position and size of the appearance model;

[0033] S6. Print the main body model using a 3D printer to obtain the supporting body;

[0034] S7. Print the appearance model using a 3D printer to obtain the appearance body;

[0035] S8. A plaster mold is made by wrapping plaster around the outer body;

[0036] S9. Divide the plaster mold into at least two sub-molds and remove the outer body;

[0037] S10. Use support rods or support blocks to fix the support body in one of the sub-molds;

[0038] S11. Combine the remaining sub-molds with this sub-mold to form a plaster mold;

[0039] S12. Heat the silicone rubber to a liquid state and inject the liquid silicone rubber into the plaster mold. After the flexible material solidifies, open the plaster mold to remove the completed prosthesis.

[0040] By acquiring limb information at the location of the prosthesis to be installed and adjusting the reference model based on the limb information, the personalized needs of amputees for prostheses are realized, fundamentally improving the wearing comfort and aesthetics of the prosthesis, and significantly promoting the psychological recovery of confidence in amputees; it also significantly reduces the manufacturing cost and cycle of prostheses, freeing prosthetists from heavy physical labor, and the process is environmentally friendly and pollution-free.

[0041] The technical solutions of the present invention are not limited to the specific embodiments described above. Any technical modifications made in accordance with the technical solutions of the present invention fall within the protection scope of the present invention.

Claims

1. A method for prosthetic limb reshaping based on 3D printing, characterized in that, include: S1. Scan to obtain reference information of the prosthesis and limb information at the location where the prosthesis will be installed; S2. Construct a reference model based on the reference information, and construct a retained limb model based on the limb information; S3. Analyze the remaining limb model and reference model, and adjust the position of the reference model and the prosthesis to be installed to obtain the appearance model; S4. Extract the main body model required for the prosthesis from the database; S5. Adjust the dimensions of the main model according to the position and size of the appearance model; S6. Print the main body model using a 3D printer to obtain the supporting body; S7. Print the appearance model using a 3D printer to obtain the appearance body; S8. A plaster mold is made by wrapping plaster around the outer body; S9. Divide the plaster mold into at least two sub-molds and remove the outer body; S10. Use support rods or support blocks to fix the support body in one of the sub-molds; S11. Combine the remaining sub-molds with this sub-mold to form a plaster mold; S12. Heat the flexible material to a liquid state and inject the liquid flexible material into the plaster mold. After the flexible material solidifies, open the plaster mold to remove the completed prosthesis.

2. The 3D printing-based prosthesis shaping method according to claim 1, characterized in that, In S1, when a patient has unilateral limb loss, the reference information is the data of the healthy limb on the patient's healthy side; when a patient has bilateral limb loss, the reference information is the data of the reference limb selected by the patient.

3. The 3D printing-based prosthesis shaping method according to claim 1, characterized in that, The flexible material is silicone rubber.

Images