3D-printed adjustable femoral hemi-arthroplasty

Abstract

The utility model relates to the technical field of joint prosthesis, disclose 3D printing adjustable femur half joint prosthesis, including joint prosthesis one, the inner wall rotation of joint prosthesis one is connected with the rotating ring, the inner wall of rotating ring is provided with auxiliary assembly, the lower surface fixed connection of auxiliary assembly is in the upper surface of joint prosthesis one, the inner wall sliding connection of rotating ring has screw tooth, the inner wall fixed connection of screw tooth has transmission column, the outer wall fixed connection of transmission column has joint prosthesis two, the outer wall fixed connection of joint prosthesis two has joint prosthesis three. In the utility model, since transmission column and joint prosthesis two are fixedly connected, so when transmission column moves up and down, will drive joint prosthesis two to move up and down, and then drive joint prosthesis three to move, and then realize length adjustment to prosthesis, make medical staff can flexibly adjust the length of prosthesis according to patient's own demand, improve the effect of prosthesis applicability.

Description

Technical Field

[0001] This utility model relates to the field of joint prosthesis technology, and in particular to a 3D-printed adjustable femoral hemiarthroplasty prosthesis. Background Technology

[0002] Joint prostheses are artificial medical devices used to replace damaged or diseased joints in the human body. Their main purpose is to relieve joint pain, restore normal joint function, and improve the patient's quality of life. For example, for patients with end-stage knee osteoarthritis, artificial knee prostheses can replace worn and deformed knee joints, allowing patients to regain their ability to walk normally.

[0003] Existing femoral hemiarthroplasty prostheses typically employ a modular structure, consisting of multiple combinable components. This allows surgeons to flexibly select and combine different components based on the patient's specific condition and surgical needs. However, they lack the function of length adjustment for the femoral hemiarthroplasty prosthesis. This makes it difficult for surgeons to accurately select a prosthesis that perfectly matches the patient's femoral length, significantly reducing the applicability of the femoral hemiarthroplasty prosthesis. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a 3D-printed adjustable femoral hemiarthroplasty prosthesis, which aims to improve the problem that existing femoral hemiarthroplasty prostheses do not have the function of length adjustment, thus reducing the applicability of the femoral hemiarthroplasty prosthesis.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A 3D-printed adjustable femoral hemiarthroplasty prosthesis includes a first joint prosthesis, a rotating ring rotatably connected to the inner wall of the first joint prosthesis, an auxiliary component provided on the inner wall of the rotating ring, the lower surface of the auxiliary component fixedly connected to the upper surface of the first joint prosthesis, a threaded tooth slidably connected to the inner wall of the rotating ring, a transmission column fixedly connected to the inner wall of the threaded tooth, a second joint prosthesis fixedly connected to the outer wall of the transmission column, and a third joint prosthesis fixedly connected to the outer wall of the second joint prosthesis.

[0007] Preferably, the auxiliary component includes a ball bearing, the inner wall of the rotating ring is slidably connected to the outer wall of the ball bearing, the outer wall of the ball bearing is slidably connected to a connecting block, and the lower surface of the connecting block is fixedly connected to the upper surface of the joint prosthesis.

[0008] Preferably, the inner wall of the rotating ring is provided with a threaded groove, and the threaded teeth are slidably connected to the inner wall of the rotating ring through the threaded groove.

[0009] Preferably, the inner wall of the joint prosthesis is provided with a groove.

[0010] Preferably, both the first joint prosthesis and the second joint prosthesis include an adhesive layer, a reinforcing layer, and a composite layer.

[0011] Preferably, the bonding layer is made of titanium alloy.

[0012] Preferably, the reinforcing layer is made of alumina ceramic.

[0013] Preferably, the composite layer is made of polyethylene.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, the rotating ring is rotated first. When the rotating ring rotates, it will drive the threaded teeth to move up and down through the threaded groove opened on the inner wall of the rotating ring, which will further drive the transmission column to move up and down. Since the transmission column and the second joint prosthesis are fixedly connected, when the transmission column moves up and down, it will drive the second joint prosthesis to move up and down, which in turn will drive the third joint prosthesis to move, thereby realizing the length adjustment of the prosthesis. This allows medical staff to flexibly adjust the length of the prosthesis according to the patient's own needs, thereby improving the applicability of the prosthesis.

[0016] 2. In this utility model, the fixing effect between the bonding layer, the reinforcing layer and the composite layer can improve the overall strength of the joint prosthesis and its affinity with human tissue, thereby improving the patient's comfort during use. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the 3D-printed adjustable femoral hemiarthroplasty prosthesis proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of a partial groove structure of the 3D-printed adjustable femoral hemiarthroplasty prosthesis proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the ball bearing structure of the 3D-printed adjustable femoral hemiarthroplasty prosthesis proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the rotating ring of the 3D-printed adjustable femoral hemiarthroplasty prosthesis proposed in this utility model.

[0021] Figure 5 This is a schematic cross-sectional view of the bonding layer structure of the 3D-printed adjustable femoral hemiarthroplasty prosthesis proposed in this utility model.

[0022] Legend:

[0023] 1. Joint prosthesis one; 2. Rotating ring; 3. Ball bearing; 4. Connecting block; 5. Transmission column; 6. Joint prosthesis two; 7. Joint prosthesis three; 8. Threaded groove; 9. Threaded tooth; 10. Groove; 11. Adhesive layer; 12. Reinforcing layer; 13. Composite layer. Detailed Implementation

[0024] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Reference Figures 1-3 An embodiment of this utility model is provided: a 3D-printed adjustable femoral hemiarthroplasty prosthesis, including a joint prosthesis 1, a rotating ring 2 rotatably connected to the inner wall of the joint prosthesis 1, an auxiliary component provided on the inner wall of the rotating ring 2, the lower surface of the auxiliary component being fixedly connected to the upper surface of the joint prosthesis 1, a threaded tooth 9 slidably connected to the inner wall of the rotating ring 2, a transmission column 5 fixedly connected to the inner wall of the threaded tooth 9, a joint prosthesis 2 6 fixedly connected to the outer wall of the transmission column 5, and a joint prosthesis 3 7 fixedly connected to the outer wall of the joint prosthesis 2 6.

[0026] Specifically, joint prosthesis 1 is used to support the rotation of rotating ring 2, and auxiliary components are used to assist the rotation of rotating ring 2. When rotating ring 2 rotates, it will drive threaded teeth 9 to move up and down. Through the fixing effect of threaded teeth 9 and transmission column 5, it will drive transmission column 5 to move up and down. Through the fixing effect of transmission column 5 and joint prosthesis 2 6, it will drive joint prosthesis 2 6 to move up and down, thereby achieving the effect of length adjustment of femoral prosthesis.

[0027] Reference Figures 2-4 The auxiliary components include a ball bearing 3, the inner wall of a rotating ring 2 is slidably connected to the outer wall of the ball bearing 3, a connecting block 4 is slidably connected to the outer wall of the ball bearing 3, and the lower surface of the connecting block 4 is fixedly connected to the upper surface of the joint prosthesis 1; the inner wall of the rotating ring 2 is provided with a threaded groove 8, and the threaded teeth 9 are slidably connected to the inner wall of the rotating ring 2 through the threaded groove 8; the inner wall of the joint prosthesis 1 is provided with a groove 10.

[0028] Specifically, the connecting block 4 is used to limit the sliding trajectory of the ball 3, the thread groove 8 is used to limit the running trajectory of the thread 9, and the groove 10 is used to disperse the force on the prosthesis and prevent the force from concentrating on a certain point of the prosthesis.

[0029] Reference Figure 1 and Figure 5Both joint prosthesis 1 and joint prosthesis 6 include a bonding layer 11, a reinforcing layer 12 and a composite layer 13; the bonding layer 11 is made of titanium alloy; the reinforcing layer 12 is made of alumina ceramic; and the composite layer 13 is made of polyethylene.

[0030] Specifically, the bonding layer 11 is used to improve the affinity between joint prosthesis 1 and joint prosthesis 2 and human tissue; the reinforcing layer 12 is used to improve the overall strength of joint prosthesis 1 and joint prosthesis 2 and improve the reliability of joint prosthesis 1 and joint prosthesis 2; and the composite layer 13 is used to improve the lubrication between joint prosthesis 1 and joint prosthesis 2 and human tissue, avoiding discomfort to the user due to wear. Through the cooperation between the bonding layer 11, the reinforcing layer 12 and the composite layer 13, the effect of improving the comfort of using the prosthesis is achieved.

[0031] Working principle: The ball bearing 3 rotates on the inner wall of the connecting block 4 to assist the operator in rotating the rotating ring 2. When the rotating ring 2 rotates, it drives the threaded teeth 9 to move up and down through the threaded groove 8 on the inner wall. When the threaded teeth 9 move up and down, it drives the transmission column 5 to move up and down, which in turn drives the joint prosthesis 6 to move up and down, thereby adjusting the length of the prosthesis and improving its applicability.

[0032] Since the bonding layer 11 is made of titanium alloy, which has excellent biocompatibility, the prosthesis will not be rejected by the human body. The reinforcing layer 12 is made of alumina ceramic, which has excellent strength, thereby improving the overall hardness of the prosthesis. Polyethylene has excellent lubricity, which ensures that the prosthesis will not rub against human tissue, improving the user's comfort. Through the combined action of the bonding layer 11, the reinforcing layer 12 and the composite layer 13, not only can the overall quality of the prosthesis be improved, but the user's comfort during use can also be improved.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A 3D-printed adjustable femoral hemiarthroplasty prosthesis, comprising a joint prosthesis one (1), characterized in that: The inner wall of the first joint prosthesis (1) is rotatably connected to a rotating ring (2). The inner wall of the rotating ring (2) is provided with an auxiliary component. The lower surface of the auxiliary component is fixedly connected to the upper surface of the first joint prosthesis (1). The inner wall of the rotating ring (2) is slidably connected to a threaded tooth (9). The inner wall of the threaded tooth (9) is fixedly connected to a transmission column (5). The outer wall of the transmission column (5) is fixedly connected to a second joint prosthesis (6). The outer wall of the second joint prosthesis (6) is fixedly connected to a third joint prosthesis (7).

2. The 3D-printed adjustable femoral hemiarthroplasty prosthesis according to claim 1, characterized in that: The auxiliary component includes a ball (3), the inner wall of the rotating ring (2) is slidably connected to the outer wall of the ball (3), the outer wall of the ball (3) is slidably connected to a connecting block (4), and the lower surface of the connecting block (4) is fixedly connected to the upper surface of the joint prosthesis (1).

3. The 3D-printed adjustable femoral hemiarthroplasty prosthesis according to claim 1, characterized in that: The inner wall of the rotating ring (2) is provided with a threaded groove (8), and the threaded teeth (9) are slidably connected to the inner wall of the rotating ring (2) through the threaded groove (8).

4. The 3D-printed adjustable femoral hemiarthroplasty prosthesis according to claim 1, characterized in that: The inner wall of the joint prosthesis (1) is provided with a groove (10).

5. The 3D-printed adjustable femoral hemiarthroplasty prosthesis according to claim 1, characterized in that: Both the first joint prosthesis (1) and the second joint prosthesis (6) include an adhesive layer (11), a reinforcing layer (12), and a composite layer (13).

6. The 3D-printed adjustable femoral hemiarthroplasty prosthesis according to claim 5, characterized in that: The bonding layer (11) is made of titanium alloy.

7. The 3D-printed adjustable femoral hemiarthroplasty prosthesis according to claim 5, characterized in that: The reinforcing layer (12) is made of alumina ceramic.

8. The 3D-printed adjustable femoral hemiarthroplasty prosthesis according to claim 5, characterized in that: The composite layer (13) is made of polyethylene.

Images