3D printed metal implant

Abstract

The utility model discloses a 3D printing metal implant. The 3D printing metal implant comprises an implant main body, the top part, the middle part and the bottom part are adopted, so that during operation, the top part, the middle part and the bottom part can be subjected to 3D production in batches through a 3D printer; multiple groups of produced components can be in butt joint through limiting rings at the bottoms and positioning grooves in the tops to achieve preliminary connection operation of multiple groups of structures, then the structures are rotated to enable the holes to be aligned with one another, then fastening bolts are installed in the holes, and fixing operation of the multiple groups of structures can be achieved through the fastening bolts. Due to the fact that the structure forming the implant body is arranged in a modularized mode, the error-tolerant rate in the production process is greatly improved, replacement production can be carried out in a targeted mode when a certain component is unqualified, the whole structure does not need to be reproduced, and the overall use flexibility and practicability are effectively improved; the method has the advantages of high production error-tolerant rate and flexibility in use.

Description

Technical Field

[0001] The utility model relates to the technical field of medical device equipment, and more specifically, to 3D printed metal implants. Background Art

[0002] Due to its ability to customize the shape of implants according to the needs of patients and precisely control the complex microstructure of implants, achieving a dual fit between the shape and mechanical properties of implants and the human body's own bones, 3D printing technology has been highly favored and developed rapidly in the field of orthopedic implant medical devices. According to the health industry standards of our country, an implant is an implantable item placed in a body cavity caused by a surgical operation or physiologically existing and retained for more than 30 days. In orthopedic treatment, metal internal implants are used to replace diseased bones.

[0003] In the existing public technology, the application number is: CN202321309181.7, a 3D printed femoral repair implant with a wedge-shaped boundary, which sets a plurality of wedge-shaped grooves at the boundary where the first end face and the second end face of the implant body intersect, and uses the wedge-shaped grooves to fit the implant body with its own bone tissue, improving the stability of the femoral implant combined with its own bone tissue, reducing the risks of relative sliding, rotation and instability in the vertical direction of the femoral implant during long-term use in the body, and avoiding damage to the original bone tissue by implanting bone nails.

[0004] However, the above patent still has certain disadvantages in use: Most of the existing 3D printed production implants are integrally formed at one time, which results in a low error tolerance during production. Once a deviation occurs during the production process, the entire implant cannot be used and needs to be reprinted and produced as a whole, which is time-consuming and laborious. Moreover, the implant lacks fixation measures with the bone during use and is prone to falling off during subsequent use, thus leading to danger. And the overall structure is fixed and cannot be maintained, replaced or changed in a timely manner, and the flexibility of use is not very good.

[0005] In response to the problems in the related technology, no effective solution has been proposed yet. Summary of the Utility Model

[0006] (1) Technical Problems to be Solved

[0007] In view of the deficiencies of the prior art, the utility model provides a 3D printed metal implant, which has the advantages of high production error tolerance, strong implant stability and flexible use, thus solving the problems in the above background art.

[0008] (2) Technical Solutions

[0009] In order to achieve the above advantages of high production tolerance, strong implantation stability and flexible use, the specific technical solutions adopted by the utility model are as follows:

[0010] A 3D printed metal implant comprises an implant body, which is composed of a top component, a middle component and a bottom component. The bottom positions of the top component and the bottom positions of the middle component are both surrounded by limit rings, the top positions of the middle component and the top positions of the bottom component are both surrounded by positioning grooves, and the positioning grooves are located directly below the limit rings and have the same structural dimensions. The top component, the middle component and the bottom component are fixed to each other by fastening screws, the surface positions of the top component and the surface positions of the middle component are both penetrated by threaded holes, and the top position of the bottom component is also provided with a threaded hole.

[0011] Furthermore, wrapping grooves are provided on the surface of the top component and the surface of the bottom component, a plurality of positioning holes are provided around the surface of the wrapping grooves, and a plurality of clamping strips are evenly installed around one end of the wrapping grooves.

[0012] Furthermore, a plurality of groups of through micro holes are provided in the inner positions of the top component, the middle component and the bottom component.

[0013] Furthermore, the fastening screw, the clamping strip and the screws for the positioning holes are all made of medical-grade materials.

[0014] Furthermore, the size of the wrapping groove is the same as the bone size of the application area.

[0015] Furthermore, the through micropores have a diameter of 0.3 to 3.0 mm.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a 3D printed metal implant, which has the following beneficial effects:

[0018] (1) The utility model adopts a top component, a middle component, and a bottom component. During operation, the top component, the middle component, and the bottom component can be 3D produced in batches by a 3D printer. Then, the produced multiple groups of components can be connected with the positioning grooves at the top through the limiting rings at the bottom to achieve the initial connection operation of the multiple groups of structures. Then, the rotating structure can make the holes on its surface align with each other, and then the fastening bolts can be installed in the holes. The fixing operation of the multiple groups of structures can be achieved by fastening the bolts. Since the structure constituting the implant body adopts a modular setting, the fault tolerance rate is greatly improved during the production process. When a certain component is unqualified, it can be replaced in a targeted manner without the need to re-produce the entire structure. This effectively improves the overall flexibility and practicality of use, and has the advantages of high production fault tolerance rate and flexible use.

[0019] (2) After the present utility model adopts the wrapping groove, the clamping strip and the positioning hole, after the implant is constructed, the formed implant body can be smoothly installed at the designated part of the human body. At this time, the bones can be wrapped through the wrapping grooves on the surfaces of the top component and the bottom component, and the clamping operation on the bones can be realized through the clamping strips on the surface, so as to realize the preliminary fixing operation of the implant and the human bones. Then, screws can be installed in the positioning holes to connect the implant and the bones, improving the overall use stability and avoiding subsequent detachment, having the advantage of strong implant stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is a schematic structural view of a 3D printed metal implant proposed by the present utility model;

[0022] Figure 2 is a schematic internal structural view of the wrapping groove of the present utility model;

[0023] Figure 3 is a schematic structural view of the bottom component of the present utility model;

[0024] Figure 4 is a schematic structural view of the middle component of the present utility model.

[0025] In the figure:

[0026] 1. Implant body; 2. Top component; 3. Middle component; 4. Bottom component; 5. Positioning groove; 6. Limiting ring; 7. Through micropores; 8. Tightening screw; 9. Positioning hole; 10. Wrapping groove; 11. Clamping strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To further illustrate the embodiments, the present utility model provides drawings, which are part of the disclosure of the present utility model. They are mainly used to illustrate the embodiments and can be combined with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0028] According to the embodiments of the present utility model, a 3D printed metal implant is provided.

[0029] The present utility model will be further described in conjunction with the accompanying drawings and specific embodiments. As Figures 1-4 shown, the 3D printed metal implant according to an embodiment of the present utility model includes an implant body 1, and the implant body 1 is composed of a top member 2, a middle member 3, and a bottom member 4. Limiting rings 6 are circumferentially installed at the bottom positions of the top member 2 and the middle member 3, and positioning grooves 5 are circumferentially formed at the top positions of the middle member 3 and the bottom member 4. The positioning grooves 5 are located directly below the limiting rings 6 and have the same structural dimensions. The top member 2, the middle member 3, and the bottom member 4 are fixed to each other by fastening screws 8. Threaded holes are formed through the surface positions of the top member 2 and the middle member 3, and a threaded hole is also formed at the top position of the bottom member 4.

[0030] In one embodiment, wrapping grooves 10 are formed at the surface positions of the top member 2 and the bottom member 4. A plurality of groups of positioning holes 9 are circumferentially formed at the surface positions of the wrapping grooves 10. A plurality of groups of clamping strips 11 are evenly circumferentially installed at one end of the wrapping grooves 10. The end positions of the clamping strips 11 adopt an arc-shaped smooth structure to prevent the ends from stabbing people and improve the safety of the structure during use.

[0031] In one embodiment, a plurality of groups of through micropores 7 are formed through the interior positions of the top member 2, the middle member 3, and the bottom member 4.

[0032] In one embodiment, the fastening screws 8, the clamping strips 11, and the screws for the positioning holes 9 are all made of medical-grade materials. The selection of medical-grade materials is to avoid rejection reactions of the human body caused by the above-mentioned components used, thereby ensuring the safety of use.

[0033] In one embodiment, the size of the wrapping groove 10 is the same as the size of the bone in the application area. The wrapping groove 10 is provided to wrap the human bone, realize the preliminary connection operation, and thereby improve the stability after subsequent implantation.

[0034] In one embodiment, the diameter of the through micropores 7 is 0.3 - 3.0 mm. The diameter of the through micropores 7 is set to avoid insufficient structural strength due to too large a size, and at the same time ensure that the nutrients required by human cells and metabolic wastes can circulate in the body through the through micropores 7, promote the in-growth of bone cells into the micropores, and improve the stability of the implant.

[0035] Working principle: During actual use, after personnel add titanium alloy powder into the 3D printer, the top component 2, middle component 3, and bottom component 4 can be 3D produced in batches by the 3D printer. Then, the multiple groups of produced components can be docked through the limiting ring 6 at the bottom and the positioning groove 5 at the top to achieve the preliminary connection operation of multiple groups of structures. Next, by rotating the structure, the holes on its surface can be aligned with each other. Then, fastening bolts can be installed in the holes, and through the fastening bolts, the fixation operation of multiple groups of structures can be achieved. Since the structures forming the implant body 1 are modularly arranged, the error tolerance rate is greatly improved during the production process. When a certain component is unqualified, it can be replaced and produced specifically, without the need to re-produce the entire structure, effectively improving the overall usability and practicality. Then, the formed implant body 1 can be smoothly installed at the designated part of the human body. At this time, the bones can be wrapped through the wrapping grooves 10 on the surfaces of the top component 2 and the bottom component 4, and the clamping and fixing operation of the bones can be achieved through the clamping strips 11 on the surface, so as to achieve the preliminary fixation operation of the implant and the human bones. Then, screws can be installed in the positioning holes 9 to connect the implant and the bones, improving the overall use stability and avoiding subsequent detachment. All components forming the implant are made of materials meeting medical standards to ensure the safety of use. Moreover, the nutrients required by human cells and metabolic wastes can circulate in the body through the through micropores 7, promoting the ingrowth of bone cells into the micropores and improving the stability of the implant. The overall device has the advantages of high production error tolerance, strong implant stability, and flexible use.

[0036] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "rotary connection", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A 3D printed metal implant, comprising an implant body (1), characterized in that, The implant body (1) is composed of a top component (2), a middle component (3), and a bottom component (4). Limiting rings (6) are installed around the bottom positions of the top component (2) and the middle component (3). Positioning grooves (5) are circumferentially formed at the top positions of the middle component (3) and the bottom component (4), and the positioning grooves (5) are located directly below the limiting rings (6) and have the same structural dimensions. The top component (2), the middle component (3), and the bottom component (4) are fixed to each other by fastening screws (8). Threaded holes are formed through the surfaces of the top component (2) and the middle component (3), and a threaded hole is also formed at the top position of the bottom component (4).

2. The 3D printed metal implant according to claim 1, characterized in that, Wrapping grooves (10) are formed on the surfaces of the top component (2) and the bottom component (4). A number of groups of positioning holes (9) are circumferentially formed on the surfaces of the wrapping grooves (10). A number of groups of clamping strips (11) are evenly installed around one end of the wrapping grooves (10).

3. The 3D printed metal implant according to claim 1, characterized in that, A number of groups of through micropores (7) are formed through the interiors of the top component (2), the middle component (3), and the bottom component (4).

4. The 3D printed metal implant according to claim 1, wherein The fastening screws (8), the clamping strips (11), and the screws for the positioning holes (9) are all made of medical-grade materials.

5. The 3D printed metal implant according to claim 2, wherein The size of the wrapping grooves (10) is the same as the size of the bone in the application area.

6. The 3D printed metal implant according to claim 3, wherein The diameter of the through micropores (7) is 0.3 - 3.0 mm.

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