3D printing lattice structure

Abstract

The invention discloses a 3D printing lattice structure, and relates to the field of orthopedic implantation medical instruments. According to a specific implementation mode of the 3D printing lattice structure, the 3D printing lattice structure is provided with through holes in the vertical direction, and the through holes comprise random lattice units and regular lattice units; the regular lattice units are arranged on the upper surface and the lower surface of the 3D printing lattice structure, the random lattice is arranged on the side face of the 3D printing lattice structure, and the regular lattice units are provided with through holes. According to the implementation mode, the 3D printing lattice structure with the full-through through holes in the vertical direction and the random structure on the side face can be formed while enough porosity is guaranteed, and the hole diameter of the through holes of the random lattice structure can be precisely customized by controlling the size of the connecting rod structure in the regular lattice unit. The 3D printing lattice structure is applied to a 3D printing implant, so that the 3D printing implant has good nutrition transportation and cell ingrowth functions in the vertical direction, and peripheral tissue bones can easily ingrow through a side random structure.

Description

Technical Field

[0001] This invention belongs to the field of orthopedic implantable medical devices and relates to a 3D printed lattice structure. Background Technology

[0002] In the field of medical devices, researchers have long been studying the optimal porous structure for 3D-printed porous implants. Current technologies include regular lattice structures and random lattice structures, with key parameters including pore size, porosity, and rod diameter. Traditional 3D-printed porous implants primarily use regular lattice structures, which are composed of identical lattice units. However, the pore size and rod diameter of random lattice structures in existing technologies cannot be precisely customized. Studies have shown that in the porous structure of orthopedic implants, larger pore sizes can promote nutrient transport, while smaller pore sizes facilitate cell adhesion. Therefore, a random lattice structure with precisely customizable pore size and porosity could contribute to better bone ingrowth. Summary of the Invention

[0003] In view of this, the present invention provides a 3D printed lattice structure, offering a new solution for the precise customization of the porous structure of 3D printed porous implants.

[0004] The technical solution is as follows:

[0005] A 3D printed lattice structure, characterized in that the 3D printed lattice structure has a through hole in the vertical direction, comprising: random lattice units and regular lattice units; the regular lattice units are disposed on the upper and lower surfaces of the 3D printed lattice structure, the random lattice units are disposed on the side surface of the 3D printed lattice structure, the regular lattice units have through holes, and the random lattice units and the regular lattice units are integrally 3D printed.

[0006] Furthermore, the different regular lattice units have the same structure. The regular lattice units are connected end to end by a linkage structure to form a polygon. Each node of the polygon is connected to a node of an adjacent polygon.

[0007] Furthermore, the structure of the random regular lattice unit includes a trabecular structure and a Thiessen polygonal structure.

[0008] Furthermore, the porosity of the 3D printed lattice structure is 5% to 95%, the diameter of the connecting rod structure is 100 μm to 400 μm, and the diameter of the through hole is 50 μm to 400 μm.

[0009] Furthermore, the regular lattice units are arranged in the same direction along the vertical direction of the 3D printed lattice structure.

[0010] Furthermore, the linkage structures of two adjacent regular lattice units overlap.

[0011] Furthermore, the materials used to fabricate the 3D printed lattice structure include: metals, ceramics, polymers, and composite materials.

[0012] According to the technical solution of the present invention, the above invention has the following advantages or beneficial effects:

[0013] A 3D-printed lattice structure has a fully through-hole in the vertical direction and a random lattice structure on the sides. The aperture of the through-hole in the random lattice structure can be precisely customized by controlling the size of the linkage structure within the regular lattice unit. When applied to 3D-printed implants, this 3D-printed lattice structure enables good nutrient transport and cell ingrowth in the vertical direction, while the random structure on the sides also facilitates the ingrowth of surrounding bone tissue.

[0014] The further effects of the aforementioned unconventional alternative methods will be explained below in conjunction with specific implementation methods. Attached Figure Description

[0015] The accompanying drawings are provided to better understand the invention and are not intended to unduly limit the scope of the invention. Wherein:

[0016] Figure 1 This is a front view of a random lattice unit of a 3D printed lattice structure in an embodiment of the present invention;

[0017] Figure 2 This is a front view of a regular lattice unit of a 3D printed lattice structure in an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of a 3D printed lattice structure in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1-3D printed lattice structure, 2-random lattice unit, 3-regular lattice unit, 4-through hole, 5-link structure. Detailed Implementation

[0021] To better illustrate the present invention and facilitate understanding of its technical solutions, the present invention will be further described in detail below. However, the following embodiments are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

[0022] For simplicity, certain technical features known to those skilled in the art are omitted in the following description.

[0023] According to one embodiment 1 of this application, as Figure 1-2As shown, a 3D printed lattice structure 1 has through holes 4 in the vertical direction. Specifically, the diameter and shape of the through holes 4 in the vertical direction do not change along the vertical direction, thereby ensuring unobstructed cell ingrowth and nutrient delivery channels.

[0024] The 3D printed lattice structure 1 includes: random lattice units 2 and regular lattice units 3. Regular lattice units 2 are disposed on the upper and lower surfaces of the 3D printed lattice structure 1. Specifically, the connecting structures 5 in the regular lattice units 2 are connected end-to-end to form polygons, including triangular, quadrilateral, pentagonal, hexagonal, and heptagonal shapes. Each node of a polygon is connected to a node of an adjacent polygon. Different regular lattice units 3 have identical structures and are arranged in the same direction along the vertical direction of the 3D printed lattice structure 1. The through-holes 4 of regular lattice units 2 at different positions completely overlap in the vertical direction, ensuring that the shape and size of the through-holes 4 remain unchanged in the vertical direction. The connecting structures 5 of two adjacent regular lattice units 2 overlap.

[0025] Random lattice unit 3 is disposed on the side of 3D printed lattice structure 1, and random lattice unit 2 has through hole 4.

[0026] The structure of random lattice unit 2 includes trabecular structure and Thiessen polygonal structure.

[0027] The porosity of the 3D printed lattice structure 1 is 5% to 95%, the diameter of the connecting rod structure 5 is 100μm to 400μm, and the diameter of the through hole 4 is 50μm to 400μm.

[0028] Materials used in 3D printing lattice structures include: metals, ceramics, polymers, and composite materials. Specifically, metallic materials include titanium alloys, magnesium alloys, tantalum alloys, and cobalt-chromium alloys, while polymer materials include PLA, ABS, and PETG.

[0029] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A 3D printed lattice structure, characterized in that, The 3D printed lattice structure has through holes in the vertical direction and includes: random lattice units and regular lattice units; the regular lattice units are disposed on the upper and lower surfaces of the 3D printed lattice structure, the random lattice units are disposed on the side of the 3D printed lattice structure, the regular lattice units have through holes, and the random lattice units and the regular lattice units are integrally 3D printed.

2. The 3D printed lattice structure according to claim 1, characterized in that, The regular lattice units have the same structure, and the regular lattice units are connected by a link structure to form a polygon. Each node of the polygon is connected to a node of an adjacent polygon.

3. The 3D printed lattice structure according to claim 2, characterized in that, The structure of the random regular lattice unit includes trabecular structure and Thiessen polygonal structure.

4. A 3D printed lattice structure according to claim 3, characterized in that, The porosity of the 3D printed lattice structure is 5% to 95%, the diameter of the connecting rod structure is 100 μm to 400 μm, and the diameter of the through hole is 50 μm to 400 μm.

5. A 3D printed lattice structure according to claim 4, characterized in that, The regular lattice units are arranged in the same direction along the vertical direction of the 3D printed lattice structure.

6. A 3D printed lattice structure according to claim 5, characterized in that, The connecting rods of two adjacent regular lattice units coincide.

7. A 3D printed lattice structure according to claim 6, characterized in that, The materials used to fabricate the 3D printed lattice structures include: metals, ceramics, polymers, and composite materials.

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