Interbody fusion cage based on mechanical metamaterial

Abstract

An interbody fusion cage based on mechanical metamaterials comprises an implant, the implant comprises a supporting body, one end of the supporting body is an inserting end, the other end of the supporting body is a connecting end, the side face of the supporting body comprises two oppositely-arranged rotating faces and a plurality of oppositely-arranged bone ingrowth faces, and clamping grooves are formed in the side corners, connected with the connecting end, of the end faces of the rotating faces. A through hole is formed in the middle of the rotating surface, a conformal design technology is adopted for the appearance of the implant, and a customized treatment scheme is provided; porous structures are arranged in the rotating face and the bone ingrowth face, the implant is made of mechanical metamaterials, the mechanical performance of the fusion cage can be accurately adjusted through the design of the metamaterials, the fusion cage better adapts to the characteristics of the lumbar vertebra of the human body, and postoperative complications are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fusion ware, especially based on the intervertebral fusion ware of mechanics super material. BACKGROUND

[0002] The intervertebral fusion ware is the equipment for intervertebral fusion in bone grafting surgery, which promotes intervertebral fusion by fixing pedicle, thereby reducing lumbar pain, stabilizing vertebral body and restoring spinal function, and is widely used in lumbar disc herniation, spinal stenosis, spinal fracture, congenital spinal disease and other spinal diseases. The traditional titanium intervertebral fusion ware optimizes its mechanical properties through metallurgical control, but the control range of this method is limited, the mechanical characteristics of the intervertebral fusion ware are low in the adaptation degree of human bone, which may affect the quality of bone fusion, and the control ability in strength and rigidity is single, and the fusion ware cannot be accurately designed according to different conditions.

[0003] In recent years, as a new material design concept, the super material technology is gradually applied to the field of medical instruments with the characteristics of accurate control of structure, mechanics, heat and other characteristics. Combined with the design of mechanical super material, the mechanical properties of the fusion ware can be better matched with the characteristics of human lumbar vertebra, and a new solution is provided for the treatment of lumbar disease. UTILITY MODEL CONTENT

[0004] In view of the above-mentioned deficiencies of the prior art, the utility model provides an intervertebral fusion ware based on mechanical super material, which solves the problem that the design of the existing intervertebral fusion ware is not fully adapted to the mechanical properties of human bone, optimizes the mechanical properties of the posterior lumbar interbody fusion ware, and can be better adapted to the mechanical properties of human lumbar vertebra, thereby improving the treatment effect.

[0005] An intervertebral fusion ware based on mechanical super material, comprising an implant, the implant comprising a support body, one end of the support body being an insertion end, the other end being a connecting end, a connecting hole being arranged on the end face of the connecting end, the side face of the support body comprising two oppositely arranged rotating surfaces and one oppositely arranged bone ingrowth surface, one of the bone ingrowth surfaces being an arc-shaped curved surface, two clamping grooves being arranged on the end faces of the rotating surfaces, and a porous structure being arranged in the rotating surface and the bone ingrowth surface, the implant being made of mechanical super material.

[0006] Preferably, the insertion end is a <shaped end head with a round corner, the round corner being arranged at the tip position to protect the safety of personnel during installation.

[0007] Preferably, a through hole is arranged in the middle of the two rotating surfaces.

[0008] Preferably, the clamping grooves are arranged on the side edge angle of the end face of the rotating surface connected with the connecting end.

[0009] Preferably, the shape of the implant adopts a conformal design technique.

[0010] Preferably, the unit type of the porous structure includes: triangular pyramid structure, cubic structure, rhombic dodecahedron structure, diamond structure, truncated octahedron structure, three-dimensional tessellation polygon structure.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1. Better mechanical adaptability: through the super material design, the mechanical properties of the interbody fusion cage can be accurately adjusted to better adapt to the characteristics of the human lumbar spine and reduce postoperative complications.

[0013] 2. Promote bone ingrowth and bone integration: the porous structure not only facilitates the growth of bone cells, but also promotes bone integration and improves postoperative results.

[0014] 3. Customized design: based on the personalized needs of patients and the shape of the vertebral body, a conformal design technique is adopted to provide customized treatment plans.

[0015] 4. Significant treatment effect: the dual optimization of mechanical adaptation and bone fusion performance can more effectively treat diseases such as herniated disc and vertebral fracture. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the intervertebral fusion cage of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the bone ingrowth surface;

[0018] Figure 3 It is a schematic diagram of the structure of the rotating surface;

[0019] Figure 4 It is a schematic diagram of the unit type of the porous structure of the utility model.

[0020] Reference signs: 1, implant; 11, support body 2, bone ingrowth surface; 3, insertion end; 4, connecting end; 41, connecting hole; 5, rotating surface; 51, through hole; 6, clamping groove. DETAILED DESCRIPTION

[0021] The technical solution of the utility model patent will be further specifically described below through examples and in combination with the drawings.

[0022] Example:

[0023] An intervertebral fusion cage based on mechanical metamaterials, comprising an implant 1, the implant 1 comprising a support body 11, one end of the support body 11 being an insertion end 3, the insertion end 3 being a rounded <shaped end, the rounded corner being provided at the tip of the <shaped end to protect the safety of the personnel during installation;

[0024] The other end of the support body 11 is a connecting end 4, the support body 11 has sufficient strength to support the height of the vertebral body and prevent secondary collapse of the vertebral body, a connecting hole 41 is provided on the end face of the connecting end 4, the side face of the support body 11 comprises two oppositely arranged rotating surfaces 5 and one bone ingrowth surface 2, one of the bone ingrowth surfaces 2 is an arc-shaped curved surface, two clamping grooves 6 are provided on the end faces of the rotating surfaces 5, and a porous structure is provided in the rotating surfaces 5 and the bone ingrowth surface 2,

[0025] The implant 1 is made by 3D printing, and the implant 1 is made of mechanical metamaterials. The mechanical properties of the fusion cage are optimized, the microstructure of the fusion cage is designed according to different porosity, pore size and rod diameter, and the mechanical properties of the fusion cage are matched with the human lumbar spine;

[0026] By precisely adjusting the parameters of the microstructure of the porous structure, such as porosity, rod diameter and pore size, the mechanical properties of the fusion cage can be precisely controlled. These parameters can be adjusted according to the needs of different patients to customize the hardness and flexibility of the fusion cage, so that it can better adapt to the load of the lumbar spine and reduce postoperative complications.

[0027] A through hole 51 is provided in the middle of the two rotating surfaces 5, and the porous structure is exposed from the through hole 51, and the bone grows inward through the through hole 51.

[0028] The clamping groove 6 is provided on the side edge corner of the end face of the rotating surface 5 connected with the connecting end 4.

[0029] The shape of the implant 1 adopts a conformal design technology, so that it can better adapt to the shape and load conditions of the lumbar spine. Through the optimization design of the contour of the fusion cage, it is ensured that it can be perfectly connected with the intervertebral space, and the opportunity of bone integration is increased.

[0030] The unit types of the porous structure include triangular pyramid structure, cubic structure, rhombohedron structure, diamond structure, truncated octahedron structure, and three-dimensional tessellation polygon structure.

[0031] A design and implementation process of an intervertebral fusion cage based on mechanical metamaterials:

[0032] 1. Metamaterial design: simulate and optimize the microstructure design through computer-aided design software.

[0033] 2. Parameter regulation: The microstructure parameters of the fusion cage, such as porosity, rod diameter, and pore size, are regulated to meet the needs of different diseases.

[0034] 3. Conformal design: The shape of the fusion cage is designed to be personalized by scanning the lumbar vertebrae of the patient, so that it seamlessly connects with the intervertebral space of the patient.

[0035] Finally, it should be pointed out that the above examples are only representative examples of the present patent. Obviously, the present patent is not limited to the above examples, and many variations are possible. Any simple modification, equivalent change and modification made in accordance with the technical essence of the present patent to the above examples shall be considered as falling within the scope of protection of the present patent.

Claims

1. An interbody fusion device based on mechanical metamaterials, characterized in that, The implant includes an implant (1), which includes a support (11). One end of the support (11) is an insertion end (3), and the other end is a connection end (4). A connection hole (41) is provided on the end face of the connection end (4). The side of the support (11) includes two opposing rotating surfaces (5) and two opposing bone growth surfaces (2). One of the bone growth surfaces (2) is an arc-shaped curved surface. Two clamping grooves (6) are provided on the end faces of the two rotating surfaces (5). A porous structure is provided in the rotating surfaces (5) and the bone growth surfaces (2). The implant (1) is made of mechanical metamaterial.

2. The interbody fusion device based on mechanical metamaterials according to claim 1, characterized in that: The insertion end (3) is a <-shaped end with rounded corners. The rounded corners are located at the pointed end of the < to protect the safety of personnel during installation.

3. The interbody fusion device based on mechanical metamaterials according to claim 1, characterized in that: A through hole (51) is provided between the two rotating surfaces (5).

4. The interbody fusion device based on mechanical metamaterials according to claim 1, characterized in that: The clamping groove (6) is formed on the side corner of the end face of the rotating surface (5) that is connected to the connecting end (4).

5. The interbody fusion device based on mechanical metamaterials according to claim 1, characterized in that: The shape of the implant (1) adopts conformal design technology.

6. The interbody fusion device based on mechanical metamaterials according to claim 1, characterized in that: The unit types of the porous structure include: triangular pyramid structure, cubic structure, rhombic dodecahedral structure, diamond structure, truncated octahedral structure, and three-dimensional Thiessen polygon structure.

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