CN112674917A

CN112674917A - Intervertebral fusion device for fitting with vertebra

Info

Publication number: CN112674917A
Application number: CN202011521346.8A
Authority: CN
Inventors: 孙杨; 王玉珏
Original assignee: Shenzhen Corliber Scientific Co ltd
Current assignee: Shenzhen Corliber Scientific Co ltd
Priority date: 2018-06-12
Filing date: 2018-06-12
Publication date: 2021-04-20
Anticipated expiration: 2038-06-12
Also published as: CN108670507A; CN108670507B; CN112704584B; CN112704584A; CN112674917B

Abstract

The present disclosure relates to an intervertebral fusion device attached to vertebrae, which includes a main body part and a support part, wherein the main body part is flat; the support portion is formed on the main body portion and has a plurality of struts formed obliquely on the main body portion, each of the plurality of struts includes one of first type struts having a first inclination angle and one of second type struts having a second inclination angle, the first type struts and the second type struts form an included angle, in each of the plurality of struts, the one of the first type struts and the one of the second type struts have a common base end disposed on the main body portion, the first inclination angle is an included angle formed by the first type struts and the main body portion, and the second inclination angle is an included angle formed by the second type struts and the main body portion. Therefore, the support part is easily adaptively stressed according to the surface of the vertebrae contacting the intersomatic cage, thereby improving the clinical restoration effect of the intersomatic cage.

Description

Intervertebral fusion device for fitting with vertebra

The application is a divisional application of patent application with application date of 2018, 12/06 and application number of 2018106037493 and the name of the invention of the adaptive intervertebral fusion device.

Technical Field

The present disclosure relates to an intervertebral cage for fitting to vertebrae.

Background

With the aggravation of aging of population and the change of life habits of people in modern cities, spine degenerative diseases represented by cervical spondylosis, cervical intervertebral disc protrusion, lumbar spinal stenosis and the like seriously affect the work and life of people. At present, conservative treatment methods such as drug therapy and physical therapy are mostly adopted when the above-mentioned disease conditions are in the early stage. However, as the patient's condition becomes more severe, more effective treatments, such as vertebroplasty, are contemplated to inhibit the patient's condition from becoming worse. For example, in case of lumbar intervertebral disc protrusion, when the intervertebral disc protrusion presses the vertebral canal beyond 1/3 or numbness, difficulty in movement, weakness of urination and defecation, etc. of the lower limbs occur, the treatment effect of the conservative treatment method is not obvious, and the patient needs to be considered to perform vertebral fusion.

In the vertebral fusion, the intervertebral disc protruded between vertebrae is removed, and then an intervertebral fusion device is implanted between the vertebrae to induce the vertebrae to be fused together, so as to achieve the purpose of eliminating the focus. In the clinical application of the vertebral fusion, because the intervertebral fusion cage is placed in a human body for a long time after the operation, the factors such as the structure, the manufacturing technology, the quality and the like of the intervertebral fusion cage play an important role in the postoperative effect of the vertebral fusion.

Patent document 1 discloses a shapeable individualized spine fusion cage, which comprises an upper top plate, a lower top plate, a shaping spring, an internal biological silica gel ring, an external biological silica gel ring, a buckle A and a buckle B of the fusion cage. Go up roof and roof down link together through reset spring, interior biological silica gel circle and outer biological silica gel circle distribute in reset spring's inboard and outside to connect on roof about through buckle A and buckle B, and outer biological silica gel circles and has a bone cement filling hole.

However, in the above-mentioned patent document 1, although the height, angle, inclination, etc. of the fusion cage can be adjusted, the shapes of the upper top plate and the lower top plate of the fusion cage are fixed, and there is an individual difference between each individual operation, and the surface contacting with the human bone cannot be completely fitted. Therefore, the fusion cage of patent document 1 does not contribute to the fusion effect between vertebrae.

Documents of the prior art

Patent document 1: chinese patent application publication No. CN 104083235A.

Disclosure of Invention

The present disclosure has been made in view of the above-mentioned state of the art, and an object of the present disclosure is to provide an intervertebral cage which can be adapted to different shapes of intervertebral bones, increase the bone inducing ability thereof, and promote bone growth.

To this end, the present disclosure provides an intervertebral cage for fitting to vertebrae, comprising a main body portion and a support portion, the main body portion being flat; the support portion is formed at the main body portion and has a plurality of struts formed at the main body portion with an inclination, each of the plurality of struts includes one of first-type struts having a first inclination angle and one of second-type struts having a second inclination angle, the first-type struts and the second-type struts form an included angle, in each of the plurality of struts, the one of the first-type struts and the one of the second-type struts have a common base end, the base end being disposed on the main body portion, the first inclination angle being an included angle formed by the first-type struts and the main body portion, and the second inclination angle being an included angle formed by the second-type struts and the main body portion.

In this case, after the intersomatic cage is implanted between the human body such as vertebrae, the supporting part is in direct contact with the vertebrae to receive pressure from the vertebrae, and since the supporting part has a plurality of struts formed obliquely on the body part, the supporting part is easily adaptively stressed according to the surfaces of the vertebrae in contact with the intersomatic cage, thereby improving the clinical prosthetic effect of the intersomatic cage. In addition, since the intervertebral cage can stimulate the fusion surface of the vertebrae more uniformly, it has good bone induction property and can promote the bone to recover and grow.

In addition, in the intervertebral cage according to the present disclosure, each of the plurality of struts may optionally include one of a third type of strut having a third inclination angle, the third inclination angle being an angle formed by the third type of strut and the main body portion. In this case, the force applied to the cage can be made more uniform.

In addition, in the intervertebral cage according to the present disclosure, optionally, the inclination direction of the third type of strut is different from the inclination direction of the first type of strut and the inclination direction of the second type of strut. In this case, the force applied to the cage can be made more uniform.

Additionally, in the intervertebral cage according to the present disclosure, optionally, the respective struts of the first type of strut are parallel to each other and the respective struts of the second type of strut are parallel to each other.

In addition, in the intervertebral cage according to the present disclosure, the support portion may optionally include buffer portions provided at ends of the first-type and second-type struts, respectively, the buffer portions being in direct contact with vertebrae, and the buffer portions may be inclined to fit the vertebrae when being pressed. In this case, the buffer portion may be inclined when the intervertebral cage is pressurized, thereby better conforming to the bone.

In addition, in the intervertebral cage according to the present disclosure, optionally, the body portion has a mesh structure composed of polygons. In this case, not only structural stability of the main body portion can be improved, but also the qi and blood passage of the interbody fusion cage can be facilitated, and bone growth can be promoted.

In addition, in the intervertebral cage according to the present disclosure, optionally, the body portion is further filled with artificial bone. This can induce bone growth and promote recovery.

In the intervertebral cage according to the present disclosure, the body portion may be integrally formed with the support portion. Thereby, the structural stability of the intervertebral cage can be increased.

In the intervertebral cage according to the present disclosure, the artificial bone may be coupled to the body portion by thermocompression. Thereby, the artificial bone can be firmly combined with the intervertebral cage.

In addition, in the intervertebral cage according to the present disclosure, optionally, the main body portion has a blind hole, and the blind hole is provided in a solid structure portion of the main body portion along a length direction of the main body portion. In this case, after the intervertebral cage is installed between vertebrae, as the bone grows, a part of the bone enters the blind hole and adheres to the intervertebral cage, thereby better achieving the combination of the bone and the intervertebral cage.

According to the present invention, it is possible to provide an intervertebral cage which can adapt to different shapes of intervertebral bones, increase the bone inducibility thereof, and promote bone growth.

Drawings

Embodiments of the present disclosure will now be explained in further detail, by way of example only, with reference to the accompanying drawings, in which:

fig. 1 is a schematic view showing a state of use of an intervertebral cage according to a first embodiment of the present disclosure.

Fig. 2 is a perspective view illustrating an intervertebral cage according to a first embodiment of the present disclosure.

Figure 3 is a cross-sectional view of the intervertebral cage according to figure 2 taken along section line A-A'.

Figure 4 is a schematic view showing the mesh structure of the body of the intersomatic cage.

Figure 5 is a side view showing the intervertebral cage.

Fig. 6 is an enlarged partial view showing a side view of the intersomatic cage shown in fig. 5.

Fig. 7 is a schematic top view showing the three struts of fig. 6.

Fig. 8 is a perspective view illustrating an intervertebral cage according to a second embodiment of the present disclosure.

Fig. 9 is a perspective view schematically illustrating a modification example of the main body portion of the intervertebral cage according to the second embodiment of the present disclosure.

Detailed Description

All references cited in this disclosure are incorporated by reference in their entirety as if fully set forth. Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. General guidance for many of the terms used in this application is provided to those skilled in the art. Those of skill in the art will recognize many methods and materials similar or equivalent to those described herein that can be used in the practice of the present disclosure. Indeed, the disclosure is in no way limited to the methods and materials described.

(first embodiment)

Fig. 1 is a schematic view showing a state of use of an intervertebral cage 1 according to a first embodiment of the present disclosure. Fig. 2 is a perspective view showing the intervertebral cage 1 according to the first embodiment of the present disclosure. Fig. 3 is a sectional view showing an intervertebral cage according to the first embodiment of the present disclosure, taken along a section line a-a'.

As shown in fig. 1 and 2, a first embodiment of the present disclosure relates to an adaptive intervertebral cage 1 (sometimes also referred to as "intervertebral cage 1"). In the present embodiment, the intervertebral cage 1 includes a support portion 20 and a body portion 10. In the intervertebral cage 1 according to the present embodiment, the main body 10 is flat, and the support portion 20 is formed in the main body 10 and includes a plurality of struts formed obliquely in the main body 10.

As shown in fig. 1, after the intersomatic cage 1 is implanted between the human body such as the vertebrae 2, the support part 20 is in direct contact with the vertebrae to receive pressure from the vertebrae, and since the support part 20 has a plurality of struts formed obliquely on the body part 10, the support part 20 is easily adaptively stressed according to the surfaces of the vertebrae contacting the intersomatic cage 1, thereby improving the clinical prosthetic effect of the intersomatic cage 1. In addition, since the intervertebral cage 1 can stimulate the vertebral fusion surface more uniformly, it has good bone induction and can promote bone restoration growth.

In some examples, in the intervertebral cage 1, the support part 20 may be provided on both upper and lower surfaces of the body part 10 (see fig. 3). For example, the support portion 20 may be provided with a support portion 20a and a support portion 20b symmetrically with respect to the main body portion 10 (see fig. 5 described later). In this case, the

support parts

20a and 20b located at the upper and lower surfaces of the body part 10 may be adaptively stressed according to the surfaces of the vertebrae contacting the intersomatic cage 1, thereby further improving the clinical restoration effect of the intersomatic cage 1.

In some examples, the intervertebral cage 1 may be fabricated by 3D printing. In this way, the intervertebral cage 1 having a plurality of strut structures can be manufactured by the 3D printing technique.

In some examples, the main body 10 and the support 20 may be integrally formed. This can increase the structural stability of the intervertebral cage 1. In other examples, the body portion 10 and the supporting portion 20 may be detachably assembled together. In this case, for example, the support part 20 can be used in a targeted manner depending on the different vertebrae and the conditions between the vertebrae, as a result of which the suitability of the intervertebral cage 1 can be increased.

As shown in fig. 4, the body portion 10 may have a net structure. In this case, not only structural stability of the main body 10 can be improved, but also the qi and blood passage of the intervertebral fusion cage 1 can be facilitated to promote bone growth. In some examples, the body portion 10 may be a planar mesh structure. This can reduce the overall thickness of the intervertebral cage 1. In some examples, the mesh structure of the body portion 10 may be a planar mesh structure consisting of triangles, quadrilaterals, pentagons, hexagons, or other polygons.

In some examples, the outer contour of the body portion 10 may be in an elliptical, rectangular, polygonal, or irregular pattern. For example, the body portion 10 may have a hexagonal shape in a lattice shape.

In some examples, in the body portion 10, a filler that promotes bone growth may be filled. For example, the main body 10 may be filled with an artificial bone (not shown). This can induce bone growth and promote recovery.

In some examples, the artificial bone may be bonded to the body portion 10 by means of thermocompression bonding. This enables the artificial bone to be stably coupled to the intervertebral cage 1.

In some examples, the artificial bone may include a bioceramic particle and a degradable polyester material. Under the condition, the artificial bone can be degraded after promoting the growth of the bone, and a qi and blood passage is formed in the net structure, so that the obstruction of the qi and blood passage between the vertebras is avoided, and the growth and the recovery of the bone are facilitated.

In some examples, the bioceramic particles may include, for example, hydroxyapatite, tricalcium phosphate, and the like. In some examples, the degradable polyester material may include, for example, polylactic acid, polycaprolactone, copolymers thereof, and the like.

In other examples, the body portion 10 may also be a solid structure. In this case, the structure of the main body portion 10 is more robust.

In the present embodiment, the material of the main body 10 is not particularly limited, and at least one of metal, ceramic, and polymer may be used depending on the application. In some examples, the main body 10 is preferably made of titanium metal, Polyetheretherketone (PEEK), or the like, for the sake of biocompatibility and hardness.

In some examples, the main body 10 may further include a plurality of through holes (not shown) penetrating vertically. This enables the formation of a qi-blood channel and promotes the recovery of bone growth. The positions of the through holes are not particularly limited, and in some examples, the through holes may be uniformly distributed in the main body 10.

When the body portion 10 has a mesh structure, the through-holes may have a polygonal prism shape, for example, a triangular prism, a quadrangular prism, or a regular hexagonal prism. This can increase the size of the through hole while ensuring the structural stability of the main body 10. In other examples, the through-holes may also be circular, triangular, quadrilateral, or other irregular shapes.

Figure 5 is a side view showing the intervertebral cage. Fig. 6 is an enlarged partial view showing a side view of the intersomatic cage shown in fig. 5. Fig. 7 is a schematic top view showing the three struts of fig. 6.

In the present embodiment, the support part 20 may include a plurality of pillars obliquely protruding from the main body part 10 (see fig. 5). In some examples, in the case where the main body portion 10 is a mesh structure, a plurality of struts may protrude obliquely from the mesh structure.

In some examples, as shown in fig. 7, the plurality of struts of the support portion 20 may further include at least a first inclination angle θ₁And a first type of strut 21 having a second angle of inclination theta₂The second type of strut 22. The first type of support posts 21 and the second type of support posts 22 may form an angle phi.

In some examples, the first-type struts 21 may include a plurality of parallel struts 21 formed on the main body portion 10₁ Support column 21₂ Support column 21₃… …, pillar 21_n(ii) a The second type of strut 22 may include a plurality of parallel struts 22 formed on the main body portion 10₁ Pillar 22₂ Pillar 22₃… …, pillar 22_n。

In addition, the first inclination angle θ of the first-type struts 21₁Is the included angle formed by the first type strut 21 and the main body part 10; second angle of inclination theta of second type of strut 22₁Is the angle theta formed by the first type of strut 12 and the main body portion 10₂. In some examples, the first inclination angle θ₁And a second inclination angle theta₂And may be 0 to 90 degrees.

As described above, since the first-type support column 21 and the second-type support column 22 form an angle with the main body portion 10 (the surface or imaginary plane of the main body portion 10), when the intervertebral cage 1 is implanted between vertebrae, the first-type support column 21 and the second-type support column 22 can bear the pressure of the vertebrae in different directions, so that the intervertebral cage 1 can more effectively support the pressure from the vertebrae, and secondary damage to the vertebrae can be avoided.

Additionally, in some examples, the first angle of inclination θ of the struts 21 of the first type₁A second inclination angle theta of the second type of strut 22₂Different angle values may be taken.

In some examples, the first inclination angle θ of the first-type struts 21₁Second angle of inclination theta to the second type of strut 22₂May be identical and the first type of strut 21 forms an angle with the second type of strut 22

In this case, the intervertebral cage 1 can be made to more effectively uniformly support the pressure from the vertebrae. In some examples, the included angle

And may be 0 to 45 degrees.

In some examples, the struts of the first type of strut 21 and the respective struts of the second type of strut 22 each have a common base end 100 (see fig. 6). In particular, the struts 21, for example the struts 21 of the first type₁With the struts 22 of the second type of strut 22₁Having a common base end 100₁ Pillars 21 of the first type of pillars 21₂With the struts 22 of the second type of strut 22₂Having a common base end 100₂. Similarly, the struts 21 of the first type of strut 21₃May be associated with the struts 22 of the second type of strut 22₃Having a common base end 100₃… … support posts 21 of the first type of support post 21_nMay be associated with the struts 22 of the second type of strut 22_nHaving a common base end 100_n。

As described above, the first-type struts 21 and the second-type struts 22 may have the common base end 100, and thus the support portion 20 may receive forces from the vertebrae through a plurality of different directions, thereby improving the stress conditions of the vertebrae.

Additionally, in some examples, stress concentrations may be reduced by increasing the number of struts in the support 20, resulting in a more uniform distribution of structural stresses within the interbody cage 1. In addition, in some examples, the base end 100 may also be provided at a location of the solid structure of the support 20.

In other examples, the struts of the first-type struts 21 and the struts of the second-type struts 22 may not have a common strut base end and may be formed to be directly inclined from the main body portion 10.

In some examples, the struts of the support 20 may further include a third type of strut 23 (see fig. 7) having a different inclination direction from the first type of strut 21 and the second type of strut 22. The third type strut 23 has a third inclination angle theta with respect to the main body 10₃(not shown). In addition, the thirdThe class-posts 23 are angled with respect to the first class-posts 21 and the second class-posts 22, respectively. In this case, the three types of

struts

21,22,23 of the support 20 in different directions enable a more uniform stress on the intersomatic cage 1.

Additionally, in some examples, differently oriented struts of the first, second, and

third types

21,22,23 may have a common base end 100. In some examples, the three types of struts having a common base end 100 may be angled relative to one another at equal angles. In this case, the base end 100 can be uniformly forced.

In some examples, the first type of strut 21, the second type of strut 22, and the third type of strut 23 may be made of a material having some elasticity. For example, the first type of strut 21, the second type of strut 22, and the third type of strut 23 may be made of one or more of titanium metal, Polyetheretherketone (PEEK), and the like.

In addition, in some examples, the support portion 20 may further include a buffer portion (not shown) provided at an end portion of the pillars (the first-type pillars 21, the second-type pillars 22, and the third-type pillars 23). In this case, since the buffer portion is in direct contact with the vertebrae, it is possible to buffer the force of the intervertebral cage 1 directly applied to the vertebrae.

In some examples, the cushioning portion may be at least one of flat, spherical, and elliptical. Thus, different buffer shapes can be selected according to different fusion devices.

In some examples, the cushioning portion may also be somewhat inclined with the end of the strut as a fulcrum. In this case, the buffer portion may be inclined when the intervertebral cage 1 is pressed, thereby better fitting with the bone.

As described above, the support portion 20 may be provided on both upper and lower surfaces of the main body portion 10. In this case, the intervertebral cage 1 can simultaneously induce stimulation to the bone through the supports 20 of the upper and lower surfaces, promoting the restoration of growth.

(second embodiment)

The main difference between the adaptive intervertebral cage 1A according to the second embodiment of the present disclosure (which may be referred to as "intervertebral cage 1A") and the intervertebral cage 1 according to the first embodiment is that the main body 10 of the intervertebral cage 1A has a frame structure (see fig. 8).

In the intervertebral cage 1A according to the present embodiment, the main body 10 has a three-dimensional frame structure. Specifically, the main body 10 may be formed by stacking a plurality of planar mesh structures, and the planar mesh structures may have connecting columns therebetween. In this case, since the main body portion 10 of the net structure has many voids, the intervertebral qi and blood passage can be improved.

In some examples, the main body portion 10 may be a mesh structure of a rectangular parallelepiped. In other examples, the body portion 10 may also be a cylinder, a polygonal prism, an irregular solid structure, or the like. This can change the internal structural distribution of the main body 10 of the intervertebral cage 1A, and improve the air-blood passage between the intervertebral cage 1A and the spine after implantation.

In some examples, in the case where the main body part 10 is a three-dimensional net structure, the first-type struts 21, the second-type struts 22, and the third-type struts 23 may be formed at different net structure positions, respectively, and protrude obliquely from the net structure (see fig. 8). In this case, the qi-blood exchange of the intervertebral cage 1A can be further improved, facilitating the filling of the filler which promotes the bone growth. For example, in this case, the main body 10 may be filled with more artificial bone, thereby contributing more to the induction of bone growth and promoting bone restoration.

Fig. 9 is a schematic view showing a modification of the intervertebral cage according to the second embodiment of the present disclosure.

As shown in fig. 9, the body portion 10 may have a blind hole 110. Specifically, the blind hole 110 is provided in the solid structure portion of the main body portion 10 along the longitudinal direction of the main body portion 10. In some examples, the blind holes 110 can be rectangular, square, circular, oval, triangular, polygonal, or irregular patterns, among others. In this case, after the intervertebral cage 1 is installed between vertebrae, as the bone grows, a portion of the bone enters the blind hole and adheres to the intervertebral cage 1, thereby better achieving the combination of the bone with the intervertebral cage 1.

In other examples, the blind hole 110 may be filled with an artificial bone (not shown). Therefore, the bone can be guided to grow into the blind hole, and fusion is accelerated.

In some examples, the artificial bone is bonded to the body portion 10 by means of thermocompression bonding. This enables the artificial bone to be firmly bonded to the intervertebral cage 1A.

In some examples, the artificial bone may include a bioceramic particle and a degradable polyester material. Under the condition, the artificial bone can be degraded after promoting the growth of the bone, a qi-blood passage is formed in the reticular structure, the qi-blood exchange between the vertebras is improved, and the growth and the recovery of the bone are facilitated.

In some examples, the bioceramic particles may include, for example, hydroxyapatite, tricalcium phosphate, and the like. In some examples, the degradable polyester material includes, for example, polylactic acid, polycaprolactone, copolymers thereof, and the like.

Various embodiments of the present disclosure are described above in the detailed description. While these descriptions directly describe the above embodiments, it is to be understood that modifications and/or variations to the specific embodiments shown and described herein may occur to those skilled in the art. Any such modifications or variations that fall within the scope of the present description are intended to be included therein. It is the intention of the inventors that the words and phrases in the specification and claims be given the ordinary and customary meaning to the skilled artisan, unless otherwise indicated.

The foregoing description of various embodiments of the present disclosure known to the applicant at the time of filing the present application has been presented and is intended for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and many modifications and variations are possible in light of the above teaching. The described embodiments are intended to explain the principles of the disclosure and its practical application and to enable others skilled in the art to utilize the disclosure in various embodiments and with various modifications as are suited to the particular use contemplated. Therefore, it is intended that the disclosure not be limited to the particular embodiments disclosed for carrying out this disclosure.

While particular embodiments of the present disclosure have been shown and described, it will be obvious to those skilled in the art that, based upon the teachings of the present disclosure, changes and modifications may be made without departing from this disclosure and its broader aspects and, therefore, the appended claims are to encompass within their scope all such changes and modifications as are within the true spirit and scope of this disclosure. It will be understood by those within the art that, in general, terms used in the present disclosure are generally intended as "open" terms (e.g., the term "including" should be interpreted as "including but not limited to," the term "having" should be interpreted as "having at least," the term "includes" should be interpreted as "includes but is not limited to," etc.).

Claims

1. An intervertebral fusion device which is attached to vertebrae is characterized by comprising a main body part and a supporting part, wherein the main body part is flat; the support portion is formed at the main body portion and has a plurality of struts formed at the main body portion with an inclination, each of the plurality of struts includes one of first-type struts having a first inclination angle and one of second-type struts having a second inclination angle, the first-type struts and the second-type struts form an included angle, in each of the plurality of struts, the one of the first-type struts and the one of the second-type struts have a common base end, the base end being disposed on the main body portion, the first inclination angle being an included angle formed by the first-type struts and the main body portion, and the second inclination angle being an included angle formed by the second-type struts and the main body portion.

2. An intersomatic cage according to claim 1, characterized in that:

each of the plurality of struts includes one of a third class of struts having a third angle of inclination, the third angle of inclination being an angle formed by the third class of struts and the main body portion.

3. An intersomatic cage according to claim 2, characterized in that:

the inclination direction of the third type of pillars is different from the inclination direction of the first type of pillars and the inclination direction of the second type of pillars.

4. An intersomatic cage according to claim 1, characterized in that:

the struts of the first type are parallel to each other and the struts of the second type are parallel to each other.

5. An intersomatic cage according to claim 1, characterized in that:

the support portion includes cushioning portions provided at end portions of the first-type and second-type struts, respectively, which are in direct contact with vertebrae and inclined to fit the vertebrae when pressed.

6. An intersomatic cage according to claim 1, characterized in that:

the main body part has a net structure composed of polygons.

7. An intersomatic cage according to claim 1, characterized in that:

the main body portion is integrally formed with the support portion.

8. An intersomatic cage according to claim 1, characterized in that:

the main body is also filled with artificial bone.

9. An intersomatic cage according to claim 1, characterized in that:

the artificial bone is combined with the main body part in a hot pressing mode.

10. An intersomatic cage according to claim 8, characterized in that:

the body portion has a blind hole, and the blind hole is provided in a solid structure portion of the body portion along a length direction of the body portion.