CN213641422U - Intervertebral fusion device - Google Patents
Intervertebral fusion device Download PDFInfo
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- CN213641422U CN213641422U CN202020863097.XU CN202020863097U CN213641422U CN 213641422 U CN213641422 U CN 213641422U CN 202020863097 U CN202020863097 U CN 202020863097U CN 213641422 U CN213641422 U CN 213641422U
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Abstract
An embodiment of the utility model provides an intervertebral fusion ware relates to the medical instrument field. This intervertebral cage includes: the first support part, the second support part, the third support part and the fourth support part are arranged opposite to the first support part; two ends of the third supporting piece and the fourth supporting piece are respectively connected with one end of the first supporting piece and one end of the second supporting piece, and the third supporting piece and the fourth supporting piece are both arc-shaped structures positioned between the first supporting piece and the second supporting piece; the other end of the first supporting piece and the other end of the second supporting piece are provided with protruding portions, a pore portion is arranged between the first supporting piece and the second supporting piece, the first supporting piece and the second supporting piece are provided with first through holes penetrating through the first supporting piece, the second supporting piece, the third supporting piece, the fourth supporting piece and the pore portion, and the first through holes are communicated with the pore portion. Therefore, the pore part can be customized individually to meet the requirements of different elastic moduli.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to an interbody fusion cage.
Background
The interbody fusion cage has the functions of supporting, load sharing and the like, and can better recover the intervertebral space height and the physiological curvature of the spine. However, the existing intervertebral fusion cage mostly consists of a solid frame and a through hole structure, and cannot be customized according to the requirement of the elastic modulus.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides an interbody fusion cage can solve current interbody fusion cage and can't carry out individualized customized problem according to the elastic modulus demand.
To achieve the above objects, according to one aspect of the present invention, there is provided an intervertebral fusion device.
The utility model discloses intervertebral fusion ware of embodiment includes: the support device comprises a first support part, a second support part, a third support part and a fourth support part, wherein the second support part, the third support part and the fourth support part are arranged opposite to the first support part;
two ends of the third supporting piece and the fourth supporting piece are respectively connected with one end of the first supporting piece and one end of the second supporting piece, and the third supporting piece and the fourth supporting piece are both arc-shaped structures positioned between the first supporting piece and the second supporting piece; the other end of the first support piece and the other end of the second support piece are provided with protruding parts, a pore part is arranged between the first support piece and the second support piece, the first support piece and the second support piece are provided with first through holes penetrating through the first support piece and the second support piece, and the first through holes are communicated with the pore part.
Optionally, the first support and the second support are of the same structure, and each of the first support and the second support includes: a first connection portion, a second connection portion, a third connection portion, and a fourth connection portion;
the two ends of the first connecting portion are connected with one end of the second connecting portion and one end of the third connecting portion respectively, the two ends of the fourth connecting portion are connected with the other end of the second connecting portion and the other end of the third connecting portion respectively, and the first connecting portion, the second connecting portion, the third connecting portion and the fourth connecting portion are of arc-shaped structures.
Optionally, the curvatures of the first connecting portion, the fourth connecting portion, the third connecting portion and the second connecting portion are sequentially reduced, the third supporting member is located at a side close to the fourth connecting portion, the curvatures of the third supporting member and the fourth connecting portion are the same, the fourth supporting member is located at a side close to the first connecting portion, and the curvatures of the fourth supporting member and the first connecting portion are the same.
Optionally, a groove is provided on the third support.
Optionally, the aperture portion comprises: the device comprises a plurality of second through holes and a lattice structure arranged around the second through holes, wherein the second through holes are arrayed and arranged in a staggered mode.
Optionally, the lattice structure is a tetrahedral structure, an octahedral structure, or a sphere.
Optionally, the diameter of the second through hole is 100 μm to 1500 μm, the ratio of the volume of the second through hole to the volume of the void portion is 5% to 90%, and a distance D between two adjacent second through holes in different columns is providedtIs 1500 mu m or more than Dt＞800μm。
Optionally, the stiffness of the intersomatic cage is between 1000N/mm and 100000N/mm.
Optionally, the protrusion is a plurality of saw-tooth structures arranged in an array.
Optionally, the modulus of elasticity of the intersomatic cage does not exceed 20 GPa.
According to the technical scheme of the utility model, an embodiment in the above-mentioned utility model has following advantage or beneficial effect:
the embodiment of the present invention provides a intervertebral fusion cage, which comprises a first support, a second support, a third support, a fourth support.
Further effects of the above-mentioned non-conventional alternatives will be described below in connection with the embodiments.
Drawings
The accompanying drawings are included to provide a better understanding of the present invention and are not intended to constitute an undue limitation on the invention. Wherein:
FIG. 1 is one of the schematic views of an intervertebral cage according to an embodiment of the invention;
FIG. 2 is a second view of the intervertebral cage according to the embodiment of the present invention;
fig. 3 is a third schematic view of an intervertebral cage according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the invention are described below with reference to the accompanying drawings, in which various details of embodiments of the invention are included to assist understanding, and which are to be considered exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
Fig. 1 to 3 are schematic views of an intervertebral cage according to an embodiment of the present invention, which may be applied to a lumbar vertebra of a human body, referring to fig. 1 to 3. The intervertebral cage may specifically include: a first support 1, a second support 2, a third support 3 and a fourth support 4 arranged opposite to the first support 1; two ends of the third supporting member 3 and the fourth supporting member 4 are respectively connected with one end of the first supporting member 1 and one end of the second supporting member 2, and the third supporting member 3 and the fourth supporting member 4 are both arc-shaped structures located between the first supporting member 1 and the second supporting member 2; the other end of the first support member 1 and the other end of the second support member 2 are provided with a protruding portion 11, a pore portion 12 is arranged between the first support member 1 and the second support member 2, the first support member 1 and the second support member 2 are provided with a first through hole 13 which penetrates through the first support member 1, the second support member 2, the third support member 3, the fourth support member 4 and the pore portion 12, and the first through hole 13 is communicated with the pore portion 12.
In the embodiment of the present invention, a gap for accommodating the pore portion 12 is formed between the first support member 1 and the second support member 2 through the third support member 3 and the fourth support member 4, the pore portion 12 is filled up between the first support member 1 and the second support member 2 and at a position other than the third support frame, and the pore portion 12 can be customized according to the requirements of different elastic moduli, so that the intervertebral fusion cage can satisfy the requirements of different elastic moduli, and under the premise of satisfying the requirements of the elastic moduli, the porosity can be increased, and the bone ingrowth effect is good.
In the embodiment of the present invention, the first through hole 13 is used for implanting a bone fragment, which is beneficial to bone growth and bone fusion. The shape of the first through hole 13 may be a regular shape or an irregular shape such as a circle or a rectangle. In order to ensure the uniform wall thickness around the first through hole 13, the shape of the first through hole 13 may be similar to the shape of the first support 1 and the second support 2. It will be understood that the first support 1 and the second support 2 are annular plate-like structures, such as: the first supporting piece 1 and the second supporting piece 2 are both crescent-shaped bent structures.
In some embodiments, the first support 1 and the second support 2 may adopt the same structure. For example: with continued reference to fig. 1, the first support 1 and the second support 2 each comprise: a first connection portion 14, a second connection portion 15, a third connection portion 16, and a fourth connection portion 17; the two ends of the first connecting portion 14 are connected to one end of the second connecting portion 15 and one end of the third connecting portion 16, the two ends of the fourth connecting portion 17 are connected to the other end of the second connecting portion 15 and the other end of the third connecting portion 16, and the first connecting portion 14, the second connecting portion 15, the third connecting portion 16 and the fourth connecting portion 17 are all arc-shaped structures.
With continued reference to fig. 1, the curvatures of the first connecting portion 14, the fourth connecting portion 17, the third connecting portion 16 and the second connecting portion 15 are sequentially reduced, and the first connecting portion 14, the second connecting portion 15, the third connecting portion 16 and the fourth connecting portion 17 jointly form a crescent-shaped curved structure (or called a kidney-shaped structure), so that the intervertebral fusion cage can be fitted to the shape of the lumbar vertebra joint.
With continued reference to fig. 1, further, the third supporting member 3 is located at a side close to the fourth connecting portion 17, the curvature of the third supporting member 3 is the same as that of the fourth connecting portion 17, the fourth supporting member 4 is located at a side close to the first connecting portion 14, and the curvature of the fourth supporting member 4 is the same as that of the first connecting portion 14.
With continued reference to fig. 1 to 3, in order to facilitate the implantation of the intervertebral cage in the lumbar spine, a recess 31 may be provided on the third support 3, wherein the recess 31 may be a through hole or a blind hole, and one of the openings of the recess 31 may be directed towards a side facing away from the fourth support 4. It will be appreciated that the recess 31 is intended to facilitate gripping by a delivery tool when the intervertebral cage is installed, and the shape of the recess 31 may be determined according to the shape of the delivery tool. Preferably, referring to fig. 2 and 3, the recess 31 is a rectangular recess so that a delivery tool can be inserted into the recess 31 from one side of the fourth connecting portion 17 to hold the intervertebral cage.
Since the surface of the interbody cage has a small friction coefficient, there is a problem that the interbody cage is loosened and displaced in a later stage after being implanted into the lumbar vertebrae. In order to solve this problem, the first support 1 and the second support 2 are portions that contact the lumbar vertebrae, and the first support 1 and the second support 2 are provided with the protrusions 11, it being understood that the protrusions 11 are provided on one side surface of the first support that is away from the second support and one side surface of the second support that is away from the first support. The protruding part 11 is a plurality of sawtooth structures that the array set up, can play skid-proof effect through a plurality of sawtooth structures that the array set up.
The embodiment of the utility model provides an in, through with the conveying tool cartridge in the recess 31, can be favorable to sending into the interbody assigned position with the fusion cage, then the rethread protruding portion 11 is fixed the interbody fusion cage, can prevent to produce not hard up and the problem of aversion in the use.
In the embodiment of the present invention, the hole portion 12 can also play a supporting role. With continued reference to fig. 1-3, the aperture portion 12 includes: a plurality of second through holes 121 and a lattice structure 122 disposed around the second through holes 121, the plurality of second through holes 121 being arranged in an array and staggered, the second through holes 121 may facilitate bone ingrowth and fusion; the porosity can be ensured to be maximum by the pore part 12 on the premise of meeting the requirements of elastic modulus and printing and safety strength. And the aperture and the porosity of the second through hole can be customized according to needs to meet the requirements of different elastic moduli. The porosity is a ratio of the volume of the second through hole 121 to the volume of the entire pore portion 12.
It should be noted that the modulus of elasticity of the intervertebral cage is very small, not exceeding 20 GPa. The elastic modulus of this interbody fusion cage can be customized according to the demand in patient affected part, and it can be understood that this interbody fusion cage's elastic modulus is not restricted and does not exceed 20GPa, the embodiment of the utility model provides a do not specifically restrict interbody fusion cage elastic modulus.
Also, the modulus of elasticity of the cage is related to the porosity of the void portion 12 and the shape of the lattice structure 122. The size and shape of the second through hole 121 and the shape of the lattice structure 122 can be determined according to the requirements of the affected part. That is, the size and shape of the second through hole 121 and the shape of the lattice structure 122 can be customized according to the requirement of the elastic modulus of the affected part and related algorithms. Preferably, the second through holes 121 are circular through holes, and the lattice structure 122 may be a tetrahedral structure or an octahedral structure, although not limited thereto.
In order to enable the intervertebral cage to be adapted to the shape of the lumbar spine, the diameter D of the second through hole 121 may be 100 μm to 1500 μm, the ratio of the volume of the second through hole 121 to the volume of the aperture part 12 may be 5% to 90%, and the distance D between two adjacent second through holes 121 in different rowst(or called rod diameter) may be 100 μm to 1500. mu.m. And the compression rigidity of the interbody fusion cage is close to the rigidity of human skeleton, so as to reduce the stress shielding effect, and the rigidity of the interbody fusion cage can be 1000N/mm-100000N/mm. Preferably, in order to meet the requirement of the elastic modulus, the diameter D of the second through hole 121 may be 100 μm to 1500 μm, the ratio of the volume of the second through hole 121 to the volume of the pore portion 12 may be 5% to 90%, and the distance D between two adjacent second through holes 121 located in different columns and adjacent to each othertCan be more than or equal to D with the diameter of 1500 mu mt＞800μm。
The diameters of the second through holes 121, the volume ratio of the second through holes 121 to the void 12, and the distance D between two adjacent second through holes 121 located in different rows are described abovetThe description of the value range is only an example and not a limitation, and it is understood that the embodiment of the invention does not specifically limit the diameter of the second through hole 121, the volume ratio of the volume of the second through hole 121 to the volume of the pore portion 12, and the distance D between two adjacent second through holes 121 located in different columnstThe value range of (a).
The embodiment of the utility model provides an in, interbody fusion cage can be through the technological mode integrated into one piece that 3D printed.
The interbody fusion cage can be made of polyether ether ketone (PEEK), titanium alloy and other materials, wherein the interbody fusion cage made of the PEEK material has no bioactivity, can not be truly fused with upper and lower bony endplate tissues, most surfaces are covered by fibrous tissues, micro motion is easy to generate, the biomechanical stability between vertebral bodies is further influenced, and the stability of the whole structure can not be guaranteed. The intervertebral fusion device made of the titanium alloy material has better biocompatibility and supporting strength. It can be understood that the material of the intervertebral fusion device according to the embodiment of the present invention is preferably titanium alloy. It should be noted that the above description of the material of the intervertebral cage is only exemplary and not limiting.
The embodiment of the utility model provides an in, this interbody fusion cage can be printed integrated into one piece by titanium alloy 3D, and this interbody fusion cage's elastic modulus is close people's bone elastic modulus, avoids taking place stress shielding. The fusion cage can be conveniently sent to an intervertebral designated position by inserting a conveying tool into the groove 31, and then the fusion cage is fixed through the convex part 11, so that the problems of looseness and displacement can be prevented in the using process. The porosity can be increased by arranging the pore parts 12 around the interbody fusion cage, so that the interbody fusion cage is beneficial to bone growth and promotion of bone fusion, and can meet the requirements of fusion surgery between cervical vertebrae.
The above detailed description does not limit the scope of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An intervertebral cage, comprising: the support comprises a first support (1), a second support (2) arranged opposite to the first support (1), a third support (3) and a fourth support (4);
two ends of the third supporting piece (3) and the fourth supporting piece (4) are respectively connected with one end of the first supporting piece (1) and one end of the second supporting piece (2), and the third supporting piece (3) and the fourth supporting piece (4) are both arc-shaped structures positioned between the first supporting piece (1) and the second supporting piece (2); the other end of first support piece (1) with the other end of second support piece (2) is provided with bellying (11) be provided with pore portion (12) between first support piece (1) with second support piece (2), first support piece (1) with second support piece (2) are provided with and run through first through-hole (13) of first support piece (1) with second support piece (2), first through-hole (13) with pore portion (12) intercommunication.
2. Intervertebral cage according to claim 1, characterized in that the first support (1) and the second support (2) adopt the same structure, the first support (1) and the second support (2) each comprising: a first connection portion (14), a second connection portion (15), a third connection portion (16), and a fourth connection portion (17);
the two ends of the first connecting portion (14) are connected with one end of the second connecting portion (15) and one end of the third connecting portion (16) respectively, the two ends of the fourth connecting portion (17) are connected with the other end of the second connecting portion (15) and the other end of the third connecting portion (16) respectively, and the first connecting portion (14), the second connecting portion (15), the third connecting portion (16) and the fourth connecting portion (17) are of arc-shaped structures.
3. An intersomatic cage according to claim 2, characterized in that the curvatures of the first (14), fourth (17), third (16) and second (15) connection portions decrease in succession, the curvature of the third support (3) being located close to the fourth connection portion (17), the curvature of the third support (3) being the same as the curvature of the fourth connection portion (17), the curvature of the fourth support (4) being located close to the first connection portion (14), the curvature of the fourth support (4) being the same as the curvature of the first connection portion (14).
4. Intervertebral cage according to claim 2, characterized in that the third support (3) is provided with a groove (31).
5. The intersomatic cage according to claim 1, characterized in that the aperture portion (12) comprises: a plurality of second through holes (121) and a lattice structure (122) arranged around the second through holes (121), wherein the plurality of second through holes (121) are arrayed and staggered.
6. The intersomatic cage according to claim 5, characterized in that the lattice structure (122) is a tetrahedral structure, an octahedral structure or a sphere.
7. The intersomatic cage according to claim 5, characterized in that the diameter of the second through-holes (121) is between 100 μm and 1500 μm, the ratio of the volume of the second through-holes (121) to the volume of the void (12) is between 5% and 90%, and the distance D between two adjacent second through-holes (121) in different columns is greater than the distance D between two adjacent second through-holes (121)tIs 1500 mu m or more than Dt＞800μm。
8. An intersomatic cage according to claim 1, characterized in that the stiffness of the intersomatic cage is between 1000N/mm and 100000N/mm.
9. An intersomatic cage according to claim 1, characterized in that the projections (11) are a plurality of saw-tooth formations arranged in an array.
10. An intersomatic cage according to claim 1, characterized in that the modulus of elasticity of the intersomatic cage does not exceed 20 GPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020863097.XU CN213641422U (en) | 2020-05-21 | 2020-05-21 | Intervertebral fusion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020863097.XU CN213641422U (en) | 2020-05-21 | 2020-05-21 | Intervertebral fusion device |
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| CN213641422U true CN213641422U (en) | 2021-07-09 |
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| CN202020863097.XU Active CN213641422U (en) | 2020-05-21 | 2020-05-21 | Intervertebral fusion device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023035580A1 (en) * | 2021-09-13 | 2023-03-16 | 智塑健康科技(嘉兴)有限公司 | Fusion cage |
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- 2020-05-21 CN CN202020863097.XU patent/CN213641422U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023035580A1 (en) * | 2021-09-13 | 2023-03-16 | 智塑健康科技(嘉兴)有限公司 | Fusion cage |
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