CN217793480U - Detachable assembly type cervical vertebra fusion cage - Google Patents
Detachable assembly type cervical vertebra fusion cage Download PDFInfo
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- CN217793480U CN217793480U CN202220459813.7U CN202220459813U CN217793480U CN 217793480 U CN217793480 U CN 217793480U CN 202220459813 U CN202220459813 U CN 202220459813U CN 217793480 U CN217793480 U CN 217793480U
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Abstract
The utility model discloses a detachable assembled cervical vertebra fusion cage, which comprises a main body frame, an assembled bone grafting frame, a porous structure and a porous assembly block; the assembly bone grafting frame is positioned in the middle of the main body frame, the porous structure is filled between the main body frame and the assembly bone grafting frame, the assembly bone grafting frame is provided with a cavity, and the cavity is used for implanting osteogenic materials or porous assembly blocks. The main body frame is used for bearing most of compression force, shearing force, lateral bending force and torsion force transmitted by the upper and lower vertebral bodies; the porous structure is used for promoting the adhesion, proliferation, migration and differentiation of cells and accelerating bone ingrowth and bone bonding; the porous assembly block is convenient for selectively providing functions of promoting bone materials, promoting bone growth into space or mechanical support according to specific individual conditions of patients. The equivalent elastic modulus of the whole structural unit is closer to that of human bones (the elastic modulus of cancellous bones is 0.5-3 GPa, and the elastic modulus of cortical bones is 12-18 GPa), so that the stress shielding effect can be avoided, and the fusion rate is accelerated.
Description
Technical Field
The utility model relates to the technical field of medical equipment, in particular to detachable assembly type cervical vertebra fusion cage.
Background
Along with the change of the practical structure in China, the proportion of patients with cervical spondylosis is gradually increased, wherein cervical vertebra instability and lumbar vertebra instability caused by degenerative diseases are one of the key factors threatening the healthy life. The existing cervical vertebra fusion cage has unsatisfactory bone growth effect after being implanted into the body and low postoperative fusion rate. In addition, the current fusion cage still has the problems of vertebral body subsidence, stress shielding and poor matching performance, and meanwhile, the fusion cage cannot be used for making a multipurpose choice according to the conditions of the actual bone condition, the age, the bone grafting allowance degree and the like of a patient.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a detachable assembly formula cervical vertebra fuses ware, not only solve current traditional fusion ware and subside problem, stress and shelter from problem and accurate matching problem, can also be according to the suitable assembly scheme of patient's health preferred, realize more excellent cell growth and bone bonding.
The technical scheme of the utility model is that: a detachable assembled cervical vertebra fusion cage comprises a main body frame, an assembled bone grafting frame, a porous structure and a porous assembly block;
the assembly bone grafting frame is positioned in the middle of the main body frame, the porous structure is filled between the main body frame and the assembly bone grafting frame, the assembly bone grafting frame is provided with a cavity, and the cavity is used for implanting osteogenic materials or porous assembly blocks.
Furthermore, each side of the main body frame is provided with an opening, and porous materials are filled in the openings. Can promote cell adhesion, proliferation, migration and differentiation, and accelerate bone ingrowth and bone bonding.
Furthermore, each side face of the main body frame is a curved face, and the joint of two adjacent side faces adopts arc transition. So that the whole structure of the cervical vertebra fusion cage is smooth, and the trauma to the surrounding tissues of the patient in the operation process is reduced.
Furthermore, one side of the main body frame is provided with a leading-in end, one end of the leading-in end is connected with the assembly bone grafting frame, a leading-in screw hole is formed in the leading-in end, and the leading-in screw hole is communicated with a cavity of the assembly bone grafting frame. The lead-in screw hole is convenient for the lead-in implantation of cervical vertebra fusion cage, and the lead-in screw hole is convenient for later stage medicine support with the cavity intercommunication of assembly bone grafting frame.
Further, the assembly bone grafting frame is in a regular hexagonal prism shape, and the cross section of the assembly bone grafting frame is in a regular hexagon shape; the porous assembling block is in a regular hexagonal prism shape, the cross section of the porous assembling block is in a regular hexagon shape, and the porous assembling block is detachably embedded into the cavity.
Furthermore, the bottom of the assembly bone grafting frame is convexly provided with a micro-platform which is used for bearing the porous assembly block. Through setting up little platform, prevent that porous assembly piece from dropping.
Furthermore, the porous assembling block is made of the same material and has the same porous structure, and the porous assembling block can be detachably arranged in a cavity for assembling the bone grafting frame.
Further, the porosity of the porous structure is 60-95%, and the pore size is 400-1000 μm.
Further, the material and the porous structure adopted by the assembly bone grafting frame are the same.
Further, the main body frame, the assembly bone grafting frame and the porous structure are integrally printed and formed.
Compared with the prior art, the utility model, following beneficial effect has:
the utility model relates to a detachable assembled cervical vertebra fusion cage, a main body frame is used for bearing most of the compression force, the shearing force, the lateral bending force and the torsion force transmitted by the upper and the lower centrum; the porous structure is used for promoting the adhesion, proliferation, migration and differentiation of cells and accelerating bone ingrowth and bone bonding; the porous assembling block is convenient to selectively provide functions of promoting bone materials, promoting bone growth into a space or mechanically supporting according to specific individual conditions of a patient. The equivalent elastic modulus of the whole structural unit is close to that of human bone (the elastic modulus of cancellous bone is 0.5-3 GPa, and the elastic modulus of cortical bone is 12-18 GPa), so that the stress shielding effect can be avoided, and the fusion rate is accelerated. The main body frame is smooth as a whole, and reduces the trauma to the surrounding tissues of the patient in the operation process.
Drawings
Fig. 1 is a schematic structural view of the detachable assembled cervical vertebra fusion cage of the present invention.
Fig. 2 is a schematic structural diagram of the main body frame of the present invention.
Fig. 3 is a cross-sectional view of fig. 2.
Fig. 4 is an assembly diagram of the porous assembly block and the main body frame of the present invention.
Fig. 5 is a sectional view of the detachable assembled cervical vertebra fusion cage of the utility model.
The bone grafting device comprises a main body frame 1, a leading-in end 11, a leading-in screw hole 12, an assembly bone grafting frame 2, a cavity 21, a porous structure 3 and a porous assembly block 4.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Examples
As shown in fig. 1 and 4, the present embodiment provides a detachable assembly type cervical cage, which comprises a main body frame 1, an assembly bone grafting frame 2, a porous structure 3 and a porous assembly block 4.
As shown in fig. 1, 2 and 3, the assembled bone grafting frame is located at the middle of the main body frame, the porous structure is filled between the main body frame and the assembled bone grafting frame, and the assembled bone grafting frame is provided with a cavity 21 for implanting bone material or porous assembly blocks.
As shown in fig. 1 and 2, each side of the main body frame is provided with an opening filled with a porous material. The porous material can promote cell adhesion, proliferation, migration and differentiation, and accelerate bone ingrowth and bone bonding. Each side face of the main body frame is a curved face, and the joint of two adjacent side faces adopts arc transition. So that the whole structure of the cervical vertebra fusion cage is smooth, and the trauma to the surrounding tissues of the patient in the operation process is reduced.
As shown in fig. 2, 3, 4 and 5, one side of the main body frame is provided with a lead-in end 11, one end of the lead-in end is connected with the bone-grafting assembling frame, the lead-in end is provided with a lead-in screw hole 12, and the lead-in screw hole is communicated with the cavity of the bone-grafting assembling frame. The lead-in screw hole is convenient for the lead-in implantation of cervical vertebra fusion cage, and the lead-in screw hole is convenient for later stage medicine support with the cavity intercommunication of assembly bone grafting frame.
As shown in fig. 4, the porous mounting block has a shape and size matching the shape and size of the cavity into which it is removably inserted. The bottom protrusion of assembly bone grafting frame sets up little platform, and little platform is used for the porous assembly piece of bearing. Through setting up little platform, prevent that porous assembly piece from dropping. In this embodiment, the assembled bone graft frame has a regular hexagonal prism shape, and the cross-sectional shape of the assembled bone graft frame is a regular hexagon; the porous assembling block is in a regular hexagonal prism shape, the cross section of the porous assembling block is in a regular hexagon shape, and the porous assembling block is detachably embedded into the cavity.
The porosity of the porous structure is 60-95%, and the pore size is 400-1000 μm. In this embodiment, the materials used for assembling the bone grafting frame and the porous assembling block are the same as the porous structure, and the main body frame, the bone grafting frame and the porous structure are integrally formed by printing.
The utility model discloses a detachable assembly formula cervical vertebra fuses ware, the equivalent elastic modulus of overall structure unit is more close with people's bone (the elastic modulus of cancellous bone is at 0.5 ~ 3GPa, the elastic modulus of cortex bone is at 12 ~ 18 GPa) elastic modulus, consequently can avoid producing stress shielding effect for fuse speed.
The utility model discloses a detachable assembly formula cervical vertebra fuses ware, can select the TC4 that biocompatibility is good, TC4ELI, TA4, in PEEK or the Ta material one, through SLM, EBM or FDM vibration material disk manufacturing mode make and form, also can make the constitution of material and structure along certain direction printing with the technique of wherein multiple different performance through compound or concatenation make, and then obtain the product that has multiple performance concurrently, its intensity is high, mechanical properties is close the mechanical properties of human skeleton, still have characteristics such as fatigue-resistant, corrosion-resistant and biocompatibility are good. Through strict optimization screening, the materials meeting the requirements of a human body are determined, and a 3D printing detachable assembly type cervical vertebra fusion cage suitable for a patient is designed.
As described above, the present invention can be realized better, and the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; all equivalent changes and modifications made according to the present invention are intended to be covered by the scope of the claims of the present invention.
Claims (10)
1. A detachable assembled cervical vertebra fusion cage is characterized by comprising a main body frame, an assembled bone grafting frame, a porous structure and a porous assembling block;
the assembly bone grafting frame is positioned in the middle of the main body frame, the porous structure is filled between the main body frame and the assembly bone grafting frame, the assembly bone grafting frame is provided with a cavity, and the cavity is used for implanting osteogenic materials or porous assembly blocks.
2. The detachable assembled cervical fusion cage of claim 1, wherein the main body frame is provided at each side thereof with an opening filled with a porous material.
3. The detachable assembled cervical fusion cage of claim 1, wherein each side of the main frame is a curved surface, and the junction of two adjacent sides is an arc transition.
4. The detachable cervical fusion cage according to claim 1, wherein a lead-in port is formed at one side of the main frame, one end of the lead-in port is connected to the bone grafting frame, a lead-in screw hole is formed at the lead-in port, and the lead-in screw hole is communicated with the cavity of the bone grafting frame.
5. The detachable assembled cervical fusion cage of claim 1, wherein the assembled bone grafting frame has a regular hexagonal prism shape, and the cross-sectional shape of the assembled bone grafting frame is a regular hexagon; the porous assembling block is in a regular hexagonal prism shape, the cross section of the porous assembling block is in a regular hexagon shape, and the porous assembling block is detachably embedded into the cavity.
6. The detachable cervical fusion cage of claim 1, wherein a micro-platform is protruded from the bottom of the bone grafting frame for supporting the porous assembly block.
7. The detachably assembled cervical fusion cage of claim 1, wherein the porous assembly blocks are made of the same material and have the same porous structure.
8. The detachable assembled cervical fusion cage of claim 1, wherein the porous structure has a porosity of 60-95% and a pore size of 400-1000 μm.
9. The detachable assembled cervical fusion cage of claim 1, wherein the assembled bone grafting frame is made of the same material and has a porous structure.
10. The detachable assembled cervical fusion cage of claim 1, wherein the main body frame, the assembled bone grafting frame and the porous structure are integrally printed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220459813.7U CN217793480U (en) | 2022-03-03 | 2022-03-03 | Detachable assembly type cervical vertebra fusion cage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220459813.7U CN217793480U (en) | 2022-03-03 | 2022-03-03 | Detachable assembly type cervical vertebra fusion cage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217793480U true CN217793480U (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220459813.7U Active CN217793480U (en) | 2022-03-03 | 2022-03-03 | Detachable assembly type cervical vertebra fusion cage |
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| Country | Link |
|---|---|
| CN (1) | CN217793480U (en) |
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2022
- 2022-03-03 CN CN202220459813.7U patent/CN217793480U/en active Active
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