CN211131558U - Intervertebral disc prosthesis - Google Patents
Intervertebral disc prosthesis Download PDFInfo
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- CN211131558U CN211131558U CN201921259953.4U CN201921259953U CN211131558U CN 211131558 U CN211131558 U CN 211131558U CN 201921259953 U CN201921259953 U CN 201921259953U CN 211131558 U CN211131558 U CN 211131558U
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- intervertebral disc
- disc prosthesis
- stent
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Abstract
The utility model provides an intervertebral disc prosthesis, include: the support is made of memory alloy and comprises a first structure, a second structure and a third structure which are connected in sequence, wherein two ends of the third structure are respectively connected with the first structure and the second structure, the first structure and the second structure are arranged at intervals, and an opening is formed between the first structure and the second structure; the stent has a constraint state and a natural state, and the opening size of the opening of the stent in the constraint state is smaller than the opening size of the opening of the stent in the natural state; the elastic part is arranged between the first structure and the second structure, one side of the elastic part is connected with the first structure, and the other side of the elastic part is connected with the second structure. Through the technical scheme provided by the utility model, can solve the problem that intervertebral disc prosthesis among the prior art is difficult to implant to can warp under stress environment, satisfy human basic motion function.
Description
Technical Field
The utility model relates to the technical field of medical equipment, particularly, relate to an intervertebral disc prosthesis.
Background
After pathological changes occur to cervical or lumbar intervertebral discs of a human body, operation treatment may be needed, one of the operations is fusion operation, mobility of a postoperative operation segment is lost, and degeneration of an adjacent segment can be increased theoretically, so doctors begin to think and perform an operation of artificial intervertebral disc replacement, aim at retaining mobility between the vertebral segments, and mainly used for the cervical vertebra at present. Lumbar artificial intervertebral discs are currently less developed.
The nucleus pulposus at the central part of the human intervertebral disc is an elastic gelatinous substance, the fibrous rings at the peripheral parts are arranged according to concentric circles by multiple layers of fibrous cartilage rings and connected with the upper vertebral body and the lower vertebral body, and the vertebral disc not only has the functions of stabilizing the vertebral column, absorbing vibration, transferring load and distributing stress, but also has a decisive function on the movement of the vertebral column. The nucleus pulposus is affected by factors and is easy to prolapse backwards and outwards, protrudes into the vertebral canal or intervertebral foramen and presses the spinal cord or the myelination to form the prolapse of intervertebral disc.
Spinal fusion is one of the methods currently used to alleviate herniated intervertebral discs, where the affected disc is first removed and then an artificial implant is implanted. The material used for the implant should have good biocompatibility to effectively bridge the gap left after the disc has been removed.
Artificial disc replacement (TDR) is a new method for treating degenerative disc disease in recent years and has begun clinical use in the 80's of the 20 th century. It not only excises the pathological intervertebral disc, but also recovers the stability and the activity function of the segment, and theoretically can avoid the degeneration and acceleration of the adjacent segments caused by spinal fusion. The artificial intervertebral disc replacement is mainly used for treating intervertebral disc degenerative diseases such as intervertebral disc source lumbago and the like.
In recent years, research and application of artificial intervertebral discs are carried out at home and abroad, and the aims of the artificial intervertebral discs are to achieve the effects of human intervertebral disc excision, decompression, fixation and fusion, prevent adjacent segments from degeneration and maintain the physiological motion range of the spine.
The existing intervertebral disc prosthesis is formed by combining a plurality of parts and is limited by the structure of the intervertebral disc prosthesis and the structure of a vertebral body in an operation area, and the existing intervertebral disc prosthesis has the problem that the existing intervertebral disc prosthesis is difficult to implant into the vertebral body structure of a human body.
SUMMERY OF THE UTILITY MODEL
The utility model provides an intervertebral disc prosthesis, which solves the problem that the intervertebral disc prosthesis in the prior art is difficult to be implanted into a human body.
In order to solve the above problems, the present invention provides an intervertebral disc prosthesis, comprising: the support is made of memory alloy and comprises a first structure, a second structure and a third structure which are connected in sequence, wherein two ends of the third structure are respectively connected with the first structure and the second structure, the first structure and the second structure are arranged at intervals, and an opening is formed between the first structure and the second structure; the stent has a constraint state and a natural state, and the opening size of the opening of the stent in the constraint state is smaller than the opening size of the opening of the stent in the natural state; the elastic part is arranged between the first structure and the second structure, one side of the elastic part is connected with the first structure, and the other side of the elastic part is connected with the second structure.
Further, the first structure comprises a first supporting part and a first trabecular bone layer arranged on the first supporting part, and the first supporting part is connected with the third structure; the second structure comprises a second supporting part and a second bone trabecula layer arranged on the second supporting part, the second supporting part is connected with the third structure, and the elastic part is arranged between the first supporting part and the second supporting part.
Further, the first trabecular bone layer and the second trabecular bone layer are both porous structures.
Furthermore, the first supporting part comprises a first plate body and a first limiting part arranged on one side of the first plate body, the first trabecular bone layer is arranged on the other side of the first plate body, the first plate body is connected with the third structure, and the first limiting part is in limiting fit with one side of the elastic part; the second supporting part comprises a second plate body and a second limiting part arranged on one side of the second plate body, the second trabecular bone layer is arranged on the other side of the second plate body, the second plate body is connected with the third structure, and the second limiting part is in limiting fit with the other side of the elastic part.
Furthermore, the first limiting part is provided with a first limiting groove, the second limiting part is provided with a second limiting groove, the first limiting part and the second limiting part are arranged at intervals, and the elastic part is arranged between the first limiting groove and the second limiting groove.
The first supporting part further comprises a first fixing part, the first fixing part is arranged at one end, far away from the third structure, of the first plate body, the first fixing part protrudes out of the first bone trabecular layer, and the first fixing part is used for being connected with a vertebral body structure of a person; the second supporting portion further comprises a second fixing piece, the second fixing piece is arranged at one end, far away from the third structure, of the second plate body, the second fixing piece protrudes out of the second bone trabecula layer, and the second fixing piece is used for being connected with a vertebral body structure of a person.
Further, the support is an integrally formed structure manufactured through 3D printing, and the support is made of nickel-titanium alloy.
Further, the elastic portion is made of a polymer material.
Further, the elastic part is made of polyurethane, polyvinyl alcohol gel or polylactic acid material through injection molding.
Further, the elastic part is of an ellipsoidal structure, the third structure is of a plate-shaped structure, and the length direction of the elastic part is arranged along the length direction of the third structure.
Further, the intervertebral disc prosthesis further comprises: and the silica gel sleeve is filled in the cavity among the first structure, the second structure, the third structure and the elastic part.
Use the technical scheme of the utility model, set up support and elasticity portion in intervertebral disc prosthesis, the support is including the first structure, second structure and the third structure that connect in order, and elasticity portion sets up between first structure and second structure, has the opening between first structure and the second structure. Since the stent is made of memory alloy, the stent has a constrained state and a natural state, i.e., the stent can be changed into the constrained state by applying constraint by a tool or a change in temperature, so that the size of the opening can be reduced, which can also be understood as reducing the height of the stent, and when the constraint is removed or the original temperature is restored, the stent is changed into the natural state and the opening is restored to the normal size.
Therefore, before the intervertebral disc prosthesis is implanted into a vertebral body structure of a human body, the support is firstly changed into a constraint state, so that the overall size of the intervertebral disc prosthesis can be reduced, the intervertebral disc prosthesis is conveniently implanted into a pathological change position of the vertebral body structure in a limited space, and the support is restored to a natural state after being implanted, so that the intervertebral disc prosthesis is fused with the vertebral body structure of the human body and is normally used. When the memory alloy is implanted, the prosthesis with a proper opening angle is selected, the front end of the bracket is compressed by an implantation tool to form deformation, the prosthesis is naturally expanded after being implanted, and meanwhile, the memory alloy has the function of recovering the original state, so that the prosthesis can be recovered to the preset angle of the prosthesis required by the pathological change part of a human body.
And the elastic part between the first structure and the second structure can deform under the stress environment so as to meet the basic motion function of the human body. The elastic part is made of polymer materials, has good ductility, breaking strength, wear resistance and biocompatibility, and can be well combined with the stent to ensure the overall performance of long-term implantation of the prosthesis. And the arrangement of the bracket can prevent the intervertebral space from being narrowed again caused by height loss, ensure the long-term reliable use of the intervertebral disc prosthesis and avoid the degeneration of the adjacent intervertebral disc.
Furthermore, the intervertebral disc prosthesis is of an integral structure, has high connection strength and good stability, avoids the problems that the intervertebral disc prosthesis adopting a plurality of components needs to be assembled and combined and the components are easy to separate, and is convenient for the operation of doctors.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural diagram of an intervertebral disc prosthesis provided by an embodiment of the present invention;
fig. 2 shows a front view of the intervertebral disc prosthesis of fig. 1;
FIG. 3 shows a cross-sectional view of FIG. 2 at position A-A;
FIG. 4 shows a cross-sectional view of FIG. 2 at position B-B;
fig. 5 is a schematic structural view of an intervertebral disc prosthesis provided by an embodiment of the present invention with a silicone sleeve removed;
FIG. 6 shows a schematic structural view of the stent of FIG. 1;
FIG. 7 shows a front view of the stand of FIG. 6;
FIG. 8 shows a cross-sectional view of FIG. 7 at a position C-C;
fig. 9 shows a cross-sectional view of fig. 7 at position D-D.
Wherein the figures include the following reference numerals:
10. a first structure; 11. a first support section; 111. a first plate body; 112. a first limit piece; 113. a first fixing member; 12. a first trabecular bone layer; 20. a second structure; 21. a second support portion; 211. a second plate body; 212. a second limiting member; 213. a second fixing member; 22. a second trabecular bone layer; 30. a third structure; 40. an elastic portion; 50. and (4) a silica gel sleeve.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 9, an embodiment of the present invention provides an intervertebral disc prosthesis, including: the stent is made of memory alloy and comprises a first structure 10, a second structure 20 and a third structure 30 which are connected in sequence, wherein the two ends of the third structure 30 are respectively connected with the first structure 10 and the second structure 20, the first structure 10 and the second structure 20 are arranged at intervals, and an opening is arranged between the first structure 10 and the second structure 20; the stent has a constraint state and a natural state, and the opening size of the opening of the stent in the constraint state is smaller than the opening size of the opening of the stent in the natural state; and an elastic part 40 disposed between the first structure 10 and the second structure 20, wherein one side of the elastic part 40 is connected to the first structure 10, and the other side of the elastic part 40 is connected to the second structure 20.
Use the technical scheme of the utility model, set up support and elastic component 40 in intervertebral disc prosthesis, the support is including the first structure 10, second structure 20 and the third structure 30 that connect in order, and elastic component 40 sets up between first structure 10 and second structure 20, has the opening between first structure 10 and the second structure 20. Since the stent is made of memory alloy, the stent has a constrained state and a natural state, i.e., the stent can be changed into the constrained state by applying constraint by a tool or change of ambient temperature, so that the size of the opening can be reduced, which can also be understood as reducing the height of the stent, and when the constraint is removed or the original temperature is restored, the stent is changed into the natural state and the opening is restored to the normal size.
Therefore, before the intervertebral disc prosthesis is implanted into a vertebral body structure of a human body, the support is firstly changed into a constraint state, so that the overall size of the intervertebral disc prosthesis can be reduced, the intervertebral disc prosthesis is conveniently implanted into a pathological change position of the vertebral body structure in a limited space, and the support is restored to a natural state after being implanted, so that the intervertebral disc prosthesis is fused with the vertebral body structure of the human body and is normally used. Moreover, the elastic part 40 between the first structure 10 and the second structure 20 can deform under stress environment, and the support can also elastically deform, so that the support and the elastic part 40 are matched with each other to meet the basic motion function of the human body. When the memory alloy is implanted, the prosthesis with a proper opening angle is selected, the front end of the bracket is compressed by an implantation tool to form deformation, the prosthesis is naturally expanded after being implanted, and meanwhile, the memory alloy has the function of recovering the original state, so that the prosthesis can be recovered to the preset angle of the prosthesis required by the pathological change part of a human body.
In the present embodiment, the first structure 10 includes a first support 11 and a first trabecular bone layer 12 provided on the first support 11, the first support 11 being connected to the third structure 30; the second structure 20 includes a second support portion 21 and a second trabecular bone layer 22 disposed on the second support portion 21, the second support portion 21 being connected with the third structure 30, the elastic portion 40 being disposed between the first support portion 11 and the second support portion 21. The first and second trabecular bone layers 12, 22 provide a connection to the upper and lower body vertebral structures of the intervertebral disc prosthesis.
In this embodiment, the first and second trabecular bone layers 12, 22 are each porous structures. Thus being convenient to be combined with the vertebral body structure of a patient to realize biological fusion. The first and second trabecular bone layers 12, 22 may be formed using 3D printing or chemical vapor infiltration. The first trabecular bone layer 12 and the second trabecular bone layer 22 are provided with a plurality of pores, the size of each pore is 0.3 mm-1.5 mm, and the porosity of the first trabecular bone layer 12 and the second trabecular bone layer 22 is more than 50%.
Specifically, the first supporting portion 11 includes a first plate 111 and a first limiting member 112 disposed on one side of the first plate 111, the first trabecular bone layer 12 is disposed on the other side of the first plate 111, the first plate 111 is connected to the third structure 30, and the first limiting member 112 is in limiting fit with one side of the elastic portion 40; the second supporting portion 21 includes a second plate 211 and a second limiting member 212 disposed on one side of the second plate 211, the second trabecular bone layer 22 is disposed on the other side of the second plate 211, the second plate 211 is connected to the third structure 30, and the second limiting member 212 is in limiting fit with the other side of the elastic portion 40. The first trabecular bone layer 12 can be supported by the first plate 111, and the first stopper 112 can be connected to the elastic portion 40 to limit the elastic portion 40. Accordingly, the second trabecular bone layer 22 can be supported by the second plate body 211, and the elastic portion 40 can be connected and limited by the second limiting member 212.
Further, the first limiting member 112 has a first limiting groove, the second limiting member 212 has a second limiting groove, the first limiting member 112 and the second limiting member 212 are disposed at an interval, and the elastic portion 40 is disposed between the first limiting groove and the second limiting groove. Can reliably be spacing elastic component 40 through first spacing groove and second spacing groove, prevent that elastic component 40 from deviating from. The first limiting member 112 and the second limiting member 212 are disposed at an interval, so that the bracket is elastically deformed. Specifically, the surface of elastic part 40 is the arcwall face, and first spacing groove and second spacing groove are the arc recess, and the shape of first spacing groove and second spacing groove matches with elastic part 40's surface, can increase area of contact like this, improves the stability of connecting.
As shown in fig. 5, the first supporting portion 11 further includes a first fixing member 113, the first fixing member 113 is disposed at an end of the first plate 111 away from the third structure 30, the first fixing member 113 protrudes from the first trabecular bone layer 12, and the first fixing member 113 is configured to be connected to a vertebral body structure of a person; the second supporting portion 21 further includes a second fixing member 213, the second fixing member 213 is disposed at an end of the second plate 211 away from the third structure 30, the second fixing member 213 protrudes from the second trabecular bone layer 22, and the second fixing member 213 is used for connecting with a vertebral body structure of a person. The first fixing member 113 and the second fixing member 213 can be reliably connected with the vertebral body structure of the person and can play a role in limiting.
In this embodiment, the stent is an integrally formed structure made by 3D printing, and the stent is made of nitinol. The nickel-titanium alloy material has good memory performance, so that the stent is convenient to deform, and is convenient to implant. Set up the support into integrated into one piece structure, can improve the overall structure intensity of support and intervertebral disc prosthesis's long-term stability on the one hand, on the other hand can reduce intervertebral disc prosthesis's spare part quantity, reduces the assembly step to can make things convenient for the doctor to use with intervertebral disc prosthesis whole implantation, improve operation quality and efficiency.
Furthermore, the intervertebral disc prosthesis is of an integral structure, has high connection strength and good stability, avoids the problems that the intervertebral disc prosthesis adopting a plurality of components needs to be assembled and combined and the components are easy to separate, and is convenient for the operation of doctors.
In the present embodiment, the elastic portion 40 is made of a polymer material. The elastic part 40 is made of polymer material, and has good ductility, breaking strength, wear resistance and biocompatibility, so that the elastic part can be well combined with the stent, and the overall performance of the long-term implantation of the prosthesis is ensured.
Specifically, the elastic part 40 may be made of polyurethane, polyvinyl alcohol gel, or polylactic acid material by injection molding. The material has good stability, and the deformability and the strength of the material meet the long-term use requirements. Further, the elastic portion 40 may be made of a polyurethane TPU material. These materials have good ductility, breaking strength, wear resistance and biocompatibility, so that the material can be well combined with a stent to ensure the overall performance of the long-term implantation of the prosthesis.
As shown in fig. 3 to 5, the elastic portion 40 has an ellipsoidal structure, the third structure 30 has a plate-like structure, and the longitudinal direction of the elastic portion 40 is arranged along the longitudinal direction of the third structure 30. Through the arrangement, the intervertebral disc prosthesis can be elastically deformed conveniently, so that the requirement of human motion is met. Moreover, the elastic part 40 has an ellipsoidal structure, so that the distribution of the acting force is relatively uniform. After the intervertebral disc prosthesis is implanted, the opening between the first structure 10 and the second structure 20 faces forwards, and because the deformation capacity of the side with the opening is larger, the requirement that the forward bending amplitude of the lumbar vertebra of a human body is larger is met.
In this embodiment, the intervertebral disc prosthesis further comprises: and a silicone rubber cover 50 filled in the cavity between the first structure 10, the second structure 20, the third structure 30 and the elastic part 40. This can serve as protection and occupancy. The silicone sleeve 50 may be filled on the left and right sides of the first and second stoppers 112 and 212 in fig. 8, and may wrap the elastic portion 40.
The technical scheme has the following characteristics and advantages: the intervertebral disc prosthesis is of an integral structure, has no risk of separating each component, is convenient to implant and is simple to operate; the scheme can provide the extension area movement in the front-back direction without pursuing the axial rotation capacity of the cervical intervertebral disc, thereby being suitable for the movement characteristics of the thoracolumbar, and being beneficial to ensuring the good stability of the prosthesis; the stent part is made of memory alloy, in particular TINI memory alloy, the alloy HAs excellent biocompatibility, elasticity and large deformability, the surface can increase the bioactivity by increasing an HA coating, and the corrosion resistance can also be reduced by a surface modification technology; the bracket is integrally manufactured in a 3D printing TINI memory alloy mode; the support is provided with a thin rear wall, can provide buckling deformation and can deform under the stress environment of stress activity, so that the flexion and extension movement of the lumbar vertebra is realized; when the prosthesis is implanted, the prosthesis with a proper opening angle is selected, the front end is compressed by an implantation tool to form deformation, the prosthesis is naturally expanded after being implanted, and meanwhile, the prosthesis can be restored to the preset angle of the prosthesis required by a human body pathological change part due to the function of restoring the original state of the memory alloy; the elastic part is made of polymer materials (such as polyurethane, polyvinyl alcohol gel and polylactic acid) with similar hardness and elasticity with natural physiological cartilage of a human body, particularly polyurethane TPU materials, and the polymer can deform under the stress environment of stress activity, so that the flexion and extension movement of the lumbar vertebra is realized; the front chamber and the rear chamber of the metal support are filled and wrapped by the elastic part through the silica gel sleeve, so that the functions of protection and occupation are achieved.
The utility model discloses utilize memory alloy deformation recoverable ability to solve the problem that traditional intervertebral disc is difficult to implant, central polymer elasticity portion have solved how the system warp under stress environment and have reached the problem of basic motion function. The technical scheme is convenient for operation, and can solve the problems that the traditional intervertebral disc prosthesis is difficult to achieve biological fixation, the multiple components of the prosthesis are easy to generate structural failure, the friction surface is wear-resistant, and the motion amplitude is not well controlled, the problem that the intervertebral disc prosthesis in the prior art is easy to dislocate, and the components in the intervertebral disc prosthesis adopting the combination of a plurality of components are easy to separate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. An intervertebral disc prosthesis, comprising:
the stent is made of memory alloy and comprises a first structure (10), a second structure (20) and a third structure (30) which are connected in sequence, wherein two ends of the third structure (30) are respectively connected with the first structure (10) and the second structure (20), the first structure (10) and the second structure (20) are arranged at intervals, and an opening is formed between the first structure (10) and the second structure (20);
the stent has a constrained state and a natural state, and the opening size of the stent in the constrained state is smaller than the opening size of the stent in the natural state;
an elastic part (40) disposed between the first structure (10) and the second structure (20), one side of the elastic part (40) being connected to the first structure (10), the other side of the elastic part (40) being connected to the second structure (20).
2. Intervertebral disc prosthesis according to claim 1,
the first structure (10) comprises a first support (11) and a first trabecular bone layer (12) arranged on the first support (11), and the first support (11) is connected with the third structure (30);
the second structure (20) comprises a second support (21) and a second trabecular bone layer (22) arranged on the second support (21), the second support (21) being connected to the third structure (30), the elastic portion (40) being arranged between the first support (11) and the second support (21).
3. Intervertebral disc prosthesis according to claim 2, characterized in that the first bone trabecular layer (12) and the second bone trabecular layer (22) are each of a porous structure.
4. Intervertebral disc prosthesis according to claim 2,
the first supporting part (11) comprises a first plate body (111) and a first limiting part (112) arranged on one side of the first plate body (111), the first bone trabecula layer (12) is arranged on the other side of the first plate body (111), the first plate body (111) is connected with the third structure (30), and the first limiting part (112) is in limiting fit with one side of the elastic part (40);
the second supporting portion (21) comprises a second plate body (211) and a second limiting part (212) arranged on one side of the second plate body (211), the second bone trabecula layer (22) is arranged on the other side of the second plate body (211), the second plate body (211) is connected with the third structure (30), and the second limiting part (212) is in limiting fit with the other side of the elastic portion (40).
5. Intervertebral disc prosthesis according to claim 4, characterized in that the first retaining element (112) has a first retaining groove and the second retaining element (212) has a second retaining groove, the first retaining element (112) being arranged at a distance from the second retaining element (212), the resilient part (40) being arranged between the first retaining groove and the second retaining groove.
6. Intervertebral disc prosthesis according to claim 4,
the first supporting part (11) further comprises a first fixing part (113), the first fixing part (113) is arranged at one end, far away from the third structure (30), of the first plate body (111), the first fixing part (113) protrudes out of the first trabecular bone layer (12), and the first fixing part (113) is used for being connected with a vertebral body structure of a person;
the second supporting portion (21) further comprises a second fixing piece (213), the second fixing piece (213) is arranged at one end, far away from the third structure (30), of the second plate body (211), the second fixing piece (213) protrudes out of the second trabecular bone layer (22), and the second fixing piece (213) is used for being connected with a vertebral body structure of a person.
7. Intervertebral disc prosthesis according to claim 1, wherein the stent is an integrally formed structure made by 3D printing, the stent being made of nitinol.
8. Intervertebral disc prosthesis according to any of claims 1 to 7, characterized in that the elastic part (40) is made of a polymer material.
9. Intervertebral disc prosthesis according to claim 8, characterized in that the elastic part (40) is made of polyurethane, polyvinyl alcohol gel or polylactic acid material by means of injection moulding.
10. Intervertebral disc prosthesis according to claim 1, characterised in that the flexible part (40) is of an ellipsoidal configuration and the third configuration (30) is of a plate-like configuration, the length direction of the flexible part (40) being arranged along the length direction of the third configuration (30).
11. Intervertebral disc prosthesis according to any of claims 1 to 7, further comprising:
a silicone rubber sleeve (50) filled in a cavity between the first structure (10), the second structure (20), the third structure (30) and the elastic part (40).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921259953.4U CN211131558U (en) | 2019-08-05 | 2019-08-05 | Intervertebral disc prosthesis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921259953.4U CN211131558U (en) | 2019-08-05 | 2019-08-05 | Intervertebral disc prosthesis |
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| CN211131558U true CN211131558U (en) | 2020-07-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110368149A (en) * | 2019-08-05 | 2019-10-25 | 北京爱康宜诚医疗器材有限公司 | Intervertebral disk prosthesis |
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2019
- 2019-08-05 CN CN201921259953.4U patent/CN211131558U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110368149A (en) * | 2019-08-05 | 2019-10-25 | 北京爱康宜诚医疗器材有限公司 | Intervertebral disk prosthesis |
| CN110368149B (en) * | 2019-08-05 | 2024-03-15 | 北京爱康宜诚医疗器材有限公司 | Intervertebral disc prosthesis |
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