Intervertebral prosthesis

Abstract

The present invention provides an intervertebral prosthesis, comprising: a first support plate; a second support plate, arranged opposite to the first support plate and located below the first support plate; a pushing structure, arranged between the first support plate and the second support plate, the pushing structure comprising a first pushing member and a second pushing member; a driving member, the driving member driving the first pushing member and the second pushing member to move closer to each other or away from each other; when the first pushing member and the second pushing member move closer to each other, the first pushing member and the first support plate and the second support plate both abut against each other, and the second pushing member and the first support plate and the second support plate both abut against each other, so as to increase the distance between the first support plate and the second support plate; wherein the first support plate comprises a supporting frame and a porous structure connected to the supporting frame, the porous structure comprising a plurality of connecting holes connecting the upper and lower surfaces of the first support plate. The technical solution of the present application effectively solves the problem that the use and operation of the intervertebral prosthesis in the related art is relatively troublesome.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to an intervertebral prosthesis. Background Art

[0002] Degenerative disc disease is a common orthopedic disease. Modern medicine has already matured the use of intervertebral prosthesis implantation to treat degenerative disc disease. The intervertebral prosthesis is implanted into the intervertebral space to support the intervertebral space.

[0003] The intervertebral prosthesis in the related art is an integrated prosthesis, and the height of the intervertebral prosthesis is a fixed value. Therefore, it is necessary to measure the height of the intervertebral space before or during the operation, and then put the intervertebral prosthesis of the corresponding height into the intervertebral space. Since the height of the intervertebral prosthesis is fixed, when the intervertebral prosthesis is implanted, the intervertebral space needs to be expanded first, and then implanted into the intervertebral space by hitting, which makes the use and operation of the intervertebral prosthesis more troublesome and easy to damage the vertebral body. Summary of the invention

[0004] The main purpose of the present invention is to provide an intervertebral prosthesis to solve the problem that the intervertebral prosthesis in the related art is complicated to use and operate.

[0005] In order to achieve the above-mentioned objectives, the present invention provides an intervertebral prosthesis, comprising: a first support plate; a second support plate, arranged opposite to the first support plate and located below the first support plate; a pushing structure, arranged between the first support plate and the second support plate, the pushing structure comprising a first pushing member and a second pushing member; a driving member, connected between the first pushing member and the second pushing member, the driving member driving the first pushing member and the second pushing member to move closer to or away from each other; when the first pushing member and the second pushing member approach each other, the first pushing member and the first support plate and the second support plate both abut against each other, and the second pushing member and the first support plate and the second support plate both abut against each other, so as to increase the distance between the first support plate and the second support plate; wherein the first support plate comprises a support frame and a porous structure connected to the support frame, the porous structure comprising a plurality of connecting holes connecting the upper and lower surfaces of the first support plate.

[0006] Furthermore, the support frame includes a frame body, a plurality of first protrusions and a plurality of second protrusions respectively arranged on opposite sides of the frame body, and a plurality of reinforcing beams connected between the first protrusions and the second protrusions, the plurality of first protrusions correspond one-to-one to the plurality of second protrusions, the porous structure includes a porous base layer and a plurality of third protrusions arranged on the porous base layer, each third protrusion is located between the corresponding first protrusion and the second protrusion, and is located below the corresponding reinforcing beam.

[0007] Further, the plurality of first protrusions, the plurality of second protrusions, the plurality of third protrusions and the plurality of reinforcing beams form a toothed structure.

[0008] Furthermore, a slide groove is provided on the first pushing member, and a slider located in the slide groove is provided on the first supporting plate; when the distance between the first supporting plate and the second supporting plate changes, the slider slides and cooperates with the slide groove; the first pushing member is located at one end of the first supporting plate, and the opening of the slide groove is arranged toward the first supporting plate, and the first pushing member is also provided with an anti-slip protrusion located on the side wall of the slide groove; an anti-slip groove is provided on the slider, and the anti-slip protrusion is movably arranged in the anti-slip groove and cooperates with the anti-slip groove to prevent slipping.

[0009] Furthermore, the first pushing member includes a pushing block and a connecting shaft connected to the pushing block, the connecting shaft is clamped between the first support plate and the second support plate, the pushing block abuts between the first end of the first support plate and the first end of the second support plate, and there is a placement gap between the connecting shaft and the porous structure.

[0010] Furthermore, the first pushing member includes a pushing block and a connecting shaft connected to the pushing block, the connecting shaft is clamped between the first support plate and the second support plate, the pushing block abuts between the first end of the first support plate and the first end of the second support plate, and the second pushing member abuts between the second end of the first support plate and the second end of the second support plate; the driving member is a driving screw, the screw head of the driving screw is rotatably connected to the second pushing member, and a threaded hole matching the screw rod of the driving screw is provided on the connecting shaft, and the screw rod passes through the second pushing member and extends into the threaded hole; the intervertebral prosthesis also includes a limiting opening ring arranged between the second pushing member and the screw head, a countersunk hole for accommodating the screw head is provided on the second pushing member, a first limiting ring groove is provided on the side wall of the countersunk hole, and a second limiting ring groove is provided on the screw head, the limiting opening ring has a deformed opening, and the limiting opening ring is limitedly arranged in the first limiting ring groove and the second limiting ring groove.

[0011] Furthermore, the first pushing member includes a pushing block and a connecting shaft connected to the pushing block, the connecting shaft is clamped between the first support plate and the second support plate, the pushing block abuts between the first end of the first support plate and the first end of the second support plate, and the second pushing member abuts between the second end of the first support plate and the second end of the second support plate; a guide protrusion is provided on the connecting shaft, and a guide slideway that can cooperate with the guide protrusion is provided on the first support plate, and the guide slideway passes through the upper and lower surfaces of the first support plate; when the distance between the first support plate and the second support plate is the smallest, one end of the guide protrusion protrudes or is flush with the upper surface of the first support plate.

[0012] Furthermore, the guide protrusion includes a guide section and a reinforcing rib connected between the guide section and the connecting shaft.

[0013] Furthermore, the first pushing member includes a pushing block and a connecting shaft connected to the pushing block, the connecting shaft is clamped between the first support plate and the second support plate, the pushing block abuts between the first end of the first support plate and the first end of the second support plate, and the second pushing member abuts between the second end of the first support plate and the second end of the second support plate; the end of the pushing block facing away from the second pushing member is provided with a first inclined surface, a second inclined surface and a transition surface connecting the first inclined surface and the second inclined surface; the first inclined surface and the second inclined surface are arranged at an angle, and the distance between the first inclined surface and the second inclined surface gradually decreases in the direction from approaching the second pushing member to moving away from the second pushing member.

[0014] Furthermore, the angle formed between the first inclined surface and the second inclined surface is greater than or equal to 100 degrees and less than or equal to 120 degrees; and / or, the transition surface includes a plane segment and a first arc surface segment and a second arc surface segment respectively connected to two opposite ends of the plane segment, the first arc surface segment is connected to the first inclined surface, and the second arc surface segment is connected to the second inclined surface.

[0015] The technical solution of the present invention is applied, and the intervertebral prosthesis includes: a first support plate, a second support plate, a pushing structure and a driving member. The second support plate is arranged opposite to the first support plate and is located below the first support plate. The pushing structure is arranged between the first support plate and the second support plate, and the pushing structure includes a first pushing member and a second pushing member. The driving member is connected between the first pushing member and the second pushing member, and the driving member drives the first pushing member and the second pushing member to approach each other or move away from each other. When the first pushing member and the second pushing member approach each other, the first pushing member and the first support plate and the second support plate are both butted against each other, and the second pushing member and the first support plate and the second support plate are both butted against each other, so that the distance between the first support plate and the second support plate is increased. Among them, the first support plate includes a support frame and a porous structure connected to the support frame, and the porous structure includes a plurality of connecting holes connecting the upper and lower surfaces of the first support plate. In this way, the distance between the first support plate and the second support plate is kept small first, so that the intervertebral prosthesis can be placed in the intervertebral body space, and then the distance between the first support plate and the second support plate can be increased by driving the driving member, so that the height of the intervertebral prosthesis can be increased, and the implantation is completed. The solution of the present application avoids the need to place the intervertebral prosthesis into the intervertebral space by striking in the related art, simplifies the use of the intervertebral prosthesis, and makes the use of the intervertebral prosthesis easier. Therefore, the technical solution of the present application effectively solves the problem that the use of the intervertebral prosthesis in the related art is relatively troublesome. In addition, by setting up the porous structure, after the intervertebral prosthesis is placed in the intervertebral space, the autologous bone can be connected to the first support plate by bone growth into the porous structure, making the connection between the first support plate and the autologous bone more stable and reliable, thereby improving the reliability of the intervertebral prosthesis during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of an intervertebral prosthesis according to the present invention is shown;

[0018] Figure 2 Shows Figure 1 Schematic diagram of the exploded structure of the intervertebral prosthesis;

[0019] Figure 3 Shows Figure 1 A schematic diagram of the three-dimensional structure of the slide groove of the intervertebral prosthesis;

[0020] Figure 4 Shows Figure 1 A schematic diagram of the three-dimensional structure of the intervertebral prosthesis without showing the first support plate;

[0021] Figure 5 Shows Figure 1 A schematic diagram of the three-dimensional structure of the intervertebral prosthesis without showing the second support plate;

[0022] Figure 6 Shows Figure 1 A schematic cross-sectional view of a limiting opening ring of an intervertebral prosthesis;

[0023] Figure 7 Shows Figure 1 A schematic diagram of the three-dimensional structure of the intervertebral prosthesis from another perspective;

[0024] Figure 8 Shows Figure 1 Schematic diagram of the three-dimensional structure of the first pushing member of the intervertebral prosthesis.

[0025] The above drawings include the following reference numerals:

[0026] 10. first support plate; 11. support frame; 112. first protrusion; 113. second protrusion; 114. reinforcing beam; 12. porous structure; 121. porous base layer; 122. third protrusion; 13. slider; 14. anti-slip groove; 15. guide slide;

[0027] 20. A second supporting plate;

[0028] 30. First pusher; 31. Pusher block; 311. First inclined surface; 312. Second inclined surface; 313. Transition surface; 3131. First arc surface segment; 3132. Second arc surface segment; 3133. Plane segment; 32. Connecting shaft; 34. Guide protrusion; 341. Guide segment; 342. Reinforcement rib; 35. Slide groove; 351. Anti-slip protrusion; 36. First limiting ring groove;

[0029] 40. A second pusher;

[0030] 50, driving member; 51, screw head; 511, second limiting ring groove; 52, screw rod;

[0031] 60. Limit opening ring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0035] like Figures 1 to 3 As shown, in the technical solution of this embodiment, the intervertebral prosthesis includes: a first support plate 10, a second support plate 20, a pushing structure and a driving member 50. The second support plate 20 is arranged opposite to the first support plate 10 and is located below the first support plate 10. The pushing structure is arranged between the first support plate 10 and the second support plate 20, and the pushing structure includes a first pushing member 30 and a second pushing member 40. The driving member 50 is connected between the first pushing member 30 and the second pushing member 40, and the driving member 50 drives the first pushing member 30 and the second pushing member 40 to move closer to each other or away from each other. When the first pushing member 30 and the second pushing member 40 are close to each other, the first pushing member 30 and the first support plate 10 and the second support plate 20 are both pressed against each other, and the second pushing member 40 and the first support plate 10 and the second support plate 20 are both pressed against each other, so that the distance between the first support plate 10 and the second support plate 20 is increased. Among them, the first support plate 10 includes a support frame 11 and a porous structure 12 connected to the support frame 11, and the porous structure 12 includes a plurality of connecting holes connecting the upper and lower surfaces of the first support plate 10.

[0036] By applying the technical solution of this embodiment, a small distance is first maintained between the first support plate 10 and the second support plate 20 so that the intervertebral prosthesis can be placed in the intervertebral space, and then the distance between the first support plate 10 and the second support plate 20 can be increased by driving the driving member 50, so that the height of the intervertebral prosthesis can be increased to complete the implantation. The solution of this embodiment avoids the operation of placing the intervertebral prosthesis into the intervertebral space by hitting in the related art, simplifies the use operation of the intervertebral prosthesis, and makes the use of the intervertebral prosthesis easier. Therefore, the technical solution of this embodiment effectively solves the problem that the use operation of the intervertebral prosthesis in the related art is relatively troublesome. In addition, by setting the porous structure 12, after the intervertebral prosthesis is placed in the intervertebral space, the autologous bone can be connected to the first support plate 10 by bone growth into the porous structure 12, so that the connection between the first support plate 10 and the autologous bone is more stable and reliable, thereby improving the reliability of the intervertebral prosthesis during long-term use.

[0037] In this embodiment, the porous structure 12 is a trabecular structure, which has a rough surface similar to a cancellous bone structure, so that the osteocytes and microvessels of the autologous bone can grow into the multiple interconnected pores of the trabecular structure. The porosity of the trabecular structure is 300 μm to 500 μm.

[0038] It should be noted that the side of the first support plate 10 facing away from the second support plate 20 is the upper side of the first support plate 10 , and the side of the first support plate 10 facing the second support plate 20 is the lower side of the first support plate 10 .

[0039] like Figures 1 to 3 as well as Figure 7As shown, the support frame 11 includes a frame body, a plurality of first protrusions 112 and a plurality of second protrusions 113 respectively arranged on opposite sides of the frame body, and a plurality of reinforcing beams 114 connected between the first protrusions 112 and the second protrusions 113. The plurality of first protrusions 112 correspond to the plurality of second protrusions 113 one by one. The porous structure 12 includes a porous base layer 121 and a plurality of third protrusions 122 arranged on the porous base layer 121, each third protrusion 122 is located between the corresponding first protrusion 112 and the second protrusion 113, and is located below the corresponding reinforcing beam 114. The setting of the frame body can better support the intervertebral space and improve the structural strength of the intervertebral prosthesis. The first protrusion 112 and the second protrusion 113 can connect and support the reinforcing beam 114, so that the setting of the reinforcing beam 114 is more stable. The reinforcing beam 114 can support the intervertebral space, further making the structural strength of the intervertebral prosthesis more reliable. The third protrusion 122 of the porous structure 12 can facilitate the ingrowth of autologous bone while the reinforcing beam 114 supports the intervertebral space. Thus, through the above arrangement, the intervertebral prosthesis can ensure the structural strength of the intervertebral prosthesis while cooperating with the ingrowth of autologous bone. The arrangement of the reinforcing beam 114 ensures the reliability of the first support plate 10 in supporting the intervertebral space. In addition, the intervertebral prosthesis has a better elastic modulus.

[0040] like Figures 1 to 3 as well as Figure 7 As shown, a plurality of first protrusions 112, a plurality of second protrusions 113, a plurality of third protrusions 122 and a plurality of reinforcing beams 114 form a tooth-shaped structure. The tooth-shaped structure increases the contact area between the intervertebral prosthesis and the autologous bone, and reduces the possibility of relative sliding between the intervertebral prosthesis and the autologous bone, so that the intervertebral prosthesis can be more stably and reliably arranged in the intervertebral space.

[0041] In this embodiment, the tooth-shaped structure is a wave-shaped tooth-shaped structure. The first support plate 10 is a combination of a solid structure and a porous structure 12 , and the top of each wave-shaped tooth-shaped structure adopts a solid edge sealing design to ensure the strength of the porous structure 12 .

[0042] like Figures 1 to 8As shown, a slide groove 35 is provided on the first push member 30, and a slider 13 located in the slide groove 35 is provided on the first support plate 10. When the distance between the first support plate 10 and the second support plate 20 changes, the slider 13 slides and cooperates with the slide groove 35. The arrangement of the slide groove 35 and the slider 13 enables the first push member 30 to better abut against the first support plate 10 to push the first support plate 10 to move in a direction away from the second support plate 20, so that the movement of the first support plate 10 is more stable and reliable. The first push member 30 is located at one end of the first support plate 10, and the opening of the slide groove 35 is arranged toward the first support plate 10. The first push member 30 is also provided with an anti-slip protrusion 351 located on the groove side wall of the slide groove 35. The slider 13 is provided with an anti-slip groove 14, and the anti-slip protrusion 351 is movably arranged in the anti-slip groove 14 and cooperates with the anti-slip groove 14 to prevent slipping. The arrangement of the anti-slip protrusion 351 and the anti-slip groove 14 enables the anti-slip protrusion 351 to hook with the anti-slip groove 14 when the slider 13 slides in the slide groove 35, so that the first pusher 30 and the first support plate 10 can be better fitted, avoiding the problem of the slider 13 being separated from the slide groove 35, so that the slider 13 can slide in the slide groove 35 more reliably, reducing the problem of the first pusher 30 being separated from the first support plate 10, and realizing the self-locking of the first pusher 30 and the first support plate 10. The above arrangement increases the contact surface between the first pusher 30 and the first support plate 10, increases the friction between the first pusher 30 and the first support plate 10, and increases the separation force between the first pusher 30 and the first support plate 10, which plays a role in better structural and mechanical performance and coordination. When the distance between the first support plate 10 and the second support plate 20 is the largest, the first support plate 10 and the first pusher 30 can also be reliably connected.

[0043] like Figures 1 to 8 As shown, the first pusher 30 includes a push block 31 and a connecting shaft 32 connected to the push block 31, and the connecting shaft 32 is sandwiched between the first support plate 10 and the second support plate 20. The push block 31 abuts between the first end of the first support plate 10 and the first end of the second support plate 20. The push block 31 and the connecting shaft 32 have a simple structure and are easy to process. There is a placement gap between the connecting shaft 32 and the porous structure 12. The placement gap is convenient for placing bone grafts or anti-infective drugs. The anti-infective drugs in the placement gap can be transported to the upper surface of the first support plate 10 through the porous structure 12, so that the anti-infective drugs can contact the autologous bone to achieve the effect of drug administration. After the autologous bone grows into the porous structure 12, the autologous bone can continue to grow and combine with the bone graft in the placement gap, further making the connection between the autologous bone and the intervertebral prosthesis more reliable.

[0044] In this embodiment, the angle between the extension direction of the slide groove 35 and the center line of the connecting shaft 32 is 50 degrees. When the distance between the first support plate 10 and the second support plate 20 is the smallest, the placement gap between the connecting shaft 32 and the porous structure 12 is 2 mm. When the distance between the first support plate 10 and the second support plate 20 is the largest, the placement gap between the connecting shaft 32 and the porous structure 12 is 4 mm.

[0045] like Figures 1 to 7 As shown, the first pusher 30 includes a push block 31 and a connecting shaft 32 connected to the push block 31, and the connecting shaft 32 is sandwiched between the first support plate 10 and the second support plate 20. The push block 31 abuts between the first end of the first support plate 10 and the first end of the second support plate 20. The second pusher 40 abuts between the second end of the first support plate 10 and the second end of the second support plate 20. The push block 31 and the connecting shaft 32 have simple structures and are easy to process. The driving member 50 is a driving screw, and the screw head 51 of the driving screw is rotatably connected to the second pusher 40. A threaded hole is provided on the connecting shaft 32 to cooperate with the screw rod 52 of the driving screw, and the screw rod 52 passes through the second pusher 40 and extends into the threaded hole. In this way, the distance between the second pusher 40 and the first pusher 30 can be adjusted by rotating the screw rod 52, which is simple to operate and easy to process. The intervertebral prosthesis also includes a limit opening ring 60 arranged between the second pusher 40 and the screw head 51. The second pusher 40 is provided with a countersunk hole for accommodating the screw head 51, and the side wall of the countersunk hole is provided with a first limiting ring groove 36. The screw head 51 is provided with a second limiting ring groove 511, and the limiting opening ring 60 has a deformed opening. The limiting opening ring 60 is limitedly arranged in the first limiting ring groove 36 and the second limiting ring groove 511. In this way, by the arrangement of the limiting opening ring 60, the screw head 51 can be rotatably arranged on the second pusher 40, and the screw head 51 will not fall off from the second pusher 40 when rotating. The arrangement of the deformed opening facilitates the placement of the limiting opening ring 60 into the first limiting ring groove 36 and the second limiting ring groove 511.

[0046] In this embodiment, the position-limiting opening ring 60 is first sleeved in the second position-limiting ring groove 511 on the screw head 51, and then the position-limiting opening ring 60 is pressed to deform the deformed opening so as to reduce the diameter of the position-limiting opening ring 60. Then, the position-limiting opening ring 60 and the screw head 51 are placed in the countersunk hole of the second pusher 40 so that the position-limiting opening ring 60 is located in the first position-limiting ring groove 36, and the position-limiting opening is restored to the initial state so that the diameter of the position-limiting opening ring 60 is increased so that the position-limiting opening ring 60 can be limitedly set in the first position-limiting ring groove 36 and the second position-limiting ring groove 511.

[0047] In this embodiment, a clamping structure is also provided on the second pushing member 40 to facilitate the connection between the tool and the intervertebral prosthesis.

[0048] like Figures 1 to 8 As shown, the first pusher 30 includes a push block 31 and a connecting shaft 32 connected to the push block 31, and the connecting shaft 32 is sandwiched between the first support plate 10 and the second support plate 20. The push block 31 abuts between the first end of the first support plate 10 and the first end of the second support plate 20. The second pusher 40 abuts between the second end of the first support plate 10 and the second end of the second support plate 20. The push block 31 and the connecting shaft 32 have simple structures and are easy to process. A guide protrusion 34 is provided on the connecting shaft 32, and a guide slide 15 capable of guiding and cooperating with the guide protrusion 34 is provided on the first support plate 10. The setting of the guide protrusion 34 and the guide slide 15 can guide the movement of the first support plate 10 so that the first support plate 10 can move smoothly along a preset direction. The guide slide 15 runs through the upper and lower surfaces of the first support plate 10. When the distance between the first support plate 10 and the second support plate 20 is the smallest, one end of the guide protrusion 34 protrudes or is flush with the upper surface of the first support plate 10. In this way, the minimum height of the intervertebral prosthesis can be effectively reduced, making the structure of the intervertebral prosthesis more compact. Lowering the initial height of the intervertebral prosthesis can facilitate the operation of placing the intervertebral prosthesis into the intervertebral space, avoid the operation of expanding the intervertebral space, reduce damage to the autologous bone, and further simplify the use of the intervertebral prosthesis. The first support plate 10 and the second support plate 20 can be better buckled.

[0049] In this embodiment, the minimum distance between the first support plate 10 and the second support plate 20 is 7 mm, and the maximum distance between the first support plate 10 and the second support plate 20 is 14 mm. One end of the guide protrusion 34 is flush with the upper surface of the first support plate 10. Preferably, one end of the guide protrusion 34 is flush with the upper surface of the reinforcing beam 114.

[0050] like Figures 1 to 8 As shown, the guide protrusion 34 includes a guide section 341 and a reinforcing rib 342 connected between the guide section 341 and the connecting shaft 32. The provision of the reinforcing rib 342 improves the structural strength of the guide protrusion 34, making the guiding function of the guide protrusion 34 more reliable. In this embodiment, the reinforcing rib 342 is a triangular reinforcing support structure, which can provide better support and mechanical properties for the guide protrusion 34, and ensure the overall mechanical properties of the intervertebral prosthesis after expansion.

[0051] like Figures 1 to 8As shown, the first pusher 30 includes a push block 31 and a connecting shaft 32 connected to the push block 31, and the connecting shaft 32 is sandwiched between the first support plate 10 and the second support plate 20. The push block 31 abuts between the first end of the first support plate 10 and the first end of the second support plate 20, and the second pusher 40 abuts between the second end of the first support plate 10 and the second end of the second support plate 20. The push block 31 and the connecting shaft 32 have a simple structure and are easy to process. The end of the push block 31 away from the second pusher 40 is provided with a first inclined surface 311, a second inclined surface 312 and a transition surface 313 connecting the first inclined surface 311 and the second inclined surface 312. The first inclined surface 311 and the second inclined surface 312 are arranged at an angle, and the distance between the first inclined surface 311 and the second inclined surface 312 gradually decreases in the direction from approaching the second pusher 40 to away from the second pusher 40. The first inclined surface 311 and the second inclined surface 312 are provided to facilitate the operation of placing the intervertebral prosthesis into the intervertebral space, and reduce the diameter of the outer end of the push block 31, so that the push block 31 can more conveniently enter the intervertebral space, which is convenient for operation. The transition surface 313 is provided to connect the first inclined surface 311 and the second inclined surface 312, reducing the damage to the autologous bone at the connection between the first inclined surface 311 and the second inclined surface 312.

[0052] like Figures 1 to 8 As shown, the angle formed between the first inclined surface 311 and the second inclined surface 312 is greater than or equal to 100 degrees and less than or equal to 120 degrees, so as to further reduce the damage to the autogenous bone at the connection between the first inclined surface 311 and the second inclined surface 312. The transition surface 313 includes a plane section 3133 and a first arc surface section 3131 and a second arc surface section 3132 respectively connected to the two opposite ends of the plane section 3133, the first arc surface section 3131 is connected to the first inclined surface 311, and the second arc surface section 3132 is connected to the second inclined surface 312. The setting of the plane section 3133 reduces the possibility that the transition surface 313 protrudes from the side of the vertebral body, and the setting of the plane section 3133 further reduces the damage to the autogenous bone in the intervertebral space. The arrangement of the first arc segment 3131 and the second arc segment 3132 can better connect the plane segment 3133 and the first inclined surface 311 and the second inclined surface 312, reduce the edges and corners on the surface of the pushing block 31, and further reduce the damage to the autologous bone in the intervertebral space.

[0053] In other embodiments, the angle formed between the first inclined surface 311 and the second inclined surface 312 is greater than or equal to 100 degrees and less than or equal to 120 degrees. Alternatively, the transition surface 313 includes a plane segment 3133 and a first arc segment 3131 and a second arc segment 3132 respectively connected to two opposite ends of the plane segment 3133, the first arc segment 3131 is connected to the first inclined surface 311, and the second arc segment 3132 is connected to the second inclined surface 312.

[0054] In this embodiment, the structures of the first support plate 10 and the second support plate 20 are mirror-symmetrical, and the first support plate 10 and the second support plate 20 are both manufactured using a 3D printing process. The connecting shaft 32 is made of titanium alloy material to reduce the weight of the intervertebral prosthesis. The slider 13 and the slide groove 35 are both in an up-down mirror layout, and the front and rear slide rails are in a bidirectional array layout. The slider 13 and the slide groove 35 are both bidirectional arrays that are mirrored left and right and then mirrored up and down. The adjustable distance between the first pusher 30 and the second pusher 40 is 3 mm.

[0055] In this embodiment, the intervertebral prosthesis uses laser or high-energy electron beam rapid prototyping technology, high-temperature sintering, chemical corrosion, electrochemical deposition and other technologies, and other processing methods include precision casting, welding, mechanical cutting, electric discharge machining and the like; the hydroxyapatite coating is obtained by high-temperature spraying or electrochemical deposition. The intervertebral prosthesis is made of medical metals, including but not limited to titanium and titanium alloys, cobalt alloys, stainless steel, tantalum metal, magnesium alloys, and peek materials.

[0056] In this embodiment, the first support plate 10 adopts an asymmetric design, an arc-shaped anatomical design of the first support plate 10, and load-bearing slide grooves 35 are designed at the front and rear parts of the first support plate 10. Four slide grooves 35 are arranged on the first support plate 10, and two mirror-distributed 50-degree slide grooves 35 are arranged on both sides of the first support plate 10, and a porous structure 12 is adopted in the middle part to achieve bone integration and a structural design form with an adjustment function.

[0057] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0058] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0059] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intervertebral prosthesis, characterized in that: include: A first support plate (10); a second support plate (20), arranged opposite to the first support plate (10) and located below the first support plate (10); A pushing structure, arranged between the first supporting plate (10) and the second supporting plate (20), the pushing structure comprising a first pushing member (30) and a second pushing member (40); a driving member (50) connected between the first pushing member (30) and the second pushing member (40), the driving member (50) driving the first pushing member (30) and the second pushing member (40) to move closer to each other or farther away from each other; when the first pushing member (30) and the second pushing member (40) move closer to each other, the first pushing member (30) and the first supporting plate (10) and the second supporting plate (20) are both butted against each other, and the second pushing member (40) and the first supporting plate (10) and the second supporting plate (20) are both butted against each other, so that the distance between the first supporting plate (10) and the second supporting plate (20) is increased; The first support plate (10) comprises a support frame (11) and a porous structure (12) connected to the support frame (11), the porous structure (12) comprising a plurality of connecting holes connecting the upper and lower surfaces of the first support plate (10); the support frame (11) comprises a frame body, a plurality of first protrusions (112) and a plurality of second protrusions (113) respectively arranged on two opposite sides of the frame body, and a plurality of reinforcing beams (114) connected between the first protrusions (112) and the second protrusions (113), the plurality of first protrusions (112) corresponding to the plurality of second protrusions (113) one by one, the porous structure (12) comprising a porous base layer (121) and a plurality of third protrusions (122) arranged on the porous base layer (121), each of the third protrusions (122) being located between the corresponding first protrusion (112) and the second protrusion (113), and being located below the corresponding reinforcing beam (114); The first pushing member (30) is provided with a sliding groove (35), and the first supporting plate (10) is provided with a sliding block (13) located in the sliding groove (35); when the distance between the first supporting plate (10) and the second supporting plate (20) changes, the sliding block (13) slides and cooperates with the sliding groove (35); The first pushing member (30) is located at one end of the first supporting plate (10), the opening of the slide groove (35) is arranged toward the first supporting plate (10), and the first pushing member (30) is also provided with an anti-slip protrusion (351) located on the side wall of the slide groove (35); the sliding block (13) is provided with an anti-slip groove (14), and the anti-slip protrusion (351) is movably arranged in the anti-slip groove (14) and cooperates with the anti-slip groove (14) to prevent slipping.

2. The intervertebral prosthesis according to claim 1, characterized in that The plurality of first protrusions (112), the plurality of second protrusions (113), the plurality of third protrusions (122), and the plurality of reinforcing beams (114) form a toothed structure.

3. The intervertebral prosthesis according to claim 1, characterized in that: The first pushing member (30) comprises a pushing block (31) and a connecting shaft (32) connected to the pushing block (31); the connecting shaft (32) is sandwiched between the first support plate (10) and the second support plate (20); the pushing block (31) abuts between a first end of the first support plate (10) and a first end of the second support plate (20); and a placement gap is provided between the connecting shaft (32) and the porous structure (12).

4. The intervertebral prosthesis according to claim 1, characterized in that: The first pushing member (30) comprises a pushing block (31) and a connecting shaft (32) connected to the pushing block (31); the connecting shaft (32) is sandwiched between the first support plate (10) and the second support plate (20); the pushing block (31) abuts between a first end of the first support plate (10) and a first end of the second support plate (20); and the second pushing member (40) abuts between a second end of the first support plate (10) and a second end of the second support plate (20); The driving member (50) is a driving screw, the screw head (51) of the driving screw is rotatably connected to the second pushing member (40), the connecting shaft (32) is provided with a threaded hole that matches with the screw rod (52) of the driving screw, and the screw rod (52) passes through the second pushing member (40) and extends into the threaded hole; The intervertebral prosthesis further comprises a limiting opening ring (60) arranged between the second pushing member (40) and the screw head (51); the second pushing member (40) is provided with a countersunk hole for accommodating the screw head (51); a first limiting ring groove (36) is provided on the side wall of the countersunk hole; a second limiting ring groove (511) is provided on the screw head (51); the limiting opening ring (60) has a deformed opening; the limiting opening ring (60) is limitedly arranged in the first limiting ring groove (36) and the second limiting ring groove (511).

5. The intervertebral prosthesis according to claim 1, characterized in that: The first pushing member (30) comprises a pushing block (31) and a connecting shaft (32) connected to the pushing block (31); the connecting shaft (32) is sandwiched between the first support plate (10) and the second support plate (20); the pushing block (31) abuts between a first end of the first support plate (10) and a first end of the second support plate (20); and the second pushing member (40) abuts between a second end of the first support plate (10) and a second end of the second support plate (20); The connecting shaft (32) is provided with a guide protrusion (34), and the first support plate (10) is provided with a guide slideway (15) capable of guiding and cooperating with the guide protrusion (34), and the guide slideway (15) passes through the upper and lower surfaces of the first support plate (10); when the distance between the first support plate (10) and the second support plate (20) is the smallest, one end of the guide protrusion (34) protrudes from or is flush with the upper surface of the first support plate (10).

6. The intervertebral prosthesis according to claim 5, characterized in that The guide protrusion (34) comprises a guide section (341) and a reinforcing rib (342) connected between the guide section (341) and the connecting shaft (32).

7. The intervertebral prosthesis according to claim 1, characterized in that: The first pushing member (30) comprises a pushing block (31) and a connecting shaft (32) connected to the pushing block (31); the connecting shaft (32) is sandwiched between the first support plate (10) and the second support plate (20); the pushing block (31) abuts between a first end of the first support plate (10) and a first end of the second support plate (20); and the second pushing member (40) abuts between a second end of the first support plate (10) and a second end of the second support plate (20); A first inclined surface (311), a second inclined surface (312) and a transition surface (313) connecting the first inclined surface (311) and the second inclined surface (312) are arranged at one end of the pushing block (31) away from the second pushing member (40); the first inclined surface (311) and the second inclined surface (312) are arranged at an angle, and in a direction from approaching the second pushing member (40) to moving away from the second pushing member (40), the distance between the first inclined surface (311) and the second inclined surface (312) gradually decreases.

8. The intervertebral prosthesis according to claim 7, characterized in that The included angle formed between the first inclined surface (311) and the second inclined surface (312) is greater than or equal to 100 degrees and less than or equal to 120 degrees; and / or, The transition surface (313) comprises a plane segment (3133) and a first arc segment (3131) and a second arc segment (3132) respectively connected to two opposite ends of the plane segment (3133); the first arc segment (3131) is connected to the first inclined surface (311), and the second arc segment (3132) is connected to the second inclined surface (312).

Images