Intervertebral prosthesis and intervertebral prosthesis assembly

Abstract

The application provides an intervertebral prosthesis and an intervertebral prosthesis assembly, wherein the intervertebral prosthesis comprises: an upper endplate; a lower endplate, which is arranged in a spaced manner with the upper endplate; an adjusting shaft assembly, which is arranged between the upper endplate and the lower endplate, and comprises an outer shaft and an inner shaft which is telescopically arranged in the outer shaft; a first adjusting member, which is arranged on the inner shaft; a first transmission structure, which is connected between the first adjusting member and a first end of the upper endplate and connected between the first adjusting member and a first end of the lower endplate; a second adjusting member, which is movably arranged on the outer shaft; and a second transmission structure, which is connected between the second adjusting member and a second end of the upper endplate and connected between the second adjusting member and a second end of the lower endplate. The technical scheme of the application effectively solves the problem that the intervertebral prosthesis in the related art is difficult to match the natural angle of the intervertebral space, and reduces the problem of the use stability of the intervertebral prosthesis.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, and in particular, to an intervertebral prosthesis and an intervertebral prosthesis assembly. BACKGROUND

[0002] In the field of medical devices, intervertebral prostheses are widely used, and are mainly used for treating intervertebral disc lesions or spinal instability caused by spinal degenerative diseases, spinal fractures, spinal tumors and the like. The intervertebral prosthesis can provide support between the intervertebral spaces, promote bone fusion between the vertebral bodies, and maintain the normal sequence and stability of the spine.

[0003] The intervertebral prosthesis in the related art includes an upper endplate and a lower endplate, and the overall height of the intervertebral prosthesis is adjusted by moving the upper endplate and the lower endplate towards or away from each other. Since the moving directions of the upper endplate and the lower endplate are always opposite, the relative angle between the outer surfaces of the upper endplate and the lower endplate remains fixed, that is, the angle between the two surfaces of the intervertebral prosthesis that contact the intervertebral space is fixed.

[0004] The intervertebral space of a normal human body not only has a height difference, but also has a certain angle difference to adapt to the natural physiological curvature and load requirements of the spine. Since the angle between the two surfaces of the intervertebral prosthesis in the related art that contact the intervertebral space is fixed, the intervertebral prosthesis is difficult to match the natural angle of the intervertebral space, which easily causes loosening or displacement of the intervertebral prosthesis after implantation, and reduces the use stability of the intervertebral prosthesis. SUMMARY

[0005] The main purpose of the present application is to provide an intervertebral prosthesis and an intervertebral prosthesis assembly to solve the problem that the intervertebral prosthesis in the related art is difficult to match the natural angle of the intervertebral space, which reduces the use stability of the intervertebral prosthesis.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an intervertebral prosthesis is provided, comprising: an upper endplate; a lower endplate, which is arranged in a spaced manner with the upper endplate; an adjustment shaft assembly, which is arranged between the upper endplate and the lower endplate, and comprises an outer shaft and an inner shaft which is telescopically arranged in the outer shaft; a first adjustment member, which is arranged on the inner shaft; a first transmission structure, which is connected between the first adjustment member and a first end of the upper endplate and is connected between the first adjustment member and a first end of the lower endplate; a second adjustment member, which is movably arranged on the outer shaft; and a second transmission structure, which is connected between the second adjustment member and a second end of the upper endplate and is connected between the second adjustment member and a second end of the lower endplate.

[0007] Further, the inner shaft is provided with a first external thread segment, the outer shaft is provided with a second external thread segment, the outer shaft is further provided with a first threaded hole penetrating through both ends of the outer shaft along the axial direction of the outer shaft, and part of the first external thread segment extends into the first threaded hole and is threadedly matched with the first threaded hole; the first adjusting member comprises a first connecting ring rotatably sleeved on the inner shaft along the circumferential direction of the inner shaft, the first connecting ring is arranged at one end of the inner shaft away from the outer shaft, and the first transmission structure is connected with the first connecting ring; the second adjusting member comprises a second connecting ring and a matching sleeve rotatably arranged on the second connecting ring, the matching sleeve is provided with a second threaded hole, the matching sleeve is sleeved on the outer shaft and is threadedly matched with the second external thread segment, and the second transmission structure is connected with the second connecting ring.

[0008] Further, an end face of the inner shaft extending into the first threaded hole is provided with a first operation hole, the first operation hole is in communication with the outside of the intervertebral prosthesis; one end of the outer shaft away from the first connecting ring is provided with a second operation hole; a surface of the matching sleeve away from the first connecting ring is provided with a third operation hole.

[0009] Further, the second external thread segment is provided with a stop ring protruding along the radial direction of the second external thread segment, the stop ring is located at one end of the second external thread segment away from the first connecting ring; the stop ring is located on the side of the matching sleeve away from the first connecting ring and is stop matched with the matching sleeve; and / or, the second operation hole is arranged on the surface of the stop ring away from the first connecting ring.

[0010] Further, the first transmission structure comprises a first connecting rod and a second connecting rod, a first end of the first connecting rod is hingedly connected with a first end of the upper end plate, a second end of the first connecting rod is hingedly connected with the first adjusting member, a first end of the second connecting rod is hingedly connected with a first end of the lower end plate, and a second end of the second connecting rod is hingedly connected with the first adjusting member; the second transmission structure comprises a third connecting rod and a fourth connecting rod, a first end of the third connecting rod is hingedly connected with a second end of the upper end plate, a second end of the third connecting rod is hingedly connected with the second adjusting member, a first end of the fourth connecting rod is hingedly connected with a second end of the lower end plate, and a second end of the fourth connecting rod is hingedly connected with the second adjusting member.

[0011] Further, the first end of the upper end plate is provided with a first hinge shaft, the first end of the first connecting rod is hingedly connected with the first hinge shaft; the second end of the upper end plate is provided with a second hinge shaft, the first end of the third connecting rod is hingedly connected with the second hinge shaft; and / or, the first end of the lower end plate is provided with a third hinge shaft, the first end of the second connecting rod is hingedly connected with the third hinge shaft; the second end of the lower end plate is provided with a fourth hinge shaft, and the first end of the fourth connecting rod is hingedly connected with the fourth hinge shaft.

[0012] Further, the upper endplate comprises an upper endplate frame and an upper movable plate movably arranged in the upper endplate frame, the upper movable plate being movable to have a first protruding position protruding out of a surface of the upper endplate frame and a first retracted position retracted into the upper endplate frame; the intervertebral prosthesis further comprises a support plate supported between the lower endplate and the upper movable plate to keep the upper movable plate in the first protruding position.

[0013] Further, the upper movable plate is provided with a first clamping groove, the support plate comprises a first support block, a second support block and an elastic member connected between the first support block and the second support block, the first support block extends into the first clamping groove and is clamped with the first clamping groove, and the second support block is connected with the lower endplate.

[0014] Further, the support plate further comprises a housing, the housing has a first opening, the elastic member, at least part of the first support block and at least part of the second support block are arranged in the housing, and the first support block is telescopically arranged at the first opening; the first support block, the second support block and the housing enclose a containing cavity, and the housing is provided with an injection port in communication with the containing cavity.

[0015] Further, the first support block is provided with a first fixing hole, the housing is provided with a first long slot extending along the floating direction of the first support block, the intervertebral prosthesis further comprises a first fastener, the first fastener passes through the first long slot and extends into the first fixing hole to fixedly connect the first support block with the housing.

[0016] Further, the lower endplate comprises a lower endplate frame and a lower movable plate movably arranged in the lower endplate frame, the lower movable plate being movable to have a second protruding position protruding out of a surface of the lower endplate frame and a second retracted position retracted into the lower endplate frame; the lower movable plate is provided with a second clamping groove, the second support block extends into the second clamping groove and is clamped with the second clamping groove; the housing further has a second opening, the second support block is telescopically arranged at the second opening; the second support block is provided with a second fixing hole, the housing is provided with a second long slot extending along the floating direction of the second support block, and the intervertebral prosthesis further comprises a second fastener, the second fastener passes through the second long slot and extends into the second fixing hole to fixedly connect the second support block with the housing.

[0017] According to another aspect of the present application, there is provided an intervertebral prosthesis assembly, comprising an intervertebral prosthesis, a first adjusting tool and a second adjusting tool, the intervertebral prosthesis being the intervertebral prosthesis described above, the first adjusting tool being capable of cooperating with the inner shaft and the outer shaft to drive the inner shaft and the outer shaft to rotate relatively, and the second adjusting tool being capable of cooperating with the outer shaft and the cooperating sleeve to drive the outer shaft and the cooperating sleeve to rotate relatively.

[0018] Further, the first adjusting tool comprises a first sleeve, a first rotating rod and a first inserting rod, the first rotating rod is rotatably and movably arranged in the first sleeve along the axial direction of the first sleeve, and the first inserting rod is arranged on the first sleeve; the first rotating rod is capable of being inserted into the first operating hole and fixedly connected with the inner shaft, and the first inserting rod is capable of being inserted into the second operating hole and fixedly connected with the outer shaft; and / or, the second adjusting tool comprises a second sleeve, a second rotating rod, a third inserting rod and a fourth inserting rod, the second rotating rod is rotatably and movably arranged in the second sleeve along the axial direction of the second sleeve, the third inserting rod is arranged on the second rotating rod, and the fourth inserting rod is arranged on the second sleeve; the third inserting rod is capable of being inserted into the second operating hole and fixedly connected with the outer shaft, and the fourth inserting rod is capable of being inserted into the third operating hole and fixedly connected with the matching sleeve.

[0019] According to another aspect of the present application, there is provided an intervertebral prosthesis assembly comprising an intervertebral prosthesis and a support plate adjusting tool detachably arranged with the intervertebral prosthesis, the intervertebral prosthesis is the intervertebral prosthesis as described above, and the support plate adjusting tool comprises a tool body, a first inserting rod, a second inserting rod and a clamping member, the first inserting rod is arranged on the tool body, the second inserting rod is movably arranged on the tool body, the first inserting rod is capable of being inserted into the first fixed hole and fixedly connected with the first support block, the second inserting rod is capable of being inserted into the second fixed hole and fixedly connected with the second support block, and the clamping member is movably arranged on the tool body and drives the second inserting rod to move close to the first inserting rod.

[0020] Further, a guide hole is arranged on the tool body, the second inserting rod is movably arranged in the guide hole and guided by the guide hole; and / or, a third threaded hole is arranged on the tool body, the clamping member comprises a screw rod and a stop block arranged on one end of the screw rod, the screw rod is threadedly matched with the third threaded hole, the second inserting rod is arranged on the screw rod, and the second inserting rod is stop matched with the stop block.

[0021] According to the technical solution of this invention, the intervertebral prosthesis includes: a superior endplate, a inferior endplate, an adjusting shaft assembly, a first adjusting member, a first transmission structure, a second adjusting member, and a second transmission structure. The inferior endplate and the superior endplate are spaced apart. The adjusting shaft assembly is disposed between the superior and inferior endplates, and includes an outer shaft and an inner shaft retractably disposed within the outer shaft. The first adjusting member is disposed on the inner shaft. The first transmission structure connects the first adjusting member to a first end of the superior endplate and also connects the first adjusting member to a first end of the inferior endplate. The second adjusting member is movably disposed on the outer shaft. The second transmission structure connects the second adjusting member to a second end of the superior endplate and also connects the second adjusting member to a second end of the inferior endplate. Thus, by retractably disposing the inner shaft in the adjusting shaft assembly within the outer shaft, the inner shaft can move relative to the outer shaft. When the inner shaft extends and retracts relative to the outer shaft, it drives the first adjusting member to move. This movement, via a first transmission structure, causes the first ends of the upper and lower endplates to move closer or further apart, thus converting the extension and retraction of the inner shaft into angle adjustment between the first ends of the upper and lower endplates. By movably mounting the second adjusting member on the outer shaft, when it moves relative to the outer shaft, it drives the second ends of the upper and lower endplates to move closer or further apart via a second transmission structure, again converting this movement into angle adjustment between the second ends of the upper and lower endplates. This configuration enables independent adjustment of the angle between the two surfaces of the intervertebral disc prosthesis and the intervertebral space, allowing for adjustment of the relative angle between the upper and lower endplates. This ensures the intervertebral disc prosthesis better matches the natural physiological curvature of the intervertebral space, resulting in a tighter fit and reducing the risk of loosening or displacement after implantation, thereby improving the stability of the intervertebral disc prosthesis. Therefore, the technical solution of this application effectively solves the problem in related technologies that intervertebral prostheses are difficult to match the natural angle of the intervertebral space, thus reducing the stability of the intervertebral prosthesis. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 A three-dimensional structural schematic diagram of an embodiment of an intervertebral prosthesis according to the present invention is shown;

[0024] Figure 2 It shows Figure 1 A partial exploded structural diagram of an intervertebral prosthesis;

[0025] Figure 3 It shows Figure 1perspective view of the support plate of the intervertebral prosthesis of

[0026] Figure 4 is shown Figure 1 perspective view of the support plate of the intervertebral prosthesis of

[0027] Figure 5 is shown Figure 1 partial perspective view of the intervertebral prosthesis of

[0028] Figure 6 is shown Figure 5 perspective view of the intervertebral prosthesis of

[0029] Figure 7 is shown

[0030] Figure 8 is shown Figure 7 perspective view of the first adjustment tool of the intervertebral prosthesis assembly of

[0031] Figure 9 is shown

[0032] Figure 10 is shown Figure 9 perspective view of the second adjustment tool of the intervertebral prosthesis assembly of

[0033] Figure 11 is shown

[0034] Figure 12 is shown Figure 11 perspective view of the support plate adjustment tool of the intervertebral prosthesis assembly of

[0035] Figure 13 is shown Figure 11 perspective view of the support plate adjustment tool of the intervertebral prosthesis assembly of

[0036] wherein the above figures comprise the following reference signs:

[0037] 10, upper endplate; 11, upper endplate frame; 112, second hinge shaft; 12, upper movable plate;

[0038] 20, lower endplate; 21, lower endplate frame; 211, third hinge shaft; 212, fourth hinge shaft; 22, lower movable plate; 221, second clamping slot;

[0039] 30, adjusting shaft assembly; 31, inner shaft; 311, first outer threaded section; 312, first operation hole; 32, outer shaft; 321, second outer threaded section; 322, first threaded hole; 323, stop ring; 3231, second operation hole;

[0040] 40, first adjusting member; 41, first connecting ring;

[0041] 50, first transmission structure; 51, first connecting rod; 52, second connecting rod;

[0042] 60, second adjusting member; 61, second connecting ring; 62, matching sleeve; 621, second threaded hole; 622, third operation hole;

[0043] 70, second transmission structure; 71, third connecting rod; 72, fourth connecting rod;

[0044] 80, support plate; 81, first support block; 811, first fixed hole; 82, second support block; 821, second fixed hole; 83, elastic member; 84, housing; 841, first opening; 842, injection port; 843, first long slot; 844, second long slot; 85, closing plug;

[0045] 91, first fastener; 92, second fastener;

[0046] 100, first adjusting tool; 110, first sleeve; 120, first rotating rod; 130, first inserting rod;

[0047] 200, second adjusting tool; 210, second sleeve; 220, second rotating rod; 230, third inserting rod; 240, fourth inserting rod;

[0048] 300, support plate adjusting tool; 310, tool main body; 313, guide hole; 314, third threaded hole; 320, first inserting rod; 330, second inserting rod; 340, clamping member; 341, screw rod; 342, stop block. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative work, are within the scope of protection of the present application.

[0050] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0052] In this embodiment, as Figures 1 to 6 As shown, the intervertebral prosthesis includes: a superior endplate 10, a inferior endplate 20, an adjustment shaft assembly 30, a first adjustment member 40, a first transmission structure 50, a second adjustment member 60, and a second transmission structure 70. The inferior endplate 20 is spaced apart from the superior endplate 10. The adjustment shaft assembly 30 is disposed between the superior endplate 10 and the inferior endplate 20, and includes an outer shaft 32 and an inner shaft 31 retractably disposed within the outer shaft 32. The first adjustment member 40 is disposed on the inner shaft 31. The first transmission structure 50 connects the first adjustment member 40 to a first end of the superior endplate 10 and also connects the first adjustment member 40 to a first end of the inferior endplate 20. The second adjustment member 60 is movably disposed on the outer shaft 32. The second transmission structure 70 connects the second adjustment member 60 to a second end of the superior endplate 10 and also connects the second adjustment member 60 to a second end of the inferior endplate 20.

[0053] In this way, by arranging the inner shaft 31 in the adjusting shaft assembly 30 to be telescopically arranged in the outer shaft 32, the inner shaft 31 is enabled to move relative to the outer shaft 32. When the inner shaft 31 moves telescopically relative to the outer shaft 32, the inner shaft 31 is enabled to move the first adjusting member 40, and the first adjusting member 40 moves to bring the first end of the upper end plate 10 and the first end of the lower end plate 20 closer to or farther away from each other through the first transmission structure 50, so that the telescopic movement of the inner shaft 31 can be converted into the angle adjustment between the first end of the upper end plate 10 and the first end of the lower end plate 20. By movably arranging the second adjusting member 60 on the outer shaft 32, when the second adjusting member 60 moves relative to the outer shaft 32, the second adjusting member 60 is enabled to bring the second end of the upper end plate 10 and the second end of the lower end plate 20 closer to or farther away from each other through the second transmission structure 70, so that the movement of the second adjusting member 60 can be converted into the angle adjustment between the second end of the upper end plate 10 and the second end of the lower end plate 20. Through the above arrangement, the independent adjustment of the angle between the two surfaces in contact with the intervertebral space of the intervertebral prosthesis is realized, so that the relative angle between the upper end plate 10 and the lower end plate 20 can be adjusted, ensuring that the intervertebral prosthesis can better match the natural physiological curvature of the intervertebral space, so that the intervertebral prosthesis is more closely fitted to the intervertebral space, reducing the risk of loosening or displacement of the intervertebral prosthesis after implantation, and improving the use stability of the intervertebral prosthesis. Therefore, the technical scheme of the embodiment effectively solves the problem that the intervertebral prosthesis in the related art is difficult to match the natural angle of the intervertebral space, and reduces the use stability of the intervertebral prosthesis.

[0054] In addition, the inventors found that another intervertebral prosthesis in the related art includes a fixedly connected upper end plate and a lower end plate, and generally needs to confirm the model specification of the intervertebral prosthesis suitable for the parameters of the intervertebral space, obtain the intervertebral prosthesis with the corresponding parameters through customization, and implant the intervertebral prosthesis in the predetermined position through knocking by using an implantation tool during implantation. Such implantation operation can cause damage to the human vertebrae.

[0055] According to the technical scheme of the above embodiment, the first end of the upper end plate 10 and the first end of the lower end plate 20 can be brought close to each other by the extension and retraction of the inner shaft 31, and the second end of the upper end plate 10 and the second end of the lower end plate 20 can be brought close to each other by the movement of the second adjusting member 60 on the outer shaft 32, so as to reduce the overall height of the intervertebral prosthesis, thereby facilitating the implantation of the intervertebral prosthesis into the intervertebral space and avoiding the need for using a knocking method for implantation in the related art, and reducing the damage to the human vertebral body. After the intervertebral prosthesis is implanted, the first end of the upper end plate 10 and the first end of the lower end plate 20 can be brought away from each other by driving the inner shaft 31 to extend and retract relative to the outer shaft 32, and the second end of the upper end plate 10 and the second end of the lower end plate 20 can be brought away from each other by the movement of the second adjusting member 60 on the outer shaft 32, so as to increase the overall height of the intervertebral prosthesis, thereby facilitating the support of the intervertebral prosthesis on the intervertebral space and improving the use stability of the intervertebral prosthesis.

[0056] As Figure 5 and Figure 6As shown, the inner shaft 31 is provided with a first external thread segment 311, the outer shaft 32 is provided with a second external thread segment 321, and the outer shaft 32 is further provided with a first threaded hole 322 penetrating through both ends of the outer shaft 32 along the axial direction of the outer shaft 32, and part of the first external thread segment 311 extends into the first threaded hole 322 and is threadedly matched with the first threaded hole 322. The first adjusting member 40 comprises a first connecting ring 41 rotatably sleeved on the inner shaft 31 along the circumferential direction of the inner shaft 31, the first connecting ring 41 is arranged at one end of the inner shaft 31 away from the outer shaft 32, and the first transmission structure 50 is connected with the first connecting ring 41. The second adjusting member 60 comprises a second connecting ring 61 and a matching sleeve 62 rotatably arranged on the second connecting ring 61, the matching sleeve 62 is provided with a second threaded hole 621, the matching sleeve 62 is sleeved on the outer shaft 32 and is threadedly matched with the second external thread segment 321, and the second transmission structure 70 is connected with the second connecting ring 61. The first threaded hole 322 penetrates through both ends of the outer shaft 32 along the axial direction of the outer shaft 32, so that the user can drive the inner shaft 31 to rotate relative to the outer shaft 32 at both ends of the inner shaft 31, thereby facilitating the adjustment operation. Moreover, the first threaded hole 322 penetrates through both ends of the outer shaft 32, so that the user can drive the inner shaft 31 to rotate relative to the outer shaft 32 and drive the second adjusting member 60 to move relative to the outer shaft 32 at the same side, so that the user can operate the inner shaft 31 and the second adjusting member 60 at the same side after the intervertebral prosthesis is implanted, and the adjustment of the intervertebral prosthesis is more convenient. By arranging the first external thread segment 311 on the inner shaft 31 and the first threaded hole 322 on the outer shaft 32, the inner shaft 31 can move along the axial direction of the outer shaft 32 when the inner shaft 31 rotates relative to the outer shaft 32, thereby driving the first adjusting member 40 to move. By arranging the second external thread segment 321 on the outer shaft 32 and the second threaded hole 621 on the matching sleeve 62, the matching sleeve 62 can move along the axial direction of the outer shaft 32 when the matching sleeve 62 rotates relative to the outer shaft 32, thereby driving the second connecting ring 61 to move along the axial direction of the outer shaft 32, so as to drive the second end of the upper end plate 10 and the second end of the lower end plate 20 to move closer to or farther away from each other through the second transmission structure 70. Moreover, the matching sleeve 62 is rotatably arranged on the second connecting ring 61, so that the second connecting ring 61 can keep moving along the axial direction of the outer shaft 32 when the matching sleeve 62 rotates, so that the movement of the second connecting ring 61 is more stable, and the adjustment of the second end of the upper end plate 10 and the second end of the lower end plate 20 is more stable and reliable.

[0057] In some embodiments, the first connecting ring 41 is fixed relative to the inner shaft 31 in the axial direction of the inner shaft 31. That is, the first connecting ring 41 only rotates relative to the inner shaft 31 and does not move relative to the inner shaft 31. The inner shaft 31 is provided with a first reduced diameter section, and the first connecting ring 41 is provided with a first through hole, which is sleeved outside the first reduced diameter section, so that the first connecting ring 41 can rotate relative to the inner shaft 31. The cooperating sleeve 62 is provided with a second reduced diameter section, and the second connecting ring 61 is provided with a second through hole, which is sleeved outside the second reduced diameter section, so that the cooperating sleeve 62 can rotate relative to the second connecting ring 61.

[0058] As shown in Figure 5 , the end surface of the inner shaft 31 extending into the first threaded hole 322 is provided with a first operation hole 312, which communicates with the outside of the intervertebral prosthesis. The end of the outer shaft 32 away from the first connecting ring 41 is provided with a second operation hole 3231. The surface of the cooperating sleeve 62 away from the first connecting ring 41 is provided with a third operation hole 622. The provision of the first operation hole 312 facilitates the user to fix the inner shaft 31 with a tool, thereby facilitating the adjustment operation of the inner shaft 31. The provision of the first operation hole 312 communicating with the outside of the intervertebral prosthesis facilitates the user to drive the inner shaft 31. The provision of the second operation hole 3231 facilitates the user to fix the outer shaft 32 with a tool, thereby facilitating the adjustment operation of the outer shaft 32. The provision of the third operation hole 622 facilitates the user to fix the cooperating sleeve 62 with a tool, thereby facilitating the adjustment operation of the cooperating sleeve 62. Moreover, through the above-mentioned arrangement, the first operation hole 312, the second operation hole 3231 and the third operation hole 622 are all located at the same end of the intervertebral prosthesis, further facilitating the adjustment operation of the user.

[0059] In some embodiments, as shown in Figure 5 , in the projection plane perpendicular to the axis of the outer shaft 32, the third operation hole 622 is located outside the second operation hole 3231, and the second operation hole 3231 is located outside the first operation hole 312. Moreover, the third operation hole 622 is a plurality of holes arranged along the circumference of the outer shaft 32, the second operation hole 3231 is a plurality of holes arranged along the circumference of the outer shaft 32, and the first operation hole 312 is one hole.

[0060] As shown in Figure 5 and Figure 6As shown, the second outer threaded segment 321 is provided with a stop ring 323 protruding in the radial direction of the second outer threaded segment 321, and the stop ring 323 is located at the end of the second outer threaded segment 321 away from the first connecting ring 41. The stop ring 323 is located at the side of the fitting sleeve 62 away from the first connecting ring 41 and is in stop cooperation with the fitting sleeve 62. A second operation hole 3231 is provided on the surface of the stop ring 323 away from the first connecting ring 41. The stop cooperation between the stop ring 323 and the fitting sleeve 62 limits the maximum movement range of the second adjusting member 60 during adjustment, so that the movement of the fitting sleeve 62 on the outer shaft 32 is more reliable, preventing the structure from being out of structure due to excessive adjustment, and ensuring the safety and reliability of the intervertebral prosthesis implantation operation. Moreover, the second operation hole 3231 is provided on the stop ring 323, which is convenient for processing and increases the area where the second operation hole 3231 is provided, facilitating the alignment operation of the user when using the tool.

[0061] In other embodiments, the second outer threaded segment 321 is provided with a stop ring 323 protruding in the radial direction of the second outer threaded segment 321, and the stop ring 323 is located at the end of the second outer threaded segment 321 away from the first connecting ring 41. The stop ring 323 is located at the side of the fitting sleeve 62 away from the first connecting ring 41 and is in stop cooperation with the fitting sleeve 62. Alternatively, a second operation hole 3231 is provided on the surface of the stop ring 323 away from the first connecting ring 41.

[0062] As Figure 2 , Figure 5 and Figure 6As shown, the first transmission structure 50 comprises a first connecting rod 51 and a second connecting rod 52, a first end of the first connecting rod 51 is hinged to a first end of the upper end plate 10, a second end of the first connecting rod 51 is hinged to the first adjusting member 40, a first end of the second connecting rod 52 is hinged to a first end of the lower end plate 20, a second end of the second connecting rod 52 is hinged to the first adjusting member 40. The second transmission structure 70 comprises a third connecting rod 71 and a fourth connecting rod 72, a first end of the third connecting rod 71 is hinged to a second end of the upper end plate 10, a second end of the third connecting rod 71 is hinged to the second adjusting member 60, a first end of the fourth connecting rod 72 is hinged to a second end of the lower end plate 20, a second end of the fourth connecting rod 72 is hinged to the second adjusting member 60. The first transmission structure 50 and the second transmission structure 70 are respectively hinged to the upper end plate 10 and the lower end plate 20 through the first connecting rod 51, the second connecting rod 52, the third connecting rod 71 and the fourth connecting rod 72, realizing flexibility and reliability of the upper end plate 10 and the lower end plate 20 in angle adjustment, so that the upper end plate 10 and the lower end plate 20 can be accurately adjusted to adapt to the natural physiological curvature of the intervertebral space. Moreover, the first transmission structure 50 and the second transmission structure 70 are simple in structure and convenient to process. When the first adjusting member 40 moves on the inner shaft 31, the first adjusting member 40 drives the second end of the first connecting rod 51 to move, so that the first connecting rod 51 swings, thereby driving the first end of the upper end plate 10 hinged to the first end of the first connecting rod 51 to be close to or away from the first end of the lower end plate 20. The linkage relationship between the first adjusting member 40 and the second connecting rod 52 is the same as the linkage relationship between the first adjusting member 40 and the first connecting rod 51. When the second adjusting member 60 moves on the outer shaft 32, the second adjusting member 60 drives the second end of the third connecting rod 71 to move, so that the third connecting rod 71 swings, thereby driving the second end of the upper end plate 10 hinged to the first end of the third connecting rod 71 to be close to or away from the second end of the lower end plate 20. The linkage relationship between the second adjusting member 60 and the fourth connecting rod 72 is the same as the linkage relationship between the second adjusting member 60 and the third connecting rod 71.

[0063] In an embodiment not shown, the first transmission structure comprises a first taper surface arranged on the first end of the upper end plate and a second taper surface arranged on the first end of the lower end plate, and the first adjusting member is arranged between the first taper surface and the second taper surface. When the first adjusting member moves, the first adjusting member abuts against both the first taper surface and the second taper surface to push the first end of the upper end plate and the first end of the lower end plate away from each other. The second transmission structure comprises a third taper surface arranged on the second end of the upper end plate and a fourth taper surface arranged on the second end of the lower end plate, and the second adjusting member is arranged between the third taper surface and the fourth taper surface. When the second adjusting member moves on the outer shaft, the second adjusting member abuts against both the third taper surface and the fourth taper surface to push the second end of the upper end plate and the second end of the lower end plate away from each other.

[0064] AsFigure 1 、 Figure 2 and Figure 5 As shown in

[0065] In other embodiments, the first end of the upper end plate 10 is provided with a first hinge shaft, and the first end of the first connecting rod 51 is hinged to the first hinge shaft. The second end of the upper end plate 10 is provided with a second hinge shaft 112, and the first end of the third connecting rod 71 is hinged to the second hinge shaft 112. Alternatively, the first end of the lower end plate 20 is provided with a third hinge shaft 211, and the first end of the second connecting rod 52 is hinged to the third hinge shaft 211. The second end of the lower end plate 20 is provided with a fourth hinge shaft 212, and the first end of the fourth connecting rod 72 is hinged to the fourth hinge shaft 212.

[0066] As shown in Figure 2 and Figure 5 The upper end plate 10 includes an upper end plate frame 11 and an upper movable plate 12 movably arranged in the upper end plate frame 11, and the upper movable plate 12 is movable to have a first protruding position protruding out of the surface of the upper end plate frame 11 and a first retracted position retracted into the upper end plate frame 11. The intervertebral prosthesis further includes a support plate 80 supported between the lower end plate 20 and the upper movable plate 12 to keep the upper movable plate 12 in the first protruding position. In this way, during the implantation of the intervertebral prosthesis, the upper movable plate 12 can be in the first retracted position retracted into the upper end plate frame 11, so that the outer surface of the upper movable plate 12 can be lower than the outer surface of the upper end plate frame 11, reducing the resistance during implantation, also reducing the interference between the upper movable plate 12 and the human vertebral body during implantation, thereby reducing the damage to the human vertebral body and making the implantation more smooth. After the intervertebral prosthesis is implanted, the support plate 80 is supported between the lower end plate 20 and the upper movable plate 12 to keep the upper movable plate 12 in the first protruding position protruding out of the surface of the upper end plate frame 11, to increase the contact area between the upper end plate 10 and the human vertebral body, facilitate bone ingrowth, and improve the stability after implantation, ensuring that the intervertebral prosthesis can better maintain the spinal sequence and stability after implantation, and reduce postoperative complications.

[0067] As shown in Figure 2 and Figure 5 shown, the upper movable plate 12 is provided with a first clamping slot, and the support plate 80 comprises a first support block 81, a second support block 82, and an elastic member 83 connected between the first support block 81 and the second support block 82. The first support block 81 extends into the first clamping slot and is clamped and matched with the first clamping slot, and the second support block 82 is connected with the lower end plate 20. The distance between the first support block 81 and the second support block 82 is adjustable through the arrangement of the elastic member 83, which facilitates the operation of placing the support plate 80 between the upper end plate 10 and the lower end plate 20. The connection of the first support block 81 and the upper movable plate 12 is facilitated through the arrangement of the first clamping slot, so that the connection of the support plate 80 and the upper movable plate 12 is more stable and reliable.

[0068] In some embodiments, the elastic member 83 is a plurality of spacers, so that the first support block 81 can match the inclination angle of the upper end plate 10, thereby better supporting the upper end plate 10. The elastic member 83 is preferably a spring.

[0069] As shown in Figure 3 and Figure 4 shown, the support plate 80 further comprises a housing 84, the housing 84 has a first opening 841, the elastic member 83, at least part of the first support block 81 and at least part of the second support block 82 are arranged in the housing 84, and the first support block 81 is telescopically arranged at the first opening 841. The first support block 81, the second support block 82 and the housing 84 enclose a containing cavity, and the housing 84 is provided with an injection port 842 communicating with the containing cavity. The arrangement of the housing 84 not only protects the internal first support block 81, the second support block 82 and the elastic member 83, but also facilitates the formation of the containing cavity. After the support plate 80 is arranged between the upper end plate 10 and the lower end plate 20, bone cement is injected into the containing cavity through the injection port 842, so that the relative position of the first support block 81 and the second support block 82 can be fixed, the structural strength of the support plate 80 is enhanced, the support plate 80 can be more reliably supported between the upper end plate 10 and the lower end plate 20, the structural strength of the intervertebral prosthesis is improved, and the upper movable plate 12 can be more reliably maintained at the first protruding position.

[0070] In some embodiments, the intervertebral prosthesis further comprises a closure plug 85 arranged at the injection port 842. The injection port 842 is threadedly matched with the closure plug 85 to improve the sealing effect.

[0071] As shown in Figure 3 and Figure 4As shown, the first support block 81 is provided with a first fixing hole 811, and the housing 84 is provided with a first elongated hole 843 extending along the floating direction of the first support block 81. The intervertebral prosthesis also includes a first fastener 91, which passes through the first elongated hole 843 and extends into the first fixing hole 811 to fix the first support block 81 to the housing 84. The first fastener 91 passes through the first elongated hole 843 on the housing 84 and cooperates with the first fixing hole 811 on the first support block 81 to fix the position of the first support block 81, so that the upper movable plate 12 can be held in the first protruding position. Furthermore, the first elongated hole 843 makes the position of the first support block 81 adjustable when it is fixedly connected to the housing 84, improving the flexibility of the intervertebral prosthesis.

[0072] like Figures 1 to 6 As shown, the lower endplate 20 includes a lower endplate frame 21 and a lower movable plate 22 movably disposed within the lower endplate frame 21. The lower movable plate 22 is movable to have a second protruding position protruding from the surface of the lower endplate frame 21 and a second retracted position retracted within the lower endplate frame 21. A second slot 221 is provided on the lower movable plate 22, and a second support block 82 extends into the second slot 221 and engages with it. The housing 84 also has a second opening, and the second support block 82 is telescopically disposed at the second opening. A second fixing hole 821 is provided on the second support block 82, and a second elongated hole 844 extending along the floating direction of the second support block 82 is provided on the housing 84. The intervertebral prosthesis also includes a second fastener 92, which passes through the second elongated hole 844 and extends into the second fixing hole 821, so that the second support block 82 is fixedly connected to the housing 84. The movable design of the lower movable plate 22 allows it to move between the second protruding position and the second retracted position. Combined with the use of the second fastener 92, this ensures that the lower movable plate 22 is stably maintained in the optimal position, reducing damage to the human vertebral body during implantation, improving the support capacity of the human vertebral body after implantation, strengthening the fit between the intervertebral prosthesis and the human vertebral body, enhancing overall stability, promoting bone fusion, and reducing the risk of loosening.

[0073] In some embodiments, the first hinge shaft and the second hinge shaft 112 are disposed on the upper endplate frame 11, and the third hinge shaft 211 and the fourth hinge shaft 212 are disposed on the lower endplate frame 21. Both the upper endplate 10 and the lower endplate 20 are manufactured using 3D printing technology, and both the upper movable plate 12 and the lower movable plate 22 employ a rough trabecular structure. The first fixing hole 811 and the second fixing hole 821 are threaded holes, and the first fastener 91 and the second fastener 92 are bolts.

[0074] In some embodiments, the first support block 81, the second support block 82, the housing 84, the first adjusting member 40, the second adjusting member 60, the first transmission structure 50, and the second transmission structure 70 are all made by 3D printing technology or traditional subtractive manufacturing technology, and the materials are medical-grade metal materials such as titanium alloy and tantalum metal. After anodizing surface treatment, ions such as Ca, Mn, Cu, Ag, Zn, Mg, and P can be introduced into the surface, which can further improve the osteogenic function of the intervertebral prosthesis and also endow the intervertebral prosthesis with antibacterial properties.

[0075] The inventors discovered that most intervertebral fusion prostheses used in related technologies are made of titanium alloy and PEEK. Because these materials are bio-inert, they cannot promote bone tissue growth or form good bio-bonding with human bone tissue. The release of metal ions can also pose a threat to the safety and effectiveness of the prosthesis. Bacterial infection of the prosthesis can also affect clinical application outcomes. However, by applying the above-described embodiments and performing surface treatment on the intervertebral prosthesis, ions with osteogenic and antibacterial properties can be introduced, improving the prosthesis's corrosion resistance, enhancing its bioactivity, and thus promoting osteogenic and antibacterial properties, thereby improving the prosthesis's clinical application outcomes.

[0076] In some embodiments, the upper movable plate 12 includes a first plate and two second plates respectively disposed at the two side edges of the first plate, the thickness of the first plate being greater than that of the second plates. The upper end plate frame 11 has a third opening on its surface opposite to the lower end plate 20, and four fourth openings are respectively disposed on its two sides. The second plates are disposed in a one-to-one correspondence with the fourth openings, each second plate being at least partially located within each fourth opening. When the upper movable plate 12 is in a first retracted position, the surface of the first plate opposite to the lower end plate 20 is flush with or lower than the third opening. When the upper movable plate 12 is in a first protruding position, the surface of the first plate opposite to the lower end plate 20 is higher than the third opening. When the upper movable plate 12 switches between the first retracted position and the first protruding position, the second plates and the fourth openings engage in a guiding cooperation to make the movement of the upper movable plate 12 more stable and reliable, and to make the connection between the upper movable plate 12 and the upper end plate frame 11 more reliable.

[0077] This application also provides an intervertebral prosthesis component, such as Figures 7 to 10As shown, the intervertebral prosthesis assembly includes the intervertebral prosthesis, the first adjusting tool 100 and the second adjusting tool 200. The intervertebral prosthesis is the intervertebral prosthesis described above, the first adjusting tool 100 can cooperate with the inner shaft 31 and the outer shaft 32 to drive the relative rotation of the inner shaft 31 and the outer shaft 32. The second adjusting tool 200 can cooperate with the outer shaft 32 and the matching sleeve 62 to drive the relative rotation of the outer shaft 32 and the matching sleeve 62. Since the intervertebral prosthesis described above can solve the problem that the intervertebral prosthesis in the related art is difficult to match the natural angle of the intervertebral gap, the stability of the intervertebral prosthesis is reduced, so that the intervertebral prosthesis assembly with the intervertebral prosthesis can solve the same technical problem. Moreover, the intervertebral prosthesis assembly realizes the accurate adjustment of the height and angle of the intervertebral prosthesis through the cooperation of the first adjusting tool 100 and the second adjusting tool 200, and the comprehensive adjustment capability ensures that the intervertebral prosthesis can adapt to the complex structure of the human intervertebral gap, improves the matching degree and stability after implantation, and also improves the convenience and flexibility of the operation of the intervertebral prosthesis.

[0078] As Figures 7 to 10As shown, the first adjusting tool 100 comprises a first sleeve 110, a first rotating rod 120 movably arranged in the first sleeve 110 along the axial direction of the first sleeve 110, and a first inserting rod 130 arranged on the first sleeve 110. The first rotating rod 120 is capable of being inserted into the first operation hole 312 and fixedly connected with the inner shaft 31, and the first inserting rod 130 is capable of being inserted into the second operation hole 3231 and fixedly connected with the outer shaft 32. Through the arrangement of the first adjusting tool 100, the user can insert the first inserting rod 130 into the second operation hole 3231 and fixedly connect it with the outer shaft 32, insert the first rotating rod 120 into the first operation hole 312 and fixedly connect it with the inner shaft 31, drive the first rotating shaft to rotate relative to the first sleeve 110, drive the inner shaft 31 to rotate relative to the outer shaft 32, and due to the cooperation relationship between the inner shaft 31 and the first threaded hole 322 of the outer shaft 32, the inner shaft 31 can move along the axial direction of the outer shaft 32 and drive the first connecting ring 41 to move along the axial direction of the outer shaft 32, so that the first end of the upper end plate 10 and the first end of the lower end plate 20 can approach or move away from each other, to adjust the height and angle of the intervertebral prosthesis. The second adjusting tool 200 comprises a second sleeve 210, a second rotating rod 220 movably arranged in the second sleeve 210 along the axial direction of the second sleeve 210, a third inserting rod 230 arranged on the second rotating rod 220, and a fourth inserting rod 240 arranged on the second sleeve 210. The third inserting rod 230 is capable of being inserted into the second operation hole 3231 and fixedly connected with the outer shaft 32, and the fourth inserting rod 240 is capable of being inserted into the third operation hole 622 and fixedly connected with the matching sleeve 62. Through the arrangement of the second adjusting tool 200, the user can insert the third inserting rod 230 into the second operation hole 3231 and fixedly connect it with the outer shaft 32, insert the fourth inserting rod 240 into the third operation hole 622 and fixedly connect it with the matching sleeve 62, drive the second rotating rod 220 to rotate relative to the second sleeve 210, drive the matching sleeve 62 to move on the outer shaft 32, and make the matching sleeve 62 drive the second connecting ring 61 to move, so that the second end of the upper end plate 10 and the second end of the lower end plate 20 can approach or move away from each other, to adjust the height and angle of the intervertebral prosthesis.

[0079] In other embodiments, the first adjusting tool 100 comprises a first sleeve 110, a first rotating rod 120 movably arranged in the first sleeve 110 along the axial direction of the first sleeve 110, and a first inserting rod 130 arranged on the first sleeve 110; the first rotating rod 120 is capable of being inserted into the first operation hole 312 and fixedly connected with the inner shaft 31, and the first inserting rod 130 is capable of being inserted into the second operation hole 3231 and fixedly connected with the outer shaft 32. Alternatively, the second adjusting tool 200 comprises a second sleeve 210, a second rotating rod 220 movably arranged in the second sleeve 210 along the axial direction of the second sleeve 210, a third inserting rod 230 arranged on the second rotating rod 220, and a fourth inserting rod 240 arranged on the second sleeve 210; the third inserting rod 230 is capable of being inserted into the second operation hole 3231 and fixedly connected with the outer shaft 32, and the fourth inserting rod 240 is capable of being inserted into the third operation hole 622 and fixedly connected with the matching sleeve 62.

[0080] The present application also provides an intervertebral prosthesis assembly, such as Figures 11 to 13As shown, the intervertebral prosthesis assembly comprises an intervertebral prosthesis and a support plate adjusting tool 300 which is detachably arranged with the intervertebral prosthesis, the intervertebral prosthesis is the intervertebral prosthesis described above. Since the intervertebral prosthesis described above can solve the problem that the intervertebral prosthesis in the related art is difficult to match the natural angle of the intervertebral space, and reduces the stability of the use of the intervertebral prosthesis, the intervertebral prosthesis assembly with the intervertebral prosthesis can solve the same technical problems. The support plate adjusting tool 300 comprises a tool body 310, a first insertion rod 320, a second insertion rod 330 and a clamping piece 340. The first insertion rod 320 is arranged on the tool body 310, the second insertion rod 330 is movably arranged on the tool body 310, the first insertion rod 320 can be inserted into the first fixed hole 811 and fixedly connected with the first support block 81, the second insertion rod 330 can be inserted into the second fixed hole 821 and fixedly connected with the second support block 82, and the clamping piece 340 is movably arranged on the tool body 310 and drives the second insertion rod 330 to approach the first insertion rod 320. Through the design of the support plate adjusting tool 300, efficient adjustment of the support plate 80 is realized. The user can insert the first insertion rod 320 into the first fixed hole 811 and fixedly connect it with the first support block 81, and insert the second insertion rod 330 into the second fixed hole 821 and fixedly connect it with the second support block 82. Before placing the support plate 80 between the upper end plate 10 and the lower end plate 20, the positions of the first support block 81 and the second support block 82 are adjusted, the clamping piece 340 is controlled to drive the second insertion rod 330 to approach the first insertion rod 320, so that the first support block 81 can approach the second support block 82, facilitating the placement operation of the support plate 80. After the support plate 80 is placed between the upper end plate 10 and the lower end plate 20, the support plate adjusting tool 300 is separated from the support plate 80, so that the elastic piece 83 of the support plate 80 can be supported between the upper end plate 10 and the lower end plate 20 under the action of the elastic force. This makes the adjustment process more stable and improves the operation efficiency.

[0081] As Figures 11 to 13As shown, the tool body 310 is provided with a guide hole 313, and the second insertion rod 330 is movably arranged in the guide hole 313 and guided by the guide hole 313. The guide hole 313 is arranged to facilitate the control of the moving direction of the second insertion rod 330, so that the movement of the second insertion rod 330 is more stable and reliable, and the adjustment operation of the first support block 81 and the second support block 82 is more controllable. The tool body 310 is provided with a third threaded hole 314, and the clamping piece 340 includes a screw rod 341 and a stop block 342 arranged at one end of the screw rod 341, the screw rod 341 is in threaded cooperation with the third threaded hole 314, the second insertion rod 330 is arranged on the screw rod 341, and the second insertion rod 330 is in stop cooperation with the stop block 342. In this way, the clamping piece 340 can drive the stop block 342 to move relative to the tool body 310 when the clamping piece 340 is rotated, so as to drive the second support block 82 to move through the stop block 342, so that the adjustment operation is more smooth, and the use efficiency is improved.

[0082] In some embodiments, since the first insertion rod 320 is fixedly connected with the first support block 81, the second insertion rod 330 is fixedly connected with the second support block 82, and the elastic piece 83 is arranged between the first support block 81 and the second support block 82, the second insertion rod 330 is subjected to the elastic force of the elastic piece 83 and abuts against the stop block 342. When the stop block 342 moves relative to the tool body 310, it can drive the second insertion rod 330 to move close to or away from the first insertion rod 320, so as to control the distance between the first support block 81 and the second support block 82. The stop block 342 is a polyhedral block, and the intervertebral prosthesis further includes a pressing tool for rotating the stop block 342, and the pressing tool is provided with a polygonal hole matched with the polyhedral block, and the stop block 342 can be driven to rotate by swinging the pressing tool.

[0083] In other embodiments, the tool body 310 is provided with a guide hole 313, and the second insertion rod 330 is movably arranged in the guide hole 313 and guided by the guide hole 313. Alternatively, the tool body 310 is provided with a third threaded hole 314, and the clamping member 340 includes a threaded rod 341 and a stop block 342 arranged at one end of the threaded rod 341, the threaded rod 341 is threadedly connected with the third threaded hole 314, and the second insertion rod 330 is arranged on the threaded rod 341 and is stopped by the stop block 342. In some embodiments, the use process of the intervertebral prosthesis is as follows: before implantation, the support plate 80 is removed from between the upper end plate 10 and the lower end plate 20, the upper movable plate 12 is in the first retracted position, and the lower movable plate 22 is in the second retracted position. By using the first adjusting tool 100 and the second adjusting tool 200, the distance between the upper end plate 10 and the lower end plate 20 is reduced, so that the overall height of the intervertebral prosthesis is reduced, and the intervertebral prosthesis is placed in the intervertebral space of the human body. By using the first adjusting tool 100 and the second adjusting tool 200, the distance and angle between the upper end plate 10 and the lower end plate 20 are adjusted, so that the intervertebral prosthesis can match the shape of the intervertebral space of the human body, and then the support plate adjusting tool 300 is used to place the support plate 80 between the upper end plate 10 and the lower end plate 20, so that the upper movable plate 12 is switched to the first protruding position, and the lower movable plate 22 is switched to the second protruding position. When the support plate 80 is arranged between the upper end plate 10 and the lower end plate 20, the bone cement is injected into the containing cavity through the injection port 842, and then the closure plug 85 is inserted into the injection port 842, so that the relative position of the first support block 81 and the second support block 82 can be fixed.

[0084] In the description of the present application, it should be understood that "a plurality of" means two or more. The orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0085] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical", "horizontal", and derivatives thereof shall relate to the application as oriented in the drawing. The terms "on", "above", "under", "below" and derivatives thereof shall relate to the application as oriented in the drawing, with the test of "above" and "under" being determined based on the position of the device in the drawing. Where the word "comprise" or variations such as "comprises" or "comprising" are used in the following description, it specifically expressly stated that other elements can also be present. Like reference numerals refer to like elements throughout. The term "coupled" as used herein is intended to mean either a direct connection between two elements or an indirect connection through one or more intervening elements. The term "associated with" as used herein is intended to mean either a direct connection between two elements or an indirect connection through one or more intervening elements.

[0086] In addition, it should be pointed out that the use of "first", "second" and the like words to qualify parts, is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0087] The preferred embodiments of the application are described above in detail. The application can be modified and changed by those skilled in the art without departing from the spirit and principle of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the scope of protection of the application.

Claims

1. An intervertebral prosthesis, characterized in that, The intervertebral prosthesis comprises: an upper end plate (10) comprising an upper end plate frame (11) and an upper movable plate (12) movably arranged in the upper end plate frame (11), the upper movable plate (12) being movable to have a first protruding position protruding from a surface of the upper end plate frame (11) and a first retracted position retracted into the upper end plate frame (11); a lower end plate (20) arranged in spaced relation to the upper end plate (10); an adjusting shaft assembly (30) arranged between the upper end plate (10) and the lower end plate (20), the adjusting shaft assembly (30) comprising an outer shaft (32) and an inner shaft (31) telescopically arranged in the outer shaft (32); a first adjusting member (40) arranged on the inner shaft (31); a first transmission structure (50) connected between the first adjusting member (40) and a first end of the upper end plate (10) and connected between the first adjusting member (40) and a first end of the lower end plate (20); a second adjusting member (60) movably arranged on the outer shaft (32); a second transmission structure (70) connected between the second adjusting member (60) and a second end of the upper end plate (10) and connected between the second adjusting member (60) and a second end of the lower end plate (20); a support plate (80) supported between the lower end plate (20) and the upper movable plate (12) to keep the upper movable plate (12) in the first protruding position.

2. The intervertebral prosthesis according to claim 1, wherein: the inner shaft (31) is provided with a first outer threaded section (311), the outer shaft (32) is provided with a second outer threaded section (321), and the outer shaft (32) is further provided with a first threaded hole (322) penetrating through both ends of the outer shaft (32) along an axial direction of the outer shaft (32), and part of the first outer threaded section (311) extends into the first threaded hole (322) and threadedly cooperates with the first threaded hole (322); the first adjusting member (40) comprises a first connecting ring (41) rotatably sleeved on the inner shaft (31) along a circumferential direction of the inner shaft (31), the first connecting ring (41) is arranged at an end of the inner shaft (31) away from the outer shaft (32), and the first transmission structure (50) is connected with the first connecting ring (41); the second adjusting member (60) comprises a second connecting ring (61) and a cooperating sleeve (62) rotatably arranged on the second connecting ring (61), the cooperating sleeve (62) is provided with a second threaded hole (621), the cooperating sleeve (62) is sleeved on the outer shaft (32) and threadedly cooperates with the second outer threaded section (321), and the second transmission structure (70) is connected with the second connecting ring (61).

3. The intervertebral prosthesis of claim 2, wherein, The end face of the inner shaft (31) extending into the first threaded hole (322) is provided with a first operation hole (312) in communication with the outside of the intervertebral prosthesis; the end of the outer shaft (32) away from the first connecting ring (41) is provided with a second operation hole (3231); the surface of the matching sleeve (62) away from the first connecting ring (41) is provided with a third operation hole (622).

4. The intervertebral prosthesis of claim 3, wherein, The second outer threaded section (321) is provided with a stop ring (323) protruding in the radial direction of the second outer threaded section (321), and the stop ring (323) is located at the end of the second outer threaded section (321) away from the first connecting ring (41); The stop ring (323) is located on the side of the matching sleeve (62) away from the first connecting ring (41) and is in stop cooperation with the matching sleeve (62); and / or, The second operation hole (3231) is provided on the surface of the stop ring (323) away from the first connecting ring (41).

5. The intervertebral prosthesis according to claim 1, wherein The first transmission structure (50) comprises a first connecting rod (51) and a second connecting rod (52), the first end of the first connecting rod (51) is hinged to the first end of the upper end plate (10), the second end of the first connecting rod (51) is hinged to the first adjusting member (40), the first end of the second connecting rod (52) is hinged to the first end of the lower end plate (20), and the second end of the second connecting rod (52) is hinged to the first adjusting member (40); The second transmission structure (70) comprises a third connecting rod (71) and a fourth connecting rod (72), the first end of the third connecting rod (71) is hinged to the second end of the upper end plate (10), the second end of the third connecting rod (71) is hinged to the second adjusting member (60), the first end of the fourth connecting rod (72) is hinged to the second end of the lower end plate (20), and the second end of the fourth connecting rod (72) is hinged to the second adjusting member (60).

6. The intervertebral prosthesis according to claim 5, wherein The first end of the upper end plate (10) is provided with a first hinge shaft, and the first end of the first connecting rod (51) is hinged to the first hinge shaft; the second end of the upper end plate (10) is provided with a second hinge shaft (112), and the first end of the third connecting rod (71) is hinged to the second hinge shaft (112); and / or The first end of the lower end plate (20) is provided with a third hinge shaft (211), and the first end of the second connecting rod (52) is hinged to the third hinge shaft (211); the second end of the lower end plate (20) is provided with a fourth hinge shaft (212), and the first end of the fourth connecting rod (72) is hinged to the fourth hinge shaft (212).

7. The intervertebral prosthesis of claim 1 wherein, The upper movable plate (12) is provided with a first clamping groove, the supporting plate (80) comprises a first supporting block (81), a second supporting block (82) and an elastic member (83) connected between the first supporting block (81) and the second supporting block (82), the first supporting block (81) extends into the first clamping groove and is clamped and matched with the first clamping groove, and the second supporting block (82) is connected with the lower terminal plate (20).

8. The intervertebral prosthesis of claim 7, wherein, The supporting plate (80) further comprises a housing (84), the housing (84) has a first opening (841), the elastic member (83), at least part of the first supporting block (81) and at least part of the second supporting block (82) are arranged in the housing (84), and the first supporting block (81) is telescopically arranged at the first opening (841); The first supporting block (81), the second supporting block (82) and the housing (84) surround a containing cavity, and the housing (84) is provided with an injection opening (842) in communication with the containing cavity.

9. The intervertebral prosthesis of claim 8, wherein, The first supporting block (81) is provided with a first fixing hole (811), the housing (84) is provided with a first long slot hole (843) extending along the floating direction of the first supporting block (81), and the intervertebral prosthesis further comprises a first fastener (91), the first fastener (91) passes through the first long slot hole (843) and extends into the first fixing hole (811) to fixedly connect the first supporting block (81) and the housing (84).

10. The intervertebral prosthesis of claim 9, wherein, The lower terminal plate (20) comprises a lower terminal plate frame (21) and a lower movable plate (22) movably arranged in the lower terminal plate frame (21), the lower movable plate (22) is movable to have a second protruding position protruding from the surface of the lower terminal plate frame (21) and a second retracted position retracted into the lower terminal plate frame (21), the lower movable plate (22) is provided with a second clamping groove (221), the second supporting block (82) extends into the second clamping groove (221) and is clamped and matched with the second clamping groove (221), and the housing (84) further has a second opening, and the second supporting block (82) is telescopically arranged at the second opening; The second supporting block (82) is provided with a second fixing hole (821), the housing (84) is provided with a second long slot hole (844) extending along the floating direction of the second supporting block (82), and the intervertebral prosthesis further comprises a second fastener (92), the second fastener (92) passes through the second long slot hole (844) and extends into the second fixing hole (821) to fixedly connect the second supporting block (82) and the housing (84).

11. An intervertebral prosthetic assembly comprising: The intervertebral prosthesis assembly comprises the intervertebral prosthesis, a first adjusting tool (100) and a second adjusting tool (200), the intervertebral prosthesis is the intervertebral prosthesis of claim 3 or 4, the first adjusting tool (100) is capable of cooperating with the inner shaft (31) and the outer shaft (32) to drive the inner shaft (31) and the outer shaft (32) to rotate relatively; the second adjusting tool (200) is capable of cooperating with the outer shaft (32) and the cooperating sleeve (62) to drive the outer shaft (32) and the cooperating sleeve (62) to rotate relatively.

12. The intervertebral prosthesis assembly of claim 11, wherein, The first adjusting tool (100) comprises a first sleeve (110), a first rotating rod (120) and a first inserting rod (130), the first rotating rod (120) is rotatably and movably arranged in the first sleeve (110) along the axial direction of the first sleeve (110), the first inserting rod (130) is arranged on the first sleeve (110); the first rotating rod (120) is capable of being inserted into the first operating hole (312) and fixedly connected with the inner shaft (31), the first inserting rod (130) is capable of being inserted into the second operating hole (3231) and fixedly connected with the outer shaft (32); and / or, The second adjusting tool (200) comprises a second sleeve (210), a second rotating rod (220), a third inserting rod (230) and a fourth inserting rod (240), the second rotating rod (220) is rotatably and movably arranged in the second sleeve (210) along the axial direction of the second sleeve (210), the third inserting rod (230) is arranged on the second rotating rod (220), the fourth inserting rod (240) is arranged on the second sleeve (210); the third inserting rod (230) is capable of being inserted into the second operating hole (3231) and fixedly connected with the outer shaft (32), the fourth inserting rod (240) is capable of being inserted into the third operating hole (622) and fixedly connected with the cooperating sleeve (62).

13. An intervertebral prosthetic assembly comprising an intervertebral prosthetic and a support plate adjustment tool (300) separably disposed with the intervertebral prosthetic, characterized in that, The intervertebral prosthesis is the intervertebral prosthesis of claim 10, the support plate adjusting tool (300) comprises a tool body (310), a first inserting rod (320), a second inserting rod (330) and a clamping member (340), the first inserting rod (320) is arranged on the tool body (310), the second inserting rod (330) is movably arranged on the tool body (310), the first inserting rod (320) is capable of being inserted into the first fixed hole (811) and fixedly connected with the first support block (81), the second inserting rod (330) is capable of being inserted into the second fixed hole (821) and fixedly connected with the second support block (82), the clamping member (340) is movably arranged on the tool body (310) and drives the second inserting rod (330) to approach the first inserting rod (320).

14. The intervertebral prosthetic assembly of claim 13, wherein: a guide hole (313) is arranged on the tool body (310), and a second insertion rod (330) is movably arranged in and guided by the guide hole (313); and / or a third threaded hole (314) is arranged on the tool body (310), the clamping member (340) comprises a screw rod (341) and a stop block (342) arranged at one end of the screw rod (341), the screw rod (341) is in threaded cooperation with the third threaded hole (314), and the second insertion rod (330) is arranged on the screw rod (341) and in stop cooperation with the stop block (342).

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