Intervertebral prosthesis and intervertebral prosthesis assembly

Abstract

The invention provides an intervertebral prosthesis and an intervertebral prosthesis component, and the intervertebral prosthesis comprises an upper end plate; the lower end plate and the upper end plate are arranged at intervals; the adjusting shaft assembly is arranged between the upper end plate and the lower end plate, and the adjusting shaft assembly comprises an outer shaft and an inner shaft telescopically arranged in the outer shaft; the first adjusting piece is arranged on the inner shaft; the first transmission structure is connected between the first adjusting piece and the first end of the upper end plate and between the first adjusting piece and the first end of the lower end plate; the second adjusting piece is movably arranged on the outer shaft; and the second transmission structure is connected between the second adjusting piece and the second end of the upper end plate and between the second adjusting piece and the second end of the lower end plate. According to the technical scheme, the problems that in the prior art, an intervertebral prosthesis is difficult to be matched with the natural angle of the intervertebral space, and the use stability of the intervertebral prosthesis is reduced are effectively solved.

Description

Technical Field

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

[0002] Intervertebral prostheses are widely used in the medical device field. They are primarily used to treat intervertebral disc lesions or spinal instability caused by spinal degenerative diseases, spinal fractures, spinal tumors, and other conditions. Intervertebral prostheses provide support between the intervertebral spaces, promote intervertebral bone fusion, and maintain normal spinal alignment and stability.

[0003] Intervertebral prostheses in the related art include upper and lower endplates, which adjust the overall height of the intervertebral prosthesis by moving them closer or farther from each other. Because the upper and lower endplates always move in opposite directions, the relative angle between the outer surfaces of the upper and lower endplates remains constant, i.e., the angle between the two surfaces of the intervertebral prosthesis that contact the intervertebral space remains constant.

[0004] The intervertebral spaces in a normal human body vary not only in height but also in angle to accommodate the natural curvature of the spine and the load requirements. Because the angles between the two surfaces of intervertebral prostheses in related technologies that contact the intervertebral space are fixed, it is difficult for the prosthesis to match the natural angle of the intervertebral space. This can easily lead to loosening or displacement of the prosthesis after implantation, reducing its operational stability. Summary of the Invention

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

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, an intervertebral prosthesis is provided, comprising: an upper end plate; a lower end plate spaced apart from the upper end plate; an adjusting shaft assembly disposed between the upper end plate and the lower end plate, the adjusting shaft assembly comprising an outer shaft and an inner shaft telescopically disposed within the outer shaft; a first adjusting member disposed on the inner shaft; a first transmission structure connected between the first adjusting member and the first end of the upper end plate and between the first adjusting member and the first end of the lower end plate; a second adjusting member movably disposed on the outer shaft; and a second transmission structure connected between the second adjusting member and the second end of the upper end plate and between the second adjusting member and the second end of the lower end plate.

[0007] Furthermore, a first external threaded section is provided on the inner shaft, a second external threaded section is provided on the outer shaft, and a first threaded hole is also provided on the outer shaft which passes through both ends of the outer shaft along the axial direction of the outer shaft, and part of the first external threaded section extends into the first threaded hole and is threadedly engaged with the first threaded hole; the first adjusting member includes a first connecting ring which is relatively rotatable on the inner shaft along the circumference of the inner shaft, the first connecting ring is provided at an end of the inner shaft away from the outer shaft, and the first transmission structure is connected to the first connecting ring; the second adjusting member includes a second connecting ring and a mating sleeve rotatably provided on the second connecting ring, a second threaded hole is provided on the mating sleeve, the mating sleeve is sleeved on the outer shaft and threadedly engaged with the second external threaded section, and the second transmission structure is connected to the second connecting ring.

[0008] Furthermore, a first operating hole is provided on the end face of the inner shaft extending into the first threaded hole, and the first operating hole is connected to the outside of the intervertebral prosthesis; a second operating hole is provided on the end of the outer shaft away from the first connecting ring; and a third operating hole is provided on the surface of the matching sleeve away from the first connecting ring.

[0009] Furthermore, a stop ring is provided on the second external thread segment and protrudes radially along the second external thread segment, and 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 mating sleeve away from the first connecting ring and cooperates with the mating sleeve stop; and / or, the second operating hole is provided on the surface of the stop ring away from the first connecting ring.

[0010] Further, the first transmission structure includes a first connecting rod and a second connecting rod, the first end of the first connecting rod is hinged to the first end of the upper end plate, the second end of the first connecting rod is hinged to the first adjusting member, the first end of the second connecting rod is hinged to the first end of the lower end plate, and the second end of the second connecting rod is hinged to the first adjusting member; the second transmission structure includes a third connecting rod and a fourth connecting rod, the first end of the third connecting rod is hinged to the second end of the upper end plate, the second end of the third connecting rod is hinged to the second adjusting member, the first end of the fourth connecting rod is hinged to the second end of the lower end plate, and the second end of the fourth connecting rod is hinged to the second adjusting member.

[0011] Furthermore, a first hinge is provided at the first end of the upper end plate, and the first end of the first connecting rod is hinged to the first hinge; a second hinge is provided at the second end of the upper end plate, and the first end of the third connecting rod is hinged to the second hinge; and / or, a third hinge is provided at the first end of the lower end plate, and the first end of the second connecting rod is hinged to the third hinge; and a fourth hinge is provided at the second end of the lower end plate, and the first end of the fourth connecting rod is hinged to the fourth hinge.

[0012] Furthermore, the upper end plate includes an upper end plate frame and an upper movable plate movably arranged in the upper end plate frame, the upper movable plate is movable to have a first protruding position protruding from the surface of the upper end plate frame and a first retracted position retracted into the upper end plate frame; the intervertebral prosthesis also includes a support plate, the support plate is supported between the lower end plate and the upper movable plate so that the upper movable plate remains in the first protruding position.

[0013] Furthermore, a first card slot is provided on the upper movable plate, and the support plate includes 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 card slot and engages with the first card slot, and the second support block is connected to the lower end plate.

[0014] Furthermore, the support plate also includes a shell, the shell 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 all arranged in the shell, and the first support block is telescopically arranged at the first opening; the first support block, the second support block and the shell form an accommodating cavity, and the shell is provided with an injection port connected to the accommodating cavity.

[0015] Furthermore, a first fixing hole is provided on the first support block, and a first elongated hole extending along the floating direction of the first support block is provided on the shell. The intervertebral prosthesis also includes a first fastener, which passes through the first elongated hole and extends into the first fixing hole to fix the first support block to the shell.

[0016] Furthermore, the lower end plate includes a lower end plate frame and a lower movable plate movably arranged in the lower end plate frame, the lower movable plate is movable to have a second protruding position protruding from the surface of the lower end plate frame and a second retracted position retracted to the lower end plate frame; a second card slot is provided on the lower movable plate, the second support block extends into the second card slot and engages with the second card slot; the shell also has a second opening, and the second support block is telescopically arranged at the second opening; a second fixing hole is provided on the second support block, and a second elongated hole extending along the floating direction of the second support block is provided on the shell, and the intervertebral prosthesis also includes a second fastener, the second fastener passes through the second elongated hole and extends into the second fixing hole to fix the second support block to the shell.

[0017] According to another aspect of the present invention, an intervertebral prosthesis assembly is provided, which includes an intervertebral prosthesis, a first adjustment tool and a second adjustment tool. The intervertebral prosthesis is the above-mentioned intervertebral prosthesis. The first adjustment tool can cooperate with the inner shaft and the outer shaft to drive the inner shaft and the outer shaft to rotate relative to each other; the second adjustment tool can cooperate with the outer shaft and the mating sleeve to drive the outer shaft and the mating sleeve to rotate relative to each other.

[0018] Further, the first adjusting tool includes a first sleeve, a first rotating rod and a first insertion rod, the first rotating rod is rotatable and movably arranged in the first sleeve along the axial direction of the first sleeve, and the first insertion rod is arranged on the first sleeve; the first rotating rod can be inserted into the first operating hole and fixedly connected to the inner shaft, and the first insertion rod can be inserted into the second operating hole and fixedly connected to the outer shaft; and / or, the second adjusting tool includes a second sleeve, a second rotating rod, a third insertion rod and a fourth insertion rod, the second rotating rod is rotatable and movably arranged in the second sleeve along the axial direction of the second sleeve, the third insertion rod is arranged on the second rotating rod, and the fourth insertion rod is arranged on the second sleeve; the third insertion rod can be inserted into the second operating hole and fixedly connected to the outer shaft, and the fourth insertion rod can be inserted into the third operating hole and fixedly connected to the mating sleeve.

[0019] According to another aspect of the present invention, an intervertebral prosthesis assembly is provided, comprising an intervertebral prosthesis and a support plate adjustment tool detachable from the intervertebral prosthesis, the intervertebral prosthesis being the above-mentioned intervertebral prosthesis, the support plate adjustment tool comprising a tool body, a first plug-in rod, a second plug-in rod and a clamping member, the first plug-in rod being arranged on the tool body, the second plug-in rod being movably arranged on the tool body, the first plug-in rod being capable of being inserted into the first fixing hole and fixedly connected to the first support block, the second plug-in rod being capable of being inserted into the second fixing hole and fixedly connected to the second support block, the clamping member being movably arranged on the tool body and driving the second plug-in rod close to the first plug-in rod.

[0020] Furthermore, a guide hole is provided on the tool body, and the second plug-in rod is movably arranged in the guide hole and cooperates with the guide of the guide hole; and / or, a third threaded hole is provided on the tool body, the clamping part includes a screw and a stop block provided at one end of the screw, the screw is threadedly engaged with the third threaded hole, the second plug-in rod is passed through the screw, and the second plug-in rod is engaged with the stop block.

[0021] Applying the technical solution of the present invention, the intervertebral prosthesis includes: an upper end plate, a lower end plate, an adjustment shaft assembly, a first adjustment member, a first transmission structure, a second adjustment member and a second transmission structure. The lower end plate and the upper end plate are spaced apart. The adjustment shaft assembly is arranged between the upper end plate and the lower end plate, and the adjustment shaft assembly includes an outer shaft and an inner shaft telescopically arranged inside the outer shaft. The first adjustment member is arranged on the inner shaft. The first transmission structure is connected between the first adjustment member and the first end of the upper end plate and between the first adjustment member and the first end of the lower end plate. The second adjustment member is movably arranged on the outer shaft. The second transmission structure is connected between the second adjustment member and the second end of the upper end plate and between the second adjustment member and the second end of the lower end plate. In this way, by telescopically arranging the inner shaft in the adjustment shaft assembly inside the outer shaft, the inner shaft can move relative to the outer shaft. When the inner shaft telescopes relative to the outer shaft, the inner shaft drives the first adjusting member to move. The movement of the first adjusting member drives the first end of the upper endplate and the first end of the lower endplate toward or away from each other via the first transmission structure, thereby converting the telescopic movement of the inner shaft into an angle adjustment between the first end of the upper endplate and the first end of the lower endplate. A second adjusting member is movably disposed on the outer shaft, so that when the second adjusting member moves relative to the outer shaft, the second adjusting member drives the second end of the upper endplate and the second end of the lower endplate toward or away from each other via the second transmission structure, thereby converting the movement of the second adjusting member into an angle adjustment between the second end of the upper endplate and the second end of the lower endplate. This arrangement allows for independent adjustment of the angle between the two surfaces of the intervertebral prosthesis that contact the intervertebral space, enabling adjustment of the relative angle between the upper and lower endplates, ensuring that the intervertebral prosthesis better matches the natural physiological curvature of the intervertebral space, ensuring a tighter fit between the intervertebral prosthesis and the intervertebral space, reducing the risk of loosening or displacement of the intervertebral prosthesis after implantation, and improving the stability of the intervertebral prosthesis. Therefore, the technical solution of the present application effectively solves the problem in the related art that the intervertebral prosthesis is difficult to match the natural angle of the intervertebral space, thereby reducing the stability of the intervertebral prosthesis in use. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0024] Figure 2 Shown Figure 1 Schematic diagram of the partially exploded structure of the intervertebral prosthesis;

[0025] Figure 3 Shown Figure 1Schematic diagram of the three-dimensional structure of the support plate of the intervertebral prosthesis;

[0026] Figure 4 Shown Figure 1 Schematic diagram of the exploded structure of the support plate of the intervertebral prosthesis;

[0027] Figure 5 Shown Figure 1 A schematic diagram of a partially exploded structure of an intervertebral prosthesis without showing the support plate;

[0028] Figure 6 Shown Figure 5 A schematic diagram of an exploded structure of an intervertebral prosthesis without showing the upper end plate and the lower end plate;

[0029] Figure 7 A schematic diagram of the three-dimensional structure of an intervertebral prosthesis according to an embodiment of the intervertebral prosthesis assembly of the present invention when it cooperates with a first adjustment tool;

[0030] Figure 8 Shown Figure 7 A schematic diagram of an exploded structure of a first adjustment tool of an intervertebral prosthesis assembly;

[0031] Figure 9 A schematic diagram of the three-dimensional structure of an intervertebral prosthesis according to an embodiment of the intervertebral prosthesis assembly of the present invention when it cooperates with a second adjustment tool is shown;

[0032] Figure 10 Shown Figure 9 A schematic diagram of the exploded structure of the second adjustment tool of the intervertebral prosthesis assembly;

[0033] Figure 11 A schematic diagram of the three-dimensional structure of an intervertebral prosthesis and a support plate adjustment tool according to an embodiment of the intervertebral prosthesis assembly of the present invention is shown;

[0034] Figure 12 Shown Figure 11 A schematic diagram of the three-dimensional structure of a support plate adjustment tool of an intervertebral prosthesis assembly;

[0035] Figure 13 Shown Figure 11 Schematic diagram of the exploded structure of the support plate adjustment tool of the intervertebral prosthesis assembly.

[0036] The above drawings include the following reference numerals:

[0037] 10. Upper end plate; 11. Upper end plate frame; 112. Second hinge shaft; 12. Upper movable plate;

[0038] 20. Lower end plate; 21. Lower end plate frame; 211. Third hinge shaft; 212. Fourth hinge shaft; 22. Lower movable plate; 221. Second slot;

[0039] 30. Adjusting shaft assembly; 31. Inner shaft; 311. First externally threaded section; 312. First operating hole; 32. Outer shaft; 321. Second externally threaded section; 322. First threaded hole; 323. Stop ring; 3231. Second operating 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 operating hole;

[0043] 70. Second transmission structure; 71. Third connecting rod; 72. Fourth connecting rod;

[0044] 80. Support plate; 81. First support block; 811. First fixing hole; 82. Second support block; 821. Second fixing hole; 83. Elastic member; 84. Housing; 841. First opening; 842. Inlet; 843. First elongated hole; 844. Second elongated hole; 85. Closing plug;

[0045] 91. First fastener; 92. Second fastener;

[0046] 100, first adjustment tool; 110, first sleeve; 120, first rotating rod; 130, first insertion rod;

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

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

[0049] The following will be combined with the accompanying 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 embodiments described 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 in no way 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 making creative efforts are within the scope of protection of the present invention.

[0050] 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, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, 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 actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods 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 the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

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

[0053] In this manner, by telescopically disposing the inner shaft 31 of the adjustment shaft assembly 30 within the outer shaft 32, the inner shaft 31 is capable of moving relative to the outer shaft 32. When the inner shaft 31 telescopes relative to the outer shaft 32, the inner shaft 31 drives the first adjustment member 40 to move. The movement of the first adjustment member 40 drives the first end of the upper end plate 10 and the first end of the lower end plate 20 toward or away from each other via the first transmission structure 50, thereby converting the telescopic movement of the inner shaft 31 into an angle adjustment between the first end of the upper end plate 10 and the first end of the lower end plate 20. By movably disposing the second adjustment member 60 on the outer shaft 32, when the second adjustment member 60 moves relative to the outer shaft 32, the second adjustment member 60 drives the second end of the upper end plate 10 and the second end of the lower end plate 20 toward or away from each other via the second transmission structure 70, thereby converting the movement of the second adjustment member 60 into an angle adjustment between the second end of the upper end plate 10 and the second end of the lower end plate 20. The above arrangement allows for independent adjustment of the angle between the two surfaces of the intervertebral prosthesis that contact the intervertebral space, enabling adjustment of the relative angle between the upper endplate 10 and the lower endplate 20. This ensures that the intervertebral prosthesis better matches the natural physiological curvature of the intervertebral space, resulting in a closer fit between the intervertebral prosthesis and the intervertebral space, reducing the risk of loosening or displacement of the intervertebral prosthesis after implantation and improving the stability of the intervertebral prosthesis. Therefore, the technical solution of this embodiment effectively solves the problem in related technologies where intervertebral prostheses have difficulty matching the natural angle of the intervertebral space, which reduces the stability of the intervertebral prosthesis.

[0054] In addition, the inventors found that another intervertebral prosthesis in the related art includes an upper end plate and a lower end plate that are fixedly connected. It is usually necessary to confirm the model specifications of the applicable intervertebral prosthesis based on the parameters of the intervertebral space. The intervertebral prosthesis with corresponding parameters is customized. During implantation, the intervertebral prosthesis needs to be implanted into the predetermined position by knocking with an implantation tool. This implantation operation may cause damage to the human vertebral body.

[0055] Using the technical solution of the above embodiment, the inner shaft 31 can be extended and retracted to move the first end of the upper endplate 10 and the first end of the lower endplate 20 closer together. The second adjustment member 60 can be moved on the outer shaft 32 to move the second end of the upper endplate 10 and the second end of the lower endplate 20 closer together, thereby reducing the overall height of the intervertebral prosthesis, thereby facilitating implantation of the intervertebral prosthesis into the intervertebral space, thereby avoiding the need for percussive implantation as in related art and reducing damage to the human vertebral body. Furthermore, after implantation, the inner shaft 31 can be driven to extend and retract relative to the outer shaft 32 to move the first end of the upper endplate 10 and the first end of the lower endplate 20 away from each other. The second adjustment member 60 can be moved on the outer shaft 32 to move the second end of the upper endplate 10 and the second end of the lower endplate 20 away from each other, thereby increasing the overall height of the intervertebral prosthesis, thereby facilitating support of the intervertebral space by the intervertebral prosthesis and improving the stability of the intervertebral prosthesis during use.

[0056] like Figure 5 and Figure 6As shown, the inner shaft 31 is provided with a first externally threaded section 311, and the outer shaft 32 is provided with a second externally threaded section 321. The outer shaft 32 is also provided with a first threaded hole 322 extending through both ends of the outer shaft 32 along the axis of the outer shaft 32. A portion of the first externally threaded section 311 extends into the first threaded hole 322 and is threadedly engaged with the first threaded hole 322. The first adjusting member 40 includes a first connecting ring 41 that is rotatably mounted on the inner shaft 31 along the circumference of the inner shaft 31. The first connecting ring 41 is disposed at an end of the inner shaft 31 away from the outer shaft 32. The first transmission structure 50 is connected to the first connecting ring 41. The second adjusting member 60 includes a second connecting ring 61 and a mating sleeve 62 that is rotatably mounted on the second connecting ring 61. The mating sleeve 62 is provided with a second threaded hole 621. The mating sleeve 62 is mounted on the outer shaft 32 and is threadedly engaged with the second externally threaded section 321. The second transmission structure 70 is connected to the second connecting ring 61. The first threaded hole 322 extends through both ends of the outer shaft 32 along the axis of the outer shaft 32, allowing a user to rotate the inner shaft 31 relative to the outer shaft 32 from both ends of the inner shaft 31, thereby facilitating adjustment. Furthermore, the provision of the first threaded hole 322 extending through both ends of the outer shaft 32 allows a user to both rotate the inner shaft 31 relative to the outer shaft 32 and move the second adjustment member 60 relative to the outer shaft 32 from the same side. This facilitates adjustment of the intervertebral prosthesis after implantation, allowing both the inner shaft 31 and the second adjustment member 60 to be operated from the same side. By providing the first externally threaded segment 311 on the inner shaft 31 and the first threaded hole 322 on the outer shaft 32, the inner shaft 31 can be moved along the axis of the outer shaft 32 when rotating relative to the outer shaft 32, thereby driving movement of the first adjustment member 40. By providing the second externally threaded section 321 on the outer shaft 32 and the second threaded hole 621 on the mating sleeve 62, the mating sleeve 62 can move along the axis of the outer shaft 32 when rotating relative to the outer shaft 32, thereby driving the second connecting ring 61 to move along the axis of the outer shaft 32, thereby driving the second end of the upper end plate 10 and the second end of the lower end plate 20 toward or away from each other through the second transmission structure 70. Furthermore, the mating sleeve 62 is rotatably disposed on the second connecting ring 61, so that when the mating sleeve 62 rotates, the second connecting ring 61 can maintain its state of movement along the axis of the outer shaft 32, thereby making the movement of the second connecting ring 61 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 more stable and reliable.

[0057] In some embodiments, the first connecting ring 41 is fixed relative to the inner shaft 31 along the axis of the inner shaft 31. That is, the first connecting ring 41 rotates only 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 diameter-reduced section, and the first connecting ring 41 is provided with a first through-hole. The first through-hole is positioned outside the first diameter-reduced section to enable the first connecting ring 41 to rotate relative to the inner shaft 31. The mating sleeve 62 is provided with a second diameter-reduced section, and the second connecting ring 61 is provided with a second through-hole. The second through-hole is positioned outside the second diameter-reduced section to enable the mating sleeve 62 to rotate relative to the second connecting ring 61.

[0058] like Figure 5 As shown, a first operating hole 312 is provided on the end surface of the inner shaft 31 that extends into the first threaded hole 322. The first operating hole 312 communicates with the exterior of the intervertebral prosthesis. A second operating hole 3231 is provided on the end of the outer shaft 32 that is distal to the first connecting ring 41. A third operating hole 622 is provided on the surface of the mating sleeve 62 that is distal to the first connecting ring 41. The provision of the first operating hole 312 facilitates the user to secure the inner shaft 31 with a tool, thereby facilitating adjustment of the inner shaft 31. The provision of the first operating hole 312 communicating with the exterior of the intervertebral prosthesis facilitates the user's actuation of the inner shaft 31. The provision of the second operating hole 3231 facilitates the user to secure the outer shaft 32 with a tool, thereby facilitating adjustment of the outer shaft 32. The provision of the third operating hole 622 facilitates the user to secure the mating sleeve 62 with a tool, thereby facilitating adjustment of the mating sleeve 62. Furthermore, through the above arrangement, the first operating hole 312, the second operating hole 3231 and the third operating hole 622 are all located at the same end of the intervertebral prosthesis, further facilitating the adjustment operation by the user.

[0059] In some embodiments, as Figure 5 As shown, in a projection plane perpendicular to the axis of the outer shaft 32, the third operating hole 622 is located outside the second operating hole 3231, and the second operating hole 3231 is located outside the first operating hole 312. Furthermore, there are multiple third operating holes 622 spaced apart along the circumference of the outer shaft 32, multiple second operating holes 3231 spaced apart along the circumference of the outer shaft 32, and only one first operating hole 312.

[0060] like Figure 5 and Figure 6As shown, the second externally threaded segment 321 is provided with a stop ring 323 that protrudes radially along the second externally threaded segment 321. The stop ring 323 is located at the end of the second externally threaded segment 321 that is distal to the first connecting ring 41. The stop ring 323 is located on the side of the mating sleeve 62 that is distal to the first connecting ring 41 and engages with the mating sleeve 62 for a stop. A second operating hole 3231 is provided on the surface of the stop ring 323 that is distal to the first connecting ring 41. The engagement of the stop ring 323 with the mating sleeve 62 limits the maximum range of movement of the second adjusting member 60 during adjustment, ensuring more reliable movement of the mating sleeve 62 on the outer shaft 32, preventing dislodgement of the structure due to over-adjustment, and ensuring the safety and reliability of the intervertebral prosthesis implantation procedure. Furthermore, positioning the second operating hole 3231 on the stop ring 323 facilitates machining and increases the area where the second operating hole 3231 is provided, facilitating alignment when using the tool.

[0061] In other embodiments, the second externally threaded segment 321 is provided with a stop ring 323 that protrudes radially from the second externally threaded segment 321. The stop ring 323 is located at the end of the second externally threaded segment 321 that is distal to the first connecting ring 41. The stop ring 323 is located on the side of the mating sleeve 62 that is distal to the first connecting ring 41 and engages with the mating sleeve 62 for a stop. Alternatively, the second operating hole 3231 is provided on the surface of the stop ring 323 that is distal to the first connecting ring 41.

[0062] like Figure 2 、 Figure 5 and Figure 6As shown, the first transmission structure 50 includes 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 adjustment 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 adjustment member 40. The second transmission structure 70 includes 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 adjustment 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 adjustment member 60. The first transmission structure 50 and the second transmission structure 70 are articulated with the upper endplate 10 and the lower endplate 20 via the first connecting rod 51, the second connecting rod 52, the third connecting rod 71, and the fourth connecting rod 72, respectively. This ensures flexibility and reliability in angle adjustment of the upper and lower endplates 10, 20, allowing them to be precisely adjusted to accommodate the natural physiological curvature of the intervertebral disc. Furthermore, the first and second transmission structures 50, 70 are simple in structure and easy to manufacture. When the first adjusting member 40 moves on the inner shaft 31, it drives the second end of the first connecting rod 51 to move, causing the first connecting rod 51 to swing, thereby moving the first end of the upper endplate 10, which is hinged to the first end of the first connecting rod 51, closer to or farther from the first end of the lower endplate 20. The linkage relationship between the first adjusting member 40 and the second connecting rod 52 refers to the linkage relationship between the first adjusting member 40 and the first connecting rod 51 described above. 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 move closer 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 refers to the linkage relationship between the second adjusting member 60 and the third connecting rod 71 described above.

[0063] In an embodiment not shown, the first transmission structure includes a first conical surface provided on the first end of the upper end plate and a second conical surface provided on the first end of the lower end plate, and the first adjusting member is provided between the first conical surface and the second conical surface. When the first adjusting member moves, the first adjusting member abuts against both the first conical surface and the second conical 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 includes a third conical surface provided on the second end of the upper end plate and a fourth conical surface provided on the second end of the lower end plate, and the second adjusting member is provided between the third conical surface and the fourth conical surface. When the second adjusting member moves on the outer shaft, the second adjusting member abuts against both the third conical surface and the fourth conical 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] like Figure 1 、 Figure 2 and Figure 5 As shown, the first end of the upper end plate 10 is provided with a first hinge, and the first end of the first connecting rod 51 is hinged to the first hinge. The second end of the upper end plate 10 is provided with a second hinge 112, and the first end of the third connecting rod 71 is hinged to the second hinge 112. The first end of the lower end plate 20 is provided with a third hinge 211, and the first end of the second connecting rod 52 is hinged to the third hinge 211. The second end of the lower end plate 20 is provided with a fourth hinge 212, and the first end of the fourth connecting rod 72 is hinged to the fourth hinge 212. The arrangement of the first hinge, the second hinge 112, the third hinge 211, and the fourth hinge 212 on the upper end plate 10 and the lower end plate 20 provides precise hinge points for the first connecting rod 51, the second connecting rod 52, the third connecting rod 71, and the fourth connecting rod 72, ensuring stability and reliability during the adjustment process, reducing the risk of loosening or displacement of the prosthesis after implantation, and improving its stability during use.

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

[0066] like Figure 2 and Figure 5 As shown, the upper end plate 10 includes an upper end plate frame 11 and an upper movable plate 12 movably disposed in the upper end plate frame 11, the upper movable plate 12 being movable to have a first protruding position protruding from 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 also includes a support plate 80, which is supported between the lower end plate 20 and the upper movable plate 12 to maintain 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 and reducing the interference between the upper movable plate 12 and the human vertebral body during implantation, thereby reducing damage to the human vertebral body and making the implantation smoother. After the intervertebral prosthesis is implanted, the support plate 80 is supported between the lower end plate 20 and the upper movable plate 12 so that the upper movable plate 12 is maintained in the first protruding position protruding from the surface of the upper end plate frame 11, so as to increase the contact area between the upper end plate 10 and the human vertebral body, facilitate bone ingrowth, improve the stability after implantation, ensure that the intervertebral prosthesis can better maintain the spinal sequence and stability after implantation, and reduce postoperative complications.

[0067] like Figure 2 and Figure 5 As shown, a first card slot is provided on the upper movable plate 12, and the support plate 80 includes 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 card slot and engages with the first card slot, and the second support block 82 is connected to the lower end plate 20. The provision of the elastic member 83 makes the distance between the first support block 81 and the second support block 82 adjustable, facilitating the operation of placing the support plate 80 between the upper end plate 10 and the lower end plate 20. The provision of the first card slot facilitates the connection between the first support block 81 and the upper movable plate 12, making the connection between the support plate 80 and the upper movable plate 12 more stable and reliable.

[0068] In some embodiments, a plurality of elastic members 83 are spaced apart to enable the first support block 81 to match the tilt angle of the upper end plate 10, thereby better supporting the upper end plate 10. The elastic member 83 is preferably a spring.

[0069] like Figure 3 and Figure 4 As shown, support plate 80 further includes a housing 84 having a first opening 841. The elastic member 83, at least a portion of the first support block 81, and at least a portion of the second support block 82 are disposed within the housing 84. The first support block 81 is retractably disposed within the first opening 841. The first support block 81, the second support block 82, and the housing 84 form a receiving cavity. The housing 84 is provided with an injection port 842 that communicates with the receiving cavity. The provision of the housing 84 not only protects the first support block 81, the second support block 82, and the elastic member 83 within, but also facilitates the formation of the receiving cavity. When the support plate 80 is set between the upper end plate 10 and the lower end plate 20, bone cement is injected into the accommodating cavity through the injection port 842, so that the relative positions of the first support block 81 and the second support block 82 can be fixed, thereby enhancing the structural strength of the support plate 80, so that the support plate 80 can be more reliably supported between the upper end plate 10 and the lower end plate 20, thereby improving the structural strength of the intervertebral prosthesis and enabling the upper movable plate 12 to be more reliably maintained in the first protruding position.

[0070] In some embodiments, the intervertebral prosthesis further comprises a closure plug 85 sealably disposed at the injection port 842. The injection port 842 and the closure plug 85 are threadedly engaged to improve the sealing effect.

[0071] like 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 securely connect the first support block 81 to the housing 84. The first fastener 91 passes through the first elongated hole 843 in the housing 84 and cooperates with the first fixing hole 811 in the first support block 81 to secure the position of the first support block 81, allowing the upper movable plate 12 to remain in the first protruding position. Furthermore, the provision of the first elongated hole 843 allows the position of the first support block 81 when securely connected to the housing 84 to be adjusted, thereby 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 into the lower endplate frame 21. The lower movable plate 22 is provided with a second retaining groove 221, and the second support block 82 extends into the second retaining groove 221 and engages with the second retaining groove 221. The housing 84 also has a second opening, and the second support block 82 is telescopically disposed at the second opening. The second support block 82 is provided with a second fixing hole 821, and the housing 84 is provided with a second elongated hole 844 extending in the floating direction of the second support block 82. 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 to securely connect the second support block 82 to the housing 84. The movable setting of the lower movable plate 22 enables the lower movable plate 22 to move between a second protruding position and a second retracted position. Combined with the use of the second fastener 92, it can ensure that the lower movable plate 22 is stably maintained in the optimal position, reducing damage to the human vertebral body during implantation, improving the supporting capacity of the human vertebral body after implantation, strengthening the fit between the intervertebral prosthesis and the human vertebral body, improving overall stability, promoting bone fusion, and reducing the risk of loosening.

[0073] In some embodiments, the first and second hinges 112 are disposed on the upper endplate frame 11, while the third and fourth hinges 211 and 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 utilize a rough trabecular bone 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 fabricated using 3D printing or conventional subtractive manufacturing techniques, and are made of medical-grade metal materials such as titanium alloys and tantalum. Anodizing the surface can introduce ions such as Ca, Mn, Cu, Ag, Zn, Mg, and P, further enhancing the intervertebral prosthesis's osteogenic properties and imparting antibacterial properties.

[0075] The inventors have discovered that the intervertebral fusion prostheses used in related technologies are mostly made of titanium alloy and PEEK. Since these materials are biologically inert, they cannot promote bone tissue growth, nor can they form a good biological bone bond with human bone tissue. The precipitation of metal ions can also pose a hidden danger to the safety and effectiveness of the prosthesis. Bacterial infection of the prosthesis can also affect the clinical application effect. By applying the above-mentioned embodiment, by surface treating the intervertebral prosthesis, ions with osteogenesis-promoting and antibacterial properties can be introduced, thereby improving the corrosion resistance of the prosthesis, enhancing its biological activity, thereby promoting osteogenesis and antibacterial properties, and improving the clinical application effect of the prosthesis.

[0076] In some embodiments, the upper movable plate 12 includes a first plate body and two second plates respectively arranged at the two side edges of the first plate body, wherein the thickness of the first plate body is greater than that of the second plate body. A third opening is provided on the surface of the upper end plate frame 11 facing away from the lower end plate 20, and a fourth opening is provided on the two side surfaces of the upper end plate frame 11, respectively. The second plates are arranged in a one-to-one correspondence with the fourth openings, and each second plate body is at least partially located within each fourth opening. When the upper movable plate 12 is in the first retracted position, the surface of the first plate body facing away from the lower end plate 20 is flush with or lower than the third opening. When the upper movable plate 12 is in the first protruding position, the surface of the first plate body facing away from 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 cooperate with the fourth opening guides 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] The present application also provides an intervertebral prosthesis assembly, such as Figures 7 to 10As shown, the intervertebral prosthesis assembly includes an intervertebral prosthesis, a first adjustment tool 100, and a second adjustment tool 200. The intervertebral prosthesis is the intervertebral prosthesis described above. The first adjustment tool 100 is capable of cooperating with the inner shaft 31 and the outer shaft 32 to drive relative rotation between the inner and outer shafts 31 and 32. The second adjustment tool 200 is capable of cooperating with the outer shaft 32 and the mating sleeve 62 to drive relative rotation between the outer shaft 32 and the mating sleeve 62. Because the above-described intervertebral prosthesis can address the problem of intervertebral prostheses in related technologies having difficulty matching the natural angle of the intervertebral space, which reduces the stability of the intervertebral prosthesis during use, an intervertebral prosthesis assembly including this intervertebral prosthesis can address the same technical problem. Furthermore, through the cooperation of the first adjustment tool 100 and the second adjustment tool 200, the intervertebral prosthesis assembly achieves precise adjustment of the height and angle of the intervertebral prosthesis. This comprehensive adjustment capability ensures that the intervertebral prosthesis can adapt to the complex structure of the human intervertebral space, improves the degree of fit and stability after implantation, and enhances the convenience and flexibility of intervertebral prosthesis operation.

[0078] like Figures 7 to 10As shown, the first adjustment tool 100 includes a first sleeve 110, a first rotating rod 120, and a first insertion rod 130. The first rotating rod 120 is rotatably and movably disposed within the first sleeve 110 along the axis of the first sleeve 110. The first insertion rod 130 is disposed on the first sleeve 110. The first rotating rod 120 can be inserted into the first operating hole 312 and fixedly connected to the inner shaft 31. The first insertion rod 130 can be inserted into the second operating hole 3231 and fixedly connected to the outer shaft 32. Through the setting of the first adjustment tool 100, the user can insert the first insertion rod 130 into the second operating hole 3231 and fixedly connect it to the outer shaft 32, insert the first rotating rod 120 into the first operating hole 312 and fixedly connect it to the inner shaft 31, and by driving the first rotating shaft to rotate relative to the first sleeve 110, the inner shaft 31 can be driven to rotate relative to the outer shaft 32. Due to the matching relationship between the first threaded hole 322 of the inner shaft 31 and 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 adjustment tool 200 includes a second sleeve 210, a second rotating rod 220, a third insertion rod 230, and a fourth insertion rod 240. The second rotating rod 220 is rotatably and movably disposed within the second sleeve 210 along the axis of the second sleeve 210. The third insertion rod 230 is disposed on the second rotating rod 220, and the fourth insertion rod 240 is disposed on the second sleeve 210. The third insertion rod 230 can be inserted into the second operating hole 3231 and fixedly connected to the outer shaft 32. The fourth insertion rod 240 can be inserted into the third operating hole 622 and fixedly connected to the mating sleeve 62. Through the provision of the second adjustment tool 200, the user can insert the third insertion rod 230 into the second operating hole 3231 and fixedly connect it to the outer shaft 32, insert the fourth insertion rod 240 into the third operating hole 622 and fixedly connect it to the matching sleeve 62, and by driving the second rotating rod 220 to rotate relative to the second sleeve 210, the matching sleeve 62 can be driven to move on the outer shaft 32, so that the matching sleeve 62 can 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 adjustment tool 100 includes a first sleeve 110, a first rotating rod 120, and a first insertion rod 130. The first rotating rod 120 is rotatably and movably disposed within the first sleeve 110 along the axis of the first sleeve 110, and the first insertion rod 130 is disposed on the first sleeve 110. The first rotating rod 120 can be inserted into the first operating hole 312 and fixedly connected to the inner shaft 31, and the first insertion rod 130 can be inserted into the second operating hole 3231 and fixedly connected to the outer shaft 32. Alternatively, the second adjustment tool 200 includes a second sleeve 210, a second rotating rod 220, a third insertion rod 230, and a fourth insertion rod 240. The second rotating rod 220 is rotatably and movably disposed within the second sleeve 210 along the axis of the second sleeve 210, the third insertion rod 230 is disposed on the second rotating rod 220, and the fourth insertion rod 240 is disposed on the second sleeve 210. The third insertion rod 230 can be inserted into the second operating hole 3231 and fixedly connected to the outer shaft 32 , and the fourth insertion rod 240 can be inserted into the third operating hole 622 and fixedly connected to 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 includes an intervertebral prosthesis and a support plate adjustment tool 300 detachably mounted therefrom. The intervertebral prosthesis is the aforementioned intervertebral prosthesis. Because the aforementioned intervertebral prosthesis can address the problem of intervertebral prostheses in related art, which have difficulty matching the natural angle of the intervertebral space and thus reduce the stability of the intervertebral prosthesis, an intervertebral prosthesis assembly incorporating this intervertebral prosthesis can address the same technical issues. The support plate adjustment tool 300 includes a tool body 310, a first connecting rod 320, a second connecting rod 330, and a clamping member 340. The first plug rod 320 is disposed on the tool body 310, and the second plug rod 330 is movably disposed on the tool body 310. The first plug rod 320 can be inserted into the first fixing hole 811 and fixedly connected to the first support block 81, and the second plug rod 330 can be inserted into the second fixing hole 821 and fixedly connected to the second support block 82. The clamping member 340 is movably disposed on the tool body 310 and drives the second plug rod 330 toward the first plug rod 320. The design of the support plate adjustment tool 300 enables efficient adjustment of the support plate 80. The user can insert the first plug rod 320 into the first fixing hole 811 and fix it to the first support block 81, and insert the second plug rod 330 into the second fixing hole 821 and fix it to 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, and the clamping member 340 is controlled to drive the second connecting rod 330 toward the first connecting rod 320, so that the first support block 81 can be close to the second support block 82, facilitating the placement 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 adjustment tool 300 is separated from the support plate 80, allowing the elastic member 83 of the support plate 80 to 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 smoother and improves the efficiency of the operation.

[0081] like Figures 11 to 13As shown, the tool body 310 is provided with a guide hole 313, and the second plug rod 330 is movably disposed in the guide hole 313 and is guided by the guide hole 313. The provision of the guide hole 313 facilitates the control of the movement direction of the second plug rod 330, making the movement of the second plug rod 330 more stable and reliable, thereby making the adjustment operation of the first support block 81 and the second support block 82 more controllable. The tool body 310 is provided with a third threaded hole 314, and the clamping member 340 includes a screw rod 341 and a stop block 342 disposed at one end of the screw rod 341. The screw rod 341 is threadedly engaged with the third threaded hole 314. The second plug rod 330 is inserted into the screw rod 341 and is stopped by the stop block 342. In this way, the clamping member 340 can drive the stop block 342 to move telescopically relative to the tool body 310 when rotating, thereby driving the second support block 82 to move through the stop block 342, making the adjustment operation smoother and improving the use efficiency.

[0082] In some embodiments, the first connecting rod 320 is fixedly connected to the first support block 81, the second connecting rod 330 is fixedly connected to the second support block 82, and an elastic member 83 is disposed between the first support block 81 and the second support block 82. This allows the second connecting rod 330 to be subjected to the elastic force of the elastic member 83 and to abut against the stop block 342. When the stop block 342 telescopically moves within the tool body 310, it can drive the second connecting rod 330 toward or away from the first connecting rod 320, thereby controlling 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 also includes a pressurizing tool for rotating the stop block 342. The pressurizing tool is provided with a polygonal hole that mates with the polyhedral block, and the stop block 342 can be driven to rotate by swinging the pressurizing tool.

[0083] In other embodiments, the tool body 310 is provided with a guide hole 313, and the second insertion rod 330 is movably disposed within and engaged with the guide hole 313. Alternatively, the tool body 310 is provided with a third threaded hole 314, and the clamping member 340 includes a screw 341 and a stopper 342 disposed at one end of the screw 341. The screw 341 is threadedly engaged with the third threaded hole 314, and the second insertion rod 330 is passed through the screw 341 and engaged with the stopper 342. In some embodiments, the intervertebral prosthesis is used as follows: before implantation, the support plate 80 is removed from between the upper endplate 10 and the lower endplate 20, so that the upper movable plate 12 is in a first retracted position and the lower movable plate 22 is in a second retracted position. By using the first adjustment tool 100 and the second adjustment tool 200, the distance between the upper endplate 10 and the lower endplate 20 is reduced, thereby reducing the overall height of the intervertebral prosthesis, and the intervertebral prosthesis is then placed into the intervertebral space of the human body. By using the first adjustment tool 100 and the second adjustment tool 200, the distance and angle between the upper endplate 10 and the lower endplate 20 are adjusted to match the shape of the intervertebral space of the human body. Then, using the support plate adjustment tool 300, the support plate 80 is placed between the upper endplate 10 and the lower endplate 20, so that the upper movable plate 12 switches to the first protruding position and the lower movable plate 22 switches to the second protruding position. After the support plate 80 is positioned between the upper endplate 10 and the lower endplate 20, bone cement is injected into the accommodating cavity through the injection port 842, and the sealing plug 85 is inserted into the injection port 842, thereby fixing the relative position of the first support block 81 and the second support block 82.

[0084] In the description of the present invention, it is to be understood that "plurality" refers to a quantity of two or more than two. 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 accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, 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 outline of each component itself.

[0085] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0086] 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. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0087] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An intervertebral prosthesis, characterized in that: include: upper endplate (10); A lower end plate (20) is spaced apart from the upper end plate (10); An adjusting shaft assembly (30) is disposed 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 disposed within the outer shaft (32); A first adjusting member (40) is provided on the inner shaft (31); a first transmission structure (50) connected between the first adjusting member (40) and the first end of the upper end plate (10) and between the first adjusting member (40) and the first end of the lower end plate (20); a second adjusting member (60) movably disposed on the outer shaft (32); A second transmission structure (70) is connected between the second adjusting member (60) and the second end of the upper end plate (10) and between the second adjusting member (60) and the second end of the lower end plate (20).

2. The intervertebral prosthesis according to claim 1, characterized in that The inner shaft (31) is provided with a first external thread section (311), the outer shaft (32) is provided with a second external thread section (321), and the outer shaft (32) is further provided with a first threaded hole (322) passing through both ends of the outer shaft (32) along the axial direction of the outer shaft (32), and a portion of the first external thread section (311) extends into the first threaded hole (322) and is threadably engaged with the first threaded hole (322); The first adjusting member (40) comprises a first connecting ring (41) which is relatively rotatably sleeved on the inner shaft (31) along the circumference of the inner shaft (31), the first connecting ring (41) being arranged at an end of the inner shaft (31) away from the outer shaft (32), and the first transmission structure (50) is connected to 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), wherein the matching sleeve (62) is provided with a second threaded hole (621), the matching sleeve (62) is sleeved on the outer shaft (32) and threadably engaged with the second outer thread section (321), and the second transmission structure (70) is connected to the second connecting ring (61).

3. The intervertebral prosthesis according to claim 2, characterized in that A first operating hole (312) is provided on the end surface of the inner shaft (31) extending into the first threaded hole (322), and the first operating hole (312) is connected to the outside of the intervertebral prosthesis; a second operating hole (3231) is provided on the end of the outer shaft (32) away from the first connecting ring (41); and a third operating hole (622) is provided on the surface of the matching sleeve (62) away from the first connecting ring (41).

4. The intervertebral prosthesis according to claim 3, characterized in that The second external thread segment (321) is provided with a stop ring (323) protruding in the radial direction of the second external thread segment (321), and the stop ring (323) is located at an end of the second external thread segment (321) away from the first connecting ring (41); The stop ring (323) is located on a side of the matching sleeve (62) away from the first connecting ring (41) and is engaged with the matching sleeve (62) in a stop manner; and / or, The second operating hole (3231) is provided on a surface of the stop ring (323) away from the first connecting ring (41).

5. The intervertebral prosthesis according to claim 1, characterized in that The first transmission structure (50) includes a first connecting rod (51) and a second connecting rod (52), wherein 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) includes a third connecting rod (71) and a fourth connecting rod (72), wherein 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, characterized in that A first hinge shaft is provided at the first end of the upper end plate (10), and a first end of the first connecting rod (51) is hinged to the first hinge shaft; a second hinge shaft (112) is provided at the second end of the upper end plate (10), and a first end of the third connecting rod (71) is hinged to the second hinge shaft (112); and / or, A third hinge shaft (211) is provided at the first end of the lower end plate (20), and a first end of the second connecting rod (52) is hinged to the third hinge shaft (211); a fourth hinge shaft (212) is provided at the second end of the lower end plate (20), and a first end of the fourth connecting rod (72) is hinged to the fourth hinge shaft (212).

7. The intervertebral prosthesis according to claim 1, characterized in that 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), wherein the upper movable plate (12) is movable to have a first protruding position protruding from 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 comprises a support plate (80), wherein the support plate (80) is supported between the lower end plate (20) and the upper movable plate (12) so as to keep the upper movable plate (12) in the first convex position.

8. The intervertebral prosthesis according to claim 7, characterized in that A first card slot is provided on the upper movable plate (12), and the support plate (80) includes 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), wherein the first support block (81) extends into the first card slot and engages with the first card slot, and the second support block (82) is connected to the lower end plate (20).

9. The intervertebral prosthesis according to claim 8, characterized in that The support plate (80) further comprises a shell (84), the shell (84) having a first opening (841), the elastic member (83), at least a portion of the first support block (81), and at least a portion of the second support block (82) are all arranged in the shell (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 shell (84) form a receiving cavity, and the shell (84) is provided with an injection port (842) communicating with the receiving cavity.

10. The intervertebral prosthesis according to claim 9, characterized in that The first support block (81) is provided with a first fixing hole (811), and the shell (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), and the first fastener (91) passes through the first elongated hole (843) and extends into the first fixing hole (811) to fix the first support block (81) to the shell (84).

11. The intervertebral prosthesis according to claim 10, characterized in that The lower end plate (20) includes a lower end plate frame (21) and a lower movable plate (22) movably arranged in the lower end plate frame (21), the lower movable plate (22) being movable to have a second protruding position protruding from the surface of the lower end plate frame (21) and a second retracted position retracted into the lower end plate frame (21); a second card slot (221) is provided on the lower movable plate (22), the second support block (82) extends into the second card slot (221) and is engaged with the second card slot (221); the housing (84) also has a second opening, and the second support block (82) is telescopically arranged at the second opening; The second support block (82) is provided with a second fixing hole (821), and the shell (84) is provided with a second elongated hole (844) extending along the floating direction of the second support block (82). The intervertebral prosthesis also includes a second fastener (92), and the second fastener (92) passes through the second elongated hole (844) and extends into the second fixing hole (821) to fix the second support block (82) to the shell (84).

12. An intervertebral prosthesis assembly, characterized in that: The intervertebral prosthesis assembly includes an intervertebral prosthesis, a first adjustment tool (100) and a second adjustment tool (200), wherein the intervertebral prosthesis is the intervertebral prosthesis according to claim 3 or 4, wherein the first adjustment tool (100) can cooperate with the inner shaft (31) and the outer shaft (32) to drive the inner shaft (31) and the outer shaft (32) to rotate relative to each other; and the second adjustment tool (200) can cooperate with the outer shaft (32) and the matching sleeve (62) to drive the outer shaft (32) and the matching sleeve (62) to rotate relative to each other.

13. The intervertebral prosthesis assembly according to claim 12, wherein: The first adjusting tool (100) comprises a first sleeve (110), a first rotating rod (120) and a first inserting rod (130), wherein the first rotating rod (120) is rotatable and movable along the axial direction of the first sleeve (110) and is arranged in the first sleeve (110), and the first inserting rod (130) is arranged on the first sleeve (110); the first rotating rod (120) can be inserted into the first operating hole (312) and fixedly connected to the inner shaft (31), and the first inserting rod (130) can be inserted into the second operating hole (3231) and fixedly connected to the outer shaft (32); and / or, The second adjustment tool (200) includes a second sleeve (210), a second rotating rod (220), a third insertion rod (230) and a fourth insertion rod (240). The second rotating rod (220) is rotatable and movably arranged in the second sleeve (210) along the axial direction of the second sleeve (210). The third insertion rod (230) is arranged on the second rotating rod (220). The fourth insertion rod (240) is arranged on the second sleeve (210). The third insertion rod (230) can be inserted into the second operating hole (3231) and fixedly connected to the outer shaft (32). The fourth insertion rod (240) can be inserted into the third operating hole (622) and fixedly connected to the matching sleeve (62).

14. An intervertebral prosthesis assembly, comprising an intervertebral prosthesis and a support plate adjustment tool (300) detachably arranged from the intervertebral prosthesis, characterized in that: The intervertebral prosthesis is the intervertebral prosthesis according to claim 11, and the support plate adjustment tool (300) includes a tool body (310), a first plug-in rod (320), a second plug-in rod (330) and a clamping member (340), wherein the first plug-in rod (320) is arranged on the tool body (310), and the second plug-in rod (330) is movably arranged on the tool body (310), and the first plug-in rod (330) can be inserted into the first fixing hole (811) and fixedly connected to the first support block (81), and the second plug-in rod (330) can be inserted into the second fixing hole (821) and fixedly connected to the second support block (82), and the clamping member (340) can be movably arranged on the tool body (310) and drives the second plug-in rod (330) to approach the first plug-in rod (320).

15. The intervertebral prosthesis assembly according to claim 14, wherein: A guide hole (313) is provided on the tool body (310), and the second plug-in rod (330) is movably provided in the guide hole (313) and is guided and matched with the guide hole (313); and / or, A third threaded hole (314) is provided on the tool body (310), and the clamping member (340) includes a screw rod (341) and a stop block (342) provided at one end of the screw rod (341), the screw rod (341) is threadedly engaged with the third threaded hole (314), the second plug-in rod (330) is passed through the screw rod (341), and the second plug-in rod (330) is stop-engaged with the stop block (342).

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