CN120713683A - Intervertebral prosthesis and intervertebral prosthesis component - Google Patents
Intervertebral prosthesis and intervertebral prosthesis componentInfo
- Publication number
- CN120713683A CN120713683A CN202511159540.9A CN202511159540A CN120713683A CN 120713683 A CN120713683 A CN 120713683A CN 202511159540 A CN202511159540 A CN 202511159540A CN 120713683 A CN120713683 A CN 120713683A
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- intervertebral prosthesis
- rod
- end plate
- support block
- shaft
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Abstract
The application provides an intervertebral prosthesis and an intervertebral prosthesis assembly, wherein the intervertebral prosthesis comprises an upper end plate, a lower end plate, an adjusting shaft assembly, a first transmission structure, a second transmission structure and a second transmission structure, wherein the upper end plate is arranged at intervals with the upper end plate, the adjusting shaft assembly is arranged between the upper end plate and the lower end plate and comprises an outer shaft and an inner shaft which is arranged in the outer shaft in a telescopic mode, the first transmission structure is arranged on the inner shaft and 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 transmission structure is movably arranged on the outer shaft and 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. The technical scheme of the application effectively solves the problems that the intervertebral prosthesis in the related technology is difficult to match with the natural angle of the intervertebral space and the use stability of the intervertebral prosthesis is reduced.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an intervertebral prosthesis and an intervertebral prosthesis component.
Background
In the field of medical appliances, the intervertebral prosthesis has wide application, and is mainly used for treating intervertebral disc lesions or unstable spines caused by diseases such as spine degenerative diseases, spine fracture, spine tumors and the like. The intervertebral prosthesis can provide support between the intervertebral spaces, promote bone fusion between vertebral bodies, and maintain the normal sequence and stability of the spine.
The related art intervertebral prosthesis includes upper and lower endplates that adjust the overall height of the intervertebral prosthesis by being moved closer to or farther from each other. Since the direction of movement of the upper and lower endplates is always reversed, the relative angle between the outer surfaces of the upper and lower endplates remains fixed, i.e., the angle between the two surfaces of the intervertebral prosthesis that are in contact with the intervertebral space.
The normal human body intervertebral space not only has a height difference, but also has a certain angle difference so as to adapt to the natural physiological curvature and load requirements of the spine. Because the angle between the two surfaces of the intervertebral prosthesis in the related art, which are in contact with the intervertebral space, is fixed, the intervertebral prosthesis is difficult to match the natural angle of the intervertebral space, the intervertebral prosthesis is easy to loosen or shift after being implanted, and the use stability of the intervertebral prosthesis is reduced.
Disclosure of Invention
The invention mainly aims to provide an intervertebral prosthesis and an intervertebral prosthesis component, so as to solve the problems that the intervertebral prosthesis in the related art is difficult to match with the natural angle of an intervertebral space and the use stability of the intervertebral prosthesis is reduced.
In order to achieve the above object, according to one aspect of the present invention, there is provided an intervertebral prosthesis comprising an upper endplate, a lower endplate spaced apart from the upper endplate, an adjustment shaft assembly disposed between the upper endplate and the lower endplate, the adjustment shaft assembly including an outer shaft and an inner shaft telescopically disposed within the outer shaft, a first adjustment member disposed on the inner shaft, a first transmission structure coupled between the first adjustment member and a first end of the upper endplate and between the first adjustment member and a first end of the lower endplate, a second adjustment member movably disposed on the outer shaft, and a second transmission structure coupled between the second adjustment member and a second end of the upper endplate and between the second adjustment member and a second end of the lower endplate.
The first adjusting piece comprises a first connecting ring which is sleeved on the inner shaft in a relative rotatable mode along the circumferential direction of the inner shaft, the first connecting ring is arranged at one end, far away from the outer shaft, of the inner shaft, the first transmission structure is connected with the first connecting ring, the second adjusting piece comprises a second connecting ring and a matching sleeve which is rotatably arranged on the second connecting ring, a second threaded hole is formed in the matching sleeve, the matching sleeve is sleeved on the outer shaft and is in threaded fit with the second outer threaded section, and the second transmission structure is connected with the second connecting ring.
Further, a first operation hole is formed in the end face, which is inserted into the first threaded hole, of the inner shaft, the first operation hole is communicated with the outside of the intervertebral prosthesis, a second operation hole is formed in one end, far away from the first connection ring, of the outer shaft, and a third operation hole is formed in the surface, far away from the first connection ring, of the matching sleeve.
Further, a stop ring protruding radially from the second external thread section is arranged on the second external thread section, the stop ring is located at one end of the second external thread section away from the first connecting ring, the stop ring is located at one side of the matching sleeve away from the first connecting ring and is in stop fit 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.
Further, the first transmission structure comprises a first connecting rod and a second connecting rod, wherein the first end of the first connecting rod is hinged with the first end of the upper end plate, the second end of the first connecting rod is hinged with the first adjusting piece, the first end of the second connecting rod is hinged with the first end of the lower end plate, the second end of the second connecting rod is hinged with the first adjusting piece, the second transmission structure comprises a third connecting rod and a fourth connecting rod, the first end of the third connecting rod is hinged with the second end of the upper end plate, the second end of the third connecting rod is hinged with the second adjusting piece, the first end of the fourth connecting rod is hinged with the second end of the lower end plate, and the second end of the fourth connecting rod is hinged with the second adjusting piece.
Further, a first hinge shaft is arranged at the first end of the upper end plate, a first end of the first connecting rod is hinged with the first hinge shaft, a second hinge shaft is arranged at the second end of the upper end plate, a first end of the third connecting rod is hinged with the second hinge shaft, and/or a third hinge shaft is arranged at the first end of the lower end plate, a first end of the second connecting rod is hinged with the third hinge shaft, a fourth hinge shaft is arranged at the second end of the lower end plate, and a first end of the fourth connecting rod is hinged with the fourth hinge shaft.
Further, the upper endplate includes an upper endplate frame and an upper movable plate movably disposed within the upper endplate frame, the upper movable plate movable to have a first convex position protruding from a surface of the upper endplate frame and a first retracted position retracted within the upper endplate frame, and the intervertebral prosthesis further includes a buttress plate supported between the lower endplate and the upper movable plate to retain the upper movable plate in the first convex position.
Further, be provided with first draw-in groove on the last fly leaf, the backup pad includes first supporting shoe, second supporting shoe and connects the elastic component between first supporting shoe and second supporting shoe, and first supporting shoe stretches into in the first draw-in groove and cooperates with first draw-in groove joint, and the second supporting shoe is connected with lower endplate.
Further, the support plate further comprises a shell, the shell is provided with a first opening, the elastic piece, at least part of the first support block and at least part of the second support block are arranged in the shell, the first support block is arranged at the first opening in a telescopic mode, the first support block, the second support block and the shell enclose an accommodating cavity, and an injection port communicated with the accommodating cavity is formed in the shell.
Further, a first fixing hole is formed in the first supporting block, a first long-strip hole extending along the floating direction of the first supporting block is formed in the shell, the intervertebral prosthesis further comprises a first fastening piece, and the first fastening piece penetrates through the first long-strip hole and stretches into the first fixing hole so that the first supporting block is fixedly connected with the shell.
Further, the lower endplate includes a lower endplate frame and a lower movable plate movably disposed within the lower endplate frame, the lower movable plate movable to have a second protruding position protruding from a surface of the lower endplate frame and a second retracted position retracted into the lower endplate frame; the intervertebral prosthesis comprises a shell, a first supporting block, a first clamping groove, a first fixing hole, a first fixing piece, a second fixing piece, a first fixing piece and a second fixing piece, wherein the first clamping groove is formed in the lower movable plate, the first supporting block extends into the first clamping groove and is matched with the first clamping groove in a clamping mode, the shell is further provided with a first opening, the first supporting block is arranged at the first opening in a telescopic mode, the first fixing hole is formed in the first supporting block, the shell is provided with a first long hole extending along the floating direction of the first supporting block, the intervertebral prosthesis further comprises a first fixing piece, and the first fixing piece penetrates through the first long hole and extends into the first fixing hole to enable the first supporting block to be fixedly connected with the shell.
According to another aspect of the present invention, there is provided an intervertebral prosthesis assembly comprising an intervertebral prosthesis, a first adjustment tool and a second adjustment tool, the intervertebral prosthesis being an intervertebral prosthesis as described above, the first adjustment tool being engageable with an inner shaft and an outer shaft to drive the inner shaft to rotate relative to the outer shaft, the second adjustment tool being engageable with the outer shaft and a mating sleeve to drive the outer shaft to rotate relative to the mating sleeve.
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, the first inserting rod is arranged on the first sleeve, the first rotating rod can be inserted into the first operation hole and fixedly connected with the inner shaft, the first inserting rod can be inserted into the second operation 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, the fourth inserting rod is arranged on the second sleeve, and the third inserting rod can be inserted into the second operation hole and fixedly connected with the outer shaft, and the fourth inserting rod can be inserted into the third operation hole and fixedly connected with the matching sleeve.
According to another aspect of the present invention, there is provided an intervertebral prosthesis assembly including an intervertebral prosthesis and a buttress plate adjustment tool detachably provided with the intervertebral prosthesis, the intervertebral prosthesis being an intervertebral prosthesis as described above, the buttress plate adjustment tool including a tool body, a first insertion rod provided on the tool body, a second insertion rod movably provided on the tool body, and a clamping member movably provided on the tool body, the first insertion rod being insertable into a first fixing hole and fixedly connected with a first buttress block, the second insertion rod being insertable into a second fixing hole and fixedly connected with a second buttress block, the clamping member being movably provided on the tool body and driving the second insertion rod to be adjacent to the first insertion rod.
Further, a guide hole is formed in the tool main body, a second inserting connection rod is movably arranged in the guide hole and is in guide fit with the guide hole, and/or a third threaded hole is formed in the tool main body, the clamping piece comprises a screw rod and a stop block arranged at one end of the screw rod, the screw rod is in threaded fit with the third threaded hole, the second inserting connection rod penetrates through the screw rod, and the second inserting connection rod is in stop fit with the stop block.
By applying the technical scheme of the application, the intervertebral prosthesis comprises an upper endplate, a lower endplate, an adjusting shaft assembly, a first adjusting piece, a first transmission structure, a second adjusting piece and a second transmission structure. The lower endplate is spaced from the upper endplate. An adjustment shaft assembly is disposed between the upper endplate and the lower endplate, the adjustment shaft assembly including an outer shaft and an inner shaft telescopically disposed within the outer shaft. The first adjusting piece is arranged on the inner shaft. The first transmission structure is connected between the first adjustment member and the first end of the upper endplate and between the first adjustment member and the first end of the lower endplate. The second adjustment member is movably disposed on the outer shaft. The second transmission structure is connected between the second adjustment member and the second end of the upper endplate and between the second adjustment member and the second end of the lower endplate. In this way, the inner shaft is movable relative to the outer shaft by telescopically disposing the inner shaft within the outer shaft in the adjustment shaft assembly. When the inner shaft performs telescopic movement relative to the outer shaft, the inner shaft can drive the first adjusting piece to move, the first adjusting piece moves to drive the first end of the upper end plate and the first end of the lower end plate to be close to or far away from each other through the first transmission structure, and accordingly telescopic movement of the inner shaft can be converted into angle adjustment between the first end of the upper end plate and the first end of the lower end plate. By arranging the second adjustment member movably on the outer shaft such that when the second adjustment member is moved relative to the outer shaft, the second adjustment member is able to drive 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, such that movement of the second adjustment member is translated into angular adjustment between the second end of the upper endplate and the second end of the lower endplate. Through the arrangement, the independent adjustment of the angle between the two surfaces of the intervertebral prosthesis and the intervertebral space is realized, so that the relative angle between the upper end plate and the lower end plate can be adjusted, the intervertebral prosthesis can be ensured to better match the natural physiological curvature of the intervertebral space, the fit between the intervertebral prosthesis and the intervertebral space is tighter, the loosening or shifting risk after the intervertebral prosthesis is implanted is reduced, and the use stability of the intervertebral prosthesis is improved. Therefore, the technical scheme of the application effectively solves the problem that the intervertebral prosthesis in the related technology is difficult to match with the natural angle of the intervertebral space, and reduces the use stability of the intervertebral prosthesis.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 shows a schematic perspective view of an embodiment of an intervertebral prosthesis according to the present invention;
FIG. 2 shows a partially exploded view of the intervertebral prosthesis of FIG. 1;
FIG. 3 shows a schematic perspective view of a buttress plate of the intervertebral prosthesis of FIG. 1;
FIG. 4 shows a schematic exploded view of the buttress plate of the intervertebral prosthesis of FIG. 1;
FIG. 5 illustrates a partially exploded view of the intervertebral prosthesis of FIG. 1 without the buttress plate shown;
FIG. 6 illustrates an exploded view of the intervertebral prosthesis of FIG. 5 without the upper endplate and lower endplate shown;
FIG. 7 shows a schematic perspective view of an intervertebral prosthesis in combination with a first adjustment tool according to an embodiment of the intervertebral prosthesis assembly of the present invention;
FIG. 8 illustrates a first adjustment tool exploded view of the intervertebral prosthetic assembly of FIG. 7;
FIG. 9 shows a schematic perspective view of an intervertebral prosthesis in combination with a second adjustment tool according to an embodiment of the intervertebral prosthesis assembly of the present invention;
FIG. 10 illustrates an exploded view of a second adjustment tool of the intervertebral prosthetic assembly of FIG. 9;
FIG. 11 illustrates a schematic perspective view of an intervertebral prosthesis in combination with a buttress plate adjustment tool according to an embodiment of an intervertebral prosthesis assembly of the present invention;
FIG. 12 illustrates a schematic perspective view of a buttress plate adjustment tool of the intervertebral prosthetic assembly of FIG. 11;
fig. 13 shows a schematic exploded view of a buttress plate adjustment tool of the intervertebral prosthetic assembly of fig. 11.
Wherein the above figures include the following reference numerals:
10. The device comprises an upper endplate, an upper endplate frame, 112, a second hinge shaft, 12 and an upper movable plate, wherein the upper endplate frame is provided with a first hinge shaft;
20. the device comprises a lower endplate, a lower endplate frame body, a third hinge shaft, a fourth hinge shaft, a lower movable plate, a second clamping groove and a second clamping groove, wherein the lower endplate frame body comprises a lower endplate, a lower endplate frame body, a lower endplate and a lower endplate;
30. the adjusting shaft assembly comprises 31, an inner shaft, 311, a first external thread section, 312, a first operation hole, 32, an outer shaft, 321, a second external thread section, 322, a first threaded hole, 323, a stop ring, 3231 and a second operation hole;
40. a first adjusting member 41, a first connecting ring;
50. The first transmission structure comprises a first connecting rod, a first transmission structure, a second connecting rod and a second transmission structure;
60. The second adjusting piece, 61, a second connecting ring, 62, a matching sleeve, 621, a second threaded hole, 622 and a third operating hole;
70. The second transmission structure, 71, the third connecting rod, 72, the fourth connecting rod;
80. The device comprises a supporting plate, 81, a first supporting block, 811, a first fixing hole, 82, a second supporting block, 821, a second fixing hole, 83, an elastic piece, 84, a shell, 841, a first opening, 842, an injection opening, 843, a first long hole, 844, a second long hole and 85, a sealing plug;
91. 92, second fastening members;
100. The device comprises a first adjusting tool, 110, a first sleeve, 120, a first rotating rod, 130 and a first inserting rod;
200. The second adjusting tool, 210, a second sleeve, 220, a second rotating rod, 230, a third inserting rod, 240 and a fourth inserting rod;
300. The tool comprises a supporting plate adjusting tool, 310, a tool main body, 313, a guide hole, 314, a third threaded hole, 320, a first inserting and connecting rod, 330, a second inserting and connecting rod, 340, a clamping piece, 341, a screw rod, 342 and a stop block.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In this embodiment, as shown in FIGS. 1-6, 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 from the upper endplate 10. An adjustment shaft assembly 30 is disposed between the upper endplate 10 and the lower endplate 20, and the adjustment shaft assembly 30 includes an outer shaft 32 and an inner shaft 31 telescopically disposed within the outer shaft 32. The first regulating member 40 is provided 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.
Thus, by telescopically disposing the inner shaft 31 within the outer shaft 32 in the adjustment shaft assembly 30, the inner shaft 31 is able 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 can move the first adjustment member 40, and the first adjustment member 40 moves to drive the first end of the upper endplate 10 and the first end of the lower endplate 20 toward or away from each other via the first transmission structure 50, such that the telescopic movement of the inner shaft 31 can be translated into angular adjustment between the first end of the upper endplate 10 and the first end of the lower endplate 20. By movably positioning the second adjustment member 60 on the outer shaft 32 such that when the second adjustment member 60 is moved relative to the outer shaft 32, the second adjustment member 60 can move the second end of the upper endplate 10 and the second end of the lower endplate 20 toward or away from each other via the second transmission structure 70 such that movement of the second adjustment member 60 can translate into angular adjustment between the second end of the upper endplate 10 and the second end of the lower endplate 20. Through the arrangement, the independent adjustment of the angle between the two surfaces of the intervertebral prosthesis and the intervertebral space is realized, so that the relative angle between the upper end plate 10 and the lower end plate 20 can be adjusted, the intervertebral prosthesis can be ensured to better match the natural physiological curvature of the intervertebral space, the fit between the intervertebral prosthesis and the intervertebral space is tighter, the loosening or shifting risk after the intervertebral prosthesis is implanted is reduced, and the use stability of the intervertebral prosthesis is improved. Therefore, the technical scheme of the embodiment effectively solves the problem that the intervertebral prosthesis in the related technology is difficult to match with the natural angle of the intervertebral space, and reduces the use stability of the intervertebral prosthesis.
Furthermore, the inventor has found that another intervertebral prosthesis according to the related art includes an upper endplate and a lower endplate that are fixedly connected, and that it is generally necessary to confirm the model specification of the applicable intervertebral prosthesis according to the parameters of the intervertebral space, and to obtain the intervertebral prosthesis with corresponding parameters by customizing, and to implant the intervertebral prosthesis to a predetermined position by knocking with an implantation tool during implantation, such implantation operation may cause damage to the human body vertebral body.
By applying the technical scheme of the embodiment, the first end of the upper end plate 10 and the first end of the lower end plate 20 can be driven to be close to each other by the extension and contraction 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 driven to be close to each other by the movement of the second adjusting member 60 on the outer shaft 32, so that the overall height of the intervertebral prosthesis is reduced, the intervertebral prosthesis is conveniently implanted into the intervertebral space, the situation that the intervertebral prosthesis is implanted in a knocking mode in the related art is avoided, and the damage to the human vertebral body is reduced. And, after the intervertebral prosthesis is implanted, the first end of the upper endplate 10 and the first end of the lower endplate 20 can be far away from each other by driving the inner shaft 31 to stretch and retract relative to the outer shaft 32, and the second end of the upper endplate 10 and the second end of the lower endplate 20 can be driven to be far away from each other by moving the second adjusting piece 60 on the outer shaft 32, so that the overall height of the intervertebral prosthesis is improved, the intervertebral prosthesis can be supported conveniently, and the use stability of the intervertebral prosthesis is improved.
As shown in fig. 5 and 6, 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, the outer shaft 32 is further provided with a first threaded hole 322 penetrating both ends of the outer shaft 32 in the axial direction of the outer shaft 32, and a part of the first external thread section 311 extends into the first threaded hole 322 and is in threaded engagement with the first threaded hole 322. The first adjusting member 40 includes 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 disposed 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 includes a second connecting ring 61 and a coupling sleeve 62 rotatably provided on the second connecting ring 61, a second threaded hole 621 is provided on the coupling sleeve 62, the coupling sleeve 62 is sleeved on the outer shaft 32 and is screw-coupled with the second external screw thread section 321, and the second transmission structure 70 is connected with the second connecting ring 61. The first screw holes 322 penetrate both ends of the outer shaft 32 in the axial direction of the outer shaft 32 so that a 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. In addition, the arrangement of the first screw holes 322 penetrating both ends of the outer shaft 32 allows a user to perform an operation of driving the rotation of the inner shaft 31 with respect to the outer shaft 32 and an operation of driving the movement of the second adjusting member 60 with respect to the outer shaft 32 on the same side, so that the inner shaft 31 and the second adjusting member 60 are operated on the same side after the intervertebral prosthesis is implanted, thereby facilitating the adjustment of the intervertebral prosthesis. By providing the first external screw thread segment 311 on the inner shaft 31 and the first screw thread 322 on the outer shaft 32, the inner shaft 31 can move along the axial direction of the outer shaft 32 when rotating relative to the outer shaft 32, thereby driving the first adjusting member 40 to move. By providing the second externally threaded section 321 on the outer shaft 32, the second threaded hole 621 is provided on the mating sleeve 62 such that the mating sleeve 62 can move in the axial direction of the outer shaft 32 when rotated relative to the outer shaft 32 to drive the second connecting ring 61 to move in the axial direction of the outer shaft 32, thereby driving the second ends of the upper endplate 10 and the lower endplate 20 toward or away from each other via the second transmission structure 70. And, the mating sleeve 62 is rotatably disposed on the second connecting ring 61 such that the second connecting ring 61 can maintain a state of moving along the axial direction of the outer shaft 32 when the mating sleeve 62 is rotated, so that the movement of the second connecting ring 61 is more stable and the adjustment of the second ends of the upper and lower endplates 10, 20 is more stable and reliable.
In some embodiments, the position of the first connecting ring 41 is fixed relative to the inner shaft 31 in the axial direction along the inner shaft 31. That is, the first coupling ring 41 rotates only with respect to the inner shaft 31 and does not move with respect to the inner shaft 31. The inner shaft 31 is provided with a first reduced diameter section, the first connecting ring 41 is provided with a first via hole, and the first via hole is sleeved outside the first reduced diameter section so that the first connecting ring 41 can rotate relative to the inner shaft 31. The second reducing section is arranged on the matching sleeve 62, the second connecting ring 61 is provided with a second through hole, and the second through hole is sleeved outside the second reducing section, so that the matching sleeve 62 can rotate relative to the second connecting ring 61.
As shown in fig. 5, the end surface of the inner shaft 31 extending into the first threaded hole 322 is provided with a first operation hole 312, and the first operation hole 312 communicates with the outside of the intervertebral prosthesis. The end of the outer shaft 32 remote from the first coupling ring 41 is provided with a second operating hole 3231. The surface of the mating sleeve 62 facing away from the first connecting ring 41 is provided with a third operating aperture 622. The provision of the first operation hole 312 facilitates the use of a tool by a user to fix the inner shaft 31, thereby facilitating the adjustment operation of the inner shaft 31. The first operation hole 312 is provided in communication with the outside of the intervertebral prosthesis, so that the driving operation of the inner shaft 31 by the user is facilitated. The provision of the second manipulation hole 3231 facilitates the use of a tool by a user to fix the outer shaft 32, thereby facilitating the adjustment manipulation of the outer shaft 32. The third operation hole 622 is provided to facilitate the use of a tool by a user to fix the fit sleeve 62, thereby facilitating the adjustment operation of the fit sleeve 62. In addition, through the arrangement, the first operation hole 312, the second operation hole 3231 and the third operation hole 622 are all positioned at the same end of the intervertebral prosthesis, so that the adjustment operation of a user is further facilitated.
In some embodiments, as shown in fig. 5, 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 in a projection plane perpendicular to an axis of the outer shaft 32. The third operation holes 622 are provided in plural at intervals along the circumferential direction of the outer shaft 32, the second operation holes 3231 are provided in plural at intervals along the circumferential direction of the outer shaft 32, and the first operation holes 312 are provided in one.
As shown in fig. 5 and 6, the second external thread section 321 is provided with a stopper ring 323 protruding in the radial direction of the second external thread section 321, and the stopper ring 323 is located at an end of the second external thread section 321 remote from the first connection ring 41. The stop ring 323 is located on a side of the mating sleeve 62 remote from the first connecting ring 41 and is in stop fit with the mating sleeve 62. The second operation hole 3231 is provided on a surface of the stopper ring 323 remote from the first connection ring 41. The stop ring 323 cooperates with the stop of the mating sleeve 62 to limit the maximum movement range of the second adjusting member 60 during the adjustment process, so that the movement of the mating sleeve 62 on the outer shaft 32 is more reliable, the structural escape caused by excessive adjustment is prevented, and the safety and reliability of the intervertebral prosthesis implantation operation are ensured. Also, providing the second operation hole 3231 on the stopper ring 323 facilitates the processing, and also increases the area where the second operation hole 3231 is provided, facilitating the alignment operation when a user uses a tool.
In other embodiments, the second external thread section 321 is provided with a stop ring 323 protruding in a radial direction of the second external thread section 321, and the stop ring 323 is located at an end of the second external thread section 321 away from the first connection ring 41. The stop ring 323 is located on a side of the mating sleeve 62 remote from the first connecting ring 41 and is in stop fit with the mating sleeve 62. Or the second operation hole 3231 is provided on a surface of the stopper ring 323 remote from the first connection ring 41.
As shown in fig. 2, 5 and 6, 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 endplate 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 endplate 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, the first end of the third connecting rod 71 being hinged to the second end of the upper endplate 10, the second end of the third connecting rod 71 being hinged to the second adjustment member 60, the first end of the fourth connecting rod 72 being hinged to the second end of the lower endplate 20, and the second end of the fourth connecting rod 72 being hinged to the second adjustment member 60. The first transmission structure 50 and the second transmission structure 70 respectively realize hinged coordination with the upper endplate 10 and the lower endplate 20 through the first connecting rod 51, the second connecting rod 52, the third connecting rod 71 and the fourth connecting rod 72, so that flexibility and reliability of the upper endplate 10 and the lower endplate 20 in angle adjustment are realized, and the upper endplate 10 and the lower endplate 20 can be accurately adjusted to adapt to natural physiological curvature of an intervertebral space. And, 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, and the first end of the upper endplate 10 hinged to the first end of the first connecting rod 51 can approach or separate from the first end of the lower endplate 20. The linkage between the first adjusting member 40 and the second connecting rod 52 is referred to as the linkage between the first adjusting member 40 and the first connecting rod 51. When the second adjustment member 60 is moved on the outer shaft 32, the second adjustment member 60 moves the second end of the third connecting rod 71 to oscillate the third connecting rod 71, thereby moving the second end of the upper endplate 10 hinged with the first end of the third connecting rod 71 toward or away from the second end of the lower endplate 20. The linkage between the second adjuster 60 and the fourth connecting rod 72 is referred to as the linkage between the second adjuster 60 and the third connecting rod 71.
In an embodiment not shown, the first transmission structure includes a first tapered surface disposed on the first end of the upper endplate and a second tapered surface disposed on the first end of the lower endplate, with the first adjustment member disposed between the first tapered surface and the second tapered surface. When the first adjusting piece moves, the first adjusting piece is abutted with the first conical surface and the second conical surface so as to push the first end of the upper end plate and the first end of the lower end plate to be far away from each other. The second driving structure includes a third tapered surface disposed on the second end of the upper endplate and a fourth tapered surface disposed on the second end of the lower endplate, and the second adjustment member is disposed between the third tapered surface and the fourth tapered surface. When the second adjusting piece moves on the outer shaft, the second adjusting piece is in butt joint with the third conical surface and the fourth conical surface so as to push the second end of the upper end plate and the second end of the lower end plate to be far away from each other.
As shown in fig. 1,2 and 5, the first end of the upper endplate 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 endplate 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. The first end of the lower endplate 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 endplate 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. The arrangement of the first hinge shaft, the second hinge shaft 112, the third hinge shaft 211 and the fourth hinge shaft 212 on the upper endplate 10 and the lower endplate 20 provides accurate hinge points for the first connecting rod 51, the second connecting rod 52, the third connecting rod 71 and the fourth connecting rod 72, ensures stability and reliability in the adjustment process, reduces loosening or shifting risk after the prosthesis is implanted, and improves stability during use.
In other embodiments, the first end of the upper endplate 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 endplate 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. Or the first end of the lower endplate 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 endplate 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.
As shown in fig. 2 and 5, the upper endplate 10 includes an upper endplate frame 11 and an upper movable plate 12 movably disposed within the upper endplate frame 11, the upper movable plate 12 being movable to have a first convex position protruding from a surface of the upper endplate frame 11 and a first concave position retracted within the upper endplate frame 11. The intervertebral prosthesis further includes a buttress plate 80, the buttress plate 80 being supported between the lower endplate 20 and the upper mobile plate 12 to maintain the upper mobile plate 12 in the first, convex position. Thus, during the implantation of the intervertebral prosthesis, the upper movable plate 12 can be in the first retracted position retracted into the upper endplate frame 11, so that the outer surface of the upper movable plate 12 can be lower than the outer surface of the upper endplate frame 11, the resistance during implantation is reduced, the interference between the upper movable plate 12 and the human vertebral body during implantation is also reduced, and the damage to the human vertebral body is reduced, so that the implantation is smoother. When the intervertebral prosthesis is implanted, the supporting plate 80 is supported between the lower endplate 20 and the upper movable plate 12, so that the upper movable plate 12 is kept at the first protruding position protruding out of the surface of the upper endplate frame 11, the contact area between the upper endplate 10 and the vertebral body of a human body is increased, bone growth is facilitated, stability after implantation is improved, the intervertebral prosthesis is ensured to be implanted, spinal sequence and stability can be better maintained, and postoperative complications are reduced.
As shown in fig. 2 and 5, the upper movable plate 12 is provided with a first clamping groove, 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 supporting block 81 extends into the first clamping groove and is matched with the first clamping groove in a clamping mode, and the second supporting 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 made adjustable by the provision of the elastic member 83, facilitating the placement of the buttress plate 80 between the upper endplate 10 and the lower endplate 20. The first supporting block 81 is convenient to be connected with the upper movable plate 12 through the arrangement of the first clamping groove, so that the connection between the supporting plate 80 and the upper movable plate 12 is more stable and reliable.
In some embodiments, the spring 83 is provided in a plurality of spaced apart arrangement to enable the first support block 81 to match the angle of inclination of the upper endplate 10 to better support the upper endplate 10. The elastic member 83 is preferably a spring.
As shown in fig. 3 and 4, the support plate 80 further includes a housing 84, the housing 84 has a first opening 841, and 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 in the housing 84, and the first support block 81 is telescopically disposed at the first opening 841. The first support block 81, the second support block 82, and the housing 84 define a receiving chamber, and an injection port 842 communicating with the receiving chamber is provided in the housing 84. The provision of the housing 84 not only protects the inner first support block 81, the second support block 82, and the elastic member 83, but also facilitates the formation of the accommodation chamber. After buttress plate 80 is disposed between upper endplate 10 and lower endplate 20, bone cement is injected into the receiving cavity through injection port 842, thereby enabling the relative positions of first buttress 81 and second buttress 82 to be fixed, enhancing the structural strength of buttress plate 80, enabling buttress plate 80 to be more reliably supported between upper endplate 10 and lower endplate 20, improving the structural strength of the intervertebral prosthesis, and enabling upper mobile plate 12 to be more reliably held in the first protruding position.
In some embodiments, the intervertebral prosthesis further includes a closure plug 85 sealably disposed at the injection port 842. Injection port 842 is threaded with closure plug 85 to enhance the sealing effect.
As shown in fig. 3 and 4, 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 in the floating direction of the first support block 81. The intervertebral prosthesis further includes a first fastener 91, the first fastener 91 passing through the first elongated hole 843 and extending into the first fixation hole 811 to fixedly couple the first support block 81 to the housing 84. The first fastener 91 passes through the first elongated hole 843 of the housing 84 and cooperates with the first fixing hole 811 of 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. In addition, the first support block 81 is fixed to the housing 84 at an adjustable position by the first elongated hole 843, thereby improving flexibility of the intervertebral prosthesis.
As shown in fig. 1-6, 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 movable to have a second convex position protruding from a surface of the lower endplate frame 21 and a second concave position retracted into the lower endplate frame 21. The lower movable plate 22 is provided with a second clamping groove 221, and the second supporting block 82 extends into the second clamping groove 221 and is in clamping fit with the second clamping groove 221. The housing 84 also has a second opening at which the second support block 82 is telescopically disposed. The second support block 82 is provided with a second fixing hole 821, the housing 84 is provided with a second elongated hole 844 extending along the floating direction of the second support block 82, and the intervertebral prosthesis further comprises a second fastening member 92, and the second fastening member 92 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 with the housing 84. The movable arrangement of the lower movable plate 22 enables the lower movable plate 22 to move between the second protruding position and the second retracted position, and in combination with the use of the second fastening member 92, the lower movable plate 22 can be ensured to be stably kept at an optimal position, damage to the human vertebral body during implantation is reduced, the supporting capacity of the human vertebral body after implantation is improved, the fit between the intervertebral prosthesis and the human vertebral body is enhanced, the overall stability is improved, the bone fusion is promoted, and the loosening risk is reduced.
In some embodiments, the first and second hinge shafts 112 are disposed on the upper endplate frame 11 and the third and fourth hinge shafts 211, 212 are disposed on the lower endplate frame 21. The upper endplate 10 and the lower endplate 20 are both fabricated using 3D printing techniques, and the upper and lower movable plates 12, 22 are both formed of a coarse trabecular bone structure. The first fixing hole 811 and the second fixing hole 821 are screw holes, and the first fastener 91 and the second fastener 92 are bolts.
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 of medical metal materials such as titanium alloy, tantalum metal, etc. by using 3D printing technology or conventional subtractive manufacturing technology. Through anodic oxidation surface treatment, ca, mn, cu, ag, zn, mg, P plasma can be introduced into the surface treatment, so that the bone promoting function of the intervertebral prosthesis is further improved, and the antibacterial performance of the intervertebral prosthesis can be also endowed.
The inventor finds that the intervertebral fusion prosthesis applied in the related technology is mostly made of titanium alloy and PEEK, and the material is biologically inert, so that the growth of bone tissue cannot be promoted, and good biological bone combination with human bone tissue cannot be formed. Precipitation of metal ions can also create a potential hazard to the safety and effectiveness of the prosthesis. The clinical application effect is also affected due to bacterial infection of the prosthesis. By applying the embodiment, ions with the functions of promoting the osteogenesis and the antibacterial property can be introduced by carrying out surface treatment on the intervertebral prosthesis, so that the corrosion resistance of the prosthesis is improved, the biological activity is improved, the osteogenesis and the antibacterial property are promoted, and the clinical application effect of the prosthesis is improved.
In some embodiments, the upper movable plate 12 includes a first plate body and two second plate bodies respectively disposed at both side edges of the first plate body, and the first plate body has a thickness greater than that of the second plate body. The surface of the upper endplate frame 11, which faces away from the lower endplate 20, is provided with a third opening, the two side surfaces of the upper endplate frame 11 are respectively provided with fourth openings, the second plate bodies are arranged in one-to-one correspondence with the fourth openings, and each second plate body is at least partially positioned in 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 endplate 20 is flush with or below the third opening. When the upper movable plate 12 is in the first convex position, the surface of the first plate body facing away from the lower endplate 20 is higher than the third opening. When the upper movable plate 12 is switched between the first retracted position and the first protruding position, the second plate body is in guiding fit with the fourth opening, so that the movement of the upper movable plate 12 is smoother and more reliable, and the connection between the upper movable plate 12 and the upper endplate frame 11 is more reliable.
The present application also provides an intervertebral prosthetic assembly, as shown in fig. 7-10, comprising an intervertebral prosthesis, a first adjustment tool 100, and a second adjustment tool 200. The intervertebral prosthesis is an intervertebral prosthesis as described above, and the first adjustment tool 100 can be coupled to 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. The second adjustment tool 200 can be engaged with the outer shaft 32 and the engagement sleeve 62 to drive the outer shaft 32 to rotate relative to the engagement sleeve 62. The intervertebral prosthesis can solve the problem that the intervertebral prosthesis in the related technology is difficult to match with the natural angle of the intervertebral space, so that the use stability of the intervertebral prosthesis is reduced, and the intervertebral prosthesis component with the intervertebral prosthesis can solve the same technical problem. In addition, the intervertebral prosthesis component realizes the accurate adjustment of the height and the angle of the intervertebral prosthesis through the matching of the first adjusting tool 100 and the second adjusting tool 200, and the comprehensive adjusting capability ensures that the intervertebral prosthesis can adapt to the complex structure of the intervertebral space of a human body, improves the matching degree and the stability after implantation, and also improves the convenience and the flexibility of the operation of the intervertebral prosthesis.
As shown in fig. 7 to 10, the first adjustment tool 100 includes a first sleeve 110, a first rotating lever 120, and a first insert lever 130, the first rotating lever 120 being rotatably and movably disposed in the first sleeve 110 along an axial direction of the first sleeve 110, the first insert lever 130 being disposed on the first sleeve 110. The first rotating rod 120 can be inserted into the first operating hole 312 and fixedly connected with the inner shaft 31, and the first inserting rod 130 can be inserted into the second operating hole 3231 and fixedly connected with the outer shaft 32. Through the arrangement of the first adjusting tool 100, a user can insert the first insert rod 130 into the second operating hole 3231 and fixedly connected with the outer shaft 32, insert the first rotating rod 120 into the first operating hole 312 and fixedly connected with the inner shaft 31, and drive the inner shaft 31 to rotate relative to the outer shaft 32 by driving the first rotating shaft to rotate relative to the first sleeve 110, so that the inner shaft 31 can move along the axial direction of the outer shaft 32 and the first connecting ring 41 can move along the axial direction of the outer shaft 32 due to the matching relationship between the inner shaft 31 and the first threaded hole 322 of the outer shaft 32, thereby enabling the first end of the upper end plate 10 and the first end of the lower end plate 20 to be close to each other or far away from each other so as to adjust the height and the angle of the intervertebral prosthesis. The second adjusting tool 200 includes a second sleeve 210, a second rotating rod 220, a third insert rod 230, and a fourth insert rod 240, wherein the second rotating rod 220 is rotatably and movably disposed in the second sleeve 210 along the axial direction of the second sleeve 210, the third insert rod 230 is disposed on the second rotating rod 220, and the fourth insert rod 240 is disposed on the second sleeve 210. The third insert pin 230 can be inserted into the second operating hole 3231 and fixedly coupled to the outer shaft 32, and the fourth insert pin 240 can be inserted into the third operating hole 622 and fixedly coupled to the mating sleeve 62. Through the setting of the second adjustment tool 200, a user can insert the third insert rod 230 into the second operation hole 3231 and fixedly connected with the outer shaft 32, insert the fourth insert rod 240 into the third operation hole 622 and fixedly connected with the mating sleeve 62, and rotate the second rotating rod 220 relative to the second sleeve 210 by driving the mating sleeve 62 to move on the outer shaft 32, so that the mating sleeve 62 can drive the second connection ring 61 to move, and the second end of the upper end plate 10 and the second end of the lower end plate 20 can approach each other or move away from each other to adjust the height and angle of the intervertebral prosthesis.
In other embodiments, the first adjusting tool 100 includes a first sleeve 110, a first rotating rod 120 and a first inserting rod 130, the first rotating rod 120 is rotatably and movably disposed in the first sleeve 110 along the axial direction of the first sleeve 110, the first inserting 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 with the inner shaft 31, and the first inserting rod 130 can be inserted into the second operating hole 3231 and fixedly connected with the outer shaft 32. Or the second adjusting tool 200 includes a second sleeve 210, a second rotating rod 220, a third insert rod 230 and a fourth insert rod 240, the second rotating rod 220 is rotatably and movably disposed in the second sleeve 210 along the axial direction of the second sleeve 210, the third insert rod 230 is disposed on the second rotating rod 220, and the fourth insert rod 240 is disposed on the second sleeve 210. The third insert pin 230 can be inserted into the second operating hole 3231 and fixedly coupled to the outer shaft 32, and the fourth insert pin 240 can be inserted into the third operating hole 622 and fixedly coupled to the mating sleeve 62.
The present application also provides an intervertebral prosthesis assembly, as shown in fig. 11 to 13, which includes an intervertebral prosthesis, and a buttress plate adjusting tool 300 detachably provided with the intervertebral prosthesis, the intervertebral prosthesis being the above-described intervertebral prosthesis. The intervertebral prosthesis can solve the problem that the intervertebral prosthesis in the related technology is difficult to match with the natural angle of the intervertebral space, so that the use stability of the intervertebral prosthesis is reduced, and the intervertebral prosthesis component with the intervertebral prosthesis can solve the same technical problem. The support plate adjustment tool 300 includes a tool body 310, a first plug rod 320, a second plug rod 330, and a clamping member 340. The first inserting and connecting rod 320 is disposed on the tool body 310, the second inserting and connecting rod 330 is movably disposed on the tool body 310, the first inserting and connecting rod 320 can be inserted into the first fixing hole 811 and fixedly connected with the first supporting block 81, the second inserting and connecting rod 330 can be inserted into the second fixing hole 821 and fixedly connected with the second supporting block 82, and the clamping member 340 is movably disposed on the tool body 310 and drives the second inserting and connecting rod 330 to be close to the first inserting and connecting rod 320. By the design of the support plate adjustment tool 300, an efficient adjustment of the support plate 80 is achieved. The user can insert the first insertion rod 320 into the first fixing hole 811 and fixedly connect with the first support block 81, and insert the second insertion rod 330 into the second fixing hole 821 and fixedly connect with the second support block 82. Prior to placement of the buttress plate 80 between the upper endplate 10 and the lower endplate 20, the placement of the buttress plate 80 is facilitated by adjusting the positions of the first and second buttress blocks 81, 82 and driving the second docking rod 330 adjacent the first docking rod 320 by controlling the clamping member 340 to enable the first buttress block 81 to be adjacent the second buttress block 82. After the buttress plate 80 is placed between the upper endplate 10 and the lower endplate 20, the buttress plate adjustment tool 300 is separated from the buttress plate 80 to enable the resilient member 83 of the buttress plate 80 to be supported between the upper endplate 10 and the lower endplate 20 by the force of the resilient force. Thus, the adjusting process is more stable, and the operating efficiency is improved.
As shown in fig. 11 to 13, the tool body 310 is provided with a guide hole 313, and the second insertion link 330 is movably disposed in the guide hole 313 and is in guide engagement with the guide hole 313. The guide hole 313 is provided to facilitate 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 operations of the first support block 81 and the second support block 82 are more controllable. The tool main body 310 is provided with a third threaded hole 314, the clamping piece 340 comprises a screw 341 and a stop block 342 arranged at one end of the screw 341, the screw 341 is in threaded fit with the third threaded hole 314, the second inserting and connecting rod 330 is arranged on the screw 341 in a penetrating mode, and the second inserting and connecting rod 330 is in stop fit with the stop block 342. Like this, make clamping piece 340 can drive the dog 342 and carry out telescopic movement for tool main part 310 when rotating to drive second supporting shoe 82 through the dog 342 and remove, make the regulation operation more smooth and easy, improved availability factor.
In some embodiments, since the first inserting rod 320 is fixedly connected to the first supporting block 81, the second inserting rod 330 is fixedly connected to the second supporting block 82, and the elastic member 83 is disposed between the first supporting block 81 and the second supporting block 82, the second inserting rod 330 is subject to the elastic force of the elastic member 83 and abuts against the stop block 342. When the stop block 342 performs the telescopic movement in the tool body 310, the second inserting-connecting rod 330 can be driven to approach or separate from the first inserting-connecting rod 320, so as to control the distance between the first supporting block 81 and the second supporting block 82. The stopper 342 is a polyhedral block, and the intervertebral prosthesis further includes a pressurizing tool for rotating the stopper 342, a polygonal hole matched with the polyhedral block is formed in the pressurizing tool, and the stopper 342 can be driven to rotate by swinging the pressurizing tool.
In other embodiments, the tool body 310 is provided with a guide hole 313, and the second insertion rod 330 is movably disposed in the guide hole 313 and is in guide engagement with the guide hole 313. Or the tool main body 310 is provided with a third threaded hole 314, the clamping piece 340 comprises a screw 341 and a stop block 342 arranged at one end of the screw 341, the screw 341 is in threaded fit with the third threaded hole 314, the second inserting and connecting rod 330 is arranged on the screw 341 in a penetrating mode, and the second inserting and connecting rod 330 is in stop fit with the stop block 342. In some embodiments, the intervertebral prosthesis is used by removing the buttress plate 80 from between the upper endplate 10 and the lower endplate 20 prior to implantation, placing the upper movable plate 12 in the first retracted position, and placing the lower movable plate 22 in the second retracted position, such that the distance between the upper endplate 10 and the lower endplate 20 is reduced by use of the first adjustment tool 100 and the second adjustment tool 200, so that the overall height of the intervertebral prosthesis is reduced, and placing the intervertebral prosthesis within the human intervertebral space. The distance and angle between the upper endplate 10 and the lower endplate 20 are adjusted using the first and second adjustment tools 100, 200 to enable the intervertebral prosthesis to match the shape of the human intervertebral space, and the buttress plate 80 is placed between the upper endplate 10 and the lower endplate 20 using the buttress plate adjustment tool 300 to switch the upper movable plate 12 to the first, convex position and the lower movable plate 22 to the second, convex position. After buttress plate 80 is disposed between upper endplate 10 and lower endplate 20, bone cement is injected into the receiving cavity through injection port 842, and closure plug 85 is inserted into injection port 842, thereby allowing the relative positions of first buttress block 81 and second buttress block 82 to be fixed.
In the description of the present invention, it is to be understood that "plurality" means two in number, or more than two. The directional terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal" and "top, bottom" etc. refer to a direction or a positional relationship generally based on that shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation or be constructed and operated in a specific orientation, and thus are not to be construed as limiting the scope of the invention, but rather the directional terms "inside and outside" refer to inside and outside with respect to the outline of the respective element itself.
Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (15)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511159540.9A CN120713683A (en) | 2025-08-19 | 2025-08-19 | Intervertebral prosthesis and intervertebral prosthesis component |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511159540.9A CN120713683A (en) | 2025-08-19 | 2025-08-19 | Intervertebral prosthesis and intervertebral prosthesis component |
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| Publication Number | Publication Date |
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| CN120713683A true CN120713683A (en) | 2025-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202511159540.9A Pending CN120713683A (en) | 2025-08-19 | 2025-08-19 | Intervertebral prosthesis and intervertebral prosthesis component |
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| Country | Link |
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| CN (1) | CN120713683A (en) |
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- 2025-08-19 CN CN202511159540.9A patent/CN120713683A/en active Pending
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