Intervertebral support tools

Abstract

The present invention provides an intervertebral support tool, comprising: an upper support plate; a lower support plate; a pusher, abutting between the first end of the upper support plate and the first end of the lower support plate; a sleeve, a first end of which abuts between the second end of the upper support plate and the second end of the lower support plate; an adjustment rod, movably arranged, the first end of the adjustment rod is connected to the pusher, the adjustment rod moves and drives the pusher to approach or move away from the sleeve along the axial direction of the sleeve, and the pusher and the first end of the sleeve jointly push the upper support plate and the lower support plate away from or close to each other; a limiter, movably arranged on the sleeve to have a limit position and an avoidance position; when the limiter is in the limit position, the limiter cooperates with the adjustment rod to prevent the adjustment rod from escaping from the sleeve; when the limiter is in the avoidance position, the limiter avoids the adjustment rod so that the adjustment rod can be taken out of the sleeve. The technical solution of the present application effectively solves the problem of low adaptability of the intervertebral support member in the related art.

Description

Technical Field

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

[0002] It is quite mature to treat intervertebral disc degeneration by implanting an intervertebral support member into the intervertebral space to support the intervertebral space.

[0003] The intervertebral support member in the related art is an integrated prosthesis, and the height of the intervertebral support member is a fixed value. Therefore, it is necessary to measure the height of the intervertebral space before or during the operation, and prepare multiple intervertebral support members with a height close to the measured intervertebral space height. Then, according to the actual situation, the intervertebral support member of the appropriate height is selected and placed in the intervertebral space.

[0004] Since there is an error in measuring the height of the intervertebral space, it is necessary to prepare a plurality of intervertebral support members with a height close to the measured height of the intervertebral space for easy access, which results in a low degree of adaptability of the intervertebral support members. Summary of the invention

[0005] The main purpose of the present invention is to provide an intervertebral support tool to solve the problem of low adaptability of the intervertebral support member in the related art.

[0006] In order to achieve the above-mentioned objectives, the present invention provides an intervertebral support tool, comprising: an upper support plate; a lower support plate, which is arranged opposite to the upper support plate and is located below the upper support plate; a pushing member, which abuts between the first end of the upper support plate and the first end of the lower support plate; a sleeve, wherein the first end of the sleeve abuts between the second end of the upper support plate and the second end of the lower support plate; an adjusting rod, which passes through the sleeve, and the adjusting rod is movably arranged, the first end of the adjusting rod is connected to the pushing member, the adjusting rod moves and drives the pushing member to approach or move away from the sleeve along the axial direction of the sleeve, and the pushing member and the first end of the sleeve jointly push the upper support plate and the lower support plate so that the upper support plate and the lower support plate move away from or approach each other; a limiting member, which is movably arranged on the sleeve to have a limiting position and an avoidance position; when the limiting member is in the limiting position, the limiting member and the adjusting rod limit cooperation prevent the adjusting rod from escaping from the sleeve; when the limiting member is in the avoidance position, the limiting member avoids the adjusting rod so that the adjusting rod can be taken out of the sleeve.

[0007] Furthermore, the sleeve is provided with an avoidance opening which passes through the side wall of the sleeve, and the adjusting rod is provided with a limiting groove; when the limiting member is in the limiting position, the limiting member extends into the avoidance opening and cooperates with the limiting groove in limiting manner.

[0008] Furthermore, the limiting member includes a first clamp arm, a second clamp arm spaced apart from the first clamp arm, and a connecting plate connected between the first clamp arm and the second clamp arm, and the first clamp arm abuts and cooperates with the outer surface of the sleeve; when the limiting member is in the limiting position, the second clamp arm extends into the avoidance opening and cooperates with the limiting groove; when the limiting member is in the avoidance position, the second clamp arm avoids and cooperates with the adjusting rod.

[0009] Furthermore, the first clamping arm is provided with a first groove and a second groove which can be adapted to the outer wall of the sleeve, and the first groove and the second groove are spaced apart along the extension direction of the first clamping arm, and the opening of the first groove and the opening of the second groove are both facing the sleeve; when the sleeve contacts the first groove and the second clamping arm is limitedly matched with the limiting groove, the limiting member is in the limiting position; when the sleeve contacts the second groove and the second clamping arm is avoidedly matched with the adjusting rod, the limiting member is in the avoidance position.

[0010] Furthermore, the second clamping arm includes a first plate segment connected to the connecting plate and a second plate segment connected to the first plate segment, and the first plate segment is located on a side of the second plate segment close to the first clamping arm; when the first plate segment extends into the limiting groove and cooperates with the limiting groove, the second plate segment is located on one side of the avoidance opening, and the first clamping arm contacts the outer wall of the sleeve, the limiting member is in the limiting position; when the second plate segment is located in the avoidance opening and cooperates with the limiting groove, the first plate segment is located on one side of the avoidance opening, and the first clamping arm contacts the outer wall of the sleeve, the limiting member is in the avoidance position.

[0011] Furthermore, the connecting piece is connected between the first end of the first clamp arm and the first end of the second clamp arm, and a deformation opening is formed between the second end of the first clamp arm and the second end of the second clamp arm; and / or, the limiting groove is an annular groove arranged around the outside of the adjusting rod.

[0012] Furthermore, the intervertebral support tool also includes an abutment member disposed on the first end of the sleeve, the abutment member abuts between the second end of the upper support plate and the second end of the lower support plate, and the pushing member approaches the abutment member to move the upper support plate and the lower support plate away from each other.

[0013] The cam is an assembly made of a plurality of first and second sliding members, each of which is adapted to move the first sliding member toward the support frame, the second sliding member being adapted to move the first sliding member toward the support frame.

[0014] Furthermore, the upper surface of the upper support plate is an arc-shaped surface having a highest point and a center point, the highest point being located between the center point and the first end of the upper support plate; and / or, the second end of the sleeve is provided with a first gripping protrusion, the second end of the adjusting rod extends out of the sleeve, and a second gripping protrusion is provided on the second end of the adjusting rod.

[0015] Furthermore, a threaded hole is provided on the pushing member, and a threaded section that can cooperate with the threaded hole is provided on the first end of the adjusting rod. The adjusting rod rotates one circle to make the upper support plate and the lower support plate move away from or approach each other by a preset distance; a counter is provided on the sleeve, and the counter can record the number of rotations of the adjusting rod to calculate the distance value of the upper support plate and the lower support plate moving away from or approaching each other.

[0016] The technical solution of the present invention is applied, and the intervertebral support tool includes: an upper support plate, a lower support plate, a pusher, a sleeve, an adjustment rod and a limiter. The lower support plate is arranged opposite to the upper support plate and is located below the upper support plate. The pusher abuts between the first end of the upper support plate and the first end of the lower support plate. The first end of the sleeve abuts between the second end of the upper support plate and the second end of the lower support plate. The adjustment rod passes through the sleeve, and the adjustment rod is movably arranged. The first end of the adjustment rod is connected to the pusher, and the adjustment rod moves and drives the pusher to approach or move away from the sleeve along the axial direction of the sleeve. The pusher and the first end of the sleeve jointly push the upper support plate and the lower support plate so that the upper support plate and the lower support plate move away from or approach each other. The limiter is movably arranged on the sleeve to have a limit position and an avoidance position. When the limiter is in the limit position, the limiter cooperates with the adjustment rod to prevent the adjustment rod from coming out of the sleeve. When the limiter is in the avoidance position, the limiter avoids the adjustment rod so that the adjustment rod can be taken out of the sleeve. In this way, by driving the adjusting rod to move, the pusher can be driven to move closer to or away from the sleeve, so that the upper support plate and the lower support plate move away from or closer to each other, thereby adjusting the height of the intervertebral support tool to facilitate the support of the intervertebral space. The operator can hold the sleeve with one hand and drive the adjusting rod with the other hand, which is simple to operate. In this way, the problem of needing to prepare multiple intervertebral support members in the related art is avoided, and the adaptability of the intervertebral support members is improved. Therefore, the technical solution of the present application effectively solves the problem of low adaptability of the intervertebral support members in the related art. In addition, through the setting of the limiting member, when the limiting member is switched to the limiting position, the limiting member can limit the adjusting rod in the sleeve to reduce the possibility of the adjusting rod coming out of the sleeve when it moves in the sleeve, so that the driving of the upper support plate and the lower support plate by the adjusting rod is more stable and reliable. When the limiting member is switched to the avoidance position, the adjusting rod can be taken out of the sleeve, which is convenient for disassembly and cleaning of the intervertebral support tool, so that the disinfection and sterilization of the intervertebral support tool is more thorough. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the exploded structure of an embodiment of an intervertebral support tool according to the present invention is shown;

[0019] Figure 2 Shows Figure 1 A schematic diagram of the three-dimensional structure of an intervertebral support tool;

[0020] Figure 3 Shows Figure 1 A schematic diagram of the exploded structure of the upper support plate and the lower support plate of the intervertebral support tool;

[0021] Figure 4 Shows Figure 1 A schematic diagram of the three-dimensional structure of the limiting member of the intervertebral support tool;

[0022] Figure 5 Shows Figure 1 A schematic diagram of the exploded structure of the intervertebral support tool at the stopper;

[0023] Figure 6 Shows Figure 1 A schematic diagram of the three-dimensional structure of the upper support plate and the pushing member of the intervertebral support tool;

[0024] Figure 7 Shows Figure 1 Schematic diagram of the three-dimensional structure of the upper support plate and the abutment member of the intervertebral support tool.

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

[0026] 10. Upper support plate; 11. First sliding block; 111. First anti-slip groove; 12. Second sliding block; 121. Second anti-slip groove;

[0027] 20. Lower support plate;

[0028] 30. Pushing member; 31. First sliding groove; 32. First anti-slip protrusion;

[0029] 40. sleeve; 41. avoidance opening; 42. abutment member; 43. second slide groove; 431. second anti-slip protrusion; 44. first grip protrusion;

[0030] 50. Adjustment rod; 51. Limiting groove; 52. Second gripping protrusion;

[0031] 60. Limiting member; 61. First clamping arm; 611. First groove; 612. Second groove; 621. First plate segment; 622. Second plate segment; 63. Connecting piece; 64. Deformation opening. DETAILED DESCRIPTION

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

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

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

[0035] like Figures 1 to 7 As shown, the technical solution of this embodiment is applied, and the intervertebral support tool includes: an upper support plate 10, a lower support plate 20, a pusher 30, a sleeve 40, an adjustment rod 50 and a stopper 60. The lower support plate 20 is arranged opposite to the upper support plate 10 and is located below the upper support plate 10. The pusher 30 abuts between the first end of the upper support plate 10 and the first end of the lower support plate 20. The first end of the sleeve 40 abuts between the second end of the upper support plate 10 and the second end of the lower support plate 20. The adjustment rod 50 passes through the sleeve 40, and the adjustment rod 50 is movably arranged. The first end of the adjustment rod 50 is connected to the pusher 30, and the adjustment rod 50 moves and drives the pusher 30 to approach or move away from the sleeve 40 along the axial direction of the sleeve 40. The first ends of the pusher 30 and the sleeve 40 jointly push the upper support plate 10 and the lower support plate 20, so that the upper support plate 10 and the lower support plate 20 move away from or approach each other. The limiting member 60 is movably disposed on the sleeve 40 to have a limiting position and an escape position. When the limiting member 60 is in the limiting position, the limiting member 60 and the adjusting rod 50 are limitedly matched to prevent the adjusting rod 50 from coming out of the sleeve 40. When the limiting member 60 is in the escape position, the limiting member 60 escapes the adjusting rod 50 so that the adjusting rod 50 can be taken out of the sleeve 40.

[0036] In this way, by driving the adjusting rod 50 to move, the pushing member 30 can be driven to move closer to or away from the sleeve 40, so that the upper support plate 10 and the lower support plate 20 move away from or closer to each other, thereby adjusting the height of the intervertebral support tool to facilitate the support of the intervertebral space. The operator can hold the sleeve 40 with one hand and drive the adjusting rod 50 with the other hand, which is simple to operate. In this way, the problem of needing to prepare multiple intervertebral support members in the related art is avoided, and the adaptability of the intervertebral support members is improved. Therefore, the technical solution of this embodiment effectively solves the problem of low adaptability of the intervertebral support members in the related art. In addition, through the setting of the limiting member 60, when the limiting member 60 is switched to the limiting position, the limiting member 60 can limit the adjusting rod 50 in the sleeve 40 to reduce the possibility of the adjusting rod 50 coming out of the sleeve 40 when it moves in the sleeve 40, so that the driving of the upper support plate 10 and the lower support plate 20 by the adjusting rod 50 is more stable and reliable. When the limiting member 60 is switched to the avoidance position, the adjusting rod 50 can be taken out from the sleeve 40, thereby facilitating the disassembly and cleaning of the intervertebral support tool, and making the disinfection and sterilization of the intervertebral support tool more thorough.

[0037] like Figures 1 to 7 As shown, the sleeve 40 is provided with an escape opening 41 penetrating the side wall of the sleeve 40, and the adjusting rod 50 is provided with a limiting groove 51. When the limiting member 60 is in the limiting position, the limiting member 60 extends into the escape opening 41 and cooperates with the limiting groove 51. The structures of the escape opening 41 and the limiting groove 51 are simple and easy to process. The setting of the escape opening 41 can facilitate the switching of the limiting member 60 to the limiting position, and facilitate the limiting member 60 to pass through the escape opening 41 and extend into the limiting groove 51. The setting of the limiting groove 51 can limit the displacement of the adjusting rod 50 along its axial direction, so as to avoid the problem that the adjusting rod 50 falls out of the sleeve 40 when the intervertebral support tool supports the intervertebral space.

[0038] like Figures 1 to 7 As shown, the limiting member 60 includes a first clamp arm 61, a second clamp arm spaced apart from the first clamp arm 61, and a connecting piece 63 connected between the first clamp arm 61 and the second clamp arm, and the first clamp arm 61 is in abutment with the outer surface of the sleeve 40. When the limiting member 60 is in the limiting position, the second clamp arm extends into the avoidance opening 41 and is in a limiting position with the limiting groove 51. When the limiting member 60 is in the avoiding position, the second clamp arm is in a avoiding position with the adjusting rod 50. The limiting member 60 has a simple structure and is easy to process. The setting of the first clamp arm 61 facilitates the abutment with the outer surface of the sleeve 40, so that the second clamp arm can be more stably and reliably maintained in the limiting groove 51, so as to maintain the limiting member 60 in the limiting position.

[0039] like Figures 1 to 7As shown, the first clamp arm 61 is provided with a first groove 611 and a second groove 612 that can be matched with the outer side wall of the sleeve 40. The first groove 611 and the second groove 612 are arranged at intervals along the extension direction of the first clamp arm 61, and the opening of the first groove 611 and the opening of the second groove 612 are both facing the sleeve 40. When the sleeve 40 contacts the first groove 611, and the second clamp arm is limitedly matched with the limiting groove 51, the limiting member 60 is in the limiting position. When the sleeve 40 contacts the second groove 612, and the second clamp arm is avoided and matched with the adjusting rod 50, the limiting member 60 is in the avoidance position. In this way, the provision of the first groove 611 and the second groove 612 increases the contact area between the first clamp arm 61 and the outer side wall of the sleeve 40, so that the limiting member 60 can be better maintained in the limiting position or the avoidance position when not subject to external force.

[0040] like Figures 1 to 7 As shown, the second clamping arm includes a first plate segment 621 connected to the connecting piece 63 and a second plate segment 622 connected to the first plate segment 621, and the first plate segment 621 is located at a side of the second plate segment 622 close to the first clamping arm 61. When the first plate segment 621 extends into the limiting groove 51 and is limitedly matched with the limiting groove 51, the second plate segment 622 is located at one side of the avoidance opening 41, and the first clamping arm 61 contacts the outer side wall of the sleeve 40, the limiting member 60 is in the limited position. When the second plate segment 622 is located in the avoidance opening 41 and is avoided and matched with the limiting groove 51, the first plate segment 621 is located at one side of the avoidance opening 41, and the first clamping arm 61 contacts the outer side wall of the sleeve 40, the limiting member 60 is in the avoidance position. In this way, the structures of the first plate segment 621 and the second plate segment 622 are simple and easy to process. Furthermore, since the first plate segment 621 is located at a side of the second plate segment 622 close to the first clamp arm 61, the distance between the first plate segment 621 and the first clamp arm 61 is smaller than the distance between the second plate segment 622 and the first clamp arm 61, so that when the first plate segment 621 extends into the avoidance opening 41, the first plate segment 621 can continue to extend into the limiting groove 51 and cooperate with the limiting groove 51 to limit the adjustment rod 50 in the sleeve 40. Since the first plate segment 621 is located at a side of the second plate segment 622 close to the first clamp arm 61, the distance between the second plate segment 622 and the first clamp arm 61 is larger than the distance between the first plate segment 621 and the first clamp arm 61, so that when the second plate segment 622 extends into the avoidance opening 41, the second plate segment 622 can avoid the limiting groove 51, so that the adjustment rod 50 can be taken out of the sleeve 40.

[0041] like Figures 1 to 7As shown, the connecting piece 63 is connected between the first end of the first clamp arm 61 and the first end of the second clamp arm, and a deformed opening 64 is formed between the second end of the first clamp arm 61 and the second end of the second clamp arm. The arrangement of the deformed opening 64 facilitates the installation and removal of the stopper 60 on the sleeve 40, further simplifying the operation of using, cleaning and installing the intervertebral support tool. The stopper groove 51 is an annular groove arranged around the outside of the adjustment rod 50 to better limit the displacement of the adjustment rod 50 along its axial direction.

[0042] In other embodiments, the connecting piece 63 is connected between the first end of the first clamp arm 61 and the first end of the second clamp arm, and a deformation opening 64 is formed between the second end of the first clamp arm 61 and the second end of the second clamp arm. Alternatively, the limiting groove 51 is an annular groove arranged around the outer side of the adjusting rod 50.

[0043] like Figures 1 to 7 As shown, the intervertebral support tool also includes an abutment member 42 disposed on the first end of the sleeve 40, the abutment member 42 abuts between the second end of the upper support plate 10 and the second end of the lower support plate 20, and the pusher 30 approaches the abutment member 42 to move the upper support plate 10 and the lower support plate 20 away from each other. The abutment member 42 is disposed so as to be adapted to the shapes of the second end of the upper support plate 10 and the second end of the lower support plate 20, so that when the first end of the sleeve 40 and the abutment member 42 move relative to each other, the abutment member 42 disposed on the first end of the sleeve 40 can better fit with the second end of the upper support plate 10 and the second end of the lower support plate 20, so that the upper support plate 10 and the lower support plate 20 can move more smoothly.

[0044] like Figures 1 to 7As shown, a first slide groove 31 is provided on the push member 30, and a first slider 11 located in the first slide groove 31 is provided on the upper support plate 10. When the upper support plate 10 and the lower support plate 20 move away from or approach each other, the first slider 11 slides and cooperates with the first slide groove 31. The opening of the first slide groove 31 is arranged toward the upper support plate 10, and the push member 30 is also provided with a first anti-slip protrusion 32 located on the groove side wall of the first slide groove 31. A first anti-slip groove 111 is provided on the first slider 11, and the first anti-slip protrusion 32 is movably arranged in the first anti-slip groove 111 and cooperates with the first anti-slip groove 111 to prevent slipping. The first anti-slip protrusion 32 and the first anti-slip groove 111 are arranged so that when the first slider 11 slides in the first slide groove 31, the first anti-slip protrusion 32 can be hooked with the first anti-slip groove 111, so that the pusher 30 and the upper support plate 10 can be better fitted, avoiding the problem of the first slider 11 being separated from the first slide groove 31, so that the first slider 11 can slide in the first slide groove 31 more reliably, reducing the problem of the pusher 30 being separated from the upper support plate 10, and realizing the self-locking of the pusher 30 and the upper support plate 10. The above arrangement increases the contact surface between the pusher 30 and the upper support plate 10, increases the friction between the pusher 30 and the upper support plate 10, and increases the separation force between the pusher 30 and the upper support plate 10, which plays a role in better structural and mechanical performance and coordination. When the distance between the upper support plate 10 and the lower support plate 20 is the largest, the upper support plate 10 and the pusher 30 can also be reliably connected. The abutment member 42 is provided with a second slide groove 43, and the upper support plate 10 is provided with a second slider 12 located in the second slide groove 43. When the upper support plate 10 and the lower support plate 20 move away from or approach each other, the second slider 12 slides and cooperates with the second slide groove 43. The opening of the second slide groove 43 is arranged toward the upper support plate 10, and the abutment member 42 is further provided with a second anti-slip protrusion 431 located on the groove side wall of the second slide groove 43. The second slider 12 is provided with a second anti-slip groove 121, and the second anti-slip protrusion 431 is movably arranged in the second anti-slip groove 121 and cooperates with the second anti-slip groove 121 to prevent slipping. The second anti-slip protrusion 431 and the second anti-slip groove 121 are arranged so that when the second slider 12 slides in the second slide groove 43, the second anti-slip protrusion 431 can be hooked with the second anti-slip groove 121, so that the abutment 42 and the upper support plate 10 can be better fitted, avoiding the problem of the second slider 12 being separated from the second slide groove 43, so that the second slider 12 can slide in the second slide groove 43 more reliably, reducing the problem of the abutment 42 being separated from the upper support plate 10, and realizing the self-locking of the abutment 42 and the upper support plate 10. The above arrangement increases the contact surface between the abutment 42 and the upper support plate 10, increases the friction between the abutment 42 and the upper support plate 10, and increases the separation force between the abutment 42 and the upper support plate 10, which plays a role in better structural and mechanical performance and coordination.When the distance between the upper support plate 10 and the lower support plate 20 is maximized, the upper support plate 10 and the abutment member 42 can also be reliably connected.

[0045] In other embodiments, a first slide groove 31 is provided on the pushing member 30, and a first slider 11 located in the first slide groove 31 is provided on the upper support plate 10; when the upper support plate 10 and the lower support plate 20 move away from or approach each other, the first slider 11 slides and cooperates with the first slide groove 31; the opening of the first slide groove 31 is arranged toward the upper support plate 10, and the pushing member 30 is also provided with a first anti-slip protrusion 32 located on the side wall of the first slide groove 31; a first anti-slip groove 111 is provided on the first slider 11, and the first anti-slip protrusion 32 is movably arranged in the first anti-slip groove 111 and cooperates with the first anti-slip groove 111 to prevent slipping. Alternatively, a second slide groove 43 is provided on the abutment 42, and a second slider 12 located in the second slide groove 43 is provided on the upper support plate 10; when the upper support plate 10 and the lower support plate 20 move away from or approach each other, the second slider 12 slides and cooperates with the second slide groove 43; the opening of the second slide groove 43 is arranged toward the upper support plate 10, and the abutment 42 is further provided with a second anti-slip protrusion 431 located on the groove side wall of the second slide groove 43; a second anti-slip groove 121 is provided on the second slider 12, and the second anti-slip protrusion 431 is movably arranged in the second anti-slip groove 121 and cooperates with the second anti-slip groove 121 to prevent slipping.

[0046] like Figures 1 to 7 As shown, the upper surface of the upper support plate 10 is an arc-shaped surface, and the arc-shaped surface has a highest point and a center point, and the highest point is located between the center point and the first end of the upper support plate 10. In this way, the intervertebral support tool can be more compatible with the human vertebrae and conform to the shape of the human skeleton, so that the intervertebral support tool can open the intervertebral space more reasonably and reliably, and increase the contact area between the upper support plate 10 and the human bone to achieve good adhesion and support. In addition, the upper surface of the upper support plate 10 is an arc-shaped surface, which can reduce the damage caused by the upper support plate 10 to the nerve spinal cord during placement and removal. The second end of the sleeve 40 is provided with a first gripping protrusion 44, and the second end of the adjusting rod 50 extends out of the sleeve 40, and the second end of the adjusting rod 50 is provided with a second gripping protrusion 52. The first gripping protrusion 44 and the second gripping protrusion 52 are provided to facilitate the gripping of the operator. The operator can hold the first gripping protrusion 44 on the sleeve 40 with one hand and hold the second gripping protrusion 52 on the adjustment rod 50 with the other hand to drive the adjustment rod 50 to rotate relative to the sleeve 40. In addition, the provision of the first gripping protrusion 44 and the second gripping protrusion 52 can facilitate the operator to observe the number of rotations of the adjustment rod 50 relative to the sleeve 40, so as to facilitate the operator to calculate the distance between the upper support plate 10 and the lower support plate 20.

[0047] In this embodiment, the center point of the arc surface refers to the midpoint of the arc surface in the direction from the first end of the upper support plate 10 to the second end of the upper support plate 10. The upper support plate 10 has the same structure as the lower support plate 20. The upper support plate 10 adopts a wedge-shaped structure.

[0048] In other embodiments, the upper surface of the upper support plate 10 is an arcuate surface, the arcuate surface has a highest point and a center point, and the highest point is located between the center point and the first end of the upper support plate 10. Alternatively, the second end of the sleeve 40 is provided with a first gripping protrusion 44, the second end of the adjustment rod 50 extends out of the sleeve 40, and the second end of the adjustment rod 50 is provided with a second gripping protrusion 52.

[0049] like Figures 1 to 7 As shown, a threaded hole is provided on the pusher 30, and a threaded section capable of cooperating with the threaded hole is provided on the first end of the adjusting rod 50. The adjusting rod 50 rotates one circle to make the upper support plate 10 and the lower support plate 20 move away from or approach each other by a preset distance. A counter is provided on the sleeve 40, and the counter can record the number of rotations of the adjusting rod 50 to calculate the distance value of the upper support plate 10 and the lower support plate 20 moving away from or approaching each other. In this way, the operator can calculate the distance between the upper support plate 10 and the lower support plate 20 at this time according to the number of rotations of the adjusting rod 50 and the value of the counter. In this embodiment, after the operator rotates the adjusting rod 50, the counter is screwed to record the distance between the upper support plate 10 and the lower support plate 20 at this time.

[0050] In other embodiments, the upper support plate 10 includes a support frame and a porous structure connected to the support frame, and the porous structure includes a plurality of connecting holes connecting the upper and lower surfaces of the upper support plate 10. The porous structure is a trabecular structure, and the trabecular structure has a rough surface similar to a cancellous bone structure. The support frame includes a frame, a plurality of first protrusions and a plurality of second protrusions respectively arranged on opposite sides of the frame, and a plurality of reinforcing beams connected between the first protrusions and the second protrusions. The plurality of first protrusions correspond to the plurality of second protrusions one by one. The porous structure includes a porous base layer and a plurality of third protrusions arranged on the porous base layer, each third protrusion is located between the corresponding first protrusion and the second protrusion, and is located below the corresponding reinforcing beam. The setting of the frame can better support the intervertebral space and improve the structural strength of the intervertebral prosthesis. The first protrusion and the second protrusion can connect and support the reinforcing beam, so that the setting of the reinforcing beam is more stable. The reinforcing beam can support the intervertebral space, and further make the structural strength of the intervertebral prosthesis more reliable. The setting of the third protrusion of the porous structure can facilitate the bone growth of autologous bone while the reinforcing beam supports the intervertebral space. In this way, through the above-mentioned arrangement, the intervertebral prosthesis can ensure the structural strength of the intervertebral prosthesis under the premise of being able to cooperate with the autologous bone growth, and the reliability of the upper support plate 10 in supporting the intervertebral space is guaranteed by the arrangement of the reinforcing beam. And the intervertebral prosthesis has a good elastic modulus. A plurality of first protrusions, a plurality of second protrusions, a plurality of third protrusions and a plurality of reinforcing beams form a tooth-shaped structure. The arrangement of the tooth-shaped structure increases the contact area between the intervertebral prosthesis and the autologous bone, and the arrangement of the tooth-shaped structure reduces the possibility of relative sliding between the intervertebral prosthesis and the autologous bone, so that the intervertebral prosthesis can be arranged in the intervertebral space more stably and reliably. The tooth-shaped structure is a wavy tooth-shaped structure. The upper support plate 10 is a combination of a solid structure and a porous structure, and the top of each wavy tooth-shaped structure adopts a solid edge sealing design to ensure the strength of the porous structure.

[0051] The head of the pusher 30 is sharpened to facilitate placing the pusher block into the intervertebral space from the head.

[0052] The inventors found that with the continuous aging of society, more and more people suffer from spinal injuries, slippage and other diseases. The most effective treatment method at present is to use a pedicle fixation system to reset the slipped vertebra and implant a prosthesis into the intervertebral space for intervertebral fusion fixation, and finally restore the normal sagittal sequence and force line relationship of the spine, and relieve the traction and compression of the nerve roots. For patients with obvious slippage, the intervertebral space needs to be opened to reset the slippage. The method used in the related art for opening is to first drive pedicle screws into the pedicles of two adjacent vertebrae, and then expand the intervertebral space by applying force to the nail tail of the pedicle screw. This method is easy to cause the intervertebral space to form a wedge shape with a narrow front and a wide back in actual operation, and due to the obstruction of the instrument itself, it is not conducive to observation and subsequent related operations, and it is very inconvenient to implement.

[0053] In this embodiment, the intervertebral support tool adopts an additive manufacturing process so that the intervertebral support tool can adjust the opening height under the minimally invasive channel. The intervertebral support tool opens the movable main slide rail through the upper support plate 10 and the lower support plate 20. The adjustable structure and mechanism of the intervertebral support tool can be realized by the cooperation of the pusher 30, the sleeve 40 and the adjustment rod 50. The intervertebral support tool uses laser or high-energy electron beam rapid prototyping technology, high-temperature sintering, chemical corrosion, electrochemical deposition and other technologies. Other processing methods include precision casting, welding, mechanical cutting, discharge machining, etc.; the hydroxyapatite coating is obtained by high-temperature spraying or electrochemical deposition. It is made of medical metals, including but not limited to titanium and titanium alloys, cobalt alloys, medical stainless steel and other materials. It is made of medical metals, including but not limited to titanium and titanium alloys, cobalt alloys, medical stainless steel and other materials.

[0054] In this embodiment, the pusher 30 includes a pusher block and a connecting shaft connected to the pusher block, and the connecting shaft is sandwiched between the upper support plate 10 and the lower support plate 20. The pusher block abuts between the first end of the upper support plate 10 and the first end of the lower support plate 20. The sleeve 40 abuts between the second end of the upper support plate 10 and the second end of the lower support plate 20. A threaded hole is provided on the connecting shaft. A threaded section capable of cooperating with the threaded hole is provided on the adjusting rod 50. When the adjusting rod 50 rotates, the threaded section cooperates with the threaded hole to drive the pusher 30 to move so that the upper support plate 10 and the lower support plate 20 are close to or away from each other. The structure of the pusher block and the connecting shaft is simple and easy to process. A guide protrusion is provided on the connecting shaft, and a guide slideway capable of cooperating with the guide protrusion is provided on the upper support plate 10. The setting of the guide protrusion and the guide slideway can guide the movement of the upper support plate 10 so that the upper support plate 10 can move smoothly along a preset direction. The guide slideway runs through the upper and lower surfaces of the upper support plate 10. When the distance between the upper support plate 10 and the lower support plate 20 is the smallest, one end of the guide protrusion protrudes or is flush with the upper surface of the upper support plate 10. In this way, the minimum height of the intervertebral support tool can be effectively reduced, making the structure of the intervertebral support tool more compact. Lowering the initial height of the intervertebral support tool can facilitate the operation of placing the intervertebral support tool into the intervertebral space, reduce damage to the autologous bone, and further simplify the use and operation of the intervertebral support tool. The upper support plate 10 and the lower support plate 20 can be better buckled. The angle between the extension direction of the slide groove and the center line of the connecting shaft is 50°, which can achieve a small axial stroke to achieve a large radial height adjustment, an axial stroke of 3mm, and a height of 7mm. The height adjustment range between the upper support plate 10 and the lower support plate 20 is 7mm to 14mm, and a self-locking and self-stabilizing structural form can be achieved at the same time. There are four guide protrusions, and the four guide protrusions adopt an upper and lower mirror layout, and the front and rear guide protrusions are in a two-way array layout.

[0055] In this embodiment, the guide protrusion includes a guide section and a reinforcing rib connected between the guide section and the connecting shaft. The provision of the reinforcing rib improves the structural strength of the guide protrusion, making the guiding function of the guide protrusion more reliable. In this embodiment, the reinforcing rib is a triangular reinforcing support structure, which can provide better support and mechanical properties for the guide protrusion, and ensure the overall mechanical properties of the intervertebral prosthesis after expansion.

[0056] In this embodiment, the width of the intervertebral support tool is 8mm and the minimum height is 7mm, which can effectively reduce the obstruction of the intervertebral support tool itself, reduce the impact on the observation of the operation and the obstruction of subsequent related operations. In the elderly population with lumbar spondylolisthesis, when the bone quality is poor, the distraction position can be effectively selected to avoid damage to the bone, and at the same time, the loosening of the screw fixation caused by the distraction of the posterior screw is avoided. The intervertebral support tool has a scale of distraction distance, which can intuitively understand whether the final distraction height is consistent with the expected result before the operation.

[0057] In this embodiment, the upper support plate 10 and the lower support plate 20 adopt an asymmetric design. The upper support plate 10 has an arc-shaped anatomical design, and load-bearing sliding support surfaces are designed on the front and rear parts of the upper support plate 10 and the lower support plate 20. At the same time, the front and rear ends are respectively designed with a 50° slide groove and a slide rail design, with a slide groove and a slide rail at the front and rear respectively.

[0058] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0059] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0060] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intervertebral support tool, characterized in that: include: Upper support plate (10); A lower support plate (20) arranged opposite to the upper support plate (10) and located below the upper support plate (10); A pushing member (30) abutting between the first end of the upper support plate (10) and the first end of the lower support plate (20); a sleeve (40), wherein a first end of the sleeve (40) abuts between a second end of the upper support plate (10) and a second end of the lower support plate (20); an adjusting rod (50) passing through the sleeve (40), and the adjusting rod (50) is movably arranged, a first end of the adjusting rod (50) being connected to the pushing member (30), the adjusting rod (50) being movable and driving the pushing member (30) to approach or move away from the sleeve (40) along the axial direction of the sleeve (40), the pushing member (30) and the first end of the sleeve (40) jointly pushing the upper support plate (10) and the lower support plate (20) so that the upper support plate (10) and the lower support plate (20) move away from or approach each other; A limiting member (60) is movably arranged on the sleeve (40) to have a limiting position and an avoidance position; when the limiting member (60) is in the limiting position, the limiting member (60) and the adjusting rod (50) are limitedly matched to prevent the adjusting rod (50) from escaping from the sleeve (40); when the limiting member (60) is in the avoidance position, the limiting member (60) avoids the adjusting rod (50) so that the adjusting rod (50) can be taken out of the sleeve (40).

2. The intervertebral support tool according to claim 1, characterized in that: The sleeve (40) is provided with an escape opening (41) penetrating the side wall of the sleeve (40), and the adjustment rod (50) is provided with a limiting groove (51); when the limiting member (60) is in the limiting position, the limiting member (60) extends into the escape opening (41) and cooperates with the limiting groove (51) in a limiting manner.

3. The intervertebral support tool according to claim 2, characterized in that: The limiting member (60) comprises a first clamping arm (61), a second clamping arm spaced apart from the first clamping arm (61), and a connecting piece (63) connected between the first clamping arm (61) and the second clamping arm, wherein the first clamping arm (61) is in abutment with the outer surface of the sleeve (40); When the limiting member (60) is in the limiting position, the second clamping arm extends into the avoidance opening (41) and cooperates with the limiting groove (51) in a limiting manner; when the limiting member (60) is in the avoidance position, the second clamping arm cooperates with the adjusting rod (50) in an avoidance manner.

4. The intervertebral support tool according to claim 3, characterized in that: The first clamping arm (61) is provided with a first groove (611) and a second groove (612) which are adapted to match the outer wall of the sleeve (40); the first groove (611) and the second groove (612) are arranged at intervals along the extension direction of the first clamping arm (61); and the opening of the first groove (611) and the opening of the second groove (612) are both facing the sleeve (40); When the sleeve (40) contacts the first groove (611) and the second clamping arm is in limiting cooperation with the limiting groove (51), the limiting member (60) is in the limiting position; when the sleeve (40) contacts the second groove (612) and the second clamping arm is in avoiding cooperation with the adjusting rod (50), the limiting member (60) is in the avoiding position.

5. The intervertebral support tool according to claim 3, characterized in that: The second clamping arm comprises a first plate segment (621) connected to the connecting piece (63) and a second plate segment (622) connected to the first plate segment (621), wherein the first plate segment (621) is located on a side of the second plate segment (622) close to the first clamping arm (61); When the first plate section (621) extends into the limiting groove (51) and cooperates with the limiting groove (51), the second plate section (622) is located at one side of the avoidance opening (41), and the first clamping arm (61) contacts the outer side wall of the sleeve (40), the limiting member (60) is in the limiting position; When the second plate section (622) is located in the avoidance opening (41) and is in avoidance cooperation with the limiting groove (51), the first plate section (621) is located on one side of the avoidance opening (41), and the first clamping arm (61) is in contact with the outer side wall of the sleeve (40), the limiting member (60) is in the avoidance position.

6. The intervertebral support tool according to claim 3, characterized in that: The connecting piece (63) is connected between the first end of the first clamp arm (61) and the first end of the second clamp arm, and a deformation opening (64) is formed between the second end of the first clamp arm (61) and the second end of the second clamp arm; and / or, The limiting groove (51) is an annular groove arranged around the outside of the adjusting rod (50).

7. The intervertebral support tool according to claim 1, characterized in that: The intervertebral support tool further comprises an abutment member (42) arranged on the first end of the sleeve (40), the abutment member (42) abutting between the second end of the upper support plate (10) and the second end of the lower support plate (20), and the pushing member (30) approaches the abutment member (42) to move the upper support plate (10) and the lower support plate (20) away from each other.

8. The intervertebral support tool according to claim 7, characterized in that: The pushing member (30) is provided with a first slide groove (31), and the upper support plate (10) is provided with a first slider (11) located in the first slide groove (31); when the upper support plate (10) and the lower support plate (20) move away from or approach each other, the first slider (11) slides and cooperates with the first slide groove (31); the opening of the first slide groove (31) is arranged toward the upper support plate (10), and the pushing member (30) is further provided with a first anti-slip protrusion (32) located on the groove side wall of the first slide groove (31); the first slider (11) is provided with a first anti-slip groove (111), and the first anti-slip protrusion (32) is movably arranged in the first anti-slip groove (111) and anti-slip cooperates with the first anti-slip groove (111); and / or, The abutment member (42) is provided with a second slide groove (43), and the upper support plate (10) is provided with a second slider (12) located in the second slide groove (43); when the upper support plate (10) and the lower support plate (20) move away from or approach each other, the second slider (12) slides and cooperates with the second slide groove (43); the opening of the second slide groove (43) is arranged toward the upper support plate (10), and the abutment member (42) is further provided with a second anti-slip protrusion (431) located on the groove side wall of the second slide groove (43); the second slider (12) is provided with a second anti-slip groove (121), and the second anti-slip protrusion (431) is movably arranged in the second anti-slip groove (121) and anti-slip cooperates with the second anti-slip groove (121).

9. The intervertebral support tool according to claim 1, characterized in that: The upper surface of the upper support plate (10) is an arc-shaped surface, the arc-shaped surface has a highest point and a center point, the highest point is located between the center point and the first end of the upper support plate (10); and / or, The second end of the sleeve (40) is provided with a first gripping protrusion (44), the second end of the adjusting rod (50) extends out of the sleeve (40), and the second end of the adjusting rod (50) is provided with a second gripping protrusion (52).

10. The intervertebral support tool according to claim 1, characterized in that: The pushing member (30) is provided with a threaded hole, and the first end of the adjusting rod (50) is provided with a threaded section capable of cooperating with the threaded hole, and the adjusting rod (50) rotates one circle so that the upper support plate (10) and the lower support plate (20) move away from each other or approach each other by a preset distance; The sleeve (40) is provided with a counter, which can record the number of rotations of the adjustment rod (50) to calculate the distance value of the upper support plate (10) and the lower support plate (20) moving away from or approaching each other.

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