Intervertebral implant

Abstract

The intervertebral implant comprises a main body, a first supporting piece, a second supporting piece, a first pushing piece and a second pushing piece, the first supporting piece and the second supporting piece are arranged on the upper side and the lower side of the main body respectively, and the first pushing piece and the second pushing piece are arranged in the main body in the front-back direction of the main body; the first pushing piece and the second pushing piece are both in sliding fit with the first supporting piece and the second supporting piece, the first pushing piece and the second pushing piece can slide in the same direction in the front-back direction of the main body so as to adjust the opening height of the first supporting piece and the second supporting piece, and one of the first pushing piece and the second pushing piece does not move; and the other one slides along the front-back direction of the main body so as to adjust the opening angle of the first supporting piece and the second supporting piece. The height and angle of the intervertebral implant are convenient to adjust, a doctor can conveniently adjust the intervertebral implant in the operation process, and the fusion effect of the intervertebral implant can be improved.

Description

TECHNICAL FIELD

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

[0002] Intervertebral fusion can effectively treat problems such as spinal degeneration and instability of patients, and intervertebral fusion requires the use of an intervertebral implant. The intervertebral implant can fuse the upper and lower vertebral bodies, maintain the intervertebral space height, restore the physiological lordosis, reduce the nerve root pressure, and maintain the stability of the spine. In the related art, the structure of the intervertebral implant is not reasonable, which makes it difficult to implant the intervertebral implant, and it is not convenient to adjust the height and angle of the implanted intervertebral implant, thereby affecting the fusion effect of the intervertebral implant and the upper and lower cones. SUMMARY

[0003] The present application aims to at least partially solve one of the technical problems in the related art.

[0004] To this end, an embodiment of the present application proposes an intervertebral implant, which is convenient to adjust the height and angle, facilitates the doctor to adjust the intervertebral implant during the operation, and is conducive to improving the fusion effect of the intervertebral implant.

[0005] The intervertebral implant of the embodiment of the present application comprises: a main body; a first support and a second support, the first support and the second support are arranged on the upper and lower sides of the main body respectively; a first pusher and a second pusher, the first pusher and the second pusher are arranged in the front-rear direction of the main body, the first pusher and the second pusher are in sliding cooperation with the first support and the second support, and the first pusher and the second pusher can slide in the same direction in the front-rear direction of the main body to adjust the support height of the first support and the second support, one of the first pusher and the second pusher is stationary, and the other one slides in the front-rear direction of the main body to adjust the support angle of the first support and the second support.

[0006] When the doctor needs to adjust the height of the intervertebral implant, the first pushing member and the second pushing member can be slid in the same direction along the front-rear direction of the main body to press the first support member and the second support member in the up-down direction of the main body, so that the height of the first support member and the second support member can be adjusted. When the doctor needs to adjust the angle of the intervertebral implant, one of the first pushing member and the second pushing member can be kept stationary, and the other one can be slid along the front-rear direction of the main body to adjust the angle of the first support member and the second support member. Therefore, the height and angle of the intervertebral implant of the embodiment of the present application are convenient to adjust, which is convenient for the doctor to adjust the intervertebral implant during the operation, and is beneficial to improve the fusion effect of the intervertebral implant.

[0007] Optionally, the first support member is provided with a first sliding groove, and the second support member is provided with a second sliding groove, the first sliding groove extends upwardly and obliquely along the front-to-rear direction, and the second sliding groove extends downwardly and obliquely along the front-to-rear direction, and the first pushing member and the second pushing member are in sliding cooperation with the first sliding groove and the second sliding groove.

[0008] Optionally, the first sliding groove comprises a first front sliding groove and a first rear sliding groove, the first front sliding groove is arranged on the front side of the first rear sliding groove, the second sliding groove comprises a second front sliding groove and a second rear sliding groove, the second front sliding groove is arranged on the front side of the second rear sliding groove, the first pushing member is arranged on the front side of the second pushing member, the first pushing member is in sliding cooperation with the first front sliding groove and the second front sliding groove, and the second pushing member is in sliding cooperation with the first rear sliding groove and the second rear sliding groove.

[0009] Optionally, the first pushing member is arranged on the front side of the second pushing member, the intervertebral implant further comprises a first adjusting rod and a second adjusting rod, the first adjusting rod and the second adjusting rod are arranged along the left-right direction of the main body, the first adjusting rod and the second adjusting rod are arranged through the first pushing member and the second pushing member, the first adjusting rod can drive the first pushing member and the second pushing member to slide in the same direction along the front-rear direction of the main body, and the second adjusting rod can drive the first pushing member to slide along the front-rear direction of the main body.

[0010] Optionally, the first pusher is provided with a first matching hole, the first matching hole is provided with a first threaded surface and a first non-threaded surface, the first threaded surface and the first non-threaded surface are arranged along the circumference of the first matching hole, the second pusher is provided with a second matching hole, the second matching hole is provided with a second threaded surface, the outer wall of the first adjusting rod is provided with a first threaded part and a first non-threaded part, the first threaded part and the first non-threaded part are arranged along the circumference of the first adjusting rod, when the first adjusting rod drives the first pusher and the second pusher to slide in the same direction along the front-rear direction of the main body, the first threaded part is matched with the first threaded surface and the second threaded surface, when the second adjusting rod drives the first pusher to slide along the front-rear direction of the main body alone, the first non-threaded part is matched with the first non-threaded surface.

[0011] Optionally, the first pusher is provided with a third matching hole, the second pusher is provided with a avoiding hole, the outer wall of the second adjusting rod is provided with a second threaded part, the second adjusting rod is arranged to pass through the avoiding hole, and the second threaded part is matched with the third matching hole.

[0012] Optionally, the outer wall of the first adjusting rod is provided with a first ring groove, the first ring groove is arranged close to the front end of the first adjusting rod, and the intervertebral implant further comprises a first stop column, the first stop column is connected with the main body and extends into the first ring groove.

[0013] Optionally, the outer wall of the second adjusting rod is provided with a second ring groove, the second ring groove is arranged close to the front end of the second adjusting rod, and the intervertebral implant further comprises a second stop column, the second stop column is connected with the main body and extends into the second ring groove.

[0014] Optionally, the intervertebral implant further comprises a plug, at least part of the plug is arranged in the main body, the plug is provided with an expansion groove, at least one of the first pusher and the second pusher passes through the expansion groove, and at least one of the first pusher and the second pusher can extrude the expansion groove when moving in the direction from back to front, so that the plug passes out of the first support and the second support.

[0015] Optionally, the expansion groove comprises a first groove and a second groove, the first pusher passes through the first groove, and the second pusher passes through the second groove.

[0016] Optionally, the plug is at least two, and the two plugs are arranged on the left and right sides of the first pusher respectively.

[0017] Optionally, the insert sheet has a first tip and a second tip, the first tip is located on the upper side of the insert sheet, and the second tip is located on the lower side of the insert sheet.

[0018] Optionally, the first support and the second support are each provided with an opening for the insert sheet to pass through.

[0019] Optionally, the main body is provided with a first guide hole and a second guide hole on both sides thereof in the left-right direction, the first guide hole and the second guide hole each extend in the front-rear direction of the main body and are arranged in the front-rear direction of the main body, the first push member is in sliding fit with the first guide hole, and the second push member is in sliding fit with the second guide hole.

[0020] Optionally, the upper end surface of the first support gradually extends downward in the direction from back to front, and the lower end surface of the second support gradually extends upward in the direction from back to front.

[0021] Optionally, the upper end surface of the first support and the lower end surface of the second support are provided with a porous structure, and the first support and the second support are each a 3D printed part. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic view of the intervertebral implant of the embodiment of the present application when expanded Figure 1 .

[0023] Figure 2 is a schematic view of the intervertebral implant of the embodiment of the present application when expanded Figure 2 .

[0024] Figure 3 is a schematic view of the intervertebral implant of the embodiment of the present application when not expanded.

[0025] Figure 4 is a schematic view of the intervertebral implant of the embodiment of the present application after the first support is removed.

[0026] Figure 5 is a schematic view of the first support of the intervertebral implant of the embodiment of the present application.

[0027] Figure 6 is a schematic view of the second support of the intervertebral implant of the embodiment of the present application.

[0028] Figure 7 is a schematic view of the first push member of the intervertebral implant of the embodiment of the present application.

[0029] Figure 8 is a schematic view of the second push member of the intervertebral implant of the embodiment of the present application.

[0030] Figure 9 is a schematic view of a first pusher of an intervertebral implant according to an embodiment of the present application.

[0031] Figure 10 is a schematic view of a second pusher of an intervertebral implant according to an embodiment of the present application.

[0032] Figure 11 is a schematic view of an inserter of an intervertebral implant according to an embodiment of the present application.

[0033] Figure 12 is a schematic view of a first stopper (second stopper) of an intervertebral implant according to an embodiment of the present application.

[0034] Reference Signs:

[0035] 1, main body; 11, first guide hole; 12, second guide hole; 13, first stopper; 14, second stopper; 15, clamping groove; 16, first through hole; 17, second through hole;

[0036] 2, first support; 21, first sliding groove; 211, first front sliding groove; 212, first rear sliding groove; 22, aperture; 23, bone graft window;

[0037] 3, second support; 31, second sliding groove; 311, second front sliding groove; 312, second rear sliding groove;

[0038] 4, first pusher; 41, first mating hole; 411, first threaded surface; 412, first non-threaded surface; 42, third mating hole; 421, third threaded surface;

[0039] 5, second pusher; 51, second mating hole; 511, second threaded surface; 512, second non-threaded surface; 52, avoiding hole;

[0040] 6, first adjustment rod; 61, first threaded portion; 62, first non-threaded portion; 63, first ring groove; 64, first tool hole;

[0041] 7, second adjustment rod; 71, second threaded portion; 72, second non-threaded portion; 73, second ring groove; 74, second tool hole;

[0042] 8, inserter; 81, expansion groove; 811, first groove; 812, second groove; 82, first tip; 83, second tip. DETAILED DESCRIPTION

[0043] Embodiments of the present application are described in detail below with reference to the attached drawings. The embodiments described below are examples of embodiments of the present application, and are intended to explain the present application, and should not be understood as limiting the present application.

[0044] The above description is merely illustrative of the embodiments of the present application.Figures 1 to 12 This invention describes an intervertebral implant according to an embodiment of the present invention.

[0045] like Figures 1 to 8 As shown, the intervertebral disc implant of this embodiment includes: a main body 1, a first support member 2, a second support member 3, a first pusher member 4, and a second pusher member 5. The first support member 2 and the second support member 3 are respectively arranged on the upper and lower sides of the main body 1. The first pusher member 4 and the second pusher member 5 are disposed inside the main body 1 and arranged along the front-rear direction of the main body 1. The first pusher member 4 and the second pusher member 5 are both slidably engaged with the first support member 2 and the second support member 3. The first pusher member 4 and the second pusher member 5 can slide in the same direction along the front-rear direction of the main body 1 to adjust the opening height of the first support member 2 and the second support member 3. One of the first pusher member 4 and the second pusher member 5 is stationary, while the other slides along the front-rear direction of the main body 1 to adjust the opening angle of the first support member 2 and the second support member 3.

[0046] According to an embodiment of the intervertebral disc implant of the present invention, when the doctor needs to adjust the height of the intervertebral disc implant, the first pushing member 4 and the second pushing member 5 can be slid in the same direction along the front-back direction of the main body 1, so that the first pushing member 4 and the second pushing member 5 compress the first support member 2 and the second support member 3 in the vertical direction of the main body 1, thereby adjusting the opening height of the first support member 2 and the second support member 3. When the doctor needs to adjust the angle of the intervertebral disc implant, one of the first pushing member 4 and the second pushing member 5 can be kept stationary while the other slides along the front-back direction of the main body 1 to adjust the opening angle of the first support member 2 and the second support member 3. Therefore, the height and angle adjustment of the intervertebral disc implant of the embodiment of the present invention are convenient, facilitating the doctor's adjustment of the intervertebral disc implant during surgery and improving the fusion effect of the intervertebral disc implant.

[0047] It should be noted that when the doctor lowers or raises the height of the intervertebral disc implant, the first pushing member 4 and the second pushing member 5 move in the same direction (simultaneously moving backward or forward). Since both the first pushing member 4 and the second pushing member 5 are in sliding engagement with the first support member 2 and the second support member 3, they can simultaneously raise or lower the anterior and posterior ends of the first support member 2 and the second support member 3, thereby adjusting the height of the intervertebral disc implant. For example, when the first pushing member 4 and the second pushing member 5 move forward synchronously, both the anterior and posterior ends of the first support member 2 and the second support member 3 can be raised simultaneously. When the first pushing member 4 and the second pushing member 5 move backward synchronously, both the anterior and posterior ends of the first support member 2 and the second support member 3 can be lowered simultaneously.

[0048] When the doctor adjusts the opening angle of the first support 2 and the second support 3, since one of the first pusher 4 and the second pusher 5 is fixed, the other one slides along the front-rear direction of the main body 1, thus the height of the intervertebral implant on one side (front side or rear side) only changes, thereby the opening angle of the first support 2 and the second support 3 can be adjusted.

[0049] Optionally, as shown in Figure 5 and Figure 6 , the first support 2 is provided with a first sliding groove 21, and the second support 3 is provided with a second sliding groove 31, the first sliding groove 21 extends upwardly along the front-rear direction, the second sliding groove 31 extends downwardly along the front-rear direction, and the first pusher 4 and the second pusher 5 are in sliding cooperation with the first sliding groove 21 and the second sliding groove 31. It can be understood that the first pusher 4 is in sliding cooperation with the first sliding groove 21 and the second sliding groove 31, and the second pusher 5 is in sliding cooperation with the first sliding groove 21 and the second sliding groove 31.

[0050] Since the first sliding groove 21 extends upwardly along the front-rear direction, when the first pusher 4 and the second pusher 5 slide horizontally along the front-rear direction, the first pusher 4 and the second pusher 5 can give the first support 2 upward or downward component force under the guide action of the inclined surface of the first sliding groove 21, so as to adjust the height of the first support 2 along the up-down direction.

[0051] Since the second sliding groove 31 extends downwardly along the front-rear direction, when the first pusher 4 and the second pusher 5 slide horizontally along the front-rear direction, the first pusher 4 and the second pusher 5 can give the second support 3 upward or downward component force under the guide action of the inclined surface of the second sliding groove 31, so as to adjust the height of the second support 3 along the up-down direction.

[0052] As shown in Figure 5 and Figure 6 , the first sliding groove 21 comprises a first front sliding groove 211 and a first rear sliding groove 212, the first front sliding groove 211 is arranged at the front side of the first rear sliding groove 212, the second sliding groove 31 comprises a second front sliding groove 311 and a second rear sliding groove 312, the second front sliding groove 311 is arranged at the front side of the second rear sliding groove 312, the first pusher 4 is arranged at the front side of the second pusher 5, the first pusher 4 is in sliding cooperation with the first front sliding groove 211 and the second front sliding groove 311, and the second pusher 5 is in sliding cooperation with the first rear sliding groove 212 and the second rear sliding groove 312.

[0053] When the first pusher 4 slides horizontally along the front-rear direction, the first pusher 4 can give the front side of the first support 2 and the front side of the second support 3 upward or downward component force under the guide action of the inclined surface of the first front sliding groove 211 and the second front sliding groove 311, so as to adjust the height of the front side of the intervertebral implant.

[0054] When the second pusher 5 slides horizontally along the front-rear direction, the second pusher 5 can give the rear side of the first support 2 and the rear side of the second support 3 an upward or downward component force under the inclined surface guiding effect of the first rear sliding groove 212 and the second rear sliding groove 312, so as to adjust the height of the rear side of the intervertebral implant.

[0055] The intervertebral implant of the embodiment of the present application can decouple the height adjustment movement and the angle adjustment movement of the intervertebral implant by cooperating the first pusher 4 and the second pusher 5 with the first support 2 and the second support 3 in the above manner, which is beneficial to improve the convenience of height and angle adjustment of the intervertebral implant and save the operation time.

[0056] Optionally, as shown in Figure 4 the front side of the second pusher 5, the intervertebral implant further comprises a first adjustment rod 6 and a second adjustment rod 7, the first adjustment rod 6 and the second adjustment rod 7 are arranged along the left-right direction of the main body 1, the first adjustment rod 6 and the second adjustment rod 7 are both rotationally arranged through the first pusher 4 and the second pusher 5, the first adjustment rod 6 can drive the first pusher 4 and the second pusher 5 to slide in the same direction along the front-rear direction of the main body 1, and the second adjustment rod 7 can drive the first pusher 4 to slide along the front-rear direction of the main body 1.

[0057] It can be understood that when the first adjustment rod 6 rotates, the first pusher 4 and the second pusher 5 can be driven to slide in the same direction along the front-rear direction of the main body 1, so as to adjust the overall distraction height of the first support 2 and the second support 3. When the second adjustment rod 7 rotates, the first pusher 4 can be driven to slide along the front-rear direction of the main body 1, so as to adjust the distraction height of the front side of the first support 2 and the second support 3. Since the position of the second pusher 5 does not change at this time, that is, the distraction height of the rear side of the first support 2 and the second support 3 does not change, so as to change the distraction angle of the first support 2 and the second support 3.

[0058] Optionally, as shown in Figures 7 to 10 the first pusher 4 is provided with a first matching hole 41, the first matching hole 41 is provided with a first threaded surface 411 and a first non-threaded surface 412, the first threaded surface 411 and the first non-threaded surface 412 are arranged along the circumference of the first matching hole 41, the second pusher 5 is provided with a second matching hole 51, the second matching hole 51 is provided with a second threaded surface 511, the outer wall of the first adjustment rod 6 is provided with a first threaded portion 61 and a first non-threaded portion 62, and the first threaded portion 61 and the first non-threaded portion 62 are arranged along the circumference of the first adjustment rod 6.

[0059] As shown in Figures 7 to 10As shown, when the first adjusting rod 6 drives the first pusher 4 and the second pusher 5 to slide in the same direction along the front-rear direction of the main body 1, the first threaded part 61 cooperates with the first threaded surface 411 and the second threaded surface 511, and when the second adjusting rod 7 drives the first pusher 4 to slide along the front-rear direction of the main body 1 alone, the first non-threaded part 62 cooperates with the first non-threaded surface 412.

[0060] It can be understood that when the first adjusting rod 6 drives the first pusher 4 and the second pusher 5 to slide in the same direction along the front-rear direction of the main body 1, the first pusher 4 and the second pusher 5 can slide in the same direction along the front-rear direction of the main body 1 under the cooperation of the first threaded part 61 and the first threaded surface 411 and the second threaded surface 511. When the second adjusting rod 7 drives the first pusher 4 to slide along the front-rear direction of the main body 1 alone, the first non-threaded part 62 cooperates with the first non-threaded surface 412, so that the first pusher 4 can move forward and backward without being interfered by the first adjusting rod 6, so as to ensure that the second adjusting rod 7 can normally drive the first pusher 4 to move forward and backward, and the first adjusting rod 6 can remain stationary. Therefore, the intervertebral implant of the embodiment of the present application can adjust the height and the angle of the intervertebral implant by the first adjusting rod 6 and the second adjusting rod 7 respectively, and do not interfere with each other, which is beneficial to improve the convenience of the doctor when adjusting.

[0061] As shown in the figure, Figures 7 to 10 The first pusher 4 is provided with a third cooperation hole 42, the second pusher 5 is provided with an avoiding hole 52, the outer wall of the second adjusting rod 7 is provided with a second threaded part 71, the second adjusting rod 7 is rotatably arranged in the avoiding hole 52, and the second threaded part 71 cooperates with the third cooperation hole 42. Since the second adjusting rod 7 is rotatably arranged in the avoiding hole 52, when the second adjusting rod 7 rotates, the second pusher 5 will not move with the second pusher 5, that is, the avoiding hole 52 can be used to avoid the second adjusting rod 7 to prevent the second pusher 5 from moving synchronously when the second adjusting rod 7 rotates. Since the outer wall of the second adjusting rod 7 is provided with the second threaded part 71, the second threaded part 71 cooperates with the third cooperation hole 42, so that the first pusher 4 can be driven to move forward and backward when the second adjusting rod 7 rotates.

[0062] Specifically, as shown in the figure, Figures 7 to 10As shown, the third mating hole 42 comprises a third threaded surface 421 and a third non-threaded surface (not shown), the third threaded surface 421 and the third non-threaded surface are arranged along the circumference of the third mating hole 42, the outer wall of the second adjusting rod 7 is further provided with a second non-threaded portion 72, the second threaded portion 71 and the second non-threaded portion 72 are arranged along the circumference of the second adjusting rod 7. When the first adjusting rod 6 drives the first pusher 4 and the second pusher 5 to slide in the front-rear direction of the main body 1 in the same direction, the second non-threaded portion 72 cooperates with the third non-threaded surface, so that the second adjusting rod 7 does not hinder the front-rear movement of the first pusher 4, and the first threaded portion 61 cooperates with the first threaded surface 411 and the second threaded surface 511 to synchronously drive the first pusher 4 and the second pusher 5 to move forward and backward.

[0063] When the second adjusting rod 7 drives the first pusher 4 to slide in the front-rear direction of the main body 1 alone, the second threaded portion 71 cooperates with the third threaded surface 421, and the first non-threaded portion 62 cooperates with the first non-threaded surface 412, so that the first pusher 4 can be driven to move forward and backward when the second adjusting rod 7 rotates.

[0064] Optionally, as shown in Figure 4 and Figure 9 , the outer wall of the first adjusting rod 6 is provided with a first annular groove 63, the first annular groove 63 is arranged close to the front end of the first adjusting rod 6, and the intervertebral implant further comprises a first stop column 13, the first stop column 13 is connected with the main body 1 and extends into the first annular groove 63. It can be understood that after the first stop column 13 extends into the first annular groove 63, the first adjusting rod 6 can be axially limited to prevent the problem of moving in the front-rear direction relative to the main body 1 when the first adjusting rod 6 rotates.

[0065] Exemplarily, the first stop column 13 can be a threaded plug or a pin shaft.

[0066] Optionally, as shown in Figure 4 and Figure 10 , the outer wall of the second adjusting rod 7 is provided with a second annular groove 73, the second annular groove 73 is arranged close to the front end of the second adjusting rod 7, and the intervertebral implant further comprises a second stop column 14, the second stop column 14 is connected with the main body 1 and extends into the second annular groove 73. It can be understood that after the second stop column 14 extends into the second annular groove 73, the second adjusting rod 7 can be axially limited to prevent the problem of moving in the front-rear direction relative to the main body 1 when the second adjusting rod 7 rotates.

[0067] Exemplarily, the second stop column 14 can be a threaded plug or a pin shaft.

[0068] As shown in Figure 9 and Figure 10As shown, the rear end of the first adjusting rod 6 is provided with a first tool hole 64, and the rear end of the second adjusting rod 7 is provided with a second tool hole 74. The first tool hole 64 and the second tool hole 74 can be a triangular hole, a star-shaped hole or a hexagonal hole, so that the doctor can rotate the first adjusting rod 6 and the second adjusting rod 7 by using a wrench.

[0069] Optionally, as shown in Figure 1 , Figure 4 and Figure 11 , the intervertebral implant further comprises a plug 8, at least part of the plug 8 is arranged in the main body 1, the plug 8 is provided with an expansion groove 81, and at least one of the first pushing member 4 and the second pushing member 5 is arranged in the expansion groove 81. When at least one of the first pushing member 4 and the second pushing member 5 moves in the rear-to-front direction, it can extrude the expansion groove 81, so that the plug 8 penetrates out of the first support 2 and the second support 3. It can be understood that when the intervertebral implant is not distracted, the plug 8 is located in the main body 1, so as to prevent the problem that the plug 8 interferes with the upper and lower vertebral bodies when the intervertebral implant is implanted. When the intervertebral implant is implanted into the human body, and the doctor gradually distracts the intervertebral implant, at least one of the first pushing member 4 and the second pushing member 5 can move in the rear-to-front direction to extrude the expansion groove 81, so that the plug 8 penetrates out of the first support 2 and the second support 3, so that the plug 8 can be inserted into the vertebral endplate of the upper and lower vertebral bodies, so as to improve the stability of the intervertebral implant after implantation.

[0070] Exemplarily, as shown in Figure 11 , the expansion groove 81 comprises a first groove 811 and a second groove 812, the first pushing member 4 is arranged in the first groove 811, and the second pushing member 5 is arranged in the second groove 812. It can be understood that when the first pushing member 4 and the second pushing member 5 move in the rear-to-front direction, they can both drive the expansion groove 81 to open in the up-and-down direction, so as to improve the reliability of the plug 8 inserted into the vertebral endplate of the upper and lower vertebral bodies, and facilitate preventing the problem of plug 8 loosening.

[0071] As shown in Figure 4 , the plug 8 is at least two, and the two plugs 8 are arranged on the left and right sides of the first pushing member 4 respectively, so as to improve the support effect of the intervertebral implant.

[0072] As shown in Figure 11 , the plug 8 has a first sharp end 82 and a second sharp end 83, the first sharp end 82 is located on the upper side of the plug 8, and the second sharp end 83 is located on the lower side of the plug 8. When the plug 8 is gradually distracted, the first sharp end 82 and the second sharp end 83 are more easily embedded into the vertebral endplate of the upper and lower vertebral bodies, so as to improve the support effect of the intervertebral implant.

[0073] As shown in Figure 3As shown, the first support 2 and the second support 3 are both provided with an aperture 22 through which the insertion piece 8 passes, so that the structural strength of the first support 2 and the second support 3 can be ensured, and the movement of the insertion piece 8 will not be interfered, and the structure is compact and convenient to assemble.

[0074] Optionally, as shown in Figure 1 and Figure 2 , the main body 1 is provided with a first guide hole 11 and a second guide hole 12 on both sides thereof along the left-right direction, the first guide hole 11 and the second guide hole 12 both extend along the front-rear direction of the main body 1 and are arranged in the front-rear direction of the main body 1, the first pusher 4 is in sliding fit with the first guide hole 11, and the second pusher 5 is in sliding fit with the second guide hole 12. Thus, the front-rear movement of the first pusher 4 and the second pusher 5 can be guided, so as to improve the accuracy of the position movement of the first pusher 4 and the second pusher 5.

[0075] As shown in Figure 2 , the upper end surface of the first support 2 gradually extends downward along the direction from the rear to the front, and the lower end surface of the second support 3 gradually extends upward along the direction from the rear to the front. Thus, the shape of the intervertebral implant can be more consistent with the structure of the human vertebrae, which is beneficial to improve the fusion effect of the intervertebral implant with the upper and lower vertebral bodies.

[0076] Optionally, the upper end surface of the first support 2 and the lower end surface of the second support 3 are provided with a porous structure, and the first support 2 and the second support 3 are both 3D printed parts. Thus, the first support 2 and the second support 3 of different shapes can be printed according to different patients, and the porous structure of the upper end surface of the first support 2 and the lower end surface of the second support 3 can promote the fusion effect of the vertebral implant with the upper and lower vertebral bodies, so that the intervertebral implant after implantation is more stable.

[0077] As shown in Figure 3 , the rear end of the main body 1 is provided with a first through hole 16 and a second through hole 17, the first through hole 16 and the second through hole 17 are arranged in the left-right direction of the main body 1, the first through hole 16 is used for penetrating the first adjusting rod 6, and the second through hole 17 is used for penetrating the second adjusting rod 7.

[0078] Exemplarily, as shown in Figures 1 to 3 , the left and right sides of the rear end of the main body 1 are both provided with a clamping groove 15, so that the doctor can clamp the intervertebral implant by a tool. As shown in Figure 5 and Figure 6 , the first support 2 and the second support 3 are both provided with a bone graft window 23, so as to fill the bone cement into the main body 1, and improve the stability of the intervertebral implant after implantation.

[0079] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0080] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated thereby. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0081] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0082] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0083] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terms "comprising", "containing", "having" or "including" and their derivatives, mean "including but not limited to". The terms "coupled" and "connected", along with their derivatives, mean "directly or indirectly connected".

[0084] Although the above-mentioned embodiments have been shown and described, it is to be understood that the above-mentioned embodiments are exemplary, and are not to be construed as limiting the present disclosure, and the changes, modifications, replacements and variations made by those skilled in the art to the above-mentioned embodiments are within the protection scope of the present disclosure.

Claims

1. An intervertebral disc implant, characterized in that, include: Main body (1); The first support member (2) and the second support member (3) are respectively arranged on the upper and lower sides of the main body (1); The first pusher (4) and the second pusher (5) are disposed inside the main body (1) and arranged along the front-back direction of the main body (1). The first pusher (4) and the second pusher (5) are slidably engaged with the first support member (2) and the second support member (3). The first pusher (4) and the second pusher (5) can slide in the same direction along the front-back direction of the main body (1) to adjust the opening height of the first support member (2) and the second support member (3). One of the first pusher (4) and the second pusher (5) is stationary, while the other slides along the front-back direction of the main body (1) to adjust the opening angle of the first support member (2) and the second support member (3).

2. The intervertebral disc implant according to claim 1, characterized in that, The first support member (2) is provided with a first sliding groove (21), and the second support member (3) is provided with a second sliding groove (31). The first sliding groove (21) extends upward at an angle from front to back, and the second sliding groove (31) extends downward at an angle from front to back. The first push member (4) and the second push member (5) are both in sliding cooperation with the first sliding groove (21) and the second sliding groove (31).

3. The intervertebral implant according to claim 2, characterized in that, The first slide groove (21) includes a first front slide groove (211) and a first rear slide groove (212). The first front slide groove (211) is located on the front side of the first rear slide groove (212). The second slide groove (31) includes a second front slide groove (311) and a second rear slide groove (312). The second front slide groove (311) is located on the front side of the second rear slide groove (312). The first pusher (4) is located on the front side of the second pusher (5). The first pusher (4) is slidably engaged with the first front slide groove (211) and the second front slide groove (311). The second pusher (5) is slidably engaged with the first rear slide groove (212) and the second rear slide groove (312).

4. The intervertebral implant according to claim 2, characterized in that, The first pusher (4) is located on the front side of the second pusher (5). The intervertebral implant also includes a first adjusting rod (6) and a second adjusting rod (7). The first adjusting rod (6) and the second adjusting rod (7) are arranged along the left and right direction of the main body (1). The first adjusting rod (6) and the second adjusting rod (7) are rotatably inserted through the first pusher (4) and the second pusher (5). The first adjusting rod (6) can drive the first pusher (4) and the second pusher (5) to slide in the same direction along the front and back direction of the main body (1). The second adjusting rod (7) can drive the first pusher (4) to slide along the front and back direction of the main body (1) independently.

5. The intervertebral implant according to claim 4, characterized in that, The first pusher (4) is provided with a first mating hole (41), and the first mating hole (41) is provided with a first threaded surface (411) and a first non-threaded surface (412). The first threaded surface (411) and the first non-threaded surface (412) are arranged circumferentially along the first mating hole (41). The second pusher (5) is provided with a second mating hole (51), and the second mating hole (51) is provided with a second threaded surface (511). The outer wall of the first adjusting rod (6) is provided with a first threaded portion (61) and a first non-threaded portion (62). 61) and the first non-threaded portion (62) are arranged circumferentially along the first adjusting rod (6). When the first adjusting rod (6) drives the first pushing member (4) and the second pushing member (5) to slide in the same direction along the front and back direction of the main body (1), the first threaded portion (61) cooperates with the first threaded surface (411) and the second threaded surface (511). When the second adjusting rod (7) drives the first pushing member (4) to slide along the front and back direction of the main body (1) alone, the first non-threaded portion (62) cooperates with the first non-threaded surface (412).

6. The intervertebral implant according to claim 5, characterized in that, The first pusher (4) is provided with a third mating hole (42), the second pusher (5) is provided with a clearance hole (52), the outer wall of the second adjusting rod (7) is provided with a second threaded part (71), the second adjusting rod (7) is rotatably inserted through the clearance hole (52), and the second threaded part (71) is mated with the third mating hole (42).

7. The intervertebral implant according to claim 4, characterized in that, The outer wall of the first adjusting rod (6) is provided with a first annular groove (63), the first annular groove (63) is arranged near the front end of the first adjusting rod (6), and the intervertebral implant also includes a first stop post (13), the first stop post (13) is connected to the main body (1) and extends into the first annular groove (63); And / or, the outer wall of the second adjusting rod (7) is provided with a second annular groove (73), the second annular groove (73) is arranged near the front end of the second adjusting rod (7), and the intervertebral implant also includes a second stop post (14), the second stop post (14) is connected to the main body (1) and extends into the second annular groove (73).

8. The intervertebral disc implant according to claim 1, characterized in that, The intervertebral implant also includes a insert (8), at least a portion of which is disposed within the main body (1). The insert (8) has an expansion groove (81) therein. At least one of the first pusher (4) and the second pusher (5) passes through the expansion groove (81). When at least one of the first pusher (4) and the second pusher (5) moves in a direction from back to front, it can squeeze the expansion groove (81) so that the insert (8) passes through the first support (2) and the second support (3).

9. The intervertebral disc implant according to claim 8, characterized in that, The expansion groove (81) includes a first groove (811) and a second groove (812), the first pusher (4) passes through the first groove (811), and the second pusher (5) passes through the second groove (812); And / or, there are at least two inserts (8), and the two inserts (8) are respectively arranged on the left and right sides of the first pusher (4); And / or, the insert (8) has a first tip (82) and a second tip (83), the first tip (82) being located on the upper side of the insert (8) and the second tip (83) being located on the lower side of the insert (8); And / or, both the first support member (2) and the second support member (3) are provided with notches (22) for the insert (8) to pass through.

10. The intervertebral implant according to any one of claims 1-9, characterized in that, The main body (1) is provided with a first guide hole (11) and a second guide hole (12) on both sides along its left and right directions. The first guide hole (11) and the second guide hole (12) extend along the front and back directions of the main body (1) and are arranged at intervals along the front and back directions of the main body (1). The first pusher (4) is slidably engaged with the first guide hole (11), and the second pusher (5) is slidably engaged with the second guide hole (12). And / or, the upper end face of the first support member (2) extends downward gradually in a direction from back to front, and the lower end face of the second support member (3) extends upward gradually in a direction from back to front. And / or, the upper end face of the first support member (2) and the lower end face of the second support member (3) are provided with a porous structure, and both the first support member (2) and the second support member (3) are 3D printed parts.

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