CN116077243B

CN116077243B - Intervertebral implant for distracting the cervical spine, implant system and use

Info

Publication number: CN116077243B
Application number: CN202211637094.4A
Authority: CN
Inventors: 徐鹏; 代亚男; 张勋; 甄超; 段红平
Original assignee: Tianjin Zhengtian Medical Instrument Co Ltd; Beijing Naton Medical Technology Holdings Co Ltd
Current assignee: Tianjin Zhengtian Medical Instrument Co Ltd; Beijing Naton Medical Technology Holdings Co Ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2024-04-12
Anticipated expiration: 2042-12-16
Also published as: CN116077243A

Abstract

Embodiments of the present invention provide an intervertebral implant and implant system for distracting the cervical spine and applications. Wherein, the intervertebral implant includes a driver, a first support body, and a second support body. The intervertebral implant has an open state and a closed state, the first support body and the second support body are detachably arranged along the height direction of the intervertebral implant so as to form a bone containing cavity for containing bone grafting materials, the first support body is provided with a first chute which is obliquely arranged relative to the height direction of the intervertebral implant, the driving piece comprises a pushing piece and a first sliding column which are connected, the first sliding column is in sliding fit in the first chute, and the pushing piece is movable along the length direction of the intervertebral implant so as to realize the transition of the intervertebral implant between the open state and the closed state. Therefore, the intervertebral implant for stretching the cervical vertebra has the advantages of simple structure, good bone grafting effect and high bone fusion rate.

Description

Intervertebral implant for distracting the cervical spine, implant system and use

Technical Field

The invention relates to the technical field of medical appliances, in particular to an intervertebral implant for expanding cervical vertebrae, an implantation system with the intervertebral implant and application of the intervertebral implant.

Background

The cervical interbody fusion can effectively treat cervical degeneration, instability and other problems, can fuse upper and lower vertebral bodies, has the effects of maintaining the height of an intervertebral space, recovering physiological lordosis, relieving nerve root pressure and maintaining spinal stability, has satisfactory clinical effect, small operation wound and convenient operation. In the related art, the intervertebral implant includes a first support body, a second support body, and an intermediate body having a wedge surface disposed therebetween, and the first support body and the second support body are pushed to approach or separate from each other by the wedge surface of the intermediate body to achieve the adjustment of the height of the intervertebral implant. However, the structure of the intermediate body occupies the space of the bone cavity, so that the problem of small bone cavity is caused, and the problem of poor stability and fusion of the intervertebral implant is caused.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, embodiments of the present invention provide an intervertebral implant for distracting the cervical spine. The intervertebral implant has the advantages of simple structure, good bone grafting effect and high bone fusion rate. In addition, the intervertebral implant can be fully expanded, so that the effect of restoring the physiological curvature of the spine is improved.

The embodiment of the invention also provides an intervertebral implantation system.

The embodiment of the invention also provides application of the intervertebral implant.

An intervertebral implant for distracting a cervical vertebra in accordance with an embodiment of the present invention includes a driving member, a first support body, and a second support body. The intervertebral implant has an open state and a closed state, the first support body and the second support body are detachably arranged along the height direction of the intervertebral implant so as to form a bone containing cavity for containing bone grafting materials, the first support body is provided with a first chute which is obliquely arranged relative to the height direction of the intervertebral implant, the first chute is provided with a notch which is opened towards the second support body, the driving piece is arranged between the first support body and the second support body along the height direction of the intervertebral implant, the driving piece comprises a pushing piece and a first sliding column which are connected with each other, the first sliding column is in sliding fit in the first chute, the pushing piece is movable along the direction perpendicular to the height direction of the intervertebral implant and perpendicular to the extending direction of the first sliding column, and the driving piece drives the first sliding column to move along the oblique direction of the first chute so as to realize the open state of the intervertebral implant between the closed state and the closed state.

According to the intervertebral implant for stretching cervical vertebra, disclosed by the embodiment of the invention, the first chute on the first support body and the first sliding column of the driving piece are used for driving the pushing piece to move along the direction perpendicular to the height direction of the intervertebral implant and the extending direction of the first sliding column to be converted into the movement of the first sliding column along the height direction of the intervertebral implant, so that the intervertebral implant is changed between the folded state and the stretched state, and the intervertebral implant has the advantage of simple structure. In addition, along with the cooperation of the first sliding column and the first chute, the pushing piece can also move in the height direction of the intervertebral implant, so that when the upper and lower heights of the first supporting body and the second supporting body are lifted, the volume occupied by the pushing piece between the first supporting body and the second supporting body can not change along with the movement of the pushing piece, and accordingly the space of the bone containing cavity is correspondingly lifted in the process that the intervertebral implant is converted from the closed state to the open state, and therefore implantable bone filling materials are lifted, and the bone fusion effect of the open intervertebral implant is improved. Thus, the stability and the fusion performance of the intervertebral implant are improved.

Therefore, the intervertebral implant for stretching the cervical vertebra has the advantages of simple structure, good bone grafting effect and high bone fusion rate.

In some embodiments, the first support body includes a first support body, a first support portion and a second support portion, the first support portion and the second support portion are symmetrically disposed on both sides of the first support body along a width direction of the intervertebral implant, the first support portion and the second support portion each extend from the first support body toward a direction approaching the second support body along a height direction of the intervertebral implant, each of the first support portion and the second support portion has the first chute, the first slide column is slidably fitted in the first chute along a depth direction of the first chute, and the pushing member is movably disposed between the first support body and the second support body along the length direction of the intervertebral implant.

In some embodiments, each of the first and second supports has a second chute, the driver includes at least two second slide posts correspondingly disposed within the second chute, the first and second chute being disposed sequentially along a length of the intervertebral implant.

In some embodiments, the first support body has a front end and a rear end along the length of the intervertebral implant, the first angled slot is disposed proximate the front end, the second angled slot is disposed proximate the rear end, and the first angled slot inclination angle is less than the second angled slot inclination angle such that the pusher member is movable along the length of the intervertebral implant to vary the height and angle of the first support body and the second support body.

In some embodiments, the second support body has a third chute opened toward one side of the first support body, the third chute being disposed to intersect the first chute, and the first slide post being correspondingly and movably disposed in the third chute in a depth direction of the third chute so that the first support body and the second support body are moved toward or away from each other.

In some embodiments, the second support body includes a second support body, a third support portion and a fourth support portion, the third support portion and the fourth support portion are symmetrically disposed on both sides of the second support body in a width direction of the intervertebral implant, the third support portion and the fourth support portion each extend from the second support body toward a direction close to the first support body, each of the third support portion and the fourth support portion is provided with a third chute, and the first slide post is correspondingly and movably disposed in the third chute in a depth direction of the third chute.

In some embodiments, the third chute and the first chute are symmetrically disposed in a predetermined plane perpendicular to a height direction of the intervertebral implant.

In some embodiments, the second support body includes a second support body, a third support portion and a fourth support portion, the third support portion and the fourth support portion are symmetrically disposed at two ends of the second support body along a width direction of the intervertebral implant, the third support portion and the fourth support portion are each provided with a third chute and a fourth chute, the first slide column is correspondingly and movably disposed in the third chute along a depth direction of the first chute, the second slide column is correspondingly and movably disposed in the fourth chute along a depth direction of the fourth chute, the third chute and the first chute are symmetrically disposed at a preset plane perpendicular to a height direction of the intervertebral implant, and the fourth chute and the second chute are symmetrically disposed along the preset plane, so that the first support body and the second support body are mutually close to or far away from each other.

In some embodiments, the first angled slot is angled 45 ° in the anterior-to-posterior direction along the height of the intervertebral implant, the third angled slot is angled 45 ° in the posterior-to-anterior direction along the height of the intervertebral implant, and the first angled slot angle is less than or equal to the second angled slot angle.

In some embodiments, the first slide post includes a first post body and a first limit protrusion having a first slip surface in contact with a slot wall surface of the first chute.

In some embodiments, the first stop protrusion further comprises a third sliding surface in contact with a groove wall surface of the third chute, the first sliding surface and the second sliding surface are symmetrically arranged on a preset plane perpendicular to the height direction of the intervertebral implant, and each of the first sliding surface and the third sliding surface is tangent to the peripheral wall of the first cylinder.

In some embodiments, the second limiting protrusion further comprises a fourth sliding surface, the fourth sliding surface is in contact with a groove wall surface of the fourth chute, the second sliding surface and the fourth sliding surface are symmetrically arranged on a preset plane perpendicular to the height direction of the intervertebral implant, and each of the second sliding surface and the second sliding surface is tangential to the peripheral wall of the second cylinder.

In some embodiments, the first strut is drop-shaped in cross-section; and/or, the cross section of the second sliding column is in a water drop shape.

In some embodiments, the angle between the first slip plane and the third slip plane is 90A 180.

In some embodiments, the angle between the second slip plane and the fourth slip plane is 90A 180.

In some embodiments, the second spool includes a second post and a second limit projection having a second slip surface in contact with a slot wall surface of the second chute.

In some embodiments, the intervertebral implant for distracting the cervical vertebra further comprises a positioning enclosure which is sleeved outside the first support body and the second support body so as to limit the displacement of the first support body and the second support body in the height direction perpendicular to the intervertebral implant.

In some embodiments, the positioning enclosure comprises an enclosure body and a first guide protrusion, the first guide protrusion is arranged on one side of the enclosure body and extends towards one side close to the first support body, the first support body is provided with a first positioning groove, and the first guide protrusion is movably arranged in the first positioning groove along the height direction of the intervertebral implant.

In some embodiments, the positioning enclosure further comprises a second guiding protrusion disposed on one side of the enclosure body and extending toward a side proximate to the second support body, the second support body having a second positioning slot thereon, the second guiding protrusion being movably disposed within the second positioning slot along a height direction of the intervertebral implant.

In some embodiments, the driving piece further comprises a driving rod, the driving rod comprises a matching part, a connecting part and an end part which are sequentially connected, a step is formed between the connecting part and the end part, a matching hole is formed in the surrounding frame body, a through hole is formed in the pushing piece, the matching part is arranged in the matching hole in a penetrating mode, and the connecting part is arranged in the through hole in a penetrating mode and the driving piece is abutted to the step.

In some embodiments, the peripheral frame body has an anterior side and a posterior side along a length of the intervertebral implant, and the anterior side is provided with a bone grafting hole for filling the bone grafting material into the bone containing cavity.

In some embodiments, the front side of the enclosure frame body is further provided with a holding groove or a holding protrusion so as to clamp the enclosure frame body by an implantation wrench.

In some embodiments, the peripheral frame body is provided with avoidance grooves along two sides of the width direction of the intervertebral implant.

In some embodiments, the pusher is a hollow receptacle.

In some embodiments, a side of the first support body remote from the second support body has a plurality of first teeth.

In some embodiments, a side of the first support body away from the second support body is a convex curved surface.

In some embodiments, a side of the second support body remote from the first support body has a plurality of second teeth.

In some embodiments, the thickness of the second support decreases in a direction along the length of the intervertebral implant from one end of the second support to the other end of the second support.

In some embodiments, at least one of the first support and the second support is a porous structure.

In some embodiments, at least one of the first support and the second support is provided with a bone grafting window.

In some embodiments, the intervertebral implant for distracting a cervical vertebra further comprises a first connecting member, and the first support body is provided with a first connecting hole for the first connecting member to penetrate therethrough so that the first connecting member is connected with the vertebral body;

In some embodiments, the intervertebral implant for distracting a cervical vertebra further comprises a second connecting member, and the second support body is provided with a second connecting hole through which the second connecting member is inserted, so that the second connecting member is connected with the vertebral body.

An intervertebral implant system according to an embodiment of the present invention may include an implant connected to the pushing member and configured to adjust a position of the pushing member so that the first strut is driven to move in an oblique direction of the first chute by the pushing member to transition the intervertebral implant between the closed state and the open state, and an intervertebral implant for expanding a cervical vertebra according to any one of the above embodiments.

The application of the intervertebral implant for stretching cervical vertebra, which is applied to cervical vertebra, thoracic vertebra or lumbar vertebra, is disclosed.

Drawings

Fig. 1 is a perspective view of an intervertebral implant for distracting the cervical spine according to one embodiment of the invention.

Fig. 2 is a perspective view of an intervertebral implant for distracting a cervical vertebra according to an embodiment of the present invention with the first support body omitted.

Fig. 3 is a perspective view of an intervertebral implant for distracting the cervical spine omitting a positioning frame according to an embodiment of the present invention.

Fig. 4 is another perspective view of an intervertebral implant for distracting the cervical spine with the positioning enclosure omitted in an embodiment of the invention.

Fig. 5 is a perspective view of a first support body according to an embodiment of the present invention.

Fig. 6 is a perspective view of a second support body according to an embodiment of the present invention.

Fig. 7 is a perspective view of a first support body according to another embodiment of the present invention.

Fig. 8 is a perspective view of a positioning enclosure according to an embodiment of the invention.

Fig. 9 is an assembly view of a pusher, a first spool and a second spool of an embodiment of the present invention.

Fig. 10 is an assembly view of a pusher member, a first spool, a second spool, and a drive rod according to an embodiment of the present invention.

Fig. 11 is an assembly view of a driving lever according to an embodiment of the present invention.

Fig. 12 is a perspective view of a snap ring according to an embodiment of the invention.

Reference numerals:

an intervertebral implant 100;

a first support 1; a first support body 11; a first support 12; a second support portion 13; a first chute 14; a second chute 15; a first positioning groove 16; a first tooth 17; a first connection hole 18; bone grafting window 19;

a second support body 2; a second support body 21; a third support portion 22; a fourth supporting portion 23; a third inclined groove 24; a fourth chute 25; a second positioning groove 26; a second lobe 27; a second connection hole 28;

A driving member 3; a pusher 31; a housing portion 311; a through hole 312; a first spool 32; a first cylinder 321; a first limit projection 322; a second spool 33; a second column 331; a second limit protrusion 332; a drive lever 34; a fitting portion 341; a connection portion 342; an end 343; a clasp 35;

positioning a surrounding frame 4; a surrounding frame body 41; a fitting hole 411; bone grafting holes 412; a holding groove 413; a relief groove 414; a first guide projection 42; a second guide projection 43;

a first connection member 51; a second connector 52.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

Referring now to fig. 1-12, an intervertebral implant 100 and implant system for distracting a cervical vertebra in accordance with embodiments of the present invention are described.

An intervertebral implant 100 for distracting a cervical vertebra according to an embodiment of the present invention includes a driving member 3, a first support body 1, and a second support body 2. The intervertebral implant 100 has an open state and a closed state, the first support body 1 and the second support body 2 are detachably arranged along the height direction of the intervertebral implant 100 so as to form a bone containing cavity for containing bone grafting materials, the first support body 1 has a first chute 14 which is obliquely arranged relative to the height direction of the intervertebral implant 100, the first chute 14 has a notch which is opened towards the second support body 2, the driving piece 3 is arranged between the first support body 1 and the second support body 2 along the height direction of the intervertebral implant 100, the driving piece 3 comprises a pushing piece 31 and a first sliding column 32 which are connected with each other, the first sliding column 32 is in sliding fit in the first chute 14, the pushing piece 31 is movable along the direction perpendicular to the height direction of the intervertebral implant 100 and perpendicular to the extending direction of the first sliding column 32, and the first sliding column 32 is driven by the pushing piece 31 to move along the oblique direction of the first chute 14 so as to realize the transition of the intervertebral implant 100 between the open state and the closed state.

In other words, the pusher member 31 is movable in a direction perpendicular to the height direction of the intervertebral implant 100 and perpendicular to the extending direction of the first strut 32, for example, the pusher member 31 may reciprocate in the length or width direction of the intervertebral implant 100.

It will be appreciated that the first support 1 and the second support 2 may be opened or closed inwardly relative to each other, wherein the expansion of the intervertebral implant 100 may be an increase in the angle between the first support 1 and the second support 2. The first support body 1 and the second support body 2 are sequentially disposed in the height direction of the intervertebral implant 100. For example, as shown in fig. 1, the first support body 1, the driving piece 3, and the second support body 2 are disposed in order in the top-down direction. The first angled slot 14 is specifically an angle between the depth direction of the first angled slot 14 and the intervertebral implant 100.

The intervertebral implant 100 for expanding cervical vertebrae according to the embodiment of the present invention converts the movement of the pushing member 31 along the direction perpendicular to the height direction of the intervertebral implant 100 and perpendicular to the extension direction of the first sliding column 32 into the movement of the first sliding column 32 along the height direction of the intervertebral implant 100 through the first chute 14 on the first support body 1 and the first sliding column 32 of the driving member 3, thereby realizing the transition of the intervertebral implant 100 between the closed state and the expanded state, and having the advantage of simple structure. In addition, with the cooperation of the first sliding post 32 and the first chute 14, the pushing member 31 also moves in the height direction of the intervertebral implant 100, so that the volume occupied by the pushing member 31 between the first support body 1 and the second support body 2 is not changed along with the movement of the pushing member 31 while the upper and lower heights of the first support body 1 and the second support body 2 are raised, and accordingly, the space of the bone cavity is raised correspondingly in the process of transferring the intervertebral implant 100 from the closed state to the open state, so that the implantable bone filling material is raised, and the bone fusion effect of the expandable intervertebral implant 100 is increased. Thus, there are advantages in improving the stability and fusion of the intervertebral implant 100. In addition, the intervertebral implant can be fully expanded, so that the effect of restoring the physiological curvature of the spine is improved.

Accordingly, the intervertebral implant 100 for distracting the cervical vertebrae according to the embodiment of the present invention has the advantages of simple structure, good bone grafting effect, and high bone fusion rate.

For example, as shown in fig. 1, the first strut 32 extends in the width direction of the intervertebral implant 100, and the pusher member 31 moves in the length direction of the intervertebral implant 100. The first chute 14 is inclined in the up-down direction from the front to the rear.

As shown in fig. 3 and 5, the first support body 1 includes a first support main body 11, a first support portion 12 (e.g., left side as viewed in fig. 3) and a second support portion 13 (e.g., right side as viewed in fig. 3), the first support portion 12 and the second support portion 13 are symmetrically disposed on both sides of the first support main body 11 in the width direction of the intervertebral implant 100, each of the first support portion 12 and the second support portion 13 extends from the first support main body 11 toward the direction approaching the second support body 2 in the height direction of the intervertebral implant 100, each of the first support portion 12 and the second support portion 13 has (the first support portion 12 and the second support portion 13 are symmetrically disposed in the width direction of the first support main body 11) a first chute 14, at least two first slide posts 32 are correspondingly disposed in the first chute 14, and a pusher 31 is movably disposed between the first support body 1 and the second support body 2 in the length direction of the intervertebral implant 100. It will be appreciated that each of the first support portion 12 and the second support portion 13 is provided with a first chute 14, the first chute 14 of the first support portion 12 and the first chute 14 of the second support portion 13 are symmetrically arranged along the width direction of the intervertebral implant 100, at least two first slide posts 32 are symmetrically arranged along the width direction of the intervertebral implant on both sides of the pushing member 31, and the first slide posts 32 are slidably engaged with the first chute 14 in a one-to-one correspondence in the sliding depth direction of the first chute 14.

According to the intervertebral implant 100 for distracting the cervical vertebra of the embodiment of the invention, the first sliding column 32 is correspondingly arranged in the first chute 14 on the first supporting part 12 and the second supporting part 13 through the first supporting part 12 and the second supporting part 13 which extend along the height direction of the intervertebral implant 100, so that the space of the bone containing cavity among the first supporting body 1, the second supporting body 2 and the driving piece 3 is improved. This has the advantage of further improving the stability and fusion of the intervertebral implant 100.

In addition, the first support portion 12 and the second support portion 13 are disposed on both sides of the first support body 11, and the first strut 32 is correspondingly disposed on both sides of the pushing member 31, which has an advantage of good structural stability.

As shown in fig. 3 to 7, the first support portion 12 and the second support portion 13 are symmetrically provided with second inclined grooves 15 in the width direction of the intervertebral implant 100, the driving member 3 includes at least two second sliding columns 33, the second sliding columns 33 are correspondingly provided in the second inclined grooves 15, and the first inclined grooves 14 and the second inclined grooves 15 are sequentially provided in the length direction (e.g., the front-rear direction shown in fig. 1 to 3) of the intervertebral implant 100. It will be appreciated that the second tapered slot 15 of the first support portion 12 and the second tapered slot 15 of the second support portion 13 are symmetrically disposed along the width of the intervertebral implant 100. It can be understood that the inclination direction of the first chute 14 is the same as the inclination direction of the second chute 15.

The intervertebral implant 100 for distracting the cervical vertebrae according to the embodiment of the present invention may have the second inclined groove 15 in each of the first and second supporting parts 12 and 13, and the first and second inclined grooves 14 and 15 are sequentially provided along the length direction of the intervertebral implant 100, so that the height of the intervertebral implant 100 in the length direction may be simultaneously adjusted during the transition of the intervertebral implant 100 between the closed state and the distracted state. Thereby, there is increased structural stability and synchronization of the adjustment of the intervertebral implant 100.

As shown in fig. 7, the first support body 11 has a front end and a rear end in the length direction of the intervertebral implant 100, the first inclined groove 14 is disposed near the front end, the second inclined groove 15 is disposed near the rear end, and the first inclined groove 14 is inclined at a smaller angle than the second inclined groove 15 so that the pushing member 31 can move in the length direction of the intervertebral implant 100 to change the relative distance and angle of the first support body 1 and the second support body 2. It can be understood that the inclination direction of the first chute 14 is the same as the inclination direction of the second chute 15, but the inclination angles of the two are different. The inclination angle of the first inclined groove 14 means an angle between the depth direction of the first inclined groove 14 and the height direction of the intervertebral implant 100, and the inclination angle of the second inclined groove 15 means an angle between the depth direction of the second inclined groove 15 and the height direction of the intervertebral implant 100.

The intervertebral implant 100 for distracting the cervical vertebrae according to the embodiment of the present invention has the first sliding column 32 moving up the intervertebral implant 100 a greater distance than the second sliding column 33 moving up the intervertebral implant 100 when the pushing member 31 moves the same distance by the first inclined groove 14 having a smaller inclination angle than the second inclined groove 15. Thereby, the angle between the first support body 1 and the second support body 2 is adjusted, and thus, the intervertebral implant 100 can be adapted to different patients, and the applicability of the intervertebral implant 100 is improved.

As shown in fig. 3 and 6, the second support body 2 has a third inclined groove 24 opened toward one side of the first support body 1, the inclined direction of the third inclined groove 24 is opposite to the inclined direction of the first inclined groove 14 (the inclined angle may be the same or different), the third inclined groove 24 is disposed to intersect the first inclined groove 14, and the first slide post 32 is correspondingly and movably disposed in the third inclined groove 24 in the depth direction of the third inclined groove 24 so that the first support body 1 and the second support body 2 may be moved toward or away from each other. It will be appreciated that the first slide post 32 not only moves in the oblique direction of the first chute 14, but that the first slide post 32 also correspondingly and movably fits within the third chute 24 in the depth direction of the third chute 24.

The intervertebral implant 100 for distracting cervical vertebrae according to the embodiment of the present invention is disposed by crossing the first chute 14 provided on the first support body 1 and the third chute 24 provided on the second support body 2, and the first slide column 32 may be simultaneously slidably fitted to the first chute 14 and the third chute 24. Thus, the first support 1 and the second support 2 may be close to each other or far from each other. Thereby, there is an advantage in that the height adjustment efficiency of the intervertebral implant 100 is improved.

As shown in fig. 3, the first chute 14 is inclined in the up-down direction from front to back, and the third chute 24 is inclined in the up-down direction from back to front. The first chute 14 is inclined by 45 ° in the up-down direction from the front to the rear, the third chute 24 is inclined by 45 ° in the up-down direction from the rear to the front, and the first chute 14 is inclined by an angle smaller than or equal to the second chute 15.

As shown in fig. 3 and 5, the second support body 2 includes a second support body 21, a third support portion 22 and a fourth support portion 23, the third support portion 22 and the fourth support portion 23 being symmetrically disposed on both sides of the second support body 21 in the width direction of the intervertebral implant 100, the third support portion 22 and the fourth support portion 23 each extending from the second support body 21 toward a direction approaching the first support body 1, each of the third support portion 22 and the fourth support portion 23 being provided with a third inclined groove 24, and the first strut 32 being correspondingly and movably disposed within the third inclined groove 24 in the depth direction of the third inclined groove 24.

It will be appreciated that each of the third support portion 22 and the fourth support portion 23 is provided with a third chute 24, the first chute 14 of the third support portion 22 and the third chute 24 on the fourth support portion 23 are symmetrically arranged along the width direction of the intervertebral implant 100, the first slide posts 32 have at least two, wherein the two first slide posts 32 are symmetrically arranged along the width direction of the intervertebral implant on both sides of the pushing member 31, and the first slide posts 32 are correspondingly slidably fitted with the third chute 24.

The intervertebral implant 100 for distracting the cervical vertebrae according to the embodiment of the present invention may form an accommodating space by the third support part 22 and the fourth support part 23 extending in the height direction of the intervertebral implant 100, the second support body 21, the third support part 22, and the fourth support part 23. Thus, the space between the third support body, the fourth support body and the driving member 3 for accommodating the bone grafting material is lifted. This has the advantage of further improving the stability and fusion of the intervertebral implant 100.

Further, the third chute 24 of the third support portion 22 and the third chute 24 of the fourth support portion 23 are located at both sides of the second support body 21, and the first slide posts 32 are provided at both sides of the pusher 31, respectively. This has the advantage of improving the force balance of the second support body 21.

As shown in fig. 3 to 7, the third inclined groove 24 and the first inclined groove 14 are symmetrically disposed at a predetermined plane perpendicular to the height direction of the intervertebral implant 100.

The intervertebral implant 100 for distracting the cervical vertebra according to the embodiment of the present invention may be disposed symmetrically in a predetermined plane perpendicular to the height direction of the intervertebral implant 100 through the third inclined groove 24 and the first inclined groove 14, so that the first support body 1 and the second support body 2 may be moved toward or away from each other without being relatively deviated in the front-rear direction of the intervertebral implant 100. Thereby, the structural stability of the intervertebral implant 100 is further improved.

As shown in fig. 3 and 6, the second support body 2 includes a second support body 21, a third support portion 22 and a fourth support portion 23, the third support portion 22 and the fourth support portion 23 are symmetrically disposed at both ends of the second support body 21 in a width direction of the intervertebral implant 100, the third support portion 22 and the fourth support portion 23 are each provided with a third chute 24 and a fourth chute 25, the first slide post 32 is correspondingly and movably disposed in the third chute 24 in a depth direction of the first chute 14, the second slide post 33 is correspondingly and movably disposed in the fourth chute 25 in a depth direction of the fourth chute 25, the third chute 24 and the first chute 14 are symmetrically disposed in a preset plane perpendicular to a height direction of the intervertebral implant 100, and the fourth chute 25 and the second chute 15 are symmetrically disposed in the preset plane so that the first support body 1 and the second support body 2 are moved toward or away from each other.

It will be appreciated that each of the first and second support portions 12, 13 has a first and second chute 14, 15, and that the third and fourth support portions 22, 23 are provided with a third and fourth chute 24, 25.

The intervertebral implant 100 for distracting the cervical vertebrae according to the embodiment of the present invention is formed by the first and second inclined grooves 14 and 15 on each of the first and second supporting parts 12 and 13, and the third and fourth inclined grooves 24 and 25 on each of the third and fourth supporting parts 22 and 23. The length of the intervertebral implant 100 may be adjusted simultaneously during the transition of the intervertebral implant 100 between the closed and open positions. Thereby further improving the structural stability and synchronization of the adjustment of the intervertebral implant 100.

In addition, the first inclined groove 14 is inclined at an angle smaller than that of the second inclined groove 15 so that the pusher 31 can change the heights and angles of the first support body 1 and the second support body 2 while moving along the length direction of the intervertebral implant 100, since the distance by which the pusher 31 moves is the same, the distance by which the first sliding column 32 moves up the intervertebral implant 100 is greater than the distance by which the second sliding column 33 moves up the intervertebral implant 100. Thereby, the angle between the first support body 1 and the second support body 2 is adjusted, so that the intervertebral implant 100 can be adapted to different patients, and the applicability of the intervertebral implant 100 is improved. For example, as shown in fig. 3, the first chute 14, the second chute 15 are inclined in the front-to-rear direction in the up-down direction, the first chute 14 is 45 °, the second chute 15 is 50 °, the third chute 24 is inclined in the rear-to-front direction in the up-down direction, the third chute 24 is 45 °, and the fourth chute 25 is 50 °.

In addition, the third inclined groove 24 and the first inclined groove 14 are symmetrically disposed at a predetermined plane perpendicular to the height direction of the intervertebral implant 100, and the fourth inclined groove 25 and the second inclined groove 15 are symmetrically disposed along the predetermined plane, and may be moved toward or away from each other at the first support body 1 and the second support body 2, and the first support body 1 and the second support body 2 do not relatively move in the front-rear direction of the intervertebral implant 100. Thereby, the structural stability of the intervertebral implant 100 is further improved.

As shown in fig. 9 and 10, the first spool 32 includes a first cylinder 321 and a first limit projection 322, the first limit projection 322 having a first slip surface, the first slip surface being in contact with a groove wall surface of the first chute 14. The second spool 33 includes a second spool 331 and a second stopper protrusion 332, the second stopper protrusion 332 having a second sliding surface, the second sliding surface being in contact with a wall surface of the second chute 15.

The intervertebral implant 100 for distracting the cervical vertebrae according to the embodiment of the present invention may increase the contact area of the first strut 32 with the first chute 14 by the first strut 321 and the first limiting protrusion 322 of the first strut 32. Accordingly, the contact area between the second slide post 33 and the second chute 15 can be increased by the second slide post 33 and the second stopper protrusion 332.

As shown in fig. 9 and 10, the first limiting projection 322 further includes a third sliding surface in contact with the groove wall surface of the third inclined groove 24, the first sliding surface and the second sliding surface being symmetrically disposed at a predetermined plane perpendicular to the height direction of the intervertebral implant 100, each of the first sliding surface and the third sliding surface being disposed tangentially to the outer circumferential wall of the first cylinder so that the first spool 32 forms a drop-shaped cross section.

The intervertebral implant 100 for distracting the cervical vertebra according to the embodiment of the present invention is symmetrically disposed in a preset plane perpendicular to the height direction of the intervertebral implant 100 through the first sliding surface and the second sliding surface, each of which is disposed tangentially to the outer circumferential wall of the first cylinder. Thereby, the contact area of the first spool 32 with the first chute 14 can be further increased.

Further, the first spool 32 has a cross section in the shape of a drop. Thereby, not only the contact area of the first slide post 32 with the first chute 14 is increased, but also the second slide post 33 can be prevented from coming out of the second and fourth chutes 25.

The second limiting projection 332 further includes a fourth sliding surface in contact with the groove wall surface of the fourth chute 25, the second sliding surface and the fourth sliding surface being symmetrically disposed at a predetermined plane perpendicular to the height direction of the intervertebral implant 100, each of the second sliding surface and the second sliding surface being disposed tangentially to the outer circumferential wall of the second cylinder so that the second strut 33 forms a drop-shaped cross section.

Further, the second spool 33 has a water drop shape in cross section. Thereby, the contact area of the second spool 33 with the second chute 15 can be increased; but also prevents the second runner 33 from coming out of the second chute 15 and the fourth chute 25.

Further, the included angle between the first sliding surface and the third sliding surface is more than or equal to 90 degrees and less than or equal to 180 degrees;

further, the included angle between the second sliding surface and the fourth sliding surface is more than or equal to 90 degrees and less than or equal to 180 degrees.

As shown in fig. 2 and 8, the intervertebral implant 100 for distracting cervical vertebrae further includes a positioning frame 4, and the positioning frame 4 is sleeved outside the first support body 1 and the second support body 2 so as to prevent or reduce displacement of the first support body 1 and the second support body 2 in a direction perpendicular to a height direction of the intervertebral implant 100.

The intervertebral implant 100 for supporting cervical vertebra according to the embodiment of the invention can limit the positions of the first support body 1 and the second support body 2 in the width direction and the height direction of the intervertebral implant 100 by mutually matching the positioning surrounding frame 4 with each of the first support body 1 and the second support body 2. This has the advantage of further improving the structural stability of the intervertebral implant 100.

As shown in fig. 2 and 8, the positioning peripheral frame 4 includes a peripheral frame body 41 and a first guide projection 42, the first guide projection 42 being provided on one side of the peripheral frame body 41 to extend toward the side near the first support body 1, the first support body 1 having the first positioning groove 16 thereon, the first guide projection 42 being movably provided in the first positioning groove 16 in the height direction of the intervertebral implant 100.

The intervertebral implant 100 for supporting the cervical vertebra according to the embodiment of the invention is in guiding fit with the first positioning groove 16 on the first support body 1 in the height direction of the intervertebral implant 100 through the first guiding convex part 42 of the positioning surrounding frame 4. This has the advantage of further improving the structural stability of the intervertebral implant 100.

As shown in fig. 2 and 8, the positioning peripheral frame 4 further includes a second guide protrusion 43, the second guide protrusion 43 is disposed on one side of the peripheral frame body 41 to extend toward the side near the second support body 2, the second support body 2 has a second positioning groove 26 thereon, and the second guide protrusion 43 is movably disposed in the second positioning groove 26 in the height direction of the intervertebral implant 100.

The intervertebral implant 100 for distracting the cervical vertebra according to the embodiment of the invention is guided and matched with the second positioning groove 26 on the second support body 2 in the height direction of the intervertebral implant 100 by the second guiding convex part 43 of the positioning surrounding frame 4. Thereby, the structural stability of the intervertebral implant 100 is further improved.

Alternatively, the first guide projection 42 may be plural, wherein two first guide projections 42 are oppositely disposed on the peripheral frame body 41 in the longitudinal direction or the width direction of the intervertebral implant 100. This has the advantage of further improving the structural stability of the intervertebral implant 100. For example, as shown in fig. 8, there are two first guide protrusions 42, and the two first guide protrusions 42 are oppositely disposed on the peripheral frame body 41 along the length direction of the intervertebral implant 100.

Alternatively, the second guide protrusions 43 may be plural, wherein two second guide protrusions 43 are oppositely disposed on the peripheral frame body 41 in the length direction or the width direction of the intervertebral implant 100. This has the advantage of further improving the structural stability of the intervertebral implant 100. For example, as shown in fig. 8, there are two second guide protrusions 43, and the two second guide protrusions 43 are oppositely disposed on the peripheral frame body 41 along the length direction of the intervertebral implant 100.

Further, a first guide projection 42 and a second guide projection 43 are provided on the peripheral frame body 41 so as to be opposite to each other in the height direction of the intervertebral implant 100.

As shown in fig. 9 to 12, the driving member 3 further includes a driving rod 34, where the driving rod 34 includes a mating portion 341, a connecting portion 342, and an end portion 343 that are sequentially connected, a step is formed between the connecting portion 342 and the end portion 343, a mating hole 411 is formed on the surrounding frame body 41, a through hole 312 is formed on the pushing member 31, the mating portion 341 is disposed in the mating hole 411 in a penetrating manner, the connecting portion 342 is disposed in the through hole 312 in a penetrating manner, and the driving member 3 is abutted to the step.

The intervertebral implant 100 for distracting the cervical vertebrae according to the embodiment of the present invention may be moved by the driving rod 34 in cooperation with the pushing member 31 so as to achieve the transition of the intervertebral implant 100 between the closed state and the distracted state. Thus, the method has the advantage of convenience in operation.

Alternatively, the mating hole 411 may be a threaded hole and the mating portion 341 may be a threaded section, such as shown in fig. 11.

Optionally, the end 343 of the drive rod 34 is provided with one of a plum blossom groove, a cross groove and a straight groove.

According to the intervertebral implant 100 for stretching cervical vertebrae of the embodiment of the invention, through the rotation of the driving member 3, the driving member 3 can move along the length direction of the intervertebral implant 100, and then the connecting part 342 is penetrated in the through hole 312 and the driving member 3 is abutted on the step, so that the pushing member 31 is driven to move along the length direction of the intervertebral implant 100, and the intervertebral implant 100 is converted between the folded state and the stretched state, and the intervertebral implant 100 is adjusted to the optimal position of the vertebral column. Therefore, the method has the advantage of improving the accuracy and controllability of adjustment.

Optionally, as shown in fig. 10 to 12, a snap ring 35 is further sleeved on the driving rod 34 between the pushing member 31 and the surrounding frame body 41 to prevent the driving rod 34 from being removed from the threaded hole, it is understood that when the driving rod 34 is about to be removed from the threaded hole, the snap ring 35 may be matched with the driving rod 34, so as to prevent the driving rod 34 from continuously moving in a direction of being removed from the threaded hole, thereby improving the reliability of the intervertebral implant 100 in use.

As shown in fig. 9 and 10, the peripheral frame body 41 has an anterior side and a posterior side along the length of the intervertebral implant 100, and the anterior side is provided with a bone grafting hole 412 for filling the bone-receiving cavity with bone grafting material. Thus, when the closed state is changed to the open state, bone grafting materials are filled into the bone containing cavity. Therefore, the method has the advantages of good bone grafting effect and high bone fusion rate.

Optionally, the mating hole 411 is disposed at the rear side of the surrounding frame body 41, the bone grafting hole 412 is disposed at the front side of the surrounding frame body 41, and the through hole 312, the mating hole 411 and the bone grafting hole 412 of the pushing member 31 are disposed on the same line.

When the intervertebral implant 100 is implanted, the implant passes through the bone grafting holes 412, the through holes 312 and is connected with the driving rod 34, and drives the driving rod 34 to rotate. Thus, the drive rod 34 moves in the anterior-posterior direction of the intervertebral implant 100 as it rotates. As shown in fig. 3 and 8, the front side of the enclosure frame body 41 is further provided with a holding groove 413 or a holding protrusion for the insertion of a wrench to clamp the enclosure frame body 41.

The intervertebral implant 100 for distracting cervical vertebrae according to the embodiment of the present invention positions the positioning surrounding frame 4 through the holding groove 413 or the holding protrusion convenient implanter provided at the front side of the surrounding frame body 41. Thus, when the driving member 3 moves in the anterior-posterior direction of the intervertebral implant 100, the relative movement of the first support body 1 and the second support body 2 can be avoided. Thereby improving the reliability of the structure of the intervertebral implant 100.

As shown in fig. 3 and 8, the surrounding frame body 41 is provided with escape grooves 414 on both sides in the width direction of the intervertebral implant 100.

According to the intervertebral implant 100 for stretching cervical vertebra, the avoidance grooves 414 are formed in the surrounding frame body 41 along the two sides of the width direction of the intervertebral implant 100, so that interference between the first sliding column 32 and the surrounding frame body 41 can be avoided.

As shown in fig. 9 and 10, the pusher 31 is a hollow accommodating portion 311.

The intervertebral implant 100 for distracting cervical vertebrae according to the embodiment of the present invention can further increase the space of the bone-receiving cavity by forming the pushing member 31 as the hollow receiving part 311. Thus, the amount of implantable bone filler material may be increased, increasing the bone fusion effect of the distractable intervertebral implant 100.

As shown in fig. 3 to 7, the side of the first support body 1 away from the second support body 2 has a plurality of first teeth 17, and the side of the second support body 2 away from the first support body 1 has a plurality of second teeth 27.

According to the intervertebral implant 100 for stretching cervical vertebrae, the fusion effect between the first support body 1 and the vertebral bodies can be improved by arranging the plurality of first convex teeth 17 on one side of the first support body 1 far away from the second support body 2. Similarly, the second supporting body 2 is far away from the side of the first supporting body 1 and provided with a plurality of second convex teeth 27, so that the fusion effect between the second supporting body 2 and the vertebral body can be improved.

Alternatively, the inclination angle between the plurality of first teeth 17 may be different, and similarly, the inclination angle between the plurality of second teeth 27 may be different. So that the convex teeth of different angles can be fused with the corresponding vertebral bodies more fully and conform to the physiological angle between the vertebrae more, thereby improving the surgical effect of the intervertebral implant 100.

As shown in fig. 5 and 7, a side of the first support body 1 away from the second support body 2 is a convex curved surface. Thereby, the degree of fitting between the first support body 1 and the vertebral body (the upper mating surface of the vertebral body is a concave curved surface) can be improved.

Optionally, a side of the first support body 1 away from the second support body 2 is a convex arc surface.

As shown in fig. 2 and 4, the thickness of the second support body 2 decreases in a direction along the length of the intervertebral implant 100 from one end of the second support body 2 (e.g., the front end shown in fig. 2) to the other end of the second support body 2 (e.g., the rear end shown in fig. 2).

Alternatively, the thickness of the second support body 2 is tapered in the anterior-to-posterior direction along the length of the intervertebral implant 100.

At least one of the first support 1 and the second support 2 is a porous structure (not shown). In other words, the first support 1 is provided with a porous structure, or the second support 2 is provided with a porous structure; alternatively, each of the first support 1 and the second support 2 is provided with a porous structure. Thereby, the fusion effect between the first support body 1 and the second support body 2 and the upper and lower vertebral bodies can be improved, and the stability of the intervertebral implant 100 after implantation can be improved.

As shown in fig. 4, at least one of the first support body 1 and the second support body 2 is provided with a bone grafting window 19. Thereby, the fusion effect between the first support body 1 and the second support body 2 and the upper and lower vertebral bodies can be improved, and the stability of the intervertebral implant 100 after implantation can be improved.

Alternatively, the first support 1 and the second support 2 may be made of various materials such as titanium alloy, tantalum, niobium-zirconium alloy, and the like.

Optionally, at least one of the first support body 1 and the second support body 2 is a 3D printing piece, for example, the first support body 1 and the second support body 2 may be 3D printing pieces, so that the first support body 1 and the second support body 2 may be printed out into the first support body 1 and the second support body 2 with different models and specifications according to actual needs of different patients, and the manufacturing process of the intervertebral implant 100 may be shortened, and the production cost of the intervertebral implant 100 may be reduced.

As shown in fig. 1, 3 and 4, the intervertebral implant for distracting the cervical vertebrae further includes a first coupling member 51, and the first support body is provided with a first coupling hole 18 through which the first coupling member 51 is inserted so that the first coupling member 51 is coupled with the vertebral body. Thereby, the stability of the connection of the intervertebral implant 100 to the vertebral body can be further improved.

As shown in fig. 1, 3 and 4, the intervertebral implant for distracting the cervical vertebrae further includes a second coupling member 52, and the second support body 2 is provided with a second coupling hole 28 through which the second coupling member 52 is inserted so that the second coupling member 52 is coupled with the vertebral body. Thereby, the stability of the connection of the intervertebral implant 100 to the vertebral body can be further improved.

Alternatively, the first and second connection members 51 and 52 may be screws, and the first and second connection holes 18 and 28 may be screw holes.

The intervertebral implant system according to the embodiment of the present invention includes an implant and the intervertebral implant 100 for distracting a cervical vertebra according to any one of the above, the implant being connected to the pushing member 31, the implant being configured to adjust a position of the pushing member 31 so as to move the first sliding column 32 in an oblique direction of the first oblique groove 14 by the pushing member 31 to achieve a transition of the intervertebral implant 100 between the closed state and the distracted state. Accordingly, the intervertebral implant 100 for distracting the cervical vertebrae according to the embodiment of the present invention has advantages of good bone grafting effect and high bone fusion rate.

The application of the intervertebral implant 100 for distracting the cervical vertebrae of the embodiments of the present invention is applied to the cervical vertebrae, the thoracic vertebrae, or the lumbar vertebrae.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims

1. An intervertebral implant for distracting a cervical spine, the intervertebral implant having an distracted state and a closed state, the intervertebral implant comprising:

A first support body and a second support body detachably provided along a height direction of the intervertebral implant so as to form a bone-receiving cavity, the first support body having a first chute provided obliquely with respect to the height direction of the intervertebral implant, the first chute having a notch opened toward the second support body;

the driving piece is arranged between the first supporting body and the second supporting body in the height direction of the intervertebral implant, the driving piece comprises a pushing piece and a first sliding column which are connected, the first sliding column is in sliding fit in the first chute, the pushing piece is movable along the height direction of the intervertebral implant and perpendicular to the extending direction of the first sliding column, and the first sliding column is driven to move along the inclined direction of the first chute through the pushing piece so as to realize the transition of the intervertebral implant between the folded state and the open state;

the first support body comprises a first support main body, a first support part and a second support part, each of the first support part and the second support part is provided with the first chute, at least two first slide columns are arranged, and the first slide columns are slidably matched in the first chute along the depth direction of the first chute;

Each of the first support part and the second support part is provided with a second chute, the driving piece comprises at least two second slide columns, the second slide columns are correspondingly arranged in the second chute, and the first chute and the second chute are sequentially arranged along the length direction of the intervertebral implant;

the first support body has a front end and a rear end along a length direction of the intervertebral implant, the first chute is disposed near the front end, the second chute is disposed near the rear end, and the first chute inclination angle is smaller than the second chute inclination angle, so that the pushing member can move along the length direction of the intervertebral implant to change heights and angles of the first support body and the second support body.

2. An intervertebral implant for distracting a cervical vertebra according to claim 1, wherein the first and second support portions are symmetrically disposed on both sides of the first support body in a width direction of the intervertebral implant, the first and second support portions each extending from the first support body toward a direction approaching the second support body in a height direction of the intervertebral implant, and the pushing member is movably disposed between the first and second support bodies in a length direction of the intervertebral implant.

3. An intervertebral implant for distracting a cervical vertebra according to claim 1, wherein the second support body has a third chute opened toward one side of the first support body, the third chute being disposed intersecting the first chute, the first slide post being correspondingly and movably disposed in the third chute in a depth direction of the third chute so that the first support body and the second support body are moved toward or away from each other.

4. An intervertebral implant for distracting a cervical vertebra according to claim 3, wherein the second support body comprises a second support body, a third support portion and a fourth support portion, the third support portion and the fourth support portion being symmetrically disposed on both sides of the second support body in a width direction of the intervertebral implant, the third support portion and the fourth support portion each extending from the second support body toward a direction approaching the first support body, each of the third support portion and the fourth support portion being provided with a third chute, the first slide post being correspondingly and movably disposed within the third chute in a depth direction of the third chute;

And/or, the third chute and the first chute are symmetrically arranged on a preset plane perpendicular to the height direction of the intervertebral implant.

5. An intervertebral implant for distracting a cervical vertebra according to claim 1, wherein the second support body includes a second support body, a third support portion and a fourth support portion symmetrically disposed at both ends of the second support body in a width direction of the intervertebral implant, the third support portion and the fourth support portion are each provided with a third chute and a fourth chute, the first slide post is correspondingly and movably disposed in the third chute in a depth direction of the first chute, the second slide post is correspondingly and movably disposed in the fourth chute in a depth direction of the fourth chute, the third chute and the first chute are symmetrically disposed in a preset plane perpendicular to a height direction of the intervertebral implant, and the fourth chute and the second chute are symmetrically disposed in the preset plane so that the first support body and the second support body are moved closer to or farther away from each other.

6. An intervertebral implant for distracting a cervical vertebra according to claim 5, wherein the first chute is inclined 45 ° in a front-to-back direction in an up-down direction, the third chute is inclined 45 ° in a back-to-front direction in the up-down direction, and the first chute inclination angle is less than or equal to the second chute inclination angle.

7. An intervertebral implant for distracting a cervical vertebra as recited in claim 5 wherein the first strut comprises a first strut and a first stop tab, the first stop tab having a first sliding surface in contact with a wall surface of the first angled slot;

and/or, the second sliding column comprises a second column body and a second limiting protrusion, the second limiting protrusion is provided with a second sliding surface, and the second sliding surface is in contact with the groove wall surface of the second chute.

8. The intervertebral implant for distracting a cervical vertebra of claim 7, wherein the first stop projection further comprises a third sliding surface in contact with a wall surface of the third angled slot, the first sliding surface and the second sliding surface being symmetrically disposed in a predetermined plane perpendicular to a height direction of the intervertebral implant, each of the first sliding surface and the third sliding surface being tangential to a peripheral wall of the first cylinder;

and/or, the second limiting protrusion further comprises a fourth sliding surface, the fourth sliding surface is in contact with the groove wall surface of the fourth chute, the second sliding surface and the fourth sliding surface are symmetrically arranged on a preset plane perpendicular to the height direction of the intervertebral implant, and each of the second sliding surface and the second sliding surface is tangent to the peripheral wall of the second cylinder.

9. An intervertebral implant for distracting a cervical vertebra as recited in claim 8, wherein the first strut is drop-shaped in cross-section;

and/or, the cross section of the second sliding column is in a water drop shape;

and/or the included angle between the first sliding surface and the third sliding surface is more than or equal to 90 degrees and less than or equal to 180 degrees;

and/or the included angle between the second sliding surface and the fourth sliding surface is more than or equal to 90 degrees and less than or equal to 180 degrees.

10. An intervertebral implant for distracting a cervical vertebra as recited in any one of claims 1-9, further comprising a positioning enclosure surrounding the first support and the second support to limit displacement of the first support and the second support in a direction perpendicular to a height of the intervertebral implant.

11. An intervertebral implant for distracting a cervical vertebra as recited in claim 10, wherein the positioning enclosure comprises an enclosure body and a first guide projection disposed on a side of the enclosure body extending toward a side proximate the first support body, the first support body having a first positioning slot thereon, the first guide projection being movably disposed within the first positioning slot along a height direction of the intervertebral implant;

And/or, the positioning surrounding frame further comprises a second guide convex part, wherein the second guide convex part is arranged on one side of the surrounding frame body and extends towards one side close to the second supporting body, the second supporting body is provided with a second positioning groove, and the second guide convex part is movably arranged in the second positioning groove along the height direction of the intervertebral implant.

12. The intervertebral implant for distracting a cervical vertebra of claim 10, wherein the driving member further comprises a driving rod including a mating portion, a connecting portion and an end portion connected in sequence, a step is formed between the connecting portion and the end portion, a mating hole is formed in the surrounding frame body, a through hole is formed in the pushing member, the mating portion is inserted into the mating hole, the connecting portion is inserted into the through hole, and the driving member abuts against the step.

13. An intervertebral implant for distracting a cervical vertebra according to claim 10, wherein the surrounding frame body has a front side and a rear side along a length direction of the intervertebral implant, and the front side is provided with a bone grafting hole so as to fill bone grafting material into the bone containing cavity;

And/or, the front side of the surrounding frame body is also provided with a holding groove or a holding protrusion so as to be convenient for the implantation wrench to clamp the surrounding frame body;

and/or, the surrounding frame body is provided with avoidance grooves along two sides of the width direction of the intervertebral implant.

14. An intervertebral implant for distracting a cervical vertebra according to any one of claims 1-4, wherein the pusher is a hollow receptacle.

15. An intervertebral implant for distracting a cervical vertebra as recited in any one of claims 1-4, wherein a side of the first support body remote from the second support body has a plurality of first teeth;

and/or, one side of the first support body far away from the second support body is a convex curved surface;

and/or, one side of the second support body far away from the first support body is provided with a plurality of second convex teeth;

and/or the thickness of the second support body decreases along the length direction of the intervertebral implant from one end of the second support body to the other end of the second support body;

and/or at least one of the first support and the second support is a porous structure;

and/or at least one of the first support body and the second support body is provided with a bone grafting window.

16. An intervertebral implant for distracting a cervical vertebra according to any one of claims 1-4, further comprising a first connector, the first support body being provided with a first connection hole through which the first connector passes for connection of the first connector to a vertebral body;

and/or, the vertebral body connecting device further comprises a second connecting piece, and the second supporting body is provided with a second connecting hole for the second connecting piece to penetrate through so that the second connecting piece is connected with the vertebral body.

17. An intervertebral implant system comprising an implant and an intervertebral implant for distracting a cervical vertebra according to any one of claims 1-12, the implant being connected to the pusher, the implant being configured to adjust the position of the pusher so that the first strut is driven by the pusher to move in an oblique direction of the first chute to effect transition of the intervertebral implant between the closed and distracted states.