CN217793481U

CN217793481U - Intervertebral fusion device

Info

Publication number: CN217793481U
Application number: CN202220467063.8U
Authority: CN
Inventors: 郑学艺; 李健
Original assignee: Beijing Libeier Bio Engineering Institute Co Ltd
Current assignee: Beijing Libeier Bio Engineering Institute Co Ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-11-15
Anticipated expiration: 2032-03-04

Abstract

The utility model provides an interbody fusion cage, include: a first plate body; the second plate body is arranged below the first plate body; the adjusting structure comprises a first adjusting block and a second adjusting block which are arranged at intervals, and the first adjusting block and the second adjusting block are both arranged between the first plate body and the second plate body; the adjusting column is used for adjusting the distance between the first adjusting block and the second adjusting block, and when the distance between the first adjusting block and the second adjusting block changes, the first plate body and the second plate body slide relative to the adjusting structure so as to adjust the distance between the first plate body and the second plate body; the locking structure rotationally sets up on first regulating block, and when the locking structure was located the unblock position, the regulation post was dodged to the locking structure, and when the locking structure was located latched position, the locking structure cooperated with regulation post butt. The technical scheme of this application can solve effectively that the interbody fusion cage among the correlation technique is implanted and is received the extrusion height to diminish and make the poor problem of support effect behind the patient internal.

Description

Intervertebral fusion cage

Technical Field

The utility model relates to a false body technical field particularly, relates to an interbody fusion cage.

Background

In daily life, cases of vertebral body damage due to tumors, fractures, infections, etc. occur occasionally, such as degenerative disc disease, disc herniation, osteoporosis, spondylolisthesis, stenosis, tumors, scoliosis and other curvature abnormalities, kyphosis and fractures may result from factors including trauma, disease, and degenerative conditions caused by injury and aging.

Spinal disorders often result in symptoms that include deformities, pain, nerve damage, and partial or complete loss of mobility, and surgical treatments for these spinal disorders include fusion, fixation, correction, partial or complete discectomy, corpectomy and laminectomy, and implantable prostheses. As part of these surgical treatments, spinal constructs such as bone fasteners, spinal rods, and interbody devices can be used to provide stability to the treated area.

The mode that adopts at present is implanting a fusion cage between the centrum that damages, makes bone tissue produce and creeps and replaces to restore the centrum of damage, however traditional centrum fusion cage height is fixed, and human intervertebral height can vary from person to person, can't be fit for different patient's different intervertebral height through the height of adjusting the centrum fusion cage in the operation, thereby can't make the interbody height of centrum fusion cage adaptation human completely, and the fusion cage height and the unable regulation of angle after the cone of packing into. Generally, a fusion cage with a height adjusting function is provided, wherein a screw is usually adopted to drive two sliding blocks to approach or separate, so that the height between an upper final plate and a lower final plate connected with the sliding blocks is increased or decreased, and the height change of the fusion cage is realized.

After the intervertebral fusion cage with the adjustable height is implanted into a patient for a period of time, the intervertebral fusion cage is extruded between an upper vertebral body and a lower vertebral body, so that the screw rod is withdrawn from the sliding block, the height of the whole fusion cage is reduced, and the supporting effect on the vertebral bodies of the patient is poor.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide an interbody fusion cage to solve interbody fusion cage among the correlation technique and receive the extrusion height after implanting the patient internal and diminish and make the poor problem of support effect.

In order to achieve the above object, the present invention provides an intervertebral fusion cage, comprising: a first plate body; the second plate body is arranged below the first plate body; the adjusting structure comprises a first adjusting block and a second adjusting block which are arranged at intervals, and the first adjusting block and the second adjusting block are both arranged between the first plate body and the second plate body; the adjusting column penetrates through the first adjusting block and is connected with the second adjusting block so as to adjust the distance between the first adjusting block and the second adjusting block, and when the distance between the first adjusting block and the second adjusting block changes, the first plate body and the second plate body slide relative to the adjusting structure so as to adjust the distance between the first plate body and the second plate body; the locking structure is rotationally arranged on the first adjusting block and provided with a locking position and an unlocking position, when the locking structure is located at the unlocking position, the locking structure avoids the adjusting column, and when the locking structure is located at the locking position, the locking structure is in butt fit with the adjusting column.

Furthermore, the locking structure is provided with an avoiding concave part for avoiding the adjusting column, and when the locking structure is located at the locking position, the end part of the avoiding concave part is in butt fit with the outer wall of the adjusting column.

Furthermore, the adjusting column comprises a threaded section and a cap body portion arranged at one end of the threaded section, a counter bore is formed in the first adjusting block, the cap body portion penetrates through the counter bore and is matched with the locking structure, a threaded hole is formed in the second adjusting block, and the threaded section penetrates through the threaded hole.

Furthermore, a plurality of first anti-skid convex teeth are arranged on the upper surface of the first plate body, and each first anti-skid convex tooth extends along the width direction of the first plate body; a plurality of second anti-skidding convex teeth are arranged on the lower surface of the second plate body, and each second anti-skidding convex tooth extends along the width direction of the second plate body.

Furthermore, a plurality of first anti-skid concave parts are arranged on each first anti-skid convex tooth; each second anti-skid convex tooth is provided with a plurality of second anti-skid concave parts.

Furthermore, the second adjusting block comprises a main body part, a supporting end part and a connecting part for connecting the main body part and the supporting end part, and the supporting end part is arranged at one end of the main body part, which is far away from the first adjusting block; a first sliding structure is arranged between the main body part and the first plate body, the first sliding structure comprises a first slide way and a first sliding block arranged in the first slide way, one of the first slide way and the first sliding block is arranged on the main body part, the other one of the first slide way and the first sliding block is arranged on the first plate body, and a first included angle a is formed between the first sliding block and the main body part in the length direction; a second sliding structure is arranged between the main body part and the second plate body and comprises a second slide way and a second sliding block arranged in the second slide way, one of the second slide way and the second sliding block is arranged on the main body part, the other one of the second slide way and the second sliding block is arranged on the second plate body, and a second included angle b is formed between the second sliding block and the main body part in the length direction; and a third included angle c is formed between the center lines of the first sliding block and the second sliding block.

Furthermore, a third sliding structure is arranged between the first end of the first plate body and the first adjusting block, the third sliding structure comprises a third slide way and a third slide block arranged in the third slide way, one of the third slide way and the third slide block is arranged at the first end of the first plate body, the other one of the third slide way and the third slide block is arranged on the first adjusting block, and a fourth included angle d is formed between the third slide block and the main body part in the length direction; a fourth sliding structure is arranged between the second end of the first plate body and the supporting end portion, the fourth sliding structure comprises a fourth slide way and a fourth sliding block arranged in the fourth slide way, one of the fourth slide way and the fourth sliding block is arranged at the second end of the first plate body, the other of the fourth slide way and the fourth sliding block is arranged on the supporting end portion, and a fifth included angle e is formed between the fourth sliding block and the length direction of the main body portion.

Furthermore, a fifth sliding structure is arranged between the first end of the second plate body and the first adjusting block, the fifth sliding structure comprises a fifth slide way and a fifth slide block arranged in the fifth slide way, one of the fifth slide way and the fifth slide block is arranged at the first end of the second plate body, the other one of the fifth slide way and the fifth slide block is arranged on the first adjusting block, and a sixth included angle f is formed between the fifth slide block and the main body part in the length direction; a sixth sliding structure is arranged between the second end of the second plate body and the supporting end portion, the sixth sliding structure comprises a sixth slide way and a sixth sliding block arranged in the sixth slide way, one of the sixth slide way and the sixth sliding block is arranged at the second end of the second plate body, the other one of the sixth slide way and the sixth sliding block is arranged on the supporting end portion, and a seventh included angle g is formed between the sixth sliding block and the length direction of the main body portion.

Further, the first included angle a, the second included angle b, the fourth included angle d, the fifth included angle e, the sixth included angle f and the seventh included angle g satisfy the following conditions: a = b = d = e = f = g; and/or the presence of a gas in the gas,

the third slide way, the fourth slide way, the fifth slide way and the sixth slide way are U-shaped grooves.

Furthermore, a first opening penetrating through the first plate body is formed in the middle of the first plate body, and a second opening penetrating through the second plate body is formed in the middle of the second plate body.

Use the technical scheme of the utility model, interbody fusion cage includes: first plate body, second plate body, regulation structure, regulation post and locking structure. The regulation post wears to locate the regulation structure to can be through adjusting the distance between first regulating block and the second regulating block and then adjust the distance between first plate body and the second plate body. Therefore, when the interbody fusion cage is implanted into a patient, the distance between the first plate body and the second plate body can be correspondingly adjusted according to the distance between the vertebral bodies of different patients, and the adaptability is high. Meanwhile, the interbody fusion cage further comprises a locking structure which is rotatably arranged on the first adjusting block, the locking structure is provided with a locking position and an unlocking position, and when the locking structure is located at the unlocking position, the locking structure avoids the adjusting column so that the adjusting column can adjust the distance between the first plate body and the second plate body; after adjusting the distance between first plate body and the second plate body for locking structure is located latched position, and locking structure and regulation post butt cooperation can avoid first plate body and second plate body to receive the extrusion of patient's centrum after the regulation post takes place to roll back for first plate body and second plate body and makes interbody fusion cage's height reduce. Therefore, the technical scheme of the application can effectively solve the problem that the intervertebral fusion cage in the related art is implanted into the body of a patient and then is extruded to reduce the height so that the supporting effect is poor.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the scope of the invention. In the drawings:

figure 1 shows an exploded view of an embodiment of an intervertebral cage according to the invention

FIG. 2 illustrates a perspective view of a second adjustment block of the intervertebral cage of FIG. 1;

FIG. 3 illustrates a side view of the second conditioning block of FIG. 2;

fig. 4 shows a perspective view of a first plate of the intervertebral cage of fig. 1;

fig. 5 shows a side view of the first plate body of fig. 4;

fig. 6 illustrates a top view of a second plate of the intervertebral cage of fig. 1;

fig. 7 shows a perspective view of the second plate of fig. 6;

fig. 8 shows a side view of the second plate body of fig. 6;

FIG. 9 illustrates a perspective view of a first adjustment block of the intervertebral cage of FIG. 1;

FIG. 10 illustrates a side view of the first conditioning block of FIG. 9;

FIG. 11 illustrates a perspective view of an adjustment post of the intervertebral cage of FIG. 1; and

figure 12 illustrates a perspective view of the locking mechanism of the intervertebral cage of figure 1.

Wherein the figures include the following reference numerals:

10. a first plate body; 11. a first anti-slip lobe; 12. a first anti-slip recess; 13. a first opening; 20. a second plate body; 21. a second anti-slip lobe; 22. a second anti-slip recess; 23. a second opening; 30. an adjustment structure; 31. a first regulating block; 311. a counter bore; 32. a second regulating block; 321. a threaded hole; 322. a main body portion; 323. a support end portion; 324. a connecting portion; 40. an adjustment column; 41. a threaded segment; 42. a cap body portion; 50. a locking structure; 51. avoiding the concave part; 60. a first sliding structure; 61. a first slideway; 62. a first slider; 70. a second sliding structure; 71. a second slideway; 72. a second slider; 81. a third sliding structure; 811. a third slideway; 812. a third slider; 82. a fourth sliding structure; 821. a fourth slideway; 822. a fourth slider; 91. a fifth sliding structure; 911. a fifth slideway; 912. a fifth slider; 92. a sixth sliding structure; 921. a sixth slideway; 922. and a sixth slide block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1, the intervertebral cage of the present embodiment includes: a first plate 10, a second plate 20, an adjustment structure 30, an adjustment post 40, and a locking structure 50. Wherein, the second plate 20 is disposed below the first plate 10; the adjusting structure 30 comprises a first adjusting block 31 and a second adjusting block 32 which are arranged at intervals, and both the first adjusting block 31 and the second adjusting block 32 are arranged between the first plate body 10 and the second plate body 20; the adjusting column 40 passes through the first adjusting block 31 to be connected with the second adjusting block 32 so as to adjust the distance between the first adjusting block 31 and the second adjusting block 32, and when the distance between the first adjusting block 31 and the second adjusting block 32 is changed, the first plate body 10 and the second plate body 20 slide relative to the adjusting structure 30 so as to adjust the distance between the first plate body 10 and the second plate body 20; the locking structure 50 is rotatably disposed on the first adjusting block 31 and has a locking position and an unlocking position, when the locking structure 50 is located at the unlocking position, the locking structure 50 avoids the adjusting column 40, and when the locking structure 50 is located at the locking position, the locking structure 50 is in abutting fit with the adjusting column 40.

Applying the technical solution of this embodiment, the intervertebral cage comprises: a first plate 10, a second plate 20, an adjustment structure 30, an adjustment post 40, and a locking structure 50. The adjusting column 40 is inserted into the adjusting structure 30, and can adjust the distance between the first plate 10 and the second plate 20 by adjusting the distance between the first adjusting block 31 and the second adjusting block 32. Therefore, when the intervertebral fusion device is implanted into a patient, the distance between the first plate body 10 and the second plate body 20 can be correspondingly adjusted according to the distance between the vertebral bodies of different patients, and the adaptability is strong. Meanwhile, the intervertebral fusion device further comprises a locking structure 50 which is rotatably arranged on the first adjusting block 31, wherein the locking structure 50 has a locking position and an unlocking position, when the locking structure 50 is located at the unlocking position, the locking structure 50 avoids the adjusting column 40 so that the adjusting column 40 can adjust the distance between the first plate body 10 and the second plate body 20; after the distance between the first plate body 10 and the second plate body 20 is adjusted, the locking structure 50 is located at the locking position, the locking structure 50 is in butt fit with the adjusting column 40, and the adjusting column 40 can be prevented from retracting relative to the first plate body 10 and the second plate body 20 after the first plate body 10 and the second plate body 20 are squeezed by the vertebral body of the patient, so that the height of the intervertebral fusion cage is reduced. Therefore, the technical scheme of the embodiment can effectively solve the problem that the intervertebral fusion cage in the related art is implanted into the body of a patient and then has poor supporting effect due to the fact that the height of the intervertebral fusion cage after being extruded becomes small.

As shown in fig. 1 and 12, in the present embodiment, the lock structure 50 is provided with the escape recess 51 of the escape adjustment post 40, and when the lock structure 50 is located at the lock position, an end portion of the escape recess 51 is brought into contact engagement with an outer wall of the adjustment post 40. This prevents the height of the intervertebral cage from being reduced by the withdrawal of the adjustment post 40 relative to the first plate 10 and the second plate 20.

As shown in fig. 1, 11 and 12, the adjusting column 40 includes a threaded section 41 and a cap portion 42 disposed at one end of the threaded section 41, a counter bore 311 is disposed on the first adjusting block 31, the cap portion 42 is inserted into the counter bore 311 and is engaged with the locking structure 50, a threaded hole 321 is disposed on the second adjusting block 32, and the threaded section 41 is inserted into the threaded hole 321. The cap body 42 is disposed in the counterbore 311, and the threaded section 41 is disposed in the threaded hole 321, so that when the interbody fusion cage is implanted, the distance between the first adjusting block 31 and the second adjusting block 32 can be adjusted by rotating the adjusting column 40, and further, the distance between the first plate 10 and the second plate 20 can be adjusted. Meanwhile, the distance between the first plate body 10 and the second plate body 20 is adjusted through thread fit, stepless adjustment can be achieved, intervertebral distances of different patients can be adapted, and adaptability is high.

In this embodiment, a hexagonal adjusting hole is formed in the cap body 42, and an adjusting tool can be inserted into the hexagonal adjusting hole to drive the adjusting post 40 to rotate, so as to drive the first adjusting block 31 and the second adjusting block to approach each other and make the first plate body 10 and the second plate body 20 spread apart in parallel. The height adjusting range of the intervertebral cage is wide, and the intervertebral cage can replace conventional cages (namely cages with non-adjustable height) with various specifications.

In the present embodiment, the locking structure 50 is a screw disposed adjacent to the adjusting column 40, and an arc-shaped notch (i.e., the above-mentioned avoiding concave portion 51) is disposed on a cap body of the screw. The first adjusting block 31 is provided with a mounting hole for mounting the locking structure 50, and the mounting hole is communicated with the counter bore 311.

As shown in fig. 1 and fig. 4 to 8, a plurality of first anti-slip convex teeth 11 are provided on the upper surface of the first plate body 10, and each first anti-slip convex tooth 11 extends in the width direction of the first plate body 10; a plurality of second anti-slip protrusions 21 are provided on the lower surface of the second plate body 20, and each of the second anti-slip protrusions 21 extends in the width direction of the second plate body 20. Through setting up first anti-skidding convex tooth 11 and second anti-skidding convex tooth 21, can prevent that interbody fusion cage from taking place the drunkenness along its length direction between patient's centrum, guarantee interbody fusion cage stability after implanting, and then guarantee the bone fusion effect in later stage.

As shown in fig. 1 and fig. 4 to 6, each first anti-slip tooth 11 is provided with a plurality of first anti-slip concave portions 12; each second antiskid tooth 21 is provided with a plurality of second antiskid concave portions 22. Through setting up first non-slip recess 12 and second non-slip recess 22, can prevent that interbody fusion cage from taking place the drunkenness along its width direction between patient's centrum, guarantee the stability after interbody fusion cage implants, and then guarantee the bone fusion effect in later stage.

As shown in fig. 1 to 8, the second regulation block 32 includes a main body portion 322, a support end portion 323, and a connection portion 324 connecting the main body portion 322 and the support end portion 323, the support end portion 323 being provided at an end of the main body portion 322 remote from the first regulation block 31; a first sliding structure 60 is arranged between the main body part 322 and the first plate body 10, the first sliding structure 60 comprises a first slide way 61 and a first slide block 62 arranged in the first slide way 61, one of the first slide way 61 and the first slide block 62 is arranged on the main body part 322, the other one of the first slide way 61 and the first slide block 62 is arranged on the first plate body 10, and a first included angle a is formed between the first slide block 62 and the main body part 322 in the length direction; a second sliding structure 70 is arranged between the main body part 322 and the second plate body 20, the second sliding structure 70 comprises a second slide way 71 and a second sliding block 72 arranged in the second slide way 71, one of the second slide way 71 and the second sliding block 72 is arranged on the main body part 322, the other one of the second slide way 71 and the second sliding block 72 is arranged on the second plate body 20, and a second included angle b is formed between the second sliding block 72 and the main body part 322 in the length direction; the first slide 62 and the second slide 72 have a third angle c between their centerlines.

Specifically, in the present embodiment, the number of the first sliding blocks 62 and the number of the first sliding ways 61 are two, the two first sliding blocks 62 are respectively disposed on two sides of the main body portion 322 in the width direction, correspondingly, the two first sliding ways 61 are disposed on the first plate body 10, when the adjusting column 40 is screwed to make the first adjusting block 31 and the second adjusting block 32 approach each other, a relative sliding motion is generated between the first sliding ways 61 and the first sliding blocks 62, so that the first plate body 10 moves upward compared with the adjusting structure 30. The number of the second slide ways 71 and the number of the second slide blocks 72 are two, the two second slide blocks 72 are respectively arranged on two sides of the main body portion 322 in the width direction, correspondingly, the two second slide ways 71 are arranged on the second plate body 20, and when the adjusting column 40 is screwed to enable the first adjusting block 31 and the second adjusting block 32 to approach each other, relative sliding is generated between the second slide ways 71 and the second slide blocks 72, so that the second plate body 20 moves downward compared with the adjusting structure 30. Thus, the distance between the first plate body 10 and the second plate body 20 can be made large.

The third included angle c is formed between the center lines of the first sliding block 62 and the second sliding block 72, so that the first plate body 10 and the second plate body 20 are vertically away from each other, the vertical center line of the first plate body 10 and the vertical center line of the second plate body 20 are close to each other, namely, along with the increase of the height of the interbody fusion cage, the length of the interbody fusion cage is reduced, and thus, the areas of the first adjusting block 31 and the second adjusting block 32 exposed out of the first plate body 10 and the second plate body 20 can be reduced in the length direction of the interbody fusion cage, and the spinal cord and the like are prevented from being extruded.

As shown in fig. 1 to 10, a third sliding structure 81 is disposed between the first end of the first plate 10 and the first adjusting block 31, the third sliding structure 81 includes a third slide way 811 and a third slide block 812 disposed in the third slide way 811, one of the third slide way 811 and the third slide block 812 is disposed at the first end of the first plate 10, the other is disposed on the first adjusting block 31, and a fourth included angle d is formed between the third slide block 812 and the length direction of the main body portion 322; a fourth sliding structure 82 is disposed between the second end of the first plate 10 and the supporting end 323, the fourth sliding structure 82 includes a fourth sliding track 821 and a fourth sliding block 822 disposed in the fourth sliding track 821, one of the fourth sliding track 821 and the fourth sliding block 822 is disposed at the second end of the first plate 10, the other is disposed on the supporting end 323, and a fifth included angle e is formed between the fourth sliding block 822 and the length direction of the main body 322.

In this embodiment, the third sliding way 811 is disposed on the first adjusting block 31, and the third sliding block 812 is disposed at the first end of the first board 10; a fourth slide 821 is provided on the supporting end 323, and a fourth slider 822 is provided at the second end of the first plate body 10, so that when the first adjusting block 31 and the second adjusting block 32 are close to each other, the first plate body 10 can be pressed to move the first plate body 10 upward compared to the adjusting structure 30.

As shown in fig. 1 to 10, a fifth sliding structure 91 is arranged between the first end of the second plate body 20 and the first adjusting block 31, the fifth sliding structure 91 includes a fifth slide way 911 and a fifth slide block 912 arranged in the fifth slide way 911, one of the fifth slide way 911 and the fifth slide block 912 is arranged at the first end of the second plate body 20, the other is arranged on the first adjusting block 31, and a sixth included angle f is formed between the fifth slide block 912 and the length direction of the main body portion 322; a sixth sliding structure 92 is arranged between the second end of the second plate body 20 and the supporting end portion 323, the sixth sliding structure 92 includes a sixth sliding channel 921 and a sixth sliding block 922 arranged in the sixth sliding channel 921, one of the sixth sliding channel 921 and the sixth sliding block 922 is arranged at the second end of the second plate body 20, the other is arranged at the supporting end portion 323, and a seventh included angle g is formed between the sixth sliding block 922 and the length direction of the main body portion 322.

In this embodiment, the fifth slide 911 is disposed on the first adjusting block 31, and the fifth slide 912 is disposed at the first end of the second plate body 20; a sixth slide 921 is provided on the supporting end 323 and a sixth slide 922 is provided on the second end of the second plate body 20, so that when the first adjusting block 31 and the second adjusting block 32 are close to each other, the second plate body 20 can be pressed to move the second plate body 20 downward compared to the adjusting structure 30.

In this embodiment, the first included angle a, the second included angle b, the fourth included angle d, the fifth included angle e, the sixth included angle f, and the seventh included angle g satisfy: a = b = d = e = f = g. Therefore, the sliding fit between the slide ways and the slide blocks of the sliding structures can be smoothly performed, and the first plate body 10 and the adjusting structure 30 are prevented from being clamped or the second plate body 20 and the adjusting structure 30 are prevented from being clamped. When the height of the interbody fusion cage is adjusted, the inner part of the interbody fusion cage is parallelly expanded by the symmetrical wedge-shaped structures. In particular, the above-mentioned angle is between 20 ° and 70 °.

As shown in fig. 2, 9 and 10, the third, fourth, fifth and

sixth slide ways

811, 821, 911, 921 are U-shaped grooves. This ensures stability of the movement of the first plate 10 and the second plate 20 during the process of moving away from or toward each other. Meanwhile, the U-shaped groove can provide good supporting force for the third, fourth, fifth and

sixth sliders

812, 822, 912 and 922.

As shown in fig. 1 and 4 to 6, in the present embodiment, a first opening 13 penetrating the first plate 10 is provided at an intermediate position of the first plate 10, and a second opening 23 penetrating the second plate 20 is provided at an intermediate position of the second plate 20. Thus, when the intervertebral fusion device is implanted, bone particles can be filled into the intervertebral fusion device through the first opening 13 and the second opening 23, and bone tissue around the intervertebral space is induced to grow so as to enhance the stability between the vertebral bodies of a patient.

Specifically, the first plate body and the second plate body can be processed by a 3D printing technology by adopting a polyether ether ketone (PEEK) material, and the first plate body and the second plate body which are manufactured in the way have good growth characteristics of bones; the first plate body and the second plate body can be formed by processing titanium alloy and hydroxyapatite materials through a 3D printing technology, so that the manufactured first plate body and the second plate body have the advantage of good affinity with bone tissues, and can induce the differentiation of undifferentiated mesenchymal cells into osteoblast growth.

When carrying out the man-hour of first plate body and second plate body, can carry out the angle setting of customization according to different patients 'intervertebral angle, ensure that the interbody fusion cage after implanting can be attached with patient's centrum better, promote the success rate of operation and reduce the recovery time of patient postoperative.

Use the interbody fusion cage of this embodiment, put into the clearance to between patient's the centrum with it when interbody fusion cage height is minimum, then the height of adjustment interbody fusion cage make it can with the interval phase-match between the patient's centrum, can realize accurate implantation, can avoid adjusting interbody fusion cage's clearance many times to cause the damage to patient's soft tissue.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An intervertebral cage, comprising:

a first plate body (10);

a second plate body (20) arranged below the first plate body (10);

the adjusting structure (30) comprises a first adjusting block (31) and a second adjusting block (32) which are arranged at intervals, and the first adjusting block (31) and the second adjusting block (32) are both arranged between the first plate body (10) and the second plate body (20);

an adjustment post (40) connected to the second adjustment block (32) through the first adjustment block (31) to adjust a distance between the first adjustment block (31) and the second adjustment block (32), wherein when the distance between the first adjustment block (31) and the second adjustment block (32) changes, the first plate body (10) and the second plate body (20) slide relative to the adjustment structure (30) to adjust the distance between the first plate body (10) and the second plate body (20);

the locking structure (50) is rotatably arranged on the first adjusting block (31) and is provided with a locking position and an unlocking position, when the locking structure (50) is located at the unlocking position, the locking structure (50) avoids the adjusting column (40), and when the locking structure (50) is located at the locking position, the locking structure (50) is in butt fit with the adjusting column (40).

2. The intersomatic cage according to claim 1, characterized in that the locking structure (50) is provided with an escape recess (51) for escaping the adjustment column (40), the end of the escape recess (51) being in abutting engagement with the outer wall of the adjustment column (40) when the locking structure (50) is in the locked position.

3. The intersomatic cage according to claim 1, wherein the adjustment column (40) includes a threaded section (41) and a cap portion (42) provided at one end of the threaded section (41), the first adjustment block (31) is provided with a counter bore (311), the cap portion (42) is inserted into the counter bore (311) and cooperates with the locking structure (50), the second adjustment block (32) is provided with a threaded hole (321), and the threaded section (41) is inserted into the threaded hole (321).

4. The intersomatic cage according to any of claims 1 to 3,

a plurality of first anti-skidding convex teeth (11) are arranged on the upper surface of the first plate body (10), and each first anti-skidding convex tooth (11) extends along the width direction of the first plate body (10);

a plurality of second anti-skidding convex teeth (21) are arranged on the lower surface of the second plate body (20), and each second anti-skidding convex tooth (21) extends along the width direction of the second plate body (20).

5. An intersomatic cage according to claim 4,

a plurality of first anti-skidding concave parts (12) are arranged on each first anti-skidding convex tooth (11);

each second anti-skid convex tooth (21) is provided with a plurality of second anti-skid concave parts (22).

6. The intersomatic cage according to claim 2 or 3, characterized in that the second adjustment block (32) comprises a main body portion (322), a supporting end portion (323) and a connecting portion (324) connecting the main body portion (322) and the supporting end portion (323), the supporting end portion (323) being arranged at an end of the main body portion (322) remote from the first adjustment block (31);

a first sliding structure (60) is arranged between the main body part (322) and the first plate body (10), the first sliding structure (60) comprises a first slide way (61) and a first sliding block (62) arranged in the first slide way (61), one of the first slide way (61) and the first sliding block (62) is arranged on the main body part (322), the other one of the first slide way (61) and the first sliding block (62) is arranged on the first plate body (10), and a first included angle a is formed between the first sliding block (62) and the main body part (322) in the length direction;

a second sliding structure (70) is arranged between the main body part (322) and the second plate body (20), the second sliding structure (70) comprises a second slide way (71) and a second sliding block (72) arranged in the second slide way (71), one of the second slide way (71) and the second sliding block (72) is arranged on the main body part (322), the other one of the second slide way (71) and the second sliding block (72) is arranged on the second plate body (20), and a second included angle b is formed between the second sliding block (72) and the length direction of the main body part (322);

and a third included angle c is formed between the center lines of the first sliding block (62) and the second sliding block (72).

7. The intersomatic cage of claim 6,

a third sliding structure (81) is arranged between the first end of the first plate body (10) and the first adjusting block (31), the third sliding structure (81) comprises a third slide way (811) and a third slide block (812) arranged in the third slide way (811), one of the third slide way (811) and the third slide block (812) is arranged at the first end of the first plate body (10), the other one of the third slide way and the third slide block (812) is arranged on the first adjusting block (31), and a fourth included angle d is formed between the third slide block (812) and the length direction of the main body part (322);

a fourth sliding structure (82) is arranged between the second end of the first plate body (10) and the supporting end portion (323), the fourth sliding structure (82) comprises a fourth slide way (821) and a fourth sliding block (822) arranged in the fourth slide way (821), one of the fourth slide way (821) and the fourth sliding block (822) is arranged at the second end of the first plate body (10), the other one of the fourth slide way (821) and the fourth sliding block (822) is arranged on the supporting end portion (323), and a fifth included angle e is formed between the fourth sliding block (822) and the length direction of the main body portion (322).

8. The intersomatic cage of claim 7,

a fifth sliding structure (91) is arranged between the first end of the second plate body (20) and the first adjusting block (31), the fifth sliding structure (91) comprises a fifth slide way (911) and a fifth slide block (912) arranged in the fifth slide way (911), one of the fifth slide way (911) and the fifth slide block (912) is arranged at the first end of the second plate body (20), the other one of the fifth slide way (911) and the fifth slide block (912) is arranged on the first adjusting block (31), and a sixth included angle f is formed between the fifth slide block (912) and the main body part (322) in the length direction;

a sixth sliding structure (92) is arranged between the second end of the second plate body (20) and the supporting end portion (323), the sixth sliding structure (92) comprises a sixth slide way (921) and a sixth sliding block (922) arranged in the sixth slide way (921), one of the sixth slide way (921) and the sixth sliding block (922) is arranged at the second end of the second plate body (20), the other one of the sixth slide way (921) and the sixth sliding block (922) is arranged on the supporting end portion (323), and a seventh included angle g is formed between the sixth sliding block (922) and the main body portion (322) in the length direction.

9. An intersomatic cage according to claim 8,

the first included angle a, the second included angle b, the fourth included angle d, the fifth included angle e, the sixth included angle f and the seventh included angle g satisfy the following relationship: a = b = d = e = f = g; and/or

The third slideway (811), the fourth slideway (821), the fifth slideway (911) and the sixth slideway (921) are U-shaped grooves.

10. The intersomatic cage according to any of claims 1 to 3, characterized in that a first opening (13) is provided in an intermediate position of the first plate (10) and a second opening (23) is provided in an intermediate position of the second plate (20) and extends through the first plate (10).