CN115531055A

CN115531055A - Interbody fusion cage and method of use

Info

Publication number: CN115531055A
Application number: CN202211329184.7A
Authority: CN
Inventors: 张超; 李长青; 周跃; 郑文杰; 黄博; 刘明岩
Original assignee: Shanghai Sanyou Medical Co ltd
Current assignee: Shanghai Sanyou Medical Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2022-12-30
Also published as: CN114376772A

Abstract

The invention provides an intervertebral fusion cage and a using method thereof, comprising the following steps: the accommodating part can be opened, an opening is formed in the accommodating part, a drug adsorption layer is coated on the outer side face of the accommodating part, and the drug adsorption layer is made of medical gel; the medicine adsorbed by the medicine adsorption layer is a substance capable of adsorbing and promoting bone growth. The intervertebral fusion device of the invention has the advantages of minimally invasive implantation, good osseointegration capability, more thorough fusion, good immediate stability after operation, small wound, less bleeding, quick recovery after operation, and the like.

Description

Interbody fusion cage and method of use

The present case is the divisional application of the following patent applications:

application No.: 202011139958.0;

application date: year 2020, 10 months and 22 days;

the invention name is as follows: interbody fusion cage and method of use

Technical Field

The invention relates to the technical field of implantation instruments, in particular to an interbody fusion cage and a using method thereof.

Background

Among the common intervertebral fusion procedures, the intervertebral cage is the most commonly used device for current intervertebral fusion procedures. According to different operative approaches, a bullet head type fusion device is commonly used for the posterior approach; a kidney-shaped fusion cage is commonly used for the lateral and posterior approach; a wedge-shaped fusion cage for front entry and side front entry. The current fusion cage is made of polyether-ether-ketone which has poor osseointegration capability, and after the fusion cage is implanted into a body, the polyether-ether-ketone does not grow into the bone, so that the later fusion mainly depends on bone grafting. In addition, the minimally invasive surgery has the advantages of small incision, small soft tissue injury, less bleeding, quick postoperative rehabilitation and the like, and becomes the hot development direction of the current spinal surgery. How to relate to an intervertebral fusion device which has good bone combination capability and can be implanted in a minimally invasive way is a problem to be solved by the technical personnel in the field.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the technical problem underlying the present invention is to provide an intervertebral cage.

To achieve the above and other related objects, the present invention provides an intervertebral cage including: the container portion, the container portion can strut, be equipped with the opening on the container portion, the cladding has the medicine adsorbed layer on the lateral surface of container portion.

Preferably, the material of the drug adsorption layer is medical gel.

Further, the medicine adsorbed by the medicine adsorption layer is a medicine capable of adsorbing and promoting bone growth.

The invention also relates to an intervertebral cage comprising: the accommodating part can be opened, an opening is formed in the accommodating part, a medicine adsorption layer is coated on the outer side surface of the accommodating part, and the medicine adsorption layer is made of medical gel; the medicine adsorbed by the medicine adsorption layer is a medicine capable of adsorbing and promoting bone growth.

Preferably, the drug adsorbed by the drug adsorption layer is bone morphogenetic protein or stem cells.

Preferably, the receptacle is a pouch.

Preferably, the intervertebral fusion cage further comprises a connecting rod, one end of the connecting rod is connected with the opening, a middle through hole is arranged along the axial direction of the connecting rod, and the middle through hole is communicated with the opening.

Preferably, the intervertebral fusion device further comprises a support bracket, and the support bracket can be inserted into the accommodating part; the distraction bracket includes: a bracket main body and a support rod;

the bracket main body is of a strip-shaped structure, and the peripheral side surface of the bracket main body comprises a first slotting surface, a first supporting surface, a second slotting surface and a second supporting surface which are sequentially connected; the first slotting surface and the second slotting surface are oppositely arranged; the first supporting surface and the second supporting surface are arranged oppositely;

the front end of the bracket main body in the length direction is provided with an installation part, and the rear end of the bracket main body in the length direction is provided with a driving part;

the bracket main body is provided with a through hole, two ends of the through hole respectively penetrate through the front end of the mounting part and the rear end of the driving part, and the axial direction of the through hole is the same as the length direction of the bracket main body;

the supporting rod sequentially penetrates through the mounting part, the bracket main body and the driving part, the supporting rod is in clearance fit with the through hole, and the supporting rod is fixedly connected with the mounting part; the supporting rod is provided with a hollow channel which is communicated to the rear end of the supporting rod;

a middle long groove is arranged in the middle of the first grooving surface in the width direction, the middle long groove penetrates through the second grooving surface, and the length direction of the middle long groove is the same as the length direction of the first grooving surface;

a first auxiliary groove group and a second auxiliary groove group are respectively arranged on two sides of the middle long groove along the width direction of the first grooving surface; the first auxiliary groove group and the second auxiliary groove group have the same structure, the first auxiliary groove group comprises a front end auxiliary groove and a rear end auxiliary groove which are sequentially arranged along the length direction of the first grooved surface, a gap is formed between the front end auxiliary groove and the rear end auxiliary groove, and a connecting line, in which the midpoint of a connecting line between the rear end of the front end auxiliary groove and the front end of the rear end auxiliary groove is connected with the midpoint of the length of the middle elongated groove, is in the same direction as the width direction of the stent main body;

the first supporting surface is connected with the first supporting plate through a first connecting block; the second supporting surface is connected with the second supporting plate through a second connecting block;

the outer side wall of the support rod is provided with a side wall through hole, the side wall through hole is communicated with the hollow channel, the side wall through hole is positioned in a main cavity formed by the communication of the through hole and the middle strip groove, and the side wall through hole is closer to the front end of the support main body compared with the front end and the rear end of the support main body;

withstand the front end of bracing piece promotes the drive division is towards being close to the direction of installation department removes, the support main part extends to the hexagon structure.

Preferably, the interbody fusion cage further comprises a strutting part, wherein the strutting part is an elastic plate, the elastic plate is coiled and rotated to form a plurality of ring-layer structures which are sequentially encircled from inside to outside, and central axes of all the ring-layer structures are collinear.

The invention also relates to a using method of the interbody fusion cage, which is characterized in that the drug adsorption layer of the interbody fusion cage is soaked in the bone morphogenetic protein or stem cells, so that the drug adsorption layer adsorbs the bone morphogenetic protein or stem cells.

As described above, the intervertebral cage and the method for using the same according to the present invention have the following advantageous effects:

in the intervertebral fusion device, the accommodating part enters a human body when not being expanded, and the accommodating part is expanded again when the accommodating part reaches between vertebral bodies; the interbody fusion cage can be implanted in a minimally invasive surgery mode through the small channel; the outer side surface of the accommodating part is coated with a drug adsorption layer, and the drug adsorption layer is immersed in a bone growth promoting substance before operation, so that the drug adsorption layer can adsorb the bone growth promoting substance; after the accommodating part is expanded between the vertebral bodies, the medicine adsorption layer can be attached between the vertebral bodies, and substances on the medicine adsorption layer for promoting bone growth can improve the bone binding capacity; the interbody fusion cage has the advantages of capability of minimally invasive implantation, good osseointegration capability, more thorough fusion, good post-operation instant stability, small wound, less bleeding, quick post-operation recovery and the like.

Drawings

Fig. 1 is a schematic view showing the structure of an intervertebral cage of example 1 inserted between vertebral bodies.

Fig. 2 is a perspective view of the intervertebral cage of example 1.

Fig. 3 is a schematic view showing the internal structure of the intervertebral cage of example 1.

Fig. 4 is a schematic structural view showing the state in which the interior of the receiving part of the intervertebral cage according to example 2 is inserted into the expansion bracket.

Fig. 5 is a side perspective view of the distractor frame of the intervertebral cage of example 2 in an initial state.

Fig. 6 is a front side perspective view showing the expansion bracket of the intervertebral cage of example 2 in an initial state.

Fig. 7 is a rear perspective view of the distractor frame of the intervertebral cage of example 2 in an initial state.

Fig. 8 is a side view schematically showing the distractor frame of the intervertebral cage of example 2 in an initial state.

Fig. 9 isbase:Sub>A schematic view of the cross-sectional structurebase:Sub>A-base:Sub>A of fig. 8.

Fig. 10 is a side view schematically showing the configuration of the strut body of the strut stent of the intervertebral cage according to example 2 in an initial state.

Fig. 11 is a schematic view of the cross-sectional structure B-B of fig. 10.

Fig. 12 is a perspective view showing the support rods of the expanding frame of the intervertebral cage of example 2.

Fig. 13 is a perspective side view of the distractor frame of the intervertebral cage of example 2 in an expanded state.

Fig. 14 is a perspective view of the distracting part of the intervertebral cage of example 3 in a tightened state.

Fig. 15 is a perspective view of the distracting part of the intervertebral cage of example 3 in an expanded state.

Description of the reference numerals

10. Accommodating part

11. Opening of the container

20. Drug adsorption layer

30. Connecting rod

31. Middle through hole

100. Support main body

101. First grooved surface

102. First support surface

103. Second grooved surface

104. Second support surface

110. Mounting part

111. Front shrinking structure

120. Driving part

121. Clamping groove

130. Through hole

140. Middle long groove

150. First auxiliary groove set

151. Front end auxiliary groove

152. Rear auxiliary groove

153. Front recess structure of front groove part

154. Front groove rear recess structure

155. Front concave structure of rear groove part

156. Rear recess structure of rear groove part

160. Second auxiliary groove set

171. First connecting block

172. Second connecting block

181. First supporting plate

182. Second support plate

183. First inclined plane

184. Second inclined plane

200. Support rod

210. Hollow channel

220. Sidewall via

230. Inner connecting part

240. External connection part

300. Opening component

310. Ring layer structure

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to the attached drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Example 1

As shown in fig. 1 to 3, the intervertebral cage of the present embodiment includes: the containing part 10, the containing part 10 can be propped open, the containing part 10 is provided with an opening 11, the outer side surface of the containing part 10 is coated with a drug adsorption layer 20, and the drug adsorption layer 20 is made of medical gel.

In the intervertebral fusion cage of the invention, the containing part 10 enters the human body when not being expanded, and when the containing part 10 reaches between the vertebral bodies, the containing part 10 is expanded again; the interbody fusion cage can be implanted in a minimally invasive surgery mode through the small channel; the outer side surface of the accommodating part 10 is coated with a drug adsorption layer 20, the drug adsorption layer 20 is made of medical gel, and the drug adsorption layer 20 is immersed in a bone growth promoting substance before operation, so that the drug adsorption layer 20 can adsorb the bone growth promoting substance; after the accommodating part 10 is expanded between the vertebral bodies, the drug adsorption layer 20 can be attached between the vertebral bodies, and the substance on the drug adsorption layer 20 for promoting the bone growth can improve the bone binding capacity; the interbody fusion cage has the advantages of capability of minimally invasive implantation, good osseointegration capability, more thorough fusion, good post-operation instant stability, small wound, less bleeding, quick post-operation recovery and the like. The intervertebral fusion device can be applied to intervertebral disc mirror operation. The material of the medical gel in this embodiment is sodium hyaluronate. The drug adsorbed by the drug adsorption layer 20 is a substance capable of adsorbing and promoting bone growth. In this embodiment, the substance capable of adsorbing and promoting bone growth in the drug adsorption layer 20 is bone morphogenetic protein or stem cells.

The receptacle 10 is a pouch. The opening 11 of the bag is used for introducing physiological saline or inflating gas into the bag to open the bag.

The method for using the intervertebral fusion device comprises the following steps:

1) Soaking the drug adsorption layer 20 of the interbody fusion cage in bone morphogenetic protein or stem cells so that the drug adsorption layer 20 adsorbs the bone morphogenetic protein or stem cells;

2) When the accommodating part 10 reaches the position between the vertebral bodies, normal saline or air is introduced into the capsular bag, so that the capsular bag is opened.

Example 2

As shown in fig. 4 to 13, in the present embodiment, the intervertebral fusion cage further includes a connecting rod 30, one end of the connecting rod 30 is connected to the opening 11, a middle through hole 31 is formed along an axial direction of the connecting rod 30, and the middle through hole 31 is communicated with the opening 11. The arrangement of the connecting rod 30 makes the structure of the intervertebral fusion device more stable and easier to operate.

The intervertebral fusion cage also comprises a distraction bracket which can be inserted into the accommodating part 10; the expansion bracket can be inserted into the accommodating part 10; the distraction support includes: the support comprises a support body 100 and a support rod 200, wherein the support body 100 and the support rod 200 are both made of titanium; the stent main body 100 is of a strip-shaped structure, and the peripheral side surface of the stent main body 100 comprises a first slotting surface 101, a first supporting surface 102, a second slotting surface 103 and a second supporting surface 104 which are sequentially connected; the first grooving surface 101 and the second grooving surface 103 are arranged oppositely; the first supporting surface 102 is arranged opposite to the second supporting surface 104;

the bracket main body 100 is provided with a mounting part 110 at the front end in the length direction, and the bracket main body 100 is provided with a driving part 120 at the rear end in the length direction;

the holder main body 100 is provided with a through hole 130, both ends of the through hole 130 respectively penetrate to the front end of the mounting part 110 and the rear end of the driving part 120, and the axial direction of the through hole 130 is the same as the length direction of the holder main body 100;

the support rod 200 sequentially passes through the mounting part 110, the bracket body 100 and the driving part 120, the support rod 200 is in clearance fit with the through hole 130, and the support rod 200 is fixedly connected with the mounting part 110; the support rod 200 has a hollow channel 210, and the hollow channel 210 penetrates to the rear end of the support rod 200; the axial direction of the hollow channel 210 is the same as the axial direction of the support rod 200;

a middle long groove 140 is formed in the middle of the first grooving surface 101 in the width direction, the middle long groove 140 penetrates through the second grooving surface 103, and the length direction of the middle long groove 140 is the same as the length direction of the first grooving surface 101;

a first auxiliary groove group 150 and a second auxiliary groove group 160 are respectively arranged on two sides of the middle long groove 140 along the width direction of the first grooving surface 101; the first auxiliary groove group 150 and the second auxiliary groove group 160 have the same structure, the first auxiliary groove group 150 includes a front auxiliary groove 151 and a rear auxiliary groove 152 sequentially arranged along the length direction on the first grooved surface 101, a space is provided between the front auxiliary groove 151 and the rear auxiliary groove 152, a connection line connecting a midpoint of a connection line between the rear end of the front auxiliary groove 151 and the front end of the rear auxiliary groove 152 with a midpoint of the length of the middle elongated groove 140 is a middle connection line, and the middle connection line is in the same direction as the width W2 direction of the stent body 100;

the first supporting surface 102 is connected with the first supporting plate 181 through the first connecting block 171; the second supporting surface 104 is connected with the second supporting plate 182 through the second connecting block 172;

the outer side wall of the support rod 200 has a side wall through hole 220, the side wall through hole 220 is communicated with the hollow channel 210, the side wall through hole 220 is located in a main chamber formed by the through hole 130 and the middle strip groove 140, and the side wall through hole 220 is closer to the front end of the bracket body 100 compared with the front end and the rear end of the bracket body 100;

the driving part 120 is pushed to move toward the direction close to the mounting part 110 against the front end of the supporting rod 200, and the stand body 100 is extended to have a hexagonal structure.

When the distraction bracket of the present embodiment is used, the non-distracted distraction bracket is disposed in the non-distracted accommodation portion 10, and when the accommodation portion 10 needs to be distracted, the front end of the support rod 200 is pressed, the driving portion 120 is pushed to move toward the direction close to the mounting portion 110, and the bracket main body 100 is extended to have a hexagonal structure. The distraction bracket of the embodiment is made of titanium materials, and the use of the titanium materials can ensure enough strength to maintain the normal shape of the vertebral body. The strutting bracket is used for strutting the accommodating part.

The first grooving surface 101, the first supporting surface 102, the second grooving surface 103 and the second supporting surface 104 are all planes; the first grooving surface 101 and the second grooving surface 103 are arranged oppositely and parallelly; the first supporting surface 102 and the second supporting surface 104 are arranged oppositely and in parallel; the first supporting surface 102 is parallel to the outer side surface of the first supporting plate 181, and the second supporting surface 104 is parallel to the outer side surface of the second supporting plate 182.

Since the first auxiliary groove group 150 and the second auxiliary groove group 160 are respectively disposed at both sides of the middle elongated groove 140; the first auxiliary groove group 150 and the second auxiliary groove group 160 have the same structure, and the first auxiliary groove group 150 includes a front auxiliary groove 151 and a rear auxiliary groove 152 sequentially arranged along the length direction of the first grooved surface 101, which facilitates the expansion of the stent body 100.

The first supporting surface 102 is connected with the first supporting plate 181 through the first connecting block 171; the second supporting surface 104 is connected to the second supporting plate 182 through the second connecting block 172, and the structure is such that the first supporting surface 102 is not in contact with the first supporting plate 181, and the second supporting surface 104 is not in contact with the second supporting plate 182, so that the first supporting plate 181 and the second supporting plate 182 can stably support the stent body 100 when it is expanded.

Since the front auxiliary groove 151 and the rear auxiliary groove 152 have a space therebetween, a line connecting a midpoint of a line between the rear end of the front auxiliary groove 151 and the front end of the rear auxiliary groove 152 to a midpoint of the length of the middle elongated groove 140 is in the same direction as the width W2 of the holder body 100. This configuration facilitates the expansion of the stent body 100 into a hexagonal configuration.

A plane passing through a midpoint of a line connecting the rear ends of the front end auxiliary grooves 151 and the front ends of the rear end auxiliary grooves 152 and perpendicular to the length direction of the stand main body 100 is a vertical middle plane of the stand main body 100, distances between both ends of the first connection block 171 in the length direction and the vertical middle plane are equal, and distances between both ends of the second connection block 172 in the length direction and the vertical middle plane are equal. The position of the middle in the length direction of the interval between the front end auxiliary groove 151 and the rear end auxiliary groove 152 corresponds to the position of the middle in the length direction of the first connection block 171; the position of the middle in the length direction of the interval between the front end auxiliary groove 151 and the rear end auxiliary groove 152 corresponds to the position of the middle in the length direction of the second connecting block 172; since the first connection block 171 enhances the strength of the space between the front end auxiliary groove 151 and the rear end auxiliary groove 152 of the first auxiliary groove group 150, it is advantageous for the space between the front end auxiliary groove 151 and the rear end auxiliary groove 152 of the first auxiliary groove group 150 to be able to serve as one side of the hexagonal structure during the extension of the stent main body 100 into the hexagonal structure; since the second connecting block 172 reinforces the strength of the interval between the front auxiliary groove 151 and the rear auxiliary groove 152 of the second auxiliary groove group 160, it is advantageous that the interval between the front auxiliary groove 151 and the rear auxiliary groove 152 of the second auxiliary groove group 160 can serve as one of the sides of the hexagonal structure during the stent body 100 is expanded into the hexagonal structure.

Both ends of the first support plate 181 in the length direction are equidistant from the vertical middle plane, and both ends of the second support plate 182 in the length direction are equidistant from the vertical middle plane. This structure allows the first and

second support plates

181 and 182 to receive a stable supporting force.

The first support plate 181 and the second support plate 182 have the same width, and the width W2 of the bracket body 100 is equal to or less than the width of the first support plate 181. In this embodiment, the width W2 of the stent body 100 is equal to the width of the first support plate 181. This structure allows the first support plate 181 and the second support plate 182 to have a better supporting force.

The outer side surface of the first support plate 181 is parallel to the outer side surface of the second support plate 182; the distance between the outer side surface of the first support plate 181 and the outer side surface of the second support plate 182 is shown in H of fig. 8.

The front part of the mounting part 110 is a front shrinkage structure 111 shrinking forwards, and the front end of the front shrinkage structure 111 is an arc-shaped end surface. This structure allows the front of the mounting portion 110 to be formed in the shape of a bullet head for insertion mounting.

The outer side surface of the front shrinkage structure 111 is provided with two front shrinkage inclined surfaces 1111 which are oppositely arranged; the front part of the outer side surface of the first support plate 181 is a first inclined surface 183 inclined toward the bracket main body 100, and the front part of the outer side surface of the second support plate 182 is a second inclined surface 184 inclined toward the bracket main body 100; the first ramp 183 is coplanar with one of the foreshortening ramps 1111 and the second ramp 184 is coplanar with the other foreshortening ramp 1111 to facilitate insertion into the pouch.

The hollow passage 210 of the support pole 200 is provided at the front end thereof with an inner connection part 230 to which a front positioning tool is connected. The front positioning means fixes the position of the front end of the support pole 200 by being connected to the inner connection part 230, i.e., the front positioning means abuts against the front end of the support pole 200.

In this embodiment, the inner connection portion 230 is an internal thread. The front positioning means is a medical positioning means having an external thread corresponding to the internal thread of the inner connection part 230.

The driving portion 120 is provided with a card slot 121. The engaging groove 121 is used for a medical tool for pushing the driving portion 120 to be engaged, so as to push the driving portion 120.

In this embodiment, the driving part 120 is cylindrical. This structure enables the driving part 120 to be stably pushed.

The first support plate 181 and the second support plate 182 have the same structure, and the width W1 of the first support plate 181 can provide a large support surface to stably support a vertebral body.

A front groove part front recess structure 153 is provided at a front part of a groove wall of each front end auxiliary groove 151, and a front groove part rear recess structure 154 is provided at a rear part of a groove wall of each front end auxiliary groove 151; the front portion of the groove wall of each rear-end auxiliary groove 152 is provided with a rear-groove front recessed structure 155, and the rear portion of the groove wall of each rear-end auxiliary groove 152 is provided with a rear-groove rear recessed structure 156.

The front-groove front recess structure 153 includes two first front recesses oppositely disposed at the front portion of the groove wall of the front-end auxiliary groove 151, and the front-groove rear recess structure 154 includes two first rear recesses oppositely disposed at the rear portion of the groove wall of the front-end auxiliary groove 151; the rear-groove front recess structure 155 includes two second front recesses oppositely provided at the front portions of the groove walls of the rear-end auxiliary groove 152; rear groove portion rear recess structure 156 includes two second rear recess portions oppositely disposed at the rear of the groove wall of rear end auxiliary groove 152.

1) Soaking the drug adsorption layer 20 of the interbody fusion cage in bone morphogenetic protein or stem cells, so that the drug adsorption layer 20 adsorbs the bone morphogenetic protein or stem cells;

2) When the accommodating part 10 reaches between the vertebral bodies, the front end of the support rod 200 is pushed against, the driving part 120 is pushed to move towards the direction close to the mounting part 110, and the stent main body 100 is expanded to a hexagonal structure, so that the accommodating part 10 is expanded.

Example 3

As shown in fig. 3 and 14 to 15, in this embodiment, the intervertebral fusion cage further includes a distraction component 300, the distraction component 300 is an elastic plate, the elastic plate is coiled to form a plurality of ring-shaped structures 310 that sequentially surround from inside to outside, and central axes of all the ring-shaped structures 310 are collinear. Initially, the distraction member 300 is in a tightened state; when the expanding member 300 is required to expand the accommodating portion 10, the expanding member 300 is driven so that the expanding member 300 is in the expanded state, and the expanding member 300 is expanded into a single encircling layer.

The method for using the interbody fusion cage comprises the following steps:

2) After the accommodating part 10 reaches between the vertebral bodies, the distraction component 300 is driven, so that the distraction component 300 is unfolded, the distraction component 300 is unfolded into a single encircling ring layer, and the distraction component 300 distracts the accommodating part 10.

In conclusion, the present invention effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. An intervertebral cage, comprising: the drug storage device comprises a containing part (10), wherein the containing part (10) can be opened, an opening (11) is formed in the containing part (10), and a drug adsorption layer (20) is coated on the outer side surface of the containing part (10); when the accommodating part (10) is a bag, normal saline or gas is introduced into the bag through an opening (11) of the bag to expand the bag;

when the intervertebral cage further comprises a distraction bracket, said distraction bracket can be inserted in said housing (10);

when the intervertebral fusion cage further comprises a strutting part (300), wherein the strutting part (300) is an elastic plate, the elastic plate is coiled and turned to form a plurality of ring-layer structures (310) which are sequentially encircled from inside to outside, the central axes of all the ring-layer structures (310) are collinear, and the strutting part (300) is in a tightened state when the strutting part (300) is started; when the expansion component (300) is required to expand the accommodating part (10), the expansion component (300) is driven to be in an expanded state, and then the expansion component (300) is expanded into a single encircling ring layer.

2. An intersomatic cage according to claim 1, wherein: the drug adsorption layer (20) is made of medical gel.

3. An intersomatic cage according to claim 3, characterized in that: the medicine adsorbed by the medicine adsorption layer (20) is a substance capable of adsorbing and promoting bone growth.

4. An intervertebral cage, comprising: the accommodating part (10) can be opened, an opening (11) is formed in the accommodating part (10), a drug adsorption layer (20) is coated on the outer side face of the accommodating part (10), and the drug adsorption layer (20) is made of medical gel; the medicine adsorbed by the medicine adsorption layer (20) is a substance capable of adsorbing and promoting bone growth;

when the accommodating part (10) is a bag, normal saline or gas is introduced into the bag through an opening (11) of the bag to expand the bag;

when the intervertebral fusion cage further comprises a propping component (300), wherein the propping component (300) is an elastic plate, the elastic plate is coiled and revolved to form a plurality of ring layer structures (310) which are sequentially encircled from inside to outside, the central axes of all the ring layer structures (310) are collinear, and when the propping component (300) is started, the propping component (300) is in a tightened state; when the expansion component (300) is required to expand the accommodating part (10), the expansion component (300) is driven to enable the expansion component (300) to be in an expanded state, and then the expansion component (300) is expanded into a single encircling ring layer.

5. The intersomatic cage according to any of claims 1 to 4, characterized in that: the medicine adsorbed by the medicine adsorption layer (20) is bone morphogenetic protein or stem cells.

6. The intersomatic cage according to claim 1 or 4, characterized in that: still include connecting rod (30), the one end of connecting rod (30) with opening (11) are connected, along the axial of connecting rod (30) is equipped with middle through-hole (31), middle through-hole (31) with opening (11) intercommunication.

7. The intersomatic cage according to claim 1 or 4, characterized in that: the distraction bracket includes: a bracket main body (100) and a support rod (200);

the bracket main body (100) is of a long strip-shaped structure, and the peripheral side surface of the bracket main body (100) comprises a first slotting surface (101), a first supporting surface (102), a second slotting surface (103) and a second supporting surface (104) which are sequentially connected; the first grooving surface (101) and the second grooving surface (103) are arranged oppositely; the first supporting surface (102) is arranged opposite to the second supporting surface (104);

the front end of the bracket main body (100) in the length direction is provided with an installation part (110), and the rear end of the bracket main body (100) in the length direction is provided with a driving part (120);

a through hole (130) is formed in the bracket main body (100), two ends of the through hole (130) respectively penetrate through the front end of the mounting part (110) and the rear end of the driving part (120), and the axial direction of the through hole (130) is the same as the length direction of the bracket main body (100);

the supporting rod (200) sequentially penetrates through the mounting part (110), the bracket main body (100) and the driving part (120), the supporting rod (200) is in clearance fit with the through hole (130), and the supporting rod (200) is fixedly connected with the mounting part (110); the supporting rod (200) is provided with a hollow channel (210), and the hollow channel (210) penetrates through the rear end of the supporting rod (200);

a middle long groove (140) is arranged in the middle of the first grooving surface (101) in the width direction, the middle long groove (140) penetrates through the second grooving surface (103), and the length direction of the middle long groove (140) is the same as the length direction of the first grooving surface (101);

a first auxiliary groove group (150) and a second auxiliary groove group (160) are respectively arranged on two sides of the middle long groove (140) along the width direction of the first grooving surface (101); the first auxiliary groove group (150) and the second auxiliary groove group (160) have the same structure, the first auxiliary groove group (150) comprises a front auxiliary groove (151) and a rear auxiliary groove (152) which are sequentially arranged along the length direction of the first grooved surface (101), a gap is formed between the front auxiliary groove (151) and the rear auxiliary groove (152), and a connecting line, in which the midpoint of a connecting line between the rear end of the front auxiliary groove (151) and the front end of the rear auxiliary groove (152) is connected with the midpoint of the length of the middle long groove (140), is in the same direction as the width direction of the stent main body (100);

the first supporting surface (102) is connected with a first supporting plate (181) through a first connecting block (171); the second supporting surface (104) is connected with a second supporting plate (182) through a second connecting block (172);

the outer side wall of the support rod (200) is provided with a side wall through hole (220), the side wall through hole (220) is communicated with the hollow channel (210), the side wall through hole (220) is positioned in a main cavity formed by the communication of the through hole (130) and the middle long groove (140), and the side wall through hole (220) is closer to the front end of the bracket main body (100) compared with the front end and the rear end of the bracket main body (100);

the front end of the supporting rod (200) is propped against, the driving part (120) is pushed to move towards the direction close to the mounting part (110), and the support main body (100) is extended to be of a hexagonal structure.

8. A method of using an intervertebral cage, comprising: immersing the drug-adsorbing layer (20) of the intersomatic cage according to claim 1 or 4 in bone morphogenetic proteins or stem cells so that the drug-adsorbing layer (20) adsorbs the bone morphogenetic proteins or stem cells.