CN116115394B

CN116115394B - Rotatable elastic artificial vertebral body

Info

Publication number: CN116115394B
Application number: CN202310233314.5A
Authority: CN
Inventors: 汪清; 张秦璥; 田美萍; 陈越
Original assignee: Shanhai Spanwei Biotechnology Co ltd
Current assignee: Shanhai Spanwei Biotechnology Co ltd
Priority date: 2023-03-09
Filing date: 2023-03-09
Publication date: 2023-10-31
Anticipated expiration: 2043-03-09
Also published as: CN116115394A

Abstract

The application relates to a rotatable elastic artificial vertebral body, and relates to the technical field of vertebral reconstruction. The titanium cage is positioned between the two connecting vertebral bodies, a connecting assembly is arranged between the two connecting vertebral bodies and the titanium cage, and a compression assembly is arranged on the connecting assembly; the compression assembly comprises a cover part, a buffer part and a pair of telescopic parts, wherein the cover part is arranged on the connecting assembly, the telescopic parts are arranged in the cover part, one end of each telescopic part is connected with the connecting assembly, the other end of each telescopic part is connected with the buffer part, and the buffer parts are arranged in the cover part. The application has the advantages that the titanium cage and the connecting vertebral body have certain activity and also have buffering effect.

Description

Rotatable elastic artificial vertebral body

Technical Field

The application relates to the field of vertebral body reconstruction, in particular to a rotatable elastic artificial vertebral body.

Background

In clinical practice, when the posterior longitudinal ligament ossification or the pathological change of the vertebral body behind the spinal cord is carried out, the anterior vertebral body secondary total excision and discectomy are needed to be frequently used, and an interbody fusion operation and a steel plate internal fixation operation are added, so that a patient receiving the interbody fusion operation and the steel plate internal fixation operation loses most of the activity due to the fusion of the vertebral bodies, the movement and the load of adjacent segments are increased, and the degeneration of the adjacent segments is accelerated to a certain extent; and the distance between adjacent vertebral bodies cannot be changed, so that the artificial intervertebral disc cannot realize the buffer function of the real intervertebral disc when the vertebral column is pressed, and the adjacent vertebral bodies of the artificial intervertebral disc are easily damaged.

Disclosure of Invention

In order to solve the problems that the existing artificial intervertebral disc prosthesis is poor in mobility and cannot realize the buffer function of a real intervertebral disc and is easy to damage adjacent vertebral bodies of the artificial intervertebral disc, the application provides a rotatable elastic artificial vertebral body.

The rotatable elastic artificial vertebral body provided by the application adopts the following technical scheme:

the rotatable elastic artificial vertebral body comprises a titanium cage and a pair of connecting vertebral bodies, wherein the titanium cage is positioned between the two connecting vertebral bodies, a connecting assembly is arranged between the two connecting vertebral bodies and the titanium cage, and a compression assembly is arranged on the connecting assembly;

the compression assembly comprises a cover part, a buffer part and a pair of telescopic parts, wherein the cover part is arranged on the connection assembly, the telescopic parts are arranged in the cover part, one end of each telescopic part is connected with the connection assembly, the other end of each telescopic part is connected with the buffer part, and the buffer parts are arranged in the cover part.

By adopting the technical scheme, the connecting vertebral body and the titanium cage are connected through the connecting component, so that the connecting vertebral body and the titanium cage are not easy to influence the movement; when the spine is pressed, the telescopic part is extruded to shrink on the buffer part, namely the interval between the titanium cage and the connecting vertebral body is changed, so that the structure that the interval between the titanium cage and the connecting vertebral body cannot be changed due to the fixation of the steel plate is replaced; and the telescopic part is compressed in-process, and buffer part will also cushion the oppression power to be difficult for causing the damage to titanium cage and connected centrum.

Optionally, coupling assembling includes fixed steel sheet, arc arch, connects steel sheet and connects the hemisphere, fixed steel sheet with titanium cage is fixed just offer the arc wall on the fixed steel sheet, the arc arch with the arc wall cooperatees, connect the steel sheet with connect the centrum fixed just connect and offered the hemisphere groove on the steel sheet, connect the hemisphere with the hemisphere groove cooperatees, shroud portion connect in between the arc arch with connect the hemisphere, one of them the telescoping portion with connect the hemisphere connection, another the telescoping portion with the arc is protruding to be connected.

Through adopting above-mentioned technical scheme, cooperate with the hemisphere groove and arc protruding and arc groove through connecting the hemisphere, can make titanium cage and connect the centrum between have certain mobility.

Optionally, the cover portion includes a pouch, the pouch is fixedly embedded between the arc-shaped protrusion and the connection hemisphere, and the expansion portion and the buffer portion are both disposed in the pouch.

Through adopting above-mentioned technical scheme, the bag can wrap up telescopic portion and buffer to make telescopic portion and buffer be difficult for directly exposing outside.

Optionally, the buffer part includes buffer tube, connecting pipe and the extension pipe that all is equipped with normal saline, the telescopic part with the buffer tube is connected, connecting pipe one end with buffer tube intercommunication, the other end with the extension pipe intercommunication.

By adopting the technical scheme, when the telescopic part is contracted in the buffer tube due to extrusion, the physiological saline in the buffer tube is continuously extruded into the extension tube through the connecting tube, so that the effect of buffering the pressing force is achieved; and after the telescopic part is restored to the initial position, normal saline automatically flows back into the buffer tube, so that the compression force can be buffered continuously. The mode can replace the mode that only sets up softer protection pad between connection hemisphere and arc protruding, and this mode is difficult for losing the effect of buffering to the oppression power because of the increase of age.

Optionally, the telescopic part includes telescopic link, sliding plate and seal cover, one of them telescopic link one end with connect hemisphere fixed, the other end insert establish to in the buffer tube, another telescopic link one end with arc protruding fixed, the other end insert establish to in the buffer tube, the sliding plate insert establish to in the buffer tube and with the telescopic link is connected, the fixed cover of seal cover is located on the perisporium of sliding plate and with the inner wall of buffer tube offsets tightly.

Through adopting above-mentioned technical scheme, when backbone receives the oppression, the telescopic link contracts in the buffer tube because of the extrusion, and two sliding plates in the single buffer tube are constantly close to promptly, and normal saline in the buffer tube will be pressed into the extension intraductal through the connecting pipe constantly this moment to reach the effect of buffering to the oppression power.

Optionally, the bag includes outer bag and inner bag, the outer bag is fixed in connect the hemisphere with between the arc arch, just the outer bag with be provided with the protection pad between the inner bag, the inner bag intussuseption is filled with the sponge.

By adopting the technical scheme, through the double arrangement of the outer bag and the inner bag, even if the outer bag is damaged, the telescopic part and the buffer part can be still wrapped through the arrangement of the inner bag; the protective pad can enhance the effect of buffering the compression force, so that the titanium cage and the connecting vertebral body are not easily damaged; when the backbone is oppressed, the sponge will also be compressed to cushion the oppression power, thereby further strengthen the effect of buffering the oppression power, and then further be difficult for causing the damage to titanium cage and connected centrum.

Optionally, a phase punching component is arranged in the extension pipe.

By adopting the technical scheme, after the physiological saline is pressed into the extension pipe, the liquid level in the extension pipe rises; in the process of rising the liquid level, the phase punching assembly forms certain obstruction, so that the compression force is consumed to a certain extent, and the effect of buffering the compression force is further optimized.

Optionally, the subassembly is towards mutually including gag lever post, limiting plate, looks towards board, silica gel cover and looks towards the spring, the one end of gag lever post with the inner wall of extension pipe is fixed, the other end with the limiting plate is fixed, looks towards the board cover and locate on the gag lever post and with the limiting plate looks butt, the silica gel cover is located on the gag lever post with on the perisporium of looks towards the board, just the silica gel cover on the looks towards the board with the inner wall looks towards tightly, the extension pipe is kept away from the one end of connecting pipe is run through and is seted up the bleeder vent, looks towards the spring connect in looks towards the board with between the inner wall of extension pipe.

Through adopting above-mentioned technical scheme, at the liquid level in the extension pipe in-process that rises, normal saline will carry out the jacking to the looks dash board, and the in-process of jacking, need overcome the gravity of looks dash board, the thrust of looks dash board and the frictional force between looks dash board and gag lever post and looks dash board and the extension pipe inner wall of looks dash board, thereby formed certain hindrance, with carry out the consumption to a certain extent to the oppression power, thereby further optimized the effect of buffering to the oppression power.

Optionally, the telescopic link includes interior pole and outer pole, arbitrary interior pole with connect the hemisphere fixed, another interior pole with arc protruding fixed, the one end of outer pole is seted up the flexible hole, the other end with the sliding plate is fixed, interior pole slip in the flexible hole, just outer pole with fix through the mounting between the interior pole.

Through adopting above-mentioned technical scheme, in practical application, can be according to titanium cage and connect the required interval between the centrum to the length that the interior pole stretched into in the telescopic hole is adjusted, and after adjusting, accessible mounting is fixed outer pole and interior pole, so that interior pole is difficult for carrying out the slip in the telescopic hole.

Optionally, the fixing member includes a titanium pin, and the titanium pin is fixed between the inner rod and the outer rod.

By adopting the technical scheme, after the inner rod is adjusted, the titanium nails can be nailed between the outer rod and the inner rod so as to fix the inner rod and the outer rod.

In summary, the present application includes at least one of the following beneficial effects:

1. when the spine is pressed, the telescopic part is extruded to shrink on the buffer part, namely the interval between the titanium cage and the connecting vertebral body is changed, so that the structure that the interval between the titanium cage and the connecting vertebral body cannot be changed due to the fixation of the steel plate is replaced; and the telescopic part is compressed in-process, and buffer part will also cushion the oppression power to be difficult for causing the damage to titanium cage and connected centrum.

2. Through the dual setting of outer bag and inner bag, even after the outer bag takes place to damage, through the setting of inner bag, still can wrap up telescopic portion and buffering portion.

3. After the normal saline is pressed into the extension tube, the liquid level in the extension tube rises; in the process of rising the liquid level, the phase punching assembly forms certain obstruction, so that the compression force is consumed to a certain extent, and the effect of buffering the compression force is further optimized.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present application;

FIG. 2 is a schematic diagram of a compression assembly embodying an embodiment of the present application;

fig. 3 is an enlarged view at a in fig. 2.

In the figure: 111. a titanium cage; 2. connecting the vertebral bodies; 3. a connection assembly; 31. fixing the steel plate; 311. an arc-shaped groove; 32. arc-shaped bulges; 33. connecting steel plates; 331. hemispherical grooves; 34. connecting hemispheres; 4. a cover portion; 41. a pouch; 411. an inner bag; 412. an outer bag; 42. a protective pad; 43. a sponge; 5. a buffer section; 51. a buffer tube; 52. a connecting pipe; 53. an extension tube; 531. ventilation holes; 6. a telescopic part; 61. a telescopic rod; 611. an inner rod; 612. an outer rod; 6121. a telescopic hole; 62. a sliding plate; 63. sealing sleeve; 7. a phase punching assembly; 71. a limit rod; 72. a limiting plate; 73. a phase punching plate; 74. a silica gel sleeve; 75. a phase spring; 8. a fixing member; 81. titanium nails.

Detailed Description

The application is described in further detail below with reference to fig. 1-3.

The embodiment of the application discloses a rotatable elastic artificial vertebral body. Referring to fig. 1, a rotatable elastic artificial vertebral body includes a titanium cage 1 and a pair of connecting vertebral bodies 2, a titanium cage 111 is located between the two connecting vertebral bodies 2 and the titanium cage 111 is filled with bone fusion filler.

Referring to fig. 1, a connecting assembly 3 is arranged between two connecting vertebral bodies 2 and a titanium cage 1, so that the connecting vertebral bodies 2 and the titanium cage 1 are fixed, and a certain degree of activity is provided between the connecting vertebral bodies 2 and the titanium cage 1 through the connection of the connecting assembly 3, so that the activity of the connecting vertebral bodies 2 and the titanium cage 1 is not easily affected; and the two connecting vertebral bodies 2 are respectively connected with the top and the bottom of the titanium cage 1.

Referring to fig. 2 and 3, a compression assembly is disposed on the connection assembly 3, the compression assembly includes a cover portion 4, a buffer portion 5 and a pair of telescopic portions 6, in this embodiment, the buffer portion 5 and the telescopic portions 6 are disposed in two groups, the cover portion 4 is fixed on the connection assembly 3, the telescopic portions 6 and the buffer portion 5 are disposed in the cover portion 4, one end of the telescopic portion 6 is connected with the buffer portion 5, the other end is connected with the connection assembly 3, and the cover portion 4 can wrap the telescopic portions 6 and the buffer portion 5, so that the telescopic portions 6 and the buffer portion 5 are not exposed directly, and normal operation of a human body is not affected easily.

When the spine is pressed, the telescopic part 6 is extruded to shrink on the buffer part 5, namely the interval between the titanium cage 1 and the connecting vertebral body 2 is changed, thereby replacing the structure that the interval between the titanium cage 1 and the connecting vertebral body 2 can not be changed due to the fixation of the steel plate; and the expansion part 6 is compressed, and the buffer part 5 also buffers the compression force, so that the titanium cage 1 and the connecting vertebral body 2 are not easy to damage.

Referring to fig. 1 and 2, the connection assembly 3 includes a fixed steel plate 31, an arc-shaped protrusion 32, a connection steel plate 33 and a connection hemisphere 34, the fixed steel plate 31 is fixed to the top of the titanium cage 1, and an arc-shaped groove 311 is formed in one side of the fixed steel plate 31 away from the titanium cage 1, the arc-shaped protrusion 32 is matched with the arc-shaped groove 311. The connecting steel plate 33 is fixed with the bottom of the titanium cage 1, a hemispherical groove 331 is formed in one side, far away from the titanium cage 1, of the connecting steel plate 33, and the connecting hemisphere 34 is matched with the hemispherical groove 331.

The cover portion 4 is embedded between the arc-shaped protrusion 32 and the connecting hemisphere 34, one end of any one telescopic portion 6 of the group, which is far away from the buffer portion 5, is connected with the connecting hemisphere 34, and one end of the other telescopic portion 6, which is far away from the buffer portion 5, is connected with the arc-shaped protrusion 32. By matching the connecting hemisphere 34 with the hemispherical groove 331 and matching the arc-shaped protrusion 32 with the arc-shaped groove 311, a certain degree of activity can be achieved between the titanium cage 1 and the connecting vertebral body 2.

Referring to fig. 3, the cover portion 4 includes a pouch 41, the pouch 41 is embedded and fixed between the arc-shaped protrusion 32 and the connecting hemisphere 34, the expansion portion 6 and the buffer portion 5 are both disposed in the pouch 41, in the embodiment of the present application, the pouch 41 may be made of a material that can be implanted into a human body and does not affect the human body, and the pouch 41 may wrap the expansion portion 6 and the buffer portion 5, so that the expansion portion 6 and the buffer portion 5 are not easily exposed directly.

Referring to fig. 3, in detail, the pouch 41 includes an outer bag 412 and an inner bag 411, the outer bag 412 is fixed between the coupling hemisphere 34 and the arc protrusion 32, and the extension part 6 and the buffer part 5 can be wrapped by the double arrangement of the outer bag 412 and the inner bag 411 even though the outer bag 412 is damaged by the arrangement of the inner bag 411. The protective pad 42 is filled between the outer bag 412 and the inner bag 411, the protective pad 42 is made of rubber material or silica gel material, and the protective pad 42 can enhance the effect of buffering the compression force, so that the titanium cage 1 and the connecting vertebral body 2 are not easily damaged; the inner bag 411 is filled with the sponge 43, and when the spine is pressed, the sponge 43 is compressed to buffer the pressing force, so that the effect of buffering the pressing force is further enhanced, and the titanium cage 1 and the connecting vertebral body 2 are not easily damaged.

Referring to fig. 3, the buffer portion 5 includes a buffer tube 51, a connection tube 52, and an extension tube 53, each of which is filled with physiological saline, both ends of the buffer tube 51 are closed, and one end of the expansion portion 6 adjacent to the buffer tube 51 is connected to the buffer tube 51. One end of the connecting pipe 52 is communicated with the buffer pipe 51, the connecting pipe 52 is mutually perpendicular to the buffer pipe 51, the other end of the connecting pipe 52 is integrally formed with the extending pipe 53 and communicated with the extending pipe 53, one end of the extending pipe 53, far away from the connecting pipe 52, is closed, the liquid level in the buffer pipe 51 is level with the liquid level in the extending pipe 53, and the extending pipe 53 is incompletely filled with physiological saline. When the expansion and contraction part 6 is contracted in the buffer tube 51 by extrusion, the normal saline in the buffer tube 51 is continuously extruded into the extension tube 53 through the connecting tube 52, thereby achieving the effect of buffering the compression force; after the expansion and contraction part 6 is restored to the initial position, the normal saline automatically flows back into the buffer tube 51, so that the pressing force can be buffered continuously. This approach can replace the approach of providing a softer pad only between the connecting hemisphere 34 and the arcuate projection 32, which is less prone to losing the effect of cushioning the compression force due to the increase in age.

Referring to fig. 3, specifically, the extension pipe 53 is provided with the phase flushing assembly 7, and after the physiological saline is pressed into the extension pipe 53, the liquid level in the extension pipe 53 will rise; in the process of rising the liquid level, the phase punching assembly 7 forms a certain obstruction, so that the compression force is consumed to a certain extent, and the effect of buffering the compression force is further optimized.

Referring to fig. 3, the opposite punch assembly 7 includes a stop lever 71, a stop plate 72, an opposite punch plate 73, a silica gel sleeve 74 and an opposite punch spring 75, one end of the stop lever 71 is fixed to the inner top wall of the extension pipe 53, the other end of the stop lever is fixed to the stop plate 72, the opposite punch plate 73 is slidably sleeved on the stop lever 71 and abuts against the top wall of the stop plate 72, the diameter of the stop plate 72 is smaller than that of the opposite punch plate 73, and the stop plate 72 can limit the opposite punch plate 73, so that the opposite punch plate 73 is not easy to slide from the stop lever 71.

The silica gel sleeve 74 is fixedly sleeved on the limiting rod 71 and the peripheral wall of the opposite punch plate 73, and the silica gel sleeve 74 can improve the tightness between the limiting rod 71 and the opposite punch plate 73 and the tightness between the opposite punch plate 73 and the inner wall of the extension pipe 53. The inner top wall of the extension pipe 53 is provided with ventilation holes 531 in a penetrating manner, and the opposite punching springs 75 are fixed between the top wall of the opposite punching plate 73 and the inner top wall of the extension pipe 53. In the process of lifting the liquid level in the extension pipe 53, normal saline will lift the opposite punch plate 73, and in the process of lifting, the gravity of the opposite punch plate 73, the thrust of the opposite punch spring 75 to the opposite punch plate 73 and the friction between the opposite punch plate 73 and the limiting rod 71 and between the opposite punch plate 73 and the inner wall of the extension pipe 53 need to be overcome, so that a certain obstruction is formed, the compression force is consumed to a certain extent, and the effect of buffering the compression force is further optimized; and after not being pressed, the opposite punch plate 73 can be restored to the original position by the urging force of the opposite punch spring 75.

Referring to fig. 3, the telescoping portion 6 includes telescoping rods 61, a sliding plate 62 and a sealing sleeve 63, one end of any one telescoping rod 61 of one group is fixed to the connecting hemisphere 34, the other end penetrates into the buffer tube 51, and one end of the other telescoping rod 61 is fixed to the arc-shaped boss 32, and the other end penetrates into the buffer tube 51. One end of the telescopic rod 61 positioned in the buffer tube 51 is fixed with the sliding plate 62, the sealing sleeve 63 is fixedly sleeved on the peripheral wall of the sliding plate 62 and abuts against the inner wall of the buffer tube 51, and the sealing sleeve 63 can improve the tightness between the sliding plate 62 and the inner wall of the buffer tube 51. When the spine is compressed, the telescopic rod 61 is contracted in the buffer tube 51 by being pressed, that is, the two sliding plates 62 in the single buffer tube 51 are continuously closed, and at this time, the normal saline in the buffer tube 51 is continuously pressed into the extension tube 53 through the connection tube 52, thereby achieving the effect of buffering the compression force.

Referring to fig. 3, specifically, the telescopic rod 61 includes an inner rod 611 and an outer rod 612, one end of the outer rod 612 is provided with a telescopic hole 6121, and the other end penetrates into the buffer tube 51 and is fixed to the sliding plate 62. One end of any one inner rod 611 of the group is fixed with the connecting hemisphere 34, the other end is inserted into the corresponding telescopic hole 6121, and one end of the other inner rod 611 is fixed with the arc-shaped protrusion 32, and the other end is inserted into the corresponding telescopic hole 6121. The outer rod 612 and the inner rod 611 are fixed by the fixing piece 8, in practical application, the length of the inner rod 611 extending into the telescopic hole 6121 can be adjusted according to the required distance between the titanium cage 1 and the connecting vertebral body 2, and after the adjustment is finished, the outer rod 612 and the inner rod 611 can be fixed by the fixing piece 8, so that the inner rod 611 is not easy to slide in the telescopic hole 6121.

Referring to fig. 3, the fixing member 8 includes a titanium pin 81, and the titanium pin 81 is fixed between the inner rod 611 and the outer rod 612. After the inner rod 611 is adjusted, a titanium pin 81 may be driven between the outer rod 612 and the inner rod 611 to complete the fixation of the inner rod 611 and the outer rod 612.

In the embodiment of the present application, some structures of the buffer portion 5, the telescopic portion 6 and the phase punching assembly 7 may be made of metal titanium.

The implementation principle of the rotatable elastic artificial vertebral body provided by the embodiment of the application is as follows: when the spine is compressed, the telescopic rod 61 is contracted in the buffer tube 51 by being pressed, that is, the two sliding plates 62 in the single buffer tube 51 are continuously closed, and at this time, the normal saline in the buffer tube 51 is continuously pressed into the extension tube 53 through the connection tube 52, thereby achieving the effect of buffering the compression force.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. The utility model provides a rotatable elasticity artificial vertebral body, includes titanium cage (111) and a pair of connection vertebral body (2), and titanium cage (111) are located between two connection vertebral bodies (2), its characterized in that: a connecting component (3) is arranged between the two connecting vertebral bodies (2) and the titanium cage (111), and a compression component is arranged on the connecting component (3);

the compression assembly comprises a cover part (4), a pair of buffer parts (5) and a pair of telescopic parts (6), wherein the cover part (4) is arranged on the connecting assembly (3), the telescopic parts (6) are arranged in the cover part (4), one end of each telescopic part is connected with the connecting assembly (3), the other end of each telescopic part is connected with the buffer parts (5), and the buffer parts (5) are arranged in the cover part (4);

the connecting assembly (3) comprises a fixed steel plate (31), arc-shaped protrusions (32), a connecting steel plate (33) and a connecting hemisphere (34), wherein the fixed steel plate (31) is fixed with a titanium cage (111), an arc-shaped groove (311) is formed in the fixed steel plate (31), the arc-shaped protrusions (32) are matched with the arc-shaped grooves (311), the connecting steel plate (33) is fixed with a connecting cone (2), hemispherical grooves (331) are formed in the connecting steel plate (33), the connecting hemisphere (34) is matched with the hemispherical grooves (331), a cover cap part (4) is connected between the arc-shaped protrusions (32) and the connecting hemisphere (34), one telescopic part (6) is connected with the connecting hemisphere (34), and the other telescopic part (6) is connected with the arc-shaped protrusions (32).

The cover cap part (4) comprises a bag (41), the bag (41) is fixedly embedded between the arc-shaped bulge (32) and the connecting hemisphere (34), and the telescopic part (6) and the buffer part (5) are both arranged in the bag (41);

the buffer part (5) comprises buffer tubes (51), connecting tubes (52) and extension tubes (53), wherein physiological saline is filled in the buffer tubes (51), the telescopic part (6) is connected with the buffer tubes (51), one end of each connecting tube (52) is communicated with the corresponding buffer tube (51), and the other end of each connecting tube is communicated with the corresponding extension tube (53).

2. A rotatable elastic artificial vertebral body according to claim 1, wherein: the telescopic part (6) comprises a telescopic rod (61), a sliding plate (62) and a sealing sleeve (63), wherein one end of the telescopic rod (61) of the telescopic part (6) is fixed with the connecting hemisphere (34), the other end of the telescopic rod is inserted into the buffer tube (51), the other end of the telescopic rod (61) of the telescopic part (6) is fixed with the arc-shaped bulge (32), the other end of the telescopic rod is inserted into the buffer tube (51), the sliding plate (62) is inserted into the buffer tube (51) and connected with the telescopic rod (61), and the sealing sleeve (63) is fixedly sleeved on the peripheral wall of the sliding plate (62) and abuts against the inner wall of the buffer tube (51).

3. A rotatable elastic artificial vertebral body according to claim 1, wherein: the pouch (41) comprises an outer bag (412) and an inner bag (411), wherein the outer bag (412) is fixed between the connecting hemisphere (34) and the arc-shaped bulge (32), a protection pad (42) is arranged between the outer bag (412) and the inner bag (411), and the inner bag (411) is filled with a sponge (43).

4. A rotatable elastic artificial vertebral body according to claim 1, wherein: and a phase punching component (7) is arranged in the extension pipe (53).

5. A rotatable elastic artificial vertebral body according to claim 4, wherein: the utility model provides a wash subassembly (7) mutually including gag lever post (71), limiting plate (72), wash board (73), silica gel cover (74) and wash spring (75) mutually, the one end of gag lever post (71) with the inner wall of extension pipe (53) is fixed, the other end with limiting plate (72) are fixed, wash board (73) cover to be located mutually on gag lever post (71) and with limiting plate (72) looks butt, silica gel cover (74) cover are located on gag lever post (71) with wash board (73) week wall mutually on, just wash board (73) mutually silica gel cover (74) with the inner wall looks of extension pipe (53) offsets tightly, extension pipe (53) keep away from one end of connecting pipe (52) runs through and has seted up bleeder vent (531), wash spring (75) mutually connect in between the inner wall of extension pipe (53).

6. A rotatable elastic artificial vertebral body according to claim 2, wherein: the telescopic rod (61) comprises an inner rod (611) and an outer rod (612), wherein the inner rod (611) of the telescopic rod (61) of one telescopic part (6) is fixed with the connecting hemisphere (34), the inner rod (611) of the telescopic rod (61) of the other telescopic part (6) is fixed with the arc-shaped bulge (32), one end of the outer rod (612) is provided with a telescopic hole (6121), the other end of the outer rod (612) is fixed with the sliding plate (62), the inner rod (611) slides in the corresponding telescopic hole (6121), and the outer rod (612) and the inner rod (611) are fixed through a fixing piece (8).

7. A rotatable elastic artificial vertebral body according to claim 6, wherein: the fixing member (8) comprises a titanium nail (81), and the titanium nail (81) is fixed between the inner rod (611) and the outer rod (612).