CN111643171B - Multi-stage angle dynamic vertebral body implantation system - Google Patents

Abstract

The invention relates to the technical field of dynamic internal fixation of vertebras, in particular to a multi-stage angle dynamic centrum implantation system, which comprises an upper cover, a lower cover, a movable part arranged between the upper cover and the lower cover and a connecting belt connected between the upper cover and the lower cover to limit the maximum distance between the upper cover and the lower cover; the movable part comprises an upper middle section unit and a lower middle section unit matched with the upper middle section unit; the middle-upper section unit at least comprises a movable block fixed with the upper cover and a movable cavity arranged on the movable block; the middle-lower section unit at least comprises a fixing block fixed with the lower cover and a limiting plate integrally connected to one side of the fixing block, the limiting plate extends into the movable cavity, and a movable gap exists between the side wall of the limiting plate and the inner wall of the movable cavity. The invention has better durability, can ensure the gap height between vertebral bodies, and allows a certain moving range of anteflexion, postextension, transverse bending and axial rotation of the spine of a patient.

Description

Multi-stage angle dynamic vertebral body implantation system

Technical Field

The invention relates to the technical field of dynamic internal fixation of vertebras, in particular to a multi-stage angle dynamic vertebral body implantation system.

Background

With the development of medical foundation, related disciplines and industrial technology, many basic concepts, diagnostic standards, therapeutic concepts and therapeutic methods in the field of spinal surgery are continuously perfected, the therapeutic level of spinal surgery diagnosis is continuously improved, and various spinal internal fixation systems appear in the market. In the 80 s of the last century, pedicle screw technology has been applied to treat various spinal diseases, and in the 90 s, fusion device systems are applied, wherein the principle of the spinal internal fixation systems is spinal fusion technology, namely, a diseased vertebral body is taken as the center, and one or two adjacent vertebral bodies are fused to form a whole, so that spinal fusion is still the main treatment method for treating degenerative instability of the spine at present. The advantages of this fusion surgical technique are: the pathological segment is fused in a bone manner, so that instability is eliminated, and pain is relieved; the disadvantages are that: adjacent segments become increasingly degenerative, presenting with the transition syndrome and possibly affecting part of the physiological function.

In order to maintain the height of the intervertebral space, maintain the stability of the spine and restore the function of the spine to the maximum, various lumbar non-fusion operations such as an artificial intervertebral disc, an artificial nucleus pulposus and X2 St op, Graf and Dynesys spinal posterior elastic fixation systems, etc. have been used in europe and parts of asia since 1990. Spinal stability reconstruction techniques are clearly unsuitable for young adults, athletes, and patients with multiple levels of degeneration, and fusion surgery would be an ideal choice, as it would provide a normal weight bearing pattern, alter spinal segment motion patterns and load transfer patterns, and restore normal vertebral body height and motion between segments.

The existing posterior spinal elastic fixation system is mainly realized by an elastic rod, a spring or other elastic parts are arranged in the elastic rod, and specifically, the traditional Chinese patent with the publication number of CN204246232U can be referred to, and a universal elastic fixation rod is disclosed, and when a patient bends forwards or backwards, the universal elastic fixation rod bends along with the universal elastic fixation rod.

However, the existing elastic rod dynamic internal fixing system has the following defects: after the bending times are too many, the original deformation cannot be completely recovered, so that the height of a gap between adjacent vertebral bodies is changed, further other complications are caused, and the durability is difficult to guarantee.

Disclosure of Invention

The invention aims to provide a multi-stage angle dynamic vertebral body implantation system which has better durability, can ensure the height of a gap between vertebral bodies and allows a certain moving range of forward flexion, backward extension, transverse bending and axial rotation of a vertebral column of a patient.

The technical purpose of the invention is realized by the following technical scheme: a multi-stage angle dynamic vertebral body implantation system comprises an upper cover, a lower cover, a movable part arranged between the upper cover and the lower cover and a connecting belt connected between the upper cover and the lower cover to limit the maximum distance between the upper cover and the lower cover;

the movable part comprises an upper middle section unit and a lower middle section unit matched with the upper middle section unit; the middle-upper section unit at least comprises a movable block fixed with the upper cover and a movable cavity arranged on the movable block; the middle-lower section unit at least comprises a fixing block fixed with the lower cover and a limiting plate integrally connected to one side of the fixing block, the limiting plate extends into the movable cavity, and a movable gap exists between the side wall of the limiting plate and the inner wall of the movable cavity.

By adopting the technical scheme, the upper cover and the lower cover in the application are fixed on the vertebral pedicle of the patient through the U-shaped vertebral pedicle screw, so that the gap height between the adjacent vertebral bodies can be ensured; through the clearance fit between limiting plate and the activity chamber for patient's backbone has certain anteflexion, back extension, horizontal bending, axial rotation's function, compares with the elastic rod among the prior art, and the problem that deformation resumes need not to be considered to the multistage angle developments centrum implantation system in this application, and is more durable.

The invention in a preferred example may be further arranged to: the limiting plate comprises a straight section and a limiting section which are integrally formed, the straight section is fixedly connected to the side wall of the fixed block, the limiting section extends into the movable cavity, a first slope surface which inclines downwards from the fixed block to the movable block is arranged on the upper surface of the limiting section, a second slope surface which inclines upwards from the fixed block to the movable block is arranged on the lower surface of the limiting section, and the slope of the first slope surface is larger than that of the second slope surface.

Through adopting above-mentioned technical scheme, have different activity to make the adjustment of adaptability to the human body in the direction of difference to the patient can adapt to fast after the operation.

The invention in a preferred example may be further arranged to: the middle upper section unit also comprises a plugboard fixedly connected to one side of the movable block; the upper cover comprises an irregular upper shell and an upper cylinder which is symmetrically and fixedly connected to the outer walls of the two ends of the upper shell, one side of the upper shell is provided with a mounting groove for extending a part of the movable block, the bottom of the mounting groove is provided with a slot matched with the inserting plate, and the inserting plate is inserted into the slot and fixed through a bolt.

Through adopting above-mentioned technical scheme, during the installation, insert the picture peg in the slot, pass the through-hole on last casing and the picture peg in proper order and with last casing threaded connection through the bolt, realize the fixed to middle and upper segment unit, at this moment, the one end that the baffle was kept away from to the movable block and the tank bottom looks butt of mounting groove.

The invention in a preferred example may be further arranged to: one end of the movable block fixedly connected with the inserting plate is also provided with a first threaded hole used for being connected with a bolt penetrating through the upper shell.

Through adopting above-mentioned technical scheme for improve the stability of being connected between well upper segment unit and the upper cover.

The invention in a preferred example may be further arranged to: the upper surface of the movable block is provided with a diagonal plane which deviates from the inserting plate and inclines downwards.

Through adopting above-mentioned technical scheme, the setting of scarf is mainly used for preventing that the movable block from taking place the scratch with the connecting band when the patient anteflexion or back-extension.

The invention in a preferred example may be further arranged to: the middle-upper section unit also comprises a guide plate fixedly connected to the side wall of the movable block right above the straight section, the guide plate is abutted against the fixed block, and an abdicating slope is arranged on one side of the guide plate close to the straight section.

By adopting the technical scheme, the guide plate plays a role in guiding when the patient makes anteflexion or extension movement.

The invention in a preferred example may be further arranged to: the lower cover comprises a lower shell and lower cylinders symmetrically fixedly connected to the outer walls of the two ends of the lower shell, and one side of the lower shell is provided with a fixing groove for inserting part of the fixing blocks; and a second threaded hole for connecting the bolt with the lower shell after penetrating through the lower shell is formed in one side, far away from the limiting plate, of the fixing block.

Through adopting above-mentioned technical scheme, during the installation, insert the fixed block in the fixed slot, pass lower casing and second screw hole threaded connection through the bolt, realize centering lower section unit's fixed.

The invention in a preferred example may be further arranged to: go up casing and lower casing relative one side and seted up cooperation groove and square groove respectively, the both ends of connecting band are pegged graft respectively to cooperation groove and square inslot and through adhesive fixation.

Through adopting above-mentioned technical scheme, the area of contact of connecting band and last casing and lower casing can be increased in the setting of cooperation groove and square groove to improve sticky stability indirectly.

The invention in a preferred example may be further arranged to: the sealing sleeve is sleeved outside the movable part and the connecting band; and one side of the upper shell, which is opposite to the lower shell, is respectively provided with an annular groove matched with the profile of the end part of the sealing sleeve, and two ends of the sealing sleeve are respectively inserted into the annular grooves and fixed by gluing.

Through adopting above-mentioned technical scheme, the setting of seal cover is mainly used for separating the inner structure of system and human internal tissue to protect movable part and connecting band, avoid human body fluid to cause the erosion to it.

The invention in a preferred example may be further arranged to: the upper surface of going up the casing is equipped with the third screw hole, and third screw hole female connection has the end cap, is equipped with the water conservancy diversion hole of intercommunication third screw hole and mounting groove in the upper casing.

Through adopting above-mentioned technical scheme, whole all the back that finishes of installing, staff's accessible third screw hole and water conservancy diversion hole pour into normal saline into to the airtight space that forms between upper cover, seal cover and the lower cover for offset the pressure that the liquid in the human body brought, thereby guarantee that the movable part can be more stable, good use.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the upper cover and the lower cover are fixed on the vertebral pedicle of the patient through the U-shaped vertebral pedicle screw, so that the height of a gap between adjacent vertebral bodies can be ensured; through clearance fit between the limiting plate and the movable cavity, the spine of the patient has certain functions of forward flexion, backward extension, transverse bending and axial rotation, and compared with an elastic rod in the prior art, the multi-stage angle dynamic vertebral body implantation system in the application does not need to consider the problem of deformation recovery and is more durable;

2. the upper cover and the middle and upper section units are fixed through two groups of bolts, so that the connection stability of the upper cover and the middle and upper section units is greatly improved;

3. by arranging the matching groove and the square groove, the contact area of the connecting belt with the upper shell and the lower shell can be increased, so that the gluing area is indirectly increased, and the stability after gluing is improved;

4. through to third screw hole and water conservancy diversion hole to the airtight space that forms between upper cover, seal cover and the lower cover in inject normal saline, can offset the pressure that liquid in the human body brought for the movable part can be more stable, good use.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view showing the positions and connection relationship of the upper cover, the movable part, the connecting band, the sealing sleeve and the lower cover;

FIG. 3 is a schematic diagram showing the structure of the upper unit;

FIG. 4 is an exploded view showing the fitting relationship between the upper unit and the upper cover;

FIG. 5 is a schematic structural view showing the fitting relationship between the third threaded hole and the plug;

FIG. 6 is an exploded view showing the fitting relationship between the middle and lower section units and the lower cover;

FIG. 7 is a sectional view showing the mating relationship of the restraint section and the active cavity;

FIG. 8 is a schematic structural diagram showing the positions of the fixing grooves and the square grooves on the lower cover;

fig. 9 is a simplified structural diagram of the side walls and side edges of the stopper section and the side walls of the movable block after being named separately, so as to describe the forward bending, backward extending, transverse bending, axial rotation and other actions in the specification.

Reference numeral, 1, an upper cover; 11. an upper housing; 111. a notch; 112. mounting grooves; 113. a slot; 114. a mating groove; 115. a third threaded hole; 116. a flow guide hole; 12. an upper column; 2. a lower cover; 21. a lower housing; 211. fixing grooves; 212. a square groove; 22. a lower column; 23. an annular member; 3. a connecting belt; 4. sealing sleeves; 5. an upper middle section unit; 51. a movable block; 52. a guide plate; 521. an abdication slope surface; 53. inserting plates; 531. a through hole; 54. a movable cavity; 55. a first threaded hole; 56. a chamfer plane; 6. a middle-lower section unit; 61. a fixed block; 62. a limiting plate; 621. a straight section; 622. a limiting section; 623. a first slope surface; 624. a second slope surface; 63. a second threaded hole; 7. a bolt; 8. an annular groove; 9. and (7) a plug.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the multi-stage angle dynamic vertebral body implantation system disclosed by the invention comprises an upper cover 1, a lower cover 2, a movable part arranged between the upper cover 1 and the lower cover 2, a connecting band 3 connected between the upper cover 1 and the lower cover 2, and a sealing sleeve 4 sleeved outside the movable part and the connecting band 3; the upper cover 1 and the lower cover 2 are respectively fixed on the vertebral pedicle of a patient through a U-shaped vertebral pedicle screw (not shown in the figure); the main function of the movable part is to ensure that the spine of the patient can have a better movable range after operation; the connecting belt 3 mainly has the function of limiting the maximum distance between the upper cover 1 and the lower cover 2 and ensuring that the movable part always has a good use state; the sealing sleeve 4 is connected between the upper cover 1 and the lower cover 2 in a sealing manner, so that a closed space is formed among the upper cover 1, the sealing sleeve 4 and the lower cover 2, and the sealing sleeve 4 is mainly used for separating the internal structure of the system from the tissues in the human body, so that the movable part and the connecting band 3 are protected.

The upper cover 1, the lower cover 2 and the movable part are processed by TC4 material, the TC4 material has good biocompatibility, corrosion resistance, small density, high specific strength and good toughness, and the TC4 material is applied to the application, so that the service life of the multi-stage angle dynamic vertebral body implantation system can be greatly prolonged; the connecting band 3 is made of medical fiber, the medical fiber has the advantages of no toxicity, purity, no anaphylactic reaction, no carcinogenicity, no thrombus, no damage to blood cells and no change of plasma protein components, and is more suitable for human bodies; the sealing sleeve 4 is a film type silica gel sleeve which also has good biocompatibility and various physical and chemical properties, and can ensure the use safety of patients.

Referring to fig. 2, the movable portion includes an upper middle section unit 5 and a lower middle section unit 6 coupled to the upper middle section unit 5, the upper middle section unit 5 is fixed to the upper cover 1, and the lower middle section unit 6 is fixed to the lower cover 2.

Referring to fig. 2 and 3, the middle-upper unit 5 includes a movable block 51, a guide plate 52 fixedly connected to one side of the movable block 51, and two strip-shaped insert plates 53 fixedly connected to one side of the movable block 51 opposite to the guide plate 52, a movable cavity 54 penetrating through the movable block 51 along the length direction of the insert plate 53 is provided in the movable block 51, one end of the movable block 51 fixedly connected to the insert plate 53 is provided with two first threaded holes 55, and the two first threaded holes 55 are symmetrically provided at the left and right sides of the movable cavity 54; the inserting plate 53 is flush with the upper surface of the movable block 51, and a through hole 531 is formed in the position, close to the free end, of the inserting plate 53; the upper surface of the movable block 51 is provided with a chamfer surface 56 which inclines downwards in an inclined way away from the inserting plate 53, the guide plate 52 is flush with the lower end of the chamfer surface 56, and the chamfer surface 56 is mainly used for preventing the movable block 51 from being scratched by the connecting belt 3 when a patient bends forwards or stretches backwards.

Referring to fig. 4 and 5, the upper cover 1 includes an irregular upper housing 11 and upper cylinders 12 symmetrically fixed on the outer walls of the two ends of the upper housing 11, the two upper cylinders 12 are fixed on the pedicle of the patient by U-shaped pedicle screws, which are prior art, and therefore, no further description is given here, and reference may be made to the U-shaped pedicle screw disclosed in chinese patent No. CN 101601601B. The upper shell 11 is provided with a notch 111 on one side far away from the upper unit 5, the shape of the notch 111 can be designed according to actual needs, and the notch 111 is mainly used for adapting to the spinous process structure on the spine of a patient so as to facilitate installation. One side of the upper shell 11, which is far away from the notch 111, is provided with a mounting groove 112 for extending a part of the movable block 51, the bottom of the mounting groove 112 is provided with slots 113 which are in one-to-one correspondence with the two insertion plates 53 and are matched with the two insertion plates 53, during mounting, the insertion plates 53 are inserted into the slots 113, the bolts 7 sequentially penetrate through holes 531 (shown in fig. 3) in the upper shell 11 and the insertion plates 53 and are in threaded connection with the upper shell 11, fixing of the middle-upper unit 5 is achieved, and at the moment, one end, far away from the guide plate 52, of the movable block 51 is.

In order to improve the connection stability between the upper section unit 5 and the upper cover 1, two bolts 7 are additionally arranged on one side of the upper cover 1, which is positioned at the notch 111, and the bolts 7 penetrate through the upper shell 11 and are in threaded connection with the first threaded holes 55 on the movable block 51.

Go up the upper surface of casing 11 and be equipped with third screw hole 115, third screw hole 115 internal thread connection has end cap 9, go up the water conservancy diversion hole 116 that is equipped with intercommunication third screw hole 115 and mounting groove 112 in the casing 11, the whole back that finishes of all installing, pour into normal saline into to airtight space through third screw hole 115 and water conservancy diversion hole 116 for offset the pressure that the liquid in the human body brought, thereby guarantee that the movable part can be more stable, good use.

Referring to fig. 6 and 7, the middle-lower section unit 6 includes a fixing block 61 and a limiting plate 62 integrally connected to one side of the fixing block 61, a second threaded hole 63 is provided on one side of the fixing block 61 away from the limiting plate 62, each edge of the limiting plate 62 is provided with a chamfer, the limiting plate 62 includes a straight section 621 and a limiting section 622 which are integrally formed, and the straight section 621 is fixedly connected to the side wall of the fixing block 61. The guide plate 52 is located right above the straight section 621 and abuts against the fixed block 61, and the guide plate 52 plays a role in guiding during the process of the patient bending forwards or stretching backwards. The limiting section 622 extends into the movable cavity 54, and a movable gap exists between the side wall of the limiting section 622 and the inner wall of the movable cavity 54, so that the patient can do forward bending, backward extending, transverse bending, axial rotation and the like. The upper surface of the limiting section 622 is provided with a first slope surface 623 inclined downwards from the fixed block 61 to the movable block 51, the first slope surface 623 faces the back, the lower surface of the limiting section 622 is provided with a second slope surface 624 inclined upwards from the fixed block 61 to the movable block 51, and the second slope surface 624 faces the abdomen. In order to ensure that the patient can stretch backwards, an abdicating slope 521 is arranged on one side of the guide plate 52 close to the straight section 621, and a moving space is formed between the abdicating slope 521 and the straight section 621.

Referring to fig. 6 and 8, the lower cap 2 includes a lower housing 21 and lower cylinders 22 symmetrically fixed on the outer walls of both ends of the lower housing 21, and the two lower cylinders 22 are fixed on the pedicle of the patient by U-shaped pedicle screws. The fixing groove 211 matched with the fixing block 61 is formed in one side of the lower shell 21, during installation, the fixing block 61 is inserted into the fixing groove 211, the bolt 7 penetrates through the lower shell 21 and is in threaded connection with the second threaded hole 63, and fixing of the middle-lower section unit 6 is achieved. An annular member 23 for hiding the nut is fixed to the side wall of the lower case 21 at a position corresponding to the bolt 7.

Referring to fig. 4 and 8, the opposite sides of the upper housing 11 and the lower housing 21 are respectively provided with a fitting groove 114 and a square groove 212, and two ends of the connecting belt 3 are respectively inserted into the fitting groove 114 and the square groove 212 and fixed by gluing, and normally, the connecting belt 3 is in a loose state.

The opposite sides of the upper shell 11 and the lower shell 21 are also respectively provided with an annular groove 8 matched with the end profile of the sealing sleeve 4, and two ends of the sealing sleeve 4 are respectively inserted into the annular grooves 8 and are sealed and fixed in an adhesive manner.

Referring to fig. 9, for convenience of understanding, four side walls of the limiting section 622 are respectively named as a, c, e, g, and four side edges are respectively named as b, d, f, h; the four side walls of the movable block 51 are named A, B, C, D, respectively, where a corresponds to a, B corresponds to C, C corresponds to e, and D corresponds to g. When the patient bends forwards, the spine drives the movable block 51 to tilt forwards, so that a approaches a (a first slope surface) and C leaves e (a second slope surface), and in the process of bending forwards, a small-amplitude stretching is generated between the movable block 51 and the limiting section 622; when the patient extends backwards, the spine drives the movable block 51 to lean backwards, so that the C approaches to the e (the second slope surface) and the A is far away from the a (the first slope surface); when the patient bends transversely, the spine drives the movable block 51 to swing left and right, so that the D is close to the B and is far from the c, or the B is close to the D and is far from the g; when the patient rotates axially, the spine drives the movable block 51 to twist left and right, so that the C approaches to the A towards h towards d or approaches to the A towards b towards f; the patient swings forward and backward in the range of +8 ° to-2 ° (forward flexion is +), bends laterally in the range of +5 ° to-5 °, and rotates axially in the range of +1.5 ° to-1.5 °.

The upper cover 1 and the lower cover 2 are fixed on the vertebral pedicle of a patient through U-shaped vertebral pedicle screws, so that the height of a gap between adjacent vertebral bodies can be ensured; through the clearance fit between limiting plate 62 and the activity chamber 54 for patient's backbone has certain anteflexion, back extension, horizontal bending, axial rotation's function, compares with the elastic rod among the prior art, and the multistage angle developments centrum implantation system in this application need not to consider the problem of deformation recovery, and is more durable.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (10)

1. A multi-level angular dynamic vertebral body implantation system, comprising: comprises an upper cover (1), a lower cover (2), a movable part arranged between the upper cover (1) and the lower cover (2) and a connecting belt (3) connected between the upper cover (1) and the lower cover (2) to limit the maximum distance between the upper cover and the lower cover;

the movable part comprises an upper middle section unit (5) and a lower middle section unit (6) matched with the upper middle section unit (5); the middle-upper section unit (5) at least comprises a movable block (51) fixed with the upper cover (1) and a movable cavity (54) arranged on the movable block (51); the middle-lower section unit (6) at least comprises a fixed block (61) fixed with the lower cover (2) and a limiting plate (62) integrally connected to one side of the fixed block (61), the limiting plate (62) extends into the movable cavity (54), and a movable gap exists between the side wall of the limiting plate (62) and the inner wall of the movable cavity (54).

2. The multi-level angular dynamic vertebral body implant system of claim 1, wherein: limiting plate (62) are including integrated into one piece's straight section (621) and spacing section (622), straight section (621) rigid coupling is on the lateral wall of fixed block (61), spacing section (622) stretch into activity chamber (54) in, the upper surface of spacing section (622) is equipped with by fixed block (61) first domatic (623) that incline down to movable block (51), the lower surface of spacing section (622) is equipped with fixed block (61) and inclines the domatic (624) of second that inclines upward to movable block (51), the slope of first domatic (623) is greater than the domatic (624) of second.

3. The multi-level angular dynamic vertebral body implant system of claim 1, wherein: the middle upper section unit (5) also comprises an inserting plate (53) fixedly connected to one side of the movable block (51); the upper cover (1) comprises an irregular upper shell (11) and upper columns (12) symmetrically fixedly connected to the outer walls of the two ends of the upper shell (11), one side of the upper shell (11) is provided with a mounting groove (112) for a part of the movable block (51) to extend into, the bottom of the mounting groove (112) is provided with a slot (113) matched with the inserting plate (53), and the inserting plate (53) is inserted into the slot (113) and fixed through a bolt (7).

4. The multi-level angular dynamic vertebral body implant system of claim 1, wherein: one end of the movable block (51) fixedly connected with the inserting plate (53) is also provided with a first threaded hole (55) used for being connected with a bolt (7) penetrating through the upper shell (11).

5. The multi-level angular dynamic vertebral body implant system of claim 1, wherein: the upper surface of the movable block (51) is provided with a chamfer surface (56) which deviates from the inserting plate (53) and inclines downwards.

6. The multi-level angular dynamic vertebral body implant system of claim 2, wherein: the middle-upper section unit (5) further comprises a guide plate (52) fixedly connected to the side wall of the movable block (51) located right above the straight section (621), the guide plate (52) is connected with the fixed block (61) in a butting mode, and an abdicating slope surface (521) is formed in one side, close to the straight section (621), of the guide plate (52).

7. The multi-level angular dynamic vertebral body implant system of claim 3, wherein: the lower cover (2) comprises a lower shell (21) and lower cylinders (22) which are symmetrically fixedly connected to the outer walls of the two ends of the lower shell (21), and one side of the lower shell (21) is provided with a fixing groove (211) for inserting a part of fixing blocks (61); one side of the fixing block (61) far away from the limiting plate (62) is provided with a second threaded hole (63) which is used for being connected with the bolt (7) after penetrating through the lower shell (21).

8. The multi-level angular dynamic vertebral body implant system of claim 7, wherein: go up casing (11) and casing (21) relative one side and seted up cooperation groove (114) and square groove (212) respectively, the both ends of connecting band (3) are inserted respectively and are connected to in cooperation groove (114) and the square groove (212) and through gluing fixed.

9. The multi-level angular dynamic vertebral body implant system of claim 7, wherein: the connecting device also comprises a sealing sleeve (4) sleeved outside the movable part and the connecting band (3);

go up casing (11) and casing (21) relative one side respectively seted up annular, with seal cover (4) tip profile looks adaptation annular groove (8), the both ends of seal cover (4) are inserted respectively to be connected to in annular groove (8) and through sticky fixed.

10. The multi-level angular dynamic vertebral body implant system of claim 9, wherein: the upper surface of the upper shell (11) is provided with a third threaded hole (115), the third threaded hole (115) is connected with a plug (9) in an internal thread mode, and a flow guide hole (116) which is communicated with the third threaded hole (115) and the mounting groove (112) is formed in the upper shell (11).

Images