CN210170233U

CN210170233U - Intervertebral fusion cage capable of being unfolded in four directions

Info

Publication number: CN210170233U
Application number: CN201920330932.0U
Authority: CN
Inventors: Zhenshan Xu; 许振山; Jizong Qi; 齐继宗; Yong Song; 宋勇
Original assignee: Bonenghua Medical Devices Beijing Co Ltd
Current assignee: Bonenghua Medical Devices Beijing Co Ltd
Priority date: 2019-03-15
Filing date: 2019-03-15
Publication date: 2020-03-24
Anticipated expiration: 2029-03-15

Abstract

The utility model belongs to the technical field of interbody fusion cage medical instrument technique and specifically relates to an interbody fusion cage that quadriversal expandes, this interbody fusion cage of its characterized in that expands fusion cage by quadriversal expansion mechanism and drive distraction mechanism and constitutes, quadriversal expansion mechanism by preceding last distraction plate, preceding distraction plate down, back on distraction plate and back distraction plate component down, preceding distraction plate on by preceding curb plate and last curb plate component, preceding distraction plate down by preceding slide and lower curb plate component, back on distraction plate by back slide and upper shoe component, back distraction plate constitute by back curb plate and lower curb plate, have the power of strutting that utilizes interbody fusion cage, restore the height and the tension of vertebra festival, realize relieving the oppression, restore the physiology of vertebra curvature, interbody fusion cage osseous fusion, advantage such as the stable quadriversal expansion of guarantee backbone.

Description

Intervertebral fusion cage capable of being unfolded in four directions

Technical Field

The invention relates to the technical field of medical instruments of an interbody fusion cage, in particular to an interbody fusion cage which is unfolded in four directions and utilizes the distraction force of the interbody fusion cage to recover the height and tension of vertebral segments, realize the release of compression, recover the physiological curvature of the spine, ensure the bony fusion of the interbody fusion cage and ensure the stability of the spine.

Background

As is well known, in clinical orthopedics, spinal degeneration is common, and intervertebral disc degeneration, spinal stenosis, spondylolisthesis and spinal cord or nerve root compression are common, so that the patients need surgical treatment, the compression is thoroughly removed, the physiological curvature of the spine is restored, and the spinal stability is guaranteed. Other patients with spinal deformities, trauma, tumors, revision surgery and infections sometimes also undergo interbody fusion to stabilize the lumbar segment. The interbody fusion cage has better curative effect aiming at the spine diseases, has simple operation, convenient use and high fusion rate, does not have complications of bone grafting fusion, is generally applied and clinical at present, but still has the defects of low stability and the like.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provide the four-way unfolded interbody fusion cage which utilizes the distraction force of the interbody fusion cage to recover the height and tension of vertebral segments, realizes the release of compression, recovers the physiological curvature of the spine, ensures the bony fusion of the interbody fusion cage and ensures the stability of the spine.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an intervertebral fusion device which is unfolded in four directions is characterized in that the intervertebral fusion device consists of a four-direction unfolding fusion mechanism and a driving unfolding mechanism,

the four-way unfolding and fusing mechanism consists of a front upper opening plate, a front lower opening plate, a rear upper opening plate and a rear lower opening plate, the front upper opening plate consists of a front side plate and an upper side plate, the front lower opening plate consists of a front sliding plate and a lower sliding plate, the rear upper opening plate consists of a rear sliding plate and an upper sliding plate, the rear lower opening plate consists of a rear side plate and a lower side plate,

the upper end of the front side plate in the front upper expanding plate is connected with the front end of the upper side plate to form an L-shaped plate, the left side and the right side of the front side plate are respectively provided with an end part sliding groove for the front sliding plate in the front lower expanding plate to slide up and down, the front side plate on the side surface of the end part sliding groove is provided with a sliding boss, the middle part of the upper side plate is provided with a middle part sliding groove for the upper sliding plate in the rear upper expanding plate to slide up and down, the upper side plates on the left side and the right side of the middle part sliding groove are provided with sliding grooves,

the upper end of the rear sliding plate in the rear upper expanding plate is connected with the rear end of the upper sliding plate to form an L-shaped plate, the left end and the right end of the upper sliding plate are respectively provided with an end sliding groove for the upper side plate to slide forwards and backwards, the upper sliding plate on the side surface of the end sliding groove is provided with a sliding boss, the sliding boss of the upper sliding plate is matched and slidably connected with a sliding groove on the side surface of the upper side plate middle sliding groove, so that the upper sliding plate and the upper side plate can slide forwards and backwards, the middle part of the rear sliding plate is provided with a middle sliding groove for the rear lower expanding plate to slide upwards and downwards, the rear sliding plates on the left side and the right side of the middle sliding groove are provided with sliding grooves,

the lower end of the rear side plate in the rear lower expanding plate is connected with the rear end of the lower side plate to form an L-shaped plate, the left end and the right end of the rear side plate are respectively provided with an end part sliding groove for the rear sliding plate to slide up and down, the rear side plate on the side surface of the end part sliding groove is provided with a sliding boss, the sliding boss on the rear side plate is matched and connected with the sliding groove on the rear sliding plate in a sliding way, so that the rear sliding plate and the rear side plate can slide up and down, the middle part of the lower side plate is provided with a middle sliding groove for the front sliding plate and the rear sliding plate to slide back and forth in the front lower side plate, the lower side plates on the,

the front end of a lower sliding plate in the front lower expanding plate is connected with the lower end of a front sliding plate to form an L-shaped plate, the left end and the right end of the lower sliding plate are respectively provided with an end part sliding groove for the lower side plate to slide back and forth, the lower sliding plate on the side surface of the end part sliding groove is provided with a sliding boss, the sliding boss on the lower sliding plate is matched and connected with the sliding groove on the lower side plate in a sliding way, so that the back and forth sliding between the lower sliding plate and the lower side plate is realized, the middle part of the front sliding plate is provided with a middle sliding groove for the front side plate in the front upper expanding plate to slide up and down, the front sliding plates on the left side and the right side of the middle sliding groove are provided with sliding grooves,

the upper side plate in the front upper expanding plate and the upper side plate in the rear upper expanding plate are matched with the sliding groove through a sliding boss and are in front-and-back sliding connection, the rear slide plate in the rear upper expanding plate and the rear side plate in the rear lower expanding plate are matched with the sliding groove through a sliding boss and are in up-and-down sliding connection, the lower side plate in the rear lower expanding plate and the lower slide plate in the front lower expanding plate are matched with the sliding groove through a sliding boss and are in front-and-back sliding connection, the front slide plate in the front lower expanding plate and the front side plate in the front upper expanding plate are matched with the sliding groove through a sliding boss and are in up-and-down sliding connection, and encircling connection is realized,

the left side and the right side of the four-way unfolding and fusing mechanism are respectively provided with a driving unfolding mechanism, the driving unfolding mechanism consists of a left traction block and a right pushing block, the left traction block and the right pushing block are respectively arranged on the left end surface and the right end surface of an encircling structure formed by mutually sliding and connecting a front upper unfolding plate, a front lower unfolding plate, a rear upper unfolding plate and a rear lower unfolding plate, the left traction block consists of a left traction part and a left expansion part, the left traction part is arranged on the left side of the left expansion part, the left expansion part is in a frustum shape, the middle parts of the left expansion part and the left traction part are provided with coaxial traction screw holes, the frustum-shaped left expansion part of the left traction block extends into the left end part of the four-way unfolding and fusing mechanism, the right pushing block consists of a right expansion part and a right pushing part, the right expansion part is arranged on the left side of the right pushing part, the right expansion part is in a frustum shape, the middle parts of the right expansion part and the right propulsion part are provided with propulsion through holes which are coaxial with the traction screw holes, the propulsion through holes are penetrated through the implant holder to be connected with the traction screw holes in the left traction block, and the front upper expanding plate, the front lower expanding plate, the rear upper expanding plate and the rear lower expanding plate in the four-way unfolding and fusing mechanism are expanded in four directions through the inward contraction of the left traction block and the right propulsion block.

The intervertebral fusion cage is driven by an implant holder to expand in four directions, the implant holder consists of a handle, a traction rod, a pushing rod and a pushing knob, the pushing rod is tubular, the right end of the handle is connected with the traction rod, the left end of the traction rod is provided with a pulling thread matched with a left traction block, the right end of a front pull rod is provided with a pushing thread, the pushing knob is sleeved outside the pushing thread and connected with the traction rod through the thread, the left end of the pushing knob is connected with the pushing rod sleeved outside the traction rod, and the distance between the left end of the pushing rod and the left end of the traction rod is reduced by rotating the pushing knob to realize the distance between the left traction block and the right traction block.

The diameter of the push rod is larger than that of the push through hole of the right push block, so that the push rod is abutted against the side face of the push block to push.

The right end of the push rod is rotatably connected with the left end of the push knob through a rotating mechanism, and the rotating mechanism is in a structure that a bearing or an annular groove is matched with an annular boss for connection.

The upper end surface and the lower end surface of a left traction part of the left traction block are respectively provided with an anti-falling limiting protrusion, the upper side plate, the upper sliding plate, the lower side plate and the lower sliding plate which correspond to the left traction block are respectively provided with an anti-falling limiting groove, the left traction block is clamped in a four-way unfolding and fusing mechanism which is opened in four directions through the matching connection of the anti-falling limiting protrusion and the anti-falling limiting groove, the upper end surface and the lower end surface of a right pushing part in the right pushing block are respectively provided with the anti-falling limiting protrusion, the upper side plate, the upper sliding plate, the lower side plate and the lower sliding plate which correspond to the right pushing block are respectively provided with the anti-falling limiting groove, and the pushing block is clamped in the four-way unfolding and fusing mechanism which is opened in four directions through the matching connection of the anti-falling.

According to the invention, the right sides of the upper anti-falling limiting bulges and the lower anti-falling limiting bulges of the right pushing part in the right pushing block are provided with the anti-moving bosses, the anti-moving bosses above the right pushing part are arranged at the front end of the right pushing part of the right pushing block, the anti-moving bosses below the right pushing part are arranged at the rear end of the right pushing block, the upper side plate and the lower side plate are respectively provided with the anti-moving chutes matched with the anti-moving bosses, and the fixed right pushing block is prevented from moving left and right through the anti-moving bosses.

Plant holes for bone fusion materials to enter are respectively formed in the front side plate, the upper side plate, the front sliding plate, the lower sliding plate, the rear sliding plate, the upper sliding plate, the rear side plate and the lower side plate, so that the fusion cage can be conveniently fused with intervertebral bones.

The upper side plate, the lower sliding plate, the upper sliding plate and the lower side plate are respectively provided with the sawtooth bosses, so that the stability of fixation between the upper side plate, the lower sliding plate, the upper sliding plate and the lower side plate and the intervertebral space is ensured, and the sliding is prevented.

The sliding lug boss, the sliding groove, the movement resisting lug boss and the movement resisting sliding chute can be respectively designed into mutually matched I shapes, column shapes, trapezoids, dovetail shapes, rectangles, circular arcs, polygons, opposite shapes or other shapes which can realize sliding.

The anti-falling limiting protrusion and the anti-falling limiting groove can be respectively designed into inverted teeth or arc-shaped protrusions or other shapes capable of realizing sliding clamping.

The invention is characterized in that the interbody fusion cage consists of a four-way unfolding fusion mechanism and a driving unfolding mechanism, the four-way unfolding fusion mechanism consists of a front upper unfolding plate, a front lower unfolding plate, a rear upper unfolding plate and a rear lower unfolding plate, the front upper unfolding plate consists of a front side plate and an upper side plate, the front lower unfolding plate consists of a front sliding plate and a lower sliding plate, the rear upper unfolding plate consists of a rear sliding plate and an upper sliding plate, the rear lower unfolding plate consists of a rear side plate and a lower side plate, a left pulling block and a right pushing block in the driving unfolding mechanism are pulled by an implanting holder to further drive the front side plate, the upper side plate, the front sliding plate, the lower sliding plate, the rear sliding plate, the upper sliding plate, the rear side plate and the lower side plate to move back and forth and back and up and down along a sliding boss and a sliding groove respectively to realize embracing and unfolding, and the unfolding are provided with the unfolding force of the interbody fusion cage to restore the height and tension of, the compression is relieved, the physiological curvature of the spine is recovered, the intervertebral fusion cage is fused in a bone manner, and the stable four-way unfolding of the spine is guaranteed.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the expanded structure of the present invention.

Fig. 3 is a schematic view of the internal structure of fig. 2 after expansion.

FIG. 4 is a schematic structural view of a front lower spreader plate and a rear upper spreader plate of the present invention, wherein 4-1 is a perspective view, and 4-2 is another perspective view.

FIG. 5 is a schematic structural view of the front upper expanding plate and the rear lower expanding plate of the present invention, wherein 5-1 is a perspective view, and 5-2 is another perspective view.

FIG. 6 is a schematic structural view of the left pulling block of the present invention, wherein 6-1 is a perspective view and 6-2 is a front view.

Fig. 7 is a schematic structural view of the right thrust block of the present invention, wherein 7-1 is a perspective view, 7-2 is a front view, and 7-3 is a perspective view in another direction.

Fig. 8 is a using state diagram of the invention, wherein 8-1 is a using state diagram before distraction, and 8-2 is a using state diagram after distraction.

Figure 9 is a schematic view of the construction of the implant holder of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

as shown in the attached drawings, the four-way unfolding interbody fusion cage is characterized by comprising a four-way unfolding fusion mechanism and a driving unfolding mechanism, wherein the four-way unfolding fusion mechanism comprises a front upper unfolding plate 1, a front lower unfolding plate 2, a rear upper unfolding plate 3 and a rear lower unfolding plate 4, the front upper unfolding plate 1 comprises a front side plate and an upper side plate, the front lower unfolding plate 2 comprises a front sliding plate and a lower sliding plate, the rear upper unfolding plate 3 comprises a rear sliding plate and an upper sliding plate, the rear lower unfolding plate 4 comprises a rear side plate and a lower side plate, the upper end of the front side plate in the front upper unfolding plate 1 is connected with the front end of the upper side plate to form an L-shaped plate, the left side and the right side of the front side plate are respectively provided with an end sliding groove 7 for the front sliding plate in the front lower unfolding plate 2 to slide up and down, and the front side plate on the side of the end sliding groove 7 is provided with a sliding boss 5, the middle part of the upper side plate is provided with a middle sliding groove 8 for the sliding of the upper sliding plate in the rear upper expanding plate 3, the upper sliding plates on the left and right sides of the middle sliding groove 8 are provided with sliding grooves 6, the upper end of the rear sliding plate in the rear upper expanding plate 3 is connected with the rear end of the upper sliding plate to form an L-shaped plate, the left and right ends of the upper sliding plate are respectively provided with end sliding grooves 7 for the front and rear sliding of the upper sliding plate, the upper sliding plate on the side of the end sliding groove 7 is provided with a sliding boss 5, the sliding boss 5 of the upper sliding plate is matched and slidably connected with the sliding groove 6 on the side of the upper sliding groove 8, so as to realize the front and rear sliding between the upper sliding plate and the upper sliding plate, the middle part of the rear sliding plate is provided with a middle sliding groove 8 for the up and down sliding of the rear side plate in the rear lower expanding plate 4, the rear sliding plates on the left, the lower end of the rear side plate in the rear lower expanding plate 4 is connected with the rear end of the lower side plate to form an L-shaped plate, the left end and the right end of the rear side plate are respectively provided with an end part sliding groove 7 for the rear sliding plate to slide up and down, the rear side plate on the side surface of the end part sliding groove 7 is provided with a sliding boss 5, the sliding boss 5 on the rear side plate is matched and slidably connected with a sliding groove 6 on the rear sliding plate, so that the rear sliding plate and the rear side plate can slide up and down, the middle part of the lower side plate is provided with a middle sliding groove 8 for the lower sliding plate in the front lower side plate to slide back and forth, the lower side plates on the left side and the right side of the middle sliding groove 8 are provided with sliding grooves 6, the front end of the lower sliding plate in the front lower expanding plate 2 is connected with the lower end of the front sliding plate to form an L-shaped plate, the left, the lower slide plate of tip sliding tray 7 side on be equipped with slip boss 5, slip boss 5 on the lower slide plate and slip recess 6 on the lower slide plate cooperate sliding connection, and then realize sliding around between lower slide plate and the lower side plate, the middle part of preceding slide plate be equipped with and supply preceding upward expansion board 1 in preceding curb plate gliding middle part sliding tray 8 from top to bottom, the preceding slide plate of the left and right sides of middle part sliding tray 8 on be equipped with slip recess 6, slip recess 6 and preceding slide plate in slip boss 5 cooperation in the curb plate slide connection from top to bottom, preceding upward expansion board 1 in the upper side board and the last slide plate in back upward expansion board 3 through slip boss 5 with slip recess 6 cooperation front to back sliding connection, back slide plate in back upward expansion board 3 and the back curb plate in back downward expansion board 4 through slip boss 5 and slip recess 6 cooperation sliding connection from top to bottom, back downward expansion board 4 in lower curb plate and preceding downward expansion board 2 through slip boss 5 and slip recess 6 cooperation sliding connection from top to bottom 6, the front sliding plate in the front lower expanding plate 2 and the front side plate in the front upper expanding plate 1 are in sliding connection with each other through a sliding boss 5 and a sliding groove 6, so that encircling connection is realized, the left and right sides of the four-way unfolding and fusing mechanism are respectively provided with a driving expanding mechanism, the driving expanding mechanism consists of a left traction block 9 and a right propulsion block 10, the left traction block 9 and the right propulsion block 10 are respectively arranged on the left end surface and the right end surface of an encircling structure formed by the mutual sliding connection of the front upper expanding plate 1, the front lower expanding plate 2, the rear upper expanding plate 3 and the rear lower expanding plate 4, the left traction block 9 consists of a left traction part 11 and a left expansion part 12, the left traction part 11 is arranged on the left side of the left expansion part 12, the left expansion part 12 is arranged in a frustum shape, the middle parts of the left expansion part 12 and the left traction part 11 are provided with a coaxial traction screw hole 15, the left expansion part 12 of the left traction block 9 is extended into the left end part of the four-way expansion fusion mechanism, the right propulsion block 10 is composed of a right expansion part 13 and a right propulsion part 14, the right expansion part 13 is arranged on the left side of the right propulsion part 14, the right expansion part 13 is in a frustum shape, the middle parts of the right expansion part 13 and the right propulsion part 14 are provided with a propulsion through hole 16 which is coaxial with a traction screw hole 15, the propulsion through hole 16 is connected with the traction screw hole 15 in the left traction block 9 through an implantation holder, the four-way expansion of the front upper supporting plate 1, the front lower supporting plate 2, the rear upper supporting plate 3 and the rear lower supporting plate 4 in the four-way expansion fusion mechanism is realized through the inward contraction of the left traction block 9 and the right propulsion block 10, the intervertebral fusion device is driven by implantation to expand in four directions, the implantation holder is composed of a handle 23, a traction rod 24, a propulsion rod 25 and a propulsion knob 26, the push rod 25 is tubular, the right end of the handle 23 is connected with the pull rod 24, the left end of the pull rod 24 is provided with a pull thread matched with the left pull block, the right end of the front pull rod is provided with a push thread, the outer side of the push thread is sleeved with a push knob 26, the push knob 26 is in threaded connection with the pull rod 24, the left end of the push knob 26 is connected with the push rod 25 sleeved on the outer side of the pull rod 24, the distance between the left end of the push rod 25 and the left end of the pull rod 24 is reduced by rotating the push knob 26 to realize the distance between the left pull block and the right push block, the diameter of the push rod 25 is larger than that of a push through hole of the right push block, so that the push rod 25 is abutted against the side surface of the push block to be pushed, the right end of the push rod 25 is rotatably connected with the left end of the push knob 26 through a rotating mechanism, the rotating mechanism is a bearing or an annular groove to be connected with an annular boss matching, the upper end surface and the lower end surface of a left traction part 11 of the left traction block 9 are respectively provided with an anti-falling limiting bulge 17, an upper side plate, an upper sliding plate, a lower side plate and a lower sliding plate which correspond to the left traction block 9 are respectively provided with an anti-falling limiting groove 18, the left traction block 9 is clamped in a four-way unfolding fusion mechanism which is unfolded in four directions through the matching connection of the anti-falling limiting bulge 17 and the anti-falling limiting groove 18, the upper end surface and the lower end surface of a right propulsion part 14 in the right propulsion block 10 are respectively provided with the anti-falling limiting bulge 17, the upper side plate, the upper sliding plate, the lower side plate and the lower sliding plate which correspond to the right propulsion block 10 are respectively provided with the anti-falling limiting groove 18, the propulsion block is clamped in the four-way unfolding fusion mechanism which is unfolded in four directions through the matching connection of the anti-falling limiting bulge 17 and the anti-falling limiting groove 18, the right sides of the upper and the lower anti-falling limiting bulge 17 of the right, the upper side plate, the lower side plate, the upper sliding plate, the lower sliding plate, the upper sliding plate, the lower sliding plate and the intervertebral plate are respectively provided with a sawtooth-shaped boss 22 to ensure the stability of the fixation between the upper side plate, the lower sliding plate, the upper sliding plate and the intervertebral plate and prevent the slipping, the sliding boss 5 and the sliding groove 6 are arranged at the front end of the right propelling part 14 of the right propelling block 10, the boss 19 below the right propelling part 14 is arranged at the rear end of the right propelling block 10, the sliding chutes 20 matched with the boss 19 are respectively arranged on the upper side plate and the lower side plate, the fixed right propelling block 10 is prevented from moving left and right through the boss 19, the front side plate, the upper side plate, the front sliding plate, the lower sliding plate, the rear sliding plate, the upper sliding plate, the rear sliding plate and the lower side plate are respectively provided with a plant hole 21 for bone fusion materials to enter, so that the fusion device and the bone fusion device are, The movement-resisting boss 19 and the movement-resisting sliding groove 20 can be respectively designed into mutually matched I shapes, column shapes, trapezoids, dovetail shapes, rectangles, circular arcs, polygons, opposite shapes or other shapes which can realize sliding. The anti-falling limiting protrusion 17 and the anti-falling limiting groove 18 can be respectively designed into inverted teeth or arc-shaped protrusions or other shapes capable of realizing sliding clamping.

When the invention is used, when the implant holder pulls the left traction block 9 and pushes the right pushing block 10, the distance between the left traction block 9 and the right pushing block 10 is reduced and shortened, the left traction block 9 and the right pushing block 10 are continuously placed into the four-way unfolding fusion mechanism and continuously support the four-way unfolding fusion mechanism, so as to realize the four-way unfolding of the interbody fusion cage, the upper end surface and the lower end surface of the left traction part 11 of the left traction block 9 are respectively provided with an anti-falling limiting bulge 17, the upper side plate, the upper sliding plate, the lower side plate and the lower sliding plate which correspond to the left traction block 9 are respectively provided with an anti-falling limiting groove 18, the left traction block 9 is clamped in the four-way unfolding fusion mechanism which is unfolded in four directions through the matching connection of the anti-falling limiting bulge 17 and the anti-falling limiting groove 18, the upper end surface and the lower end surface of the right pushing part 14 in the right pushing block 10 are respectively provided with the anti-, the upper side plate, the upper sliding plate, the lower side plate and the lower sliding plate corresponding to the right propelling block 10 are respectively provided with an anti-falling limiting groove 18, the propelling block is clamped in a four-way unfolding fusion mechanism which is unfolded in four directions through the matching connection of an anti-falling limiting bulge 17 and the anti-falling limiting groove 18, when the driving and unfolding mechanism is pushed into the four-way unfolding fusion mechanism, the limiting can be carried out through the matching of the anti-falling limiting bulge 17 and the anti-falling limiting groove 18, the front and back falling-off of the driving and unfolding mechanism after being placed into the four-way unfolding fusion mechanism and the left and right displacement of the driving and unfolding mechanism after being placed into the four-way unfolding fusion mechanism are prevented, the driving and unfolding structure is pulled and pushed by an implantation holder and placed into the four-way unfolding fusion mechanism, so that the four-way unfolding fusion mechanism is unfolded in four directions, the intervertebral fusion device consists of the four-way unfolding, the four-direction unfolding fusion mechanism consists of a front upper opening plate 1, a front lower opening plate 2, a rear upper opening plate 3 and a rear lower opening plate 4, the front upper opening plate 1 consists of a front side plate and an upper side plate, the front lower opening plate 2 consists of a front sliding plate and a lower sliding plate, the rear upper opening plate 3 consists of a rear sliding plate and an upper sliding plate, the rear lower opening plate 4 consists of a rear side plate and a lower side plate, a left traction block 9 and a right propulsion block 10 in the driving opening mechanism are pulled by an implanting holder to further drive the front side plate, the upper side plate, the front sliding plate, the lower sliding plate, the rear sliding plate, the upper sliding plate, the rear side plate and the lower sliding plate to move back and forth and up and down respectively along a sliding boss 5 and a sliding groove 6 to realize contracting and unfolding, the opening force of the interbody fusion device is utilized to recover the height and tension of the vertebral segment, the compression is removed, and the physiological curvature of the vertebral column is recovered, the interbody fusion cage has the advantages of osseous fusion, guarantee of stable four-way expansion of the spine and the like.

Claims

1. An intervertebral fusion device which is unfolded in four directions is characterized in that the intervertebral fusion device consists of a four-direction unfolding fusion mechanism and a driving unfolding mechanism,

2. The intervertebral fusion cage of claim 1, wherein the intervertebral fusion cage is driven by an implant holder to expand in four directions, the implant holder is composed of a handle, a traction rod, a push rod and a push knob, the push rod is tubular, the right end of the handle is connected with the traction rod, the left end of the traction rod is provided with a pull thread matched with the left traction block, the right end of the traction rod is provided with a push thread, the push knob is sleeved outside the push thread and connected with the traction rod through a thread, the left end of the push knob is connected with the push rod sleeved outside the traction rod, and the distance between the left traction block and the right push block is realized by rotating the push knob to reduce the distance between the left end of the push rod and the left end of the traction rod.

3. The four-way expanding intervertebral fusion device as claimed in claim 2, wherein the diameter of the push rod is larger than that of the push through hole of the right push block, so that the push rod is interfered with the side of the push block to push.

4. The intervertebral fusion cage of claim 2, wherein the right end of the push rod is rotatably connected to the left end of the push knob through a rotation mechanism, and the rotation mechanism is a bearing or an annular groove connected to an annular boss fitting structure.

5. The four-way unfolding interbody fusion cage according to claim 1, wherein the left pulling portion of the left pulling block has two anti-slip limiting protrusions on its top and bottom surfaces, the top plate, top sliding plate, bottom plate and bottom sliding plate corresponding to the left pulling block have two anti-slip limiting grooves, the left pulling block is clamped in the four-way unfolding fusion mechanism by the cooperation of the two anti-slip limiting protrusions and the two anti-slip limiting grooves, the right pushing block has two anti-slip limiting protrusions on its top and bottom surfaces, the top plate, top sliding plate, bottom plate and bottom sliding plate corresponding to the right pushing block have two anti-slip limiting grooves, and the pushing block is clamped in the four-way unfolding fusion mechanism by the cooperation of the two anti-slip limiting protrusions and the two anti-slip limiting grooves.

6. The intervertebral fusion cage of claim 1, wherein the right side of the two upper and lower anti-dropping limit protrusions of the right propulsion part of the right propulsion block is provided with a blocking boss, the blocking boss above the right propulsion part is arranged at the front end of the right propulsion part of the right propulsion block, the blocking boss below the right propulsion part is arranged at the rear end of the right propulsion block, the upper side plate and the lower side plate are respectively provided with a blocking chute matched with the blocking boss, and the fixed right propulsion block is prevented from moving left and right by the blocking boss.

7. The intervertebral fusion cage of claim 1, wherein the anterior plate, the superior plate, the anterior sliding plate, the inferior sliding plate, the posterior sliding plate, the superior sliding plate, the posterior plate and the inferior plate are respectively provided with plant holes for bone fusion materials to enter, thereby facilitating the intervertebral fusion cage to be fused with the intervertebral bones.

8. The intervertebral fusion cage of claim 1, wherein the upper plate, the lower plate, the upper plate and the lower plate are respectively provided with a saw-toothed boss to ensure the stability of the fixation between the upper plate, the lower plate, the upper plate and the lower plate and the intervertebral space and prevent slipping.

9. The intervertebral fusion cage of claim 1, wherein the sliding protrusion and groove, the blocking protrusion and the blocking sliding groove are respectively configured as an i-shape, a cylinder, a trapezoid, a dovetail, a rectangle, an arc, or a polygon that are engaged with each other.

10. The four-way expanding intervertebral fusion device according to claim 5, wherein the anti-separation limit protrusion and the anti-separation limit groove are respectively configured as a pawl or an arc protrusion.