CN111671554B

CN111671554B - Cervical vertebra minimally invasive expansion type intervertebral fusion system

Info

Publication number: CN111671554B
Application number: CN202010455388.XA
Authority: CN
Inventors: 蒋晓丰; 贾爱红
Original assignee: Changzhou Geasure Medical Devices Co ltd
Current assignee: Changzhou Geasure Medical Devices Co ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-12-22
Anticipated expiration: 2040-05-26
Also published as: CN111671554A

Abstract

The invention discloses a minimally invasive cervical vertebra expansion type interbody fusion system, which comprises a supporting plate frame, an interbody fusion cage and a supporting rod, wherein a strip-shaped notch for the interbody fusion cage to pass through is formed in the central position of the supporting plate frame, the top of the interbody fusion cage is connected with the supporting rod through a connecting sleeve, the supporting plate frame is vertically erected through a first vertical plate and a second vertical plate on two sides, so that the supporting plate frame can be used as a supporting platform in the cervical vertebra treatment process and is convenient to treat, a left supporting plate and a right supporting plate are inserted into a skin incision, a screw drives a first nut seat to move leftwards along the horizontal direction by rotating a first rotating wheel anticlockwise, so that the first nut seat drives the left supporting plate to prop the skin incision to the left side, the second screw drives the second nut seat to move rightwards along the horizontal direction by rotating the second rotating wheel clockwise, so that the second nut seat drives, the treatment operation of the interbody fusion cage is convenient through the strutting action of the left supporting plate and the right supporting plate on the skin incision.

Description

Cervical vertebra minimally invasive expansion type intervertebral fusion system

Technical Field

The invention belongs to the technical field of interbody fusion devices, and particularly relates to a minimally invasive cervical vertebra expanding interbody fusion system.

Background

Cervical spondylosis is the leading cause of neck pain (NeckPain), and Cervical Spondylosis (CS) particularly refers to a series of clinical symptoms and signs caused by the compression of structures such as spinal cord, nerves, blood vessels, etc. due to degenerative changes of cervical intervertebral disc and degeneration of secondary intervertebral joints thereof. With the aging population and the increasing number of 'lower head' population, the prevalence rate of CS rises sharply, becoming a global public health hotspot problem. Conservative treatment is preferred for the disease, and surgical treatment is considered when the conservative treatment is ineffective. However, the traditional open surgery therapy has the defects of large trauma, long time, much bleeding, many complications and the like, and the trend of the current surgery therapy is limited, precise and minimally invasive.

For example, patent application No. 201620882381.5 discloses a cervical fusion cage. The cervical vertebra fusion cage is composed of a first fusion cage body and a second fusion cage body in an assembled mode, a bone grafting hole is formed in the center of the cervical vertebra fusion cage, a positioning needle is arranged in the bone grafting hole, anti-skidding blocks are further arranged on the upper surface and the lower surface of the cervical vertebra fusion cage, and auxiliary positioning holes are further formed in the two sides of the bone grafting hole. The utility model discloses a cervical vertebra fuses ware comprises 2 pieces of integration ware body assemblies, can finely tune the property and the size of fusing the ware according to actual need, adapts to actual need more, is equipped with 2 auxiliary positioning holes for combine more firmly between integration ware and the bone, set up the pilot pin, make the bone mass of implanting control easily, and implant smoothly. The utility model discloses a fuse ware can satisfy the demand at cervical vertebra position to a certain extent, but current interbody fuse ware has following not enough in the use:

1. the existing interbody fusion cage is not provided with a supporting device for a skin incision of a patient in the using process, so that the interbody fusion cage needs to support the skin incision of the patient through external equipment in the using process, and the interbody fusion cage is inconvenient to use

2. The existing interbody fusion cage is unstable in fixation of the cervical vertebra of a patient in the using process, and the size of the interbody fusion cage is difficult to adjust, so that the interbody fusion cage is easy to deviate, extrude and the like on the cervical vertebra of the patient;

3. the existing interbody fusion cage is inconvenient to operate in the treatment process, and the treatment difficulty of the interbody fusion cage on patients is increased.

Disclosure of Invention

The invention aims to provide a cervical vertebra minimally invasive expansion type intervertebral fusion system to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a minimally invasive cervical vertebra expansion type interbody fusion system comprises a supporting plate frame, an interbody fusion cage and supporting rods, wherein a strip-shaped notch for the interbody fusion cage to pass through is formed in the center of the supporting plate frame, and the top of the interbody fusion cage is connected with the supporting rods through connecting sleeves;

the bottom surface of the support plate frame is positioned on two sides of the strip-shaped groove opening and is respectively and vertically provided with a first vertical plate, a second vertical plate and a second vertical plate, the first vertical plate, the second vertical plate and the second vertical plate are completely consistent in structure and are symmetrical about an axis in the vertical direction of the support plate frame, a first screw rod is horizontally arranged between the first vertical plate and the first vertical plate, one end of the first screw rod, which is connected with the first vertical plate, penetrates through the vertical plate and is connected with a first rotating wheel, the first screw rod is connected with a first nut seat through threads, the bottom surface of the support plate frame is positioned right above the first screw rod and is provided with a first sliding groove in the horizontal direction, the top surface of the first nut seat is provided with a sliding block matched with the first sliding groove, the first nut seat is slidably connected in the first sliding groove, a left supporting plate in an L-shaped structure is fixedly arranged on the bottom surface of the T-shaped block;

the interbody fusion cage comprises a left expansion plate and a right expansion plate, wherein fixed blocks are respectively arranged on the longitudinal two sides of the two ends of the bottom surface of the left expansion plate and the longitudinal two sides of the two ends of the surface of the right expansion plate, lifting plates are respectively and rotatably connected on the outer side surfaces of the fixed blocks, a first strip-shaped block, a first moving block, a second strip-shaped block and a second moving block are horizontally arranged between the left expansion plate and the right expansion plate, the first strip-shaped block is fixedly connected with the first moving block through a second guide rail rod, the second strip-shaped block is fixedly connected with the second moving block through the first guide rail rod, the second guide rail rod penetrates through the first moving block and abuts against the side surface of the second strip-shaped block, the first moving block, the second strip-shaped block and the second moving block are rotatably connected with lifting plates on the outer side surfaces, and a quadrilateral structure connected end to end is formed between the four lifting plates on, the threaded through holes are formed in the first strip-shaped block, the first moving block, the second strip-shaped block and the second moving block in the horizontal direction, a third threaded rod is connected in the threaded holes of the first strip-shaped block, the first moving block, the second strip-shaped block and the second moving block through threads, a limiting block is fixedly arranged in the middle of the third threaded rod, namely the threads at the two ends of the threads between the first strip-shaped block and the first moving block are opposite in screwing direction, the threads at the two ends of the threads between the second strip-shaped block and the second moving block are opposite in screwing direction, and a turntable is fixedly connected to the top end of the third threaded rod.

As a further scheme of the invention: the horizontal screw rod two that is provided with between riser two and the riser two, the one end that riser two is connected to screw rod two runs through riser two and is connected with runner two, there is nut seat two on the screw rod two through threaded connection, spout two has been seted up along the horizontal direction directly over the bottom surface that supports the grillage is located screw rod two, be provided with the slider with spout two phase adaptation on the top surface of nut seat two, nut seat two passes through slider sliding connection in spout two that supports the grillage bottom surface, T type groove has also been seted up along longitudinal direction to the bottom surface of nut seat two, sliding connection has T type piece in the T type groove, fixed setting is the right fagging of L type structure on the bottom surface of T type piece, the axis symmetry on the vertical board of left fagging and right fagging is about supporting vertical direction.

As a still further scheme of the invention: the connecting sleeve bottom surface has seted up the through-hole in vertical direction, and has seted up in the through-hole and supply carousel pivoted ring channel one, screw rod three rotates through the carousel and connects in connecting sleeve's ring channel one, the through-hole has been seted up to the connecting sleeve top surface in vertical direction, and sets up and C type draw-in groove in the inside bilateral symmetry of through-hole.

As a still further scheme of the invention: the utility model discloses a bracing piece, including bracing piece, disc, spring, connecting sleeve, the bracing piece is the cylinder cavity structure of both ends uncovered, the inside supporting shoe that is the loop configuration that is provided with a plurality of pieces of cylinder cavity of bracing piece, the through-hole that supplies the rotary rod to pass is seted up to the supporting shoe in vertical direction, the rotary rod is located the fixed annular piece that is provided with of the one end of the inside bottom of bracing piece, and rotates on the annular piece and be connected with the disc, and sets up the ring channel two that supplies the annular piece to erect on the medial surface of disc, the lateral surface both ends symmetry of disc is provided with the spring, the other end of spring be connected with.

As a still further scheme of the invention: the bottom setting of bracing piece is run through to the bottom of rotary rod, and has seted up the cross fixture block on rotary rod bottom end face.

As a still further scheme of the invention: the surface of the turntable is provided with a cross-shaped clamping groove for the rotation of the cross-shaped clamping block.

As a still further scheme of the invention: the bottom surfaces of the first vertical plate and the second vertical plate are provided with arc-shaped cushion blocks, the arc-shaped cushion blocks are made of silica gel materials, and the bottom surfaces of the arc-shaped cushion blocks are of crescent structures.

As a still further scheme of the invention: the left supporting plate and the right supporting plate are symmetrical on the bottom surface of the supporting plate frame about the axis in the vertical direction of the supporting plate frame, threaded through holes are formed in the side surfaces of the first nut seat and the second nut seat, locking screws are connected into the threaded through holes through threads, and the tail ends of the locking screws are abutted against the side surfaces of T-shaped blocks in the T-shaped grooves.

As a still further scheme of the invention: and chamfer spines are arranged on the outer surfaces of the left expansion plate and the right expansion plate.

As a still further scheme of the invention: the support plate frame is erected through a first vertical plate and a second vertical plate on two sides, a left support plate and a right support plate are inserted into a skin incision, a first rotating wheel is rotated anticlockwise, a screw drives a first nut seat to move leftwards along the horizontal direction, so that the first nut seat drives the left support plate to prop open the skin incision towards the left side, and the second rotating wheel is rotated clockwise, so that the second screw drives a second nut seat to move rightwards along the horizontal direction, so that the second nut seat drives the right support plate to prop open the skin incision towards the right side, and the insertion of the interbody fusion cage is facilitated through the propping effect of the left support plate and the right support plate on the skin incision;

clamping the clamping beads on the two sides of the bottom of the supporting rod into the C-shaped clamping grooves in the connecting sleeve, namely inserting the interbody fusion cage between two adjacent vertebrae through the strip-shaped notches in the supporting plate frame under the action of the supporting rod, and enabling the rotating rod to drive the screw rod III to rotate through the rotating disc by rotating the rotating rod, so that the strip-shaped block I and the moving block I on the two sides of the limiting block move in opposite directions, and the strip-shaped block II and the moving block II move in opposite directions, thereby realizing that the strip-shaped block I, the moving block I, the strip-shaped block II and the moving block II respectively drive the lifting plates on the two sides to move, and realizing that the left expansion plate and the right expansion plate are;

after the intervertebral fusion cage is fixed, the rotary rod is pulled to drive the disc to pull out the clamping beads through the C-shaped clamping groove in the connecting sleeve by the spring, and the supporting rod is separated from the connecting sleeve, so that the fixation of the whole intervertebral fusion cage is completed.

Compared with the prior art, the invention has the beneficial effects that:

1. the minimally invasive cervical vertebra expansion type interbody fusion cage is provided with the support plate frame, the support plate frame is vertically erected through the vertical plate I and the vertical plate II on two sides, the support plate frame can be used as a support platform in the treatment process of cervical vertebra and is convenient to treat, the left support plate and the right support plate are inserted into the skin incision, the screw drives the nut seat I to move leftwards along the horizontal direction by rotating the rotating wheel I anticlockwise, so that the nut seat I drives the left support plate to prop open the skin incision to the left side, the screw drives the nut seat II to move rightwards along the horizontal direction by rotating the rotating wheel II clockwise, so that the nut seat II drives the right support plate to prop open the skin incision to the right side, and the treatment operation of the interbody fusion cage is facilitated through the propping effect of the left support plate and the right support plate on the skin;

2. the left supporting plate and the right supporting plate are respectively connected to the T-shaped grooves of the first nut seat and the second nut seat in a sliding mode through T-shaped blocks, so that the left supporting plate and the right supporting plate are quickly disassembled and assembled, the specifications of the left supporting plate and the right supporting plate are changed and quickly sterilized, and the interbody fusion cage is high in practicability;

3. clamping the clamping balls on two sides of the bottom of the supporting rod into the C-shaped clamping grooves in the connecting sleeve, namely inserting the interbody fusion cage between two adjacent vertebrae through the strip-shaped notches in the supporting plate frame under the action of the supporting rod, and rotating the rotating rod to enable the rotating rod to drive the screw rod III to rotate through the rotary disc, so that the strip-shaped block I and the moving block I on the two sides of the limiting block move in opposite directions, and the strip-shaped block II and the moving block II move in opposite directions, thereby realizing that the strip-shaped block I, the moving block I, the strip-shaped block II and the moving block II respectively drive the lifting plates on the two sides to move, realizing that the left expansion plate and the right expansion plate are clamped and fixed in the gap between the two vertebrae, facilitating the use of the interbody fusion cage, and enabling the fixation of the interbody fusion cage to be;

4. after the interbody fusion cage is fixed, through the pulling rotary rod, make the rotary rod drive the disc and pull out the card pearl through the inside C type draw-in groove of connecting sleeve through the spring, the separation of bracing piece and connecting sleeve accomplishes whole interbody fusion cage's fixed promptly, makes interbody fusion cage's maneuverability.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a front structural schematic view of a minimally invasive cervical spine expansion type intervertebral fusion system.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a perspective view of an intervertebral cage in a minimally invasive cervical spine expansion type intervertebral fusion system.

Fig. 4 is a schematic view of the internal structure of an intervertebral cage in a minimally invasive cervical spine expansion type intervertebral fusion system.

Fig. 5 is a front view of an intervertebral cage in a minimally invasive cervical spine expansion type intervertebral fusion system.

Fig. 6 is a structural schematic view of a connecting sleeve in a minimally invasive cervical spine expansion type intervertebral fusion system.

Fig. 7 is a structural schematic view of a support plate frame in a minimally invasive cervical spine expansion type intervertebral fusion system.

Fig. 8 is a structural schematic view of a first vertical plate in a minimally invasive cervical spine expansion type intervertebral fusion system.

Fig. 9 is a schematic structural view of a support rod in a minimally invasive cervical spine expansion type intervertebral fusion system.

Fig. 10 is an enlarged view of fig. 9 at B.

In the figure: the device comprises a supporting plate frame 1, a strip-shaped notch 101, a first sliding groove 102, a first vertical plate 103, a first screw 104, a first nut seat 105, a first rotating wheel 106, a first vertical plate 107, an arc-shaped cushion block 108, a second sliding groove 109, a second vertical plate 110, a second screw 111, a second nut seat 112, a second vertical plate 113, a second rotating wheel 114, a left support plate 115, a right support plate 116, a T-shaped groove 117, a T-shaped block 118, a locking screw 119, an interbody fusion cage 2, a left expansion plate 201, a right expansion plate 202, a chamfer thorn 203, a lifting plate 204, a fixed block 205, a first strip-shaped block 206, a first moving block 207, a second strip-shaped block 208, a second moving block 209, a first guide rail rod 210, a third screw 211, a rotary table 212, a second guide rail rod 213, a connecting sleeve 3, a first annular groove 301, an inner hole 302, a C-shaped clamping groove 303, a supporting rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 10, in an embodiment of the present invention, a minimally invasive cervical spine expansion type interbody fusion system includes a support plate frame 1, an interbody fusion cage 2 and a support rod 4, a bar-shaped notch 101 for the interbody fusion cage 2 to pass through is formed in a central position of the support plate frame 1, and the top of the interbody fusion cage 2 is connected to the support rod 4 through a connecting sleeve 3, so that the whole minimally invasive cervical spine expansion type interbody fusion cage is more convenient to assemble and disassemble, and has higher practicability.

A first vertical plate 103, a first vertical plate 107, a second vertical plate 110 and a second vertical plate 113 are respectively vertically arranged on two sides of the strip-shaped notch 101 on the bottom surface of the support plate frame 1, the first vertical plate 103, the first vertical plate 107, the second vertical plate 110 and the second vertical plate 113 have completely identical structures and are symmetrical about an axis in the vertical direction of the support plate frame 1, a first screw 104 is horizontally arranged between the first vertical plate 103 and the first vertical plate 107, one end of the first screw 104, which is connected with the first vertical plate 107, is connected with a first rotating wheel 106 through the first vertical plate 107, a first nut seat 105 is connected on the first screw 104 through a thread, a first sliding groove 102 is arranged along the horizontal direction above the first screw 104 on the bottom surface of the support plate frame 1, a sliding block matched with the first sliding groove 102 is arranged on the top surface of the first nut seat 105, the first nut seat 105 is slidably connected in the first sliding groove 102 on the bottom surface of the support plate, a T-shaped block 118 is connected in the T-shaped groove 117 in a sliding manner, a left supporting plate 115 in an L-shaped structure is fixedly arranged on the bottom surface of the T-shaped block 118, a screw rod II 111 is horizontally arranged between the vertical plate II 110 and the vertical plate II 113, one end of the screw rod II 111 connected with the vertical plate II 113 penetrates through the vertical plate II 113 and is connected with a rotating wheel II 114, a nut seat II 112 is connected on the screw rod II 111 through threads, a sliding groove II 109 is formed in the bottom surface of the supporting plate frame 1 right above the screw rod II 112 along the horizontal direction, a sliding block matched with the sliding groove II 109 is arranged on the top surface of the nut seat II 112, the nut seat II 112 is connected in the sliding groove II 109 on the bottom surface of the supporting plate frame 1 through the sliding block, a T-shaped groove 117 is also formed in the bottom surface of the nut seat II 112 along the longitudinal direction, the T-shaped groove 117 is connected with the T-shaped block, the vertical plates of the left supporting plate 115 and the right supporting plate 116 are symmetrical about the axis of the supporting plate frame 1 in the vertical direction, the supporting plate frame 1 is vertically erected through the first vertical plate 107 and the second vertical plate 113 at the two sides, so that the supporting plate frame 1 can be used as a supporting platform in the cervical vertebra treatment process, the treatment is convenient, the left supporting plate 115 and the right supporting plate 116 are inserted into the skin incision, by rotating the first rotating wheel 106 counterclockwise, the first screw 104 drives the first nut seat 105 to move leftward along the horizontal direction, so that the first nut seat 105 drives the left supporting plate 115 to open the skin incision to the left, the second screw 111 drives the second nut seat 112 to move rightwards along the horizontal direction by clockwise rotating the second rotating wheel 114, thereby, the second nut seat 112 drives the right supporting plate 116 to prop open the skin incision to the right side, and the treatment operation of the interbody fusion cage 2 is facilitated through the propping action of the left supporting plate 115 and the right supporting plate 116 on the skin incision.

The interbody fusion cage 2 comprises a left expansion plate 201 and a right expansion plate 202, wherein the longitudinal two sides of the two ends of the bottom surface of the left expansion plate 201 and the longitudinal two sides of the two ends of the surface of the right expansion plate 202 are respectively provided with a fixed block 205, the outer side surface of the fixed block 205 is respectively connected with a lifting plate 204 in a rotating manner, a first strip-shaped block 206, a first moving block 207, a second strip-shaped block 208 and a second moving block 209 are horizontally arranged between the left expansion plate 201 and the right expansion plate 202, the first strip-shaped block 206 and the first moving block 207 are fixedly connected through a second guide rail rod 213, the second strip-shaped block 208 and the second moving block 209 are fixedly connected through a first guide rail rod 210, the second guide rail rod 213 penetrates through the first moving block 207 and abuts against the side surface of the second strip-shaped block 208, the first strip-shaped block 206, the first moving block 207, the second strip-shaped block 208 and the second moving block 209 are rotatably connected with the lifting plate, four lifting plates 204 on two sides of the left expansion plate 201 and the right expansion plate 202 form an end-to-end quadrilateral structure, threaded through holes are formed in the threaded through holes of the first strip-shaped block 206, the first moving block 207, the second strip-shaped block 208 and the second moving block 209 in the horizontal direction, a third screw 211 is connected in the threaded through holes of the first strip-shaped block 206, the first moving block 207, the second strip-shaped block 208 and the second moving block 209 through threads, a limit block is fixedly arranged at the middle position of the third screw 211, namely the threads at two ends of the threads between the first strip-shaped block 206 and the first moving block 207 of the third screw 211 are opposite in screwing direction, the threads at two ends of the threads between the second strip-shaped block 208 and the second moving block 209 of the third screw 211 are opposite in screwing direction, a rotary disc 212 is fixedly connected to the top end of the third screw 211, clamping beads 406 on two sides of the bottom of the support rod 4 are clamped into a C-shaped clamping groove 303 in the connecting sleeve 3, namely the Between two adjacent vertebrae, and through rotating rotary rod 401, make rotary rod 401 drive screw rod three 211 through carousel 212 and rotate, bar piece one 206 and movable block one 207 that make screw rod three 211 be located the stopper both sides move in opposite directions, bar piece two 207 and movable block two 209 move in opposite directions, thereby realize bar piece one 206 and movable block one 207 and bar piece two 207 and movable block two 209 drive both sides lifter plate 204 respectively and move, realize that left expansion plate 201 and right expansion plate 202 carry out the chucking fixed in two intervertebral clearances, make interbody fusion cage 2's use more convenient, and make interbody fusion cage 2's fixed more firm through chamfer thorn 203 on left expansion plate 201 and the right expansion plate 202.

The bottom surface of the connecting sleeve 3 is provided with a through hole in the vertical direction, a first annular groove 301 for rotating the rotary disc 212 is formed in the through hole, the screw rod three 211 is rotatably connected in the first annular groove 301 of the connecting sleeve 3 through the rotary disc 212, the top surface of the connecting sleeve 3 is provided with a through hole in the vertical direction, the through hole is symmetrically provided with C-shaped clamping grooves 303 at two sides, the supporting rod 4 is a cylindrical cavity structure with two uncovered ends, a plurality of supporting blocks 402 in an annular structure are arranged in the cylindrical cavity of the supporting rod 4, the supporting blocks 402 are provided with through holes for the rotary rod 401 to pass through in the vertical direction, one end of the rotary rod 401 at the bottom in the supporting rod 4 is fixedly provided with an annular block 404, a circular disc 403 is rotatably connected on the annular block 404, and a second annular groove 407 for erecting the annular block 404 is formed on the, the lateral surface both ends symmetry of disc 403 is provided with spring 405, the other end of spring 405 is connected with the card pearl 406 with C type draw-in groove 303 looks adaptation on connecting sleeve 3, bracing piece 4 is in the C type draw-in groove 303 of connecting sleeve 3 through the card pearl 406 joint of both sides, after intervertebral fusion ware 2 is fixed to finish, through spur rotary rod 401, make rotary rod 401 drive disc 403 pull out in the C type draw-in groove 303 of connecting sleeve 3 internal portion through spring 405 with card pearl 406, bracing piece 4 and connecting sleeve 3's separation, accomplish whole intervertebral fusion ware 2's fixing promptly, make intervertebral fusion ware 2's maneuverability.

The bottom setting of bracing piece 4 is run through to the bottom of rotary rod 401, and has seted up the cross fixture block on rotary rod 401 bottom end face, is convenient for rotate rotary rod 401.

The surface of the rotating disc 212 is provided with a cross-shaped clamping groove for the rotation of the cross-shaped clamping block.

Arc cushion blocks 108 are arranged on the bottom surfaces of the first vertical plate 107 and the second vertical plate 113, the arc cushion blocks 108 are made of silica gel materials, and the bottom surfaces of the arc cushion blocks 108 are of crescent structures, so that the support plate frame 1 is more appropriate for a patient.

The left supporting plate 115 and the right supporting plate 116 are symmetrical on the bottom surface of the supporting plate frame 1 about the axis of the supporting plate frame 1 in the vertical direction, threaded through holes are formed in the side surfaces of the first nut seat 105 and the second nut seat 112, locking screws 119 are connected in the threaded through holes through threads, the tail ends of the locking screws 119 abut against the side surfaces of T-shaped blocks 118 in T-shaped grooves 117, and the left supporting plate 115 and the right supporting plate 116 are fixed.

The chamfer spines 203 are arranged on the outer surfaces of the left expansion plate 201 and the right expansion plate 202, so that the left expansion plate 201 and the right expansion plate 202 are fixed more firmly between the cervical vertebrae.

The working principle is as follows: the support plate frame 1 is erected through the vertical plate I107 and the vertical plate II 113 on two sides, the left support plate 115 and the right support plate 116 are inserted into the skin incision, the screw rod I104 drives the nut seat I105 to move leftwards along the horizontal direction by rotating the rotating wheel I106 anticlockwise, so that the nut seat I105 drives the left support plate 115 to prop open the skin incision to the left side, the screw rod II 111 drives the nut seat II 112 to move rightwards along the horizontal direction by rotating the rotating wheel II 114 clockwise, so that the nut seat II 112 drives the right support plate 116 to prop open the skin incision to the right side, the insertion of the interbody fusion cage 2 is facilitated through the propping action of the left support plate 115 and the right support plate 116, the clamping beads 406 on two sides of the bottom of the support rod 4 are clamped into the C-shaped clamping grooves 303 in the connecting sleeve 3, namely, the interbody fusion cage 2 is inserted between two adjacent vertebrae through the strip-shaped notches 101 on the support plate frame, and by rotating the rotating rod 401, the rotating rod 401 drives the screw rod three 211 to rotate through the turntable 212, the bar-shaped block one 206 and the moving block one 207 on two sides of the screw rod three 211 move in opposite directions, and the bar-shaped block two 207 and the moving block two 209 move in opposite directions, so that the bar-shaped block one 206, the moving block one 207, the bar-shaped block two 207 and the moving block two 209 respectively drive the lifting plates 204 on two sides to move, the left expansion plate 201 and the right expansion plate 202 are clamped and fixed in two intervertebral gaps, after the intervertebral fusion device 2 is fixed, the rotating rod 401 is pulled, the rotating rod 401 drives the disc 403 to pull out the clamping balls 406 through the spring 405 from the C-shaped clamping groove 303 in the connecting sleeve 3, and the supporting rod 4 is separated from the connecting sleeve 3, so that the fixing of the whole intervertebral fusion device 2 is completed.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. A minimally invasive cervical spine expansion type intervertebral fusion system is characterized in that: the intervertebral fusion cage comprises a supporting plate frame (1), an intervertebral fusion device (2) and a supporting rod (4), wherein a strip-shaped notch (101) for the intervertebral fusion device (2) to pass through is formed in the center of the supporting plate frame (1), and the top of the intervertebral fusion device (2) is connected with the supporting rod (4) through a connecting sleeve (3);

the bottom surface of the support plate frame (1) is positioned on two sides of the strip-shaped notch (101) and is respectively and vertically provided with a first vertical plate (103), a first vertical plate (107), a second vertical plate (110) and a second vertical plate (113), the structures of the first vertical plate (103) and the first vertical plate (107) are completely consistent with those of the second vertical plate (110) and the second vertical plate (113) and are symmetrical about an axis of the support plate frame (1) in the vertical direction, a first screw (104) is horizontally arranged between the first vertical plate (103) and the first vertical plate (107), one end of the first screw (104) connected with the first vertical plate (107) penetrates through the first vertical plate (107) and is connected with a first rotating wheel (106), a first nut seat (105) is connected onto the first screw (104) through threads, a first sliding groove (102) is formed in the horizontal direction above the first screw (104) on the bottom surface of the support plate frame (1), and a sliding block matched with the first, the nut seat I (105) is connected in a sliding groove I (102) on the bottom surface of the support plate frame (1) in a sliding mode through a sliding block, a T-shaped groove (117) is formed in the bottom surface of the nut seat I (105) along the longitudinal direction, a T-shaped block (118) is connected in the T-shaped groove (117) in a sliding mode, and a left support plate (115) in an L-shaped structure is fixedly arranged on the bottom surface of the T-shaped block (118);

the interbody fusion cage (2) comprises a left expansion plate (201) and a right expansion plate (202), wherein fixed blocks (205) are respectively arranged on the two longitudinal sides of the two ends of the bottom surface of the left expansion plate (201) and the two longitudinal sides of the two ends of the surface of the right expansion plate (202), a lifting plate (204) is respectively connected onto the outer side surface of each fixed block (205) in a rotating manner, a first strip-shaped block (206), a first moving block (207), a second strip-shaped block (208) and a second moving block (209) are horizontally arranged between the left expansion plate (201) and the right expansion plate (202), the first strip-shaped block (206) and the first moving block (207) are fixedly connected through a second guide rail rod (213), the second strip-shaped block (208) and the second moving block (209) are fixedly connected through a first guide rail rod (210), the second guide rail rod (213) penetrates through the first moving block (207) and abuts against the side surface of the second strip-shaped block (208), and the first guide rail rod (210) penetrates through the second strip, lifting plates (204) are rotatably connected to the outer side surfaces of the first strip-shaped block (206), the first moving block (207), the second strip-shaped block (208) and the second moving block (209), four lifting plates (204) on the two sides of the left expansion plate (201) and the right expansion plate (202) form an end-to-end quadrilateral structure, threaded through holes are formed in the horizontal direction of the first strip-shaped block (206), the first moving block (207), the second strip-shaped block (208) and the second moving block (209), a third screw rod (211) is connected in the threaded holes of the first strip-shaped block (206), the first moving block (207), the second strip-shaped block (208) and the second moving block (209) through threads, a limiting block is fixedly arranged at the middle position of the third screw rod (211), namely the threads at the two ends of the threads between the first strip-shaped block (206) and the first moving block (207) are opposite in rotation direction, and the threads at the two ends of the third screw rod (211) between the second strip-shaped block (208) and the thread turning directions are opposite, and the top end of the screw rod III (211) is fixedly connected with a rotary disc (212);

a second screw rod (111) is horizontally arranged between the second vertical plate (110) and the second vertical plate (113), one end of the second screw rod (111) connected with the second vertical plate (113) penetrates through the second vertical plate (113) to be connected with a second rotating wheel (114), the second screw rod (111) is connected with a second nut seat (112) through threads, a second sliding groove (109) is formed in the bottom surface of the supporting plate frame (1) and is positioned right above the second screw rod (112) along the horizontal direction, a sliding block matched with the second sliding groove (109) is arranged on the top surface of the second nut seat (112), the second nut seat (112) is connected into the second sliding groove (109) in the bottom surface of the supporting plate frame (1) through the sliding block in a sliding manner, a T-shaped groove (117) is also formed in the bottom surface of the second nut seat (112) along the longitudinal direction, a T-shaped block (118) is connected in the T-shaped groove (117) in a sliding manner, and a right, the vertical plates of the left supporting plate (115) and the right supporting plate (116) are symmetrical about an axis in the vertical direction of the supporting plate frame (1);

the bottom surface of the connecting sleeve (3) is provided with a through hole in the vertical direction, a first annular groove (301) for the rotating disc (212) to rotate is formed in the through hole, the screw rod III (211) is rotatably connected in the first annular groove (301) of the connecting sleeve (3) through the rotating disc (212), the top surface of the connecting sleeve (3) is provided with the through hole in the vertical direction, and the C-shaped clamping grooves (303) are symmetrically formed in the two sides of the inside of the through hole;

the supporting rod (4) is of a cylindrical cavity structure with two uncovered ends, a plurality of supporting blocks (402) in an annular structure are arranged in the cylindrical cavity of the supporting rod (4), the supporting block (402) is provided with a through hole for the rotating rod (401) to pass through in the vertical direction, one end of the rotating rod (401) positioned at the bottom inside the supporting rod (4) is fixedly provided with an annular block (404), a disc (403) is rotatably connected on the annular block (404), a second annular groove (407) for erecting the annular block (404) is arranged on the inner side surface of the disc (403), springs (405) are symmetrically arranged at two ends of the outer side surface of the disc (403), clamping beads (406) matched with the C-shaped clamping grooves (303) on the connecting sleeve (3) are connected to the other ends of the springs (405), the support rod (4) is clamped in the C-shaped clamping groove (303) of the connecting sleeve (3) through clamping beads (406) on two sides.

2. The minimally invasive cervical spine expansion type intervertebral fusion system according to claim 1, wherein the bottom of the rotating rod (401) penetrates the bottom of the supporting rod (4), and a cross-shaped fixture block is arranged on the end surface of the bottom end of the rotating rod (401).

3. The minimally invasive cervical spine expansion type intervertebral fusion system according to claim 1, wherein a cross-shaped clamping groove for rotating the cross-shaped clamping block is formed on the surface of the rotating disc (212).

4. The minimally invasive cervical spine expansion type intervertebral fusion system according to claim 1, wherein the bottom surfaces of the first vertical plate (107) and the second vertical plate (113) are provided with arc-shaped cushion blocks (108), the arc-shaped cushion blocks (108) are made of silica gel materials, and the bottom surfaces of the arc-shaped cushion blocks (108) are crescent-shaped structures.

5. The minimally invasive cervical spine expansion type intervertebral fusion system according to claim 1, wherein the left support plate (115) and the right support plate (116) are symmetrical on the bottom surface of the support plate frame (1) about an axis of the support plate frame (1) in the vertical direction, threaded through holes are formed in the side surfaces of the first nut seat (105) and the second nut seat (112), locking screws (119) are connected in the threaded through holes through threads, and the tail ends of the locking screws (119) abut against the side surfaces of T-shaped blocks (118) in the T-shaped grooves (117).

6. The minimally invasive cervical spine expansion type intervertebral fusion system according to claim 1, wherein chamfer spines (203) are arranged on the outer surfaces of the left expansion plate (201) and the right expansion plate (202).