CN113081104A - Intervertebral spreader with adjustable lumbar vertebra pedicle of vertebral arch screw and scale - Google Patents

Abstract

The invention discloses an intervertebral spreader with scales and adjustable by lumbar vertebral pedicle screws, which comprises an adjusting rod, wherein the front end of the adjusting rod is fixedly connected with a fixed arm, the side wall of the adjusting rod is connected with a movable arm in a sliding way, the movable arm and the fixed arm are arranged in parallel, the fixed arm and one end of the movable arm, which is far away from the adjusting rod, are both connected with a sleeve through an adjusting device, the inner part of the sleeve is meshed and sleeved with a lock rod for connecting the vertebral pedicle screws, and a driving mechanism for driving the vertebral pedicle nuts to rotate is arranged in the lock rod. And stability can be improved.

Description

Intervertebral spreader with adjustable lumbar vertebra pedicle of vertebral arch screw and scale

Technical Field

The invention relates to the technical field of intervertebral operation instruments, in particular to an intervertebral spreader with scales and adjustable through lumbar vertebral pedicle screws.

Background

Along with the change of life style of people, the incidence rate of lumbar degenerative diseases is obviously increased, severe lumbar intervertebral disc protrusion, spinal stenosis, lumbar spondylolisthesis, degenerative lumbar lateral curvature and other diseases are usually accompanied by one side or two sides of intervertebral space extremely narrow, in the treatment process, the narrow vertebral canal needs to be enlarged and intervertebral space intervertebral foramen needs to be expanded, so that the clamping pressure of the dural sac and nerve roots is relieved, and the diseases are cured;

traditional intervertebral struts ware is generally including the distraction arm that struts intervertebral space, the ware front end will be strutted during the operation inserts in the tail cap of adjacent pedicle of vertebral arch screw, then hold distracter upper portion hard, strut adjacent centrum in the certain limit, but it is not stable enough to be connected between ordinary distracter front end and the pedicle of vertebral arch screw, the ware that struts easily slips, and the mode that struts of current intervertebral struts ware generally adopts criss-cross mode, can take place to incline between two pedicle of vertebral arch screws after being strutted, cause the centrum of strutting to take place the dislocation, reduce the precision of strutting the centrum, on the other hand struts the ware arm and is straight, occupied lumbar vertebrae operation operating space, block and influenced the operation, therefore we have provided an intervertebral struts ware through adjustable take scale of lumbar vertebrae pedicle of vertebral arch screw.

Disclosure of Invention

The invention aims to provide an intervertebral spreader with scales, which is adjustable through a lumbar vertebral pedicle screw and aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a take intervertebral ware of strutting of scale with adjustable through lumbar vertebrae pedicle of vertebral arch screw, includes the regulation pole, the front end fixedly connected with fixed arm of regulation pole, sliding connection has the carriage release arm on the lateral wall of regulation pole, carriage release arm and fixed arm parallel arrangement, the one end that the regulation pole was kept away from to fixed arm and carriage release arm all is connected with the sleeve through adjusting device, telescopic inside meshing cover has connect the locking lever that is used for connecting the pedicle of vertebral arch screw, telescopic lateral wall and fixedly connected with turning handle are run through to the upper end of locking lever, the inside of locking lever is equipped with and is used for driving pedicle of vertebral arch nut pivoted actuating.

Preferably, the adjusting device comprises a connecting arm, a pin shaft is rotatably connected to the front end of the connecting arm, a butt joint block is meshed and connected to the threaded end of the pin shaft, a T-shaped block is inserted into the side wall of the butt joint block and fixed to the butt joint block through a bolt, and one side of the T-shaped block is fixedly connected to the side wall of the sleeve.

Preferably, the two connecting arms are respectively connected with the fixed arm and the moving arm in a rotating manner.

Preferably, the interior of the adjusting rod is rotatably connected with a screw, one end of the screw penetrates through the side wall of the adjusting rod and is fixedly connected with a driving handle, and one end of the moving arm close to the adjusting rod is meshed and sleeved on the side wall of the screw.

Preferably, the side wall of the adjusting rod is marked with scale marks, and the side wall of the moving arm is fixedly connected with a pointer.

Preferably, actuating mechanism includes the dwang, the inside at the locking lever is connected in the dwang meshing, the upper end of dwang runs through the lateral wall and the fixedly connected with knob of locking lever, just the lower extreme of dwang is inside to have a telescopic link through a spring sliding connection, the lower extreme of telescopic link runs through the lateral wall and the fixedly connected with of dwang and is used for pegging graft at the inside driving head of pedicle of vertebral arch nut, fixedly connected with joint dish on the inner wall of locking lever, fixedly connected with joint pole on the lateral wall of telescopic link, joint pole activity joint is on the last side of joint dish.

Preferably, actuating mechanism includes the dwang, the inside at the locking lever is connected in the dwang meshing, the upper end of dwang runs through the lateral wall and the fixedly connected with knob of locking lever, the lower extreme of dwang is rotated and is connected with the clamp plate, the lower extreme of clamp plate has a plurality of inseparable grafting posts of arranging through second spring coupling.

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

1. according to the invention, the movable arm moves towards one side far away from the fixed arm on the adjusting rod by rotating the screw rod, and when the screw rod stops rotating, the position of the movable arm after moving is fixed, so that after the intervertebral space is expanded, no manual force is required to be applied all the time, the intervertebral space can be kept stable and unchanged in an expanded state, and the operation intensity is reduced;

2. according to the invention, after the locking rod is rotated downwards, the lower end of the locking rod extends out of the sleeve and then is meshed and connected with the threads of the pedicle screw, so that the pedicle screw and the sleeve are stably fixed, the slippage easiness of the contact connection of the traditional distractor and the pedicle screw is avoided, the intervertebral space is effectively distracted, the two sleeves are driven to slide, and at the moment, the locking rod is meshed and connected with the pedicle screw, so that the two pedicle screws are distracted in parallel, namely, the two lumbar vertebrae connected with the pedicle screw are distracted in parallel, the efficiency and the quality of the lumbar vertebra operation are further improved, the operation time is shortened, the operation safety and the success rate are improved, and the pain of a patient is relieved;

3. according to the invention, the connecting arm rotates on the pin shaft, so that the adjusting rod, the fixed arm, the moving arm and other parts rotate to one side, and the operation of the operation is prevented from being influenced, so that a good and wide operation space is provided for intervertebral space operation;

4. according to the invention, the pedicle nut can be driven to rotate in the pedicle screw by rotating the rotating rod, and then the pedicle nut can be directly screwed or unscrewed, so that the convenience of the operation is improved.

Drawings

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

FIG. 2 is a schematic diagram II of an application of the present invention;

FIG. 3 is a schematic view III of an application of the present invention;

FIG. 4 is an exploded view of an application of the present invention;

FIG. 5 is a schematic diagram IV of an application of the present invention;

FIG. 6 is a schematic structural view of the sleeve, the lock lever, the connecting arm, the pin shaft and the T-shaped block of the present invention;

FIG. 7 is an exploded view of the sleeve, connecting arm, pin, T-block and docking block of the present invention;

FIG. 8 is a cross-sectional view of the present invention at the sleeve and locking rod;

FIG. 9 is a cross-sectional exploded view of the sleeve, locking bar, rotating bar, telescoping bar and drive head of the present invention;

FIG. 10 is a cross-sectional view of the locking bar, rotating bar, telescoping bar and drive head of the present invention;

FIG. 11 is a cross-sectional view of the locking bar, telescoping bar and drive head of the present invention;

FIG. 12 is an enlarged view taken at A of FIG. 11 in accordance with the present invention;

FIG. 13 is an exploded view of the adjustment lever, screw, stationary arm and moving arm of the present invention;

FIG. 14 is a schematic view of the sleeve, locking rod and plug post of the present invention;

FIG. 15 is a cross-sectional view I of the sleeve, locking bar, rotating rod, second spring, pressure plate and connecting post of the present invention;

FIG. 16 is a cross-sectional view II of the sleeve, locking bar, rotating rod, second spring, pressing plate and connecting post of the present invention;

FIG. 17 is a cross-sectional exploded view of the rotating lever and pressure plate of the present invention;

FIG. 18 is a cross-sectional view of the sleeve, locking rod, plug post and limiting plate of the present invention.

In the figure: 1. adjusting rod, 2, fixed arm, 3, moving arm, 4, adjusting device, 401, connecting arm, 402, round pin axle, 403, butt joint piece, 404, T type piece, 405, bolt, 5, sleeve, 6, locking lever, 7, screw rod, 8, actuating mechanism, 9, pointer, 10, scale mark, 11, dwang, 12, first spring, 13, telescopic link, 14, driving head, 15, joint disc, 16, joint rod, 17, dog, 18, clamp plate, 19, second spring, 20, plug-in post, 21, spacing dish, 22, turning handle, 23, driving handle, 24, knob.

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.

The first embodiment is as follows:

referring to fig. 1-8 and 13, the present invention provides a technical solution: the utility model provides a take intervertebral ware that scales through adjustable lumbar vertebrae pedicle of vertebral arch screw, includes regulation pole 1, the front end fixedly connected with fixed arm 2 of regulation pole 1, sliding connection has the removal arm 3 on the lateral wall of regulation pole 1, removal arm 3 and fixed arm 2 parallel arrangement, the one end that the regulation pole 1 was kept away from to fixed arm 2 and removal arm 3 all is connected with sleeve 5 through adjusting device 4, the inside meshing cover of sleeve 5 has been cup jointed and is used for connecting the locking lever 6 of pedicle of vertebral arch screw, as shown in figure 4 and 8, rotate locking lever 6 after sleeve 5 aligns with pedicle of vertebral arch screw, locking lever 6 can move down and stretch out outside sleeve 5, and the screw thread of locking lever 6 is identical with the screw thread of pedicle of vertebral arch screw, and the inside of pedicle of vertebral arch screw can be twisted into to the lower extreme of vertebral arch screw of vertebral arch, realize sleeve 5 and the firm connection of pedicle of vertebral arch screw then, the, the rotation of the locking rod 6 is driven by a rotating handle 22 at the upper end of the locking rod 6, when the rotating handle 22 rotates, the locking rod 6 rotates along with the rotating handle 22, and a driving mechanism 8 for driving the rotation of the pedicle screw cap is arranged inside the locking rod 6.

As shown in fig. 1-2, after the sleeve 5 is fixed to the pedicle screw through the locking rod 6, in order to enable the adjusting rod 1, the fixed arm 2 and the movable arm 3 to be arbitrarily turned to two sides for performing the surgical operation (sometimes having a more expanded view, and a doctor may occupy different surgical positions according to the situation in the operation), specifically, the adjusting device 4 includes a connecting arm 401, a pin 402 is rotatably connected to a front end of the connecting arm 401, a butt-joint block 403 is engaged and connected to a threaded end of the pin 402, as shown in fig. 7, one end of the pin 402 is a threaded end, the other end is a butterfly handle, the threaded end of the pin 402 penetrates through an end of the connecting arm 401, and the butt-joint block is fixed to the threaded end, the pin 402 is fixedly mounted on the connecting arm 401, at this time, the connecting arm 401 can rotate on the pin 402, a T-shaped block 404 is inserted on a side wall of the butt, the T-shaped block 404 is fixed on the butt-joint block 403 by a bolt 405, one side of the T-shaped block 404 is fixedly connected to the side wall of the sleeve 5, as shown in fig. 6, after the T-shaped block 404 is inserted into the butt-joint block 403, the T-shaped block is fixed by the bolt 405, and then the sleeve 5 and the connecting arm 401 can be quickly connected.

As shown in fig. 5, in order to change the angles of the adjusting rod 1, the fixed arm 2 and the moving arm 3 to cope with the installation and placement of different body positions and the conditions of different patients in the operation, specifically, the two connecting arms 401 are respectively rotatably connected with the fixed arm 2 and the moving arm 3, after the sleeve 5 is fixed to the pedicle screw through the locking rod 6, the adjusting rod 1, the fixed arm 2 and the moving arm 3 are angularly adjusted around the connecting arms 401, the adjusting rod 1 can be precisely placed, and the adjusting rod 1 and the fixed arm 2 may be opened with mounting holes (not shown in the figure) for connecting with fixing devices such as external brackets, thereby performing the positioning operation.

In order to drive the moving arm 3 to slide on the adjusting rod 1, specifically, a screw 7 is rotatably connected inside the adjusting rod 1, one end of the screw 7 penetrates through the side wall of the adjusting rod 1 and is fixedly connected with a driving handle 23, one end of the moving arm 3 close to the adjusting rod 1 is engaged and sleeved on the side wall of the screw 7, as shown in fig. 3, the driving handle 23 at the end of the screw 7 is rotated, so that the screw 7 can be driven to rotate, and after the screw 7 is rotated, the moving arm 3 slides on the adjusting rod 1 along with the rotation of the screw 7.

In order to make the size of the expanded intervertebral space more accurate, specifically, scale marks 10 are carved on the side wall of the adjusting rod 1, and a pointer 9 is fixedly connected to the side wall of the moving arm 3, as shown in fig. 3, when the moving arm 3 slides on the adjusting rod 1, the pointer 9 slides along with the moving arm 3, and the scale of the pointer 9 pointing to the scale marks 10 at this time represents the size of the expanded intervertebral space, so that the size of the expanded intervertebral space is more accurate.

Example two:

referring to fig. 9-12, on the basis of the first embodiment, in order to realize that the locking rod 6 can drive the pedicle screw cap to rotate on the pedicle screw in the state that the sleeve 5 is connected with the pedicle screw, so as to lock the pedicle screw on the connecting rod, the driving mechanism 8 includes a rotating rod 11, the rotating rod 11 is engaged and connected inside the locking rod 6, the upper end of the rotating rod 11 penetrates through the side wall of the locking rod 6 and is fixedly connected with a knob 24, and the inside of the lower end of the rotating rod 11 is slidably connected with a telescopic rod 13 through a first spring 12, as shown in fig. 9, the upper end of the telescopic rod 13 is fixedly connected with a square block, the added square block can prevent the telescopic rod 13 and the rotating rod 11 from rotating, so that the telescopic rod 13 can drive the rotating rod 11 to rotate, the first spring 12 is in a compressed state, and plays a role of downward spring, the lower end of the telescopic rod 13 penetrates through the side wall of the rotating rod 11 and is fixedly connected with a driving head 14 inserted in the pedicle screw cap, as shown in fig. 11, the shape of the driving head 14 is matched with the size of the driving hole on the upper side of the pedicle screw cap, and the edge part of the lower end of the driving head 14 is chamfered, so that the pedicle screw cap can be conveniently driven by clamping after dislocation, the inner wall of the lock rod 6 is fixedly connected with a clamping disc 15, the side wall of the telescopic rod 13 is fixedly connected with a clamping rod 16, the clamping rod 16 is movably clamped on the upper side surface of the clamping disk 15, as shown in fig. 10, the upper side surface of the clamping disk 15 plays a clamping role on the clamping rod 16, when the pedicle screw cap does not need to be contacted with the connecting rod, the clamping rod 16 is clamped above the clamping disc 15, so that the driving head 14 at the bottom of the telescopic rod 13 cannot be contacted with the pedicle screw cap, and the rotation is avoided;

in addition, a through groove is formed in the clamping disc 15, when the clamping rod 16 rotates along with the telescopic rod 13 and then aligns with the through groove (see fig. 11 and 12), the clamping rod 16 can slide downwards along the through groove, in addition, a stop block 17 is fixedly connected inside the lock rod 6, the telescopic rod 13 is sleeved in the middle of the stop block 17 to play a role in limiting the position of the telescopic rod 13, and the lower end (a driving head 14) of the telescopic rod 13 is prevented from deflecting; in addition, the size of the clamping rod 16 can be designed to be close to the cavity inside the locking rod 6, so that the function of preventing skew can be achieved.

As shown in fig. 10, when the pedicle screw cap is not required to be driven to rotate, the clamping rod 16 is clamped on the upper side surface of the clamping disk 15, the driving head 14 is retracted in the locking rod 6 (the telescopic rod 13 is retracted in the rotating rod 11, so that the first spring 12 is in a compressed state), when the pedicle screw cap needs to be driven to rotate, the rotating rod 11 is rotated, so that the rotating rod 11 drives the telescopic rod 13 to rotate together, after the clamping rod 16 rotates on the clamping disk 15, the clamping rod 16 is aligned with the through groove, the telescopic rod 13 slides downwards through the elasticity of the first spring 12, so that the driving head 14 is propped against the upper side surface of the pedicle nut by the elasticity of the first spring 12, the purpose of the form is that the driving head 14 and the driving hole of the pedicle nut can not be directly matched each time, and the driving head rotates after being extruded by the elasticity of the first spring 12, so that the matching clamping is convenient; the dwang 11 is rotated once more, make behind the drive head 14 and the drive hole of pedicle of vertebral arch nut coincide, the inside in drive hole is inserted to drive head 14, then continue to rotate the dwang 11 after, can realize driving pedicle of vertebral arch nut at pedicle of vertebral arch screw internal rotation to can lock the pedicle of vertebral arch screw on the connective bar, under this state, keep dwang 11 and sleeve 5 static, then rotate locking lever 6, can make locking lever 6 roll out from the inside of pedicle of vertebral arch screw, realize breaking away from of sleeve 5 and pedicle of vertebral arch screw.

And this configuration, after removal, allows the driver head 14 to be manually squeezed and the knob 24 to be rotated to allow the snap rod 16 to pass through the slot and over the snap disk 15 for subsequent use.

Example three:

referring to fig. 14-18, on the basis of the first embodiment, in order to realize that the locking rod 6 can drive the pedicle screw cap to rotate on the pedicle screw in the state that the sleeve 5 is connected with the pedicle screw, so as to lock the pedicle screw on the connecting rod; the driving mechanism 8 comprises a rotating rod 11, the rotating rod 11 is connected inside the locking rod 6 in a meshed manner, the upper end of the rotating rod 11 penetrates through the side wall of the locking rod 6 and is fixedly connected with a knob 24, the lower end of the rotating rod 11 is rotatably connected with a pressing plate 18, the lower end of the pressing plate 18 is connected with a plurality of closely-arranged plug-in posts 20 through second springs 19, the upper end of each second spring 19 is connected to the lower side surface of the corresponding pressing plate 18, the lower end of each second spring 19 is fixedly connected with the corresponding plug-in post 20, as shown in fig. 16, a limiting disc 21 (as shown in fig. 18) is fixedly connected inside the locking rod 6, and the plug-in posts 20 are plugged inside the limiting disc 21, so that the plug-in posts 20;

as shown in fig. 15, when the pedicle screw cap does not need to be driven to rotate, the rotating rod 11 pulls the pressing plate 18, so that the inserting column 20 is retracted inside the locking rod 6, when the pedicle screw cap needs to be driven to rotate, the locking rod 6 is kept still, the rotating rod 11 is rotated, so that the pressing plate 18 is driven to move downwards after the rotating rod 11 moves downwards, the pressing plate 18 pushes the inserting column 20 out of the locking rod 6 through the second spring 19, the lower end of the inserting column 20 is abutted against the upper side surface of the pedicle screw cap, after the rotating rod 11 is continuously rotated, the inserting column 20 positioned right above the pedicle screw cap driving hole slides into the driving hole of the pedicle screw cap, the rest of the inserting column 20 is not moved (the second spring 19 is compressed), and in this state, the rotating rod 6 can drive the limiting plate 21 to rotate the locking rod, thereby driving the pedicle screw cap to rotate in the pedicle screw cap, and locking the pedicle screw cap on, after the pedicle screw cap is screwed up, the rotating rod 11 is rotated upwards, the inserting column 20 is pulled back to the inside of the locking rod 6 by the rotating rod 11 through the pressing plate 18 at the moment, then the locking rod 6 is rotated, the locking rod 6 can be rotated out from the inside of the pedicle screw, and the separation of the sleeve 5 and the pedicle screw is realized.

The working principle is as follows: when the vertebral pedicle screw fixing device is used, firstly, a vertebral pedicle screw is fixed on a lumbar vertebra, a connecting rod for connecting the vertebral pedicle screw is placed at a threaded end of the vertebral pedicle screw, then the vertebral pedicle screw is screwed in the vertebral pedicle screw, the vertebral pedicle screw does not compress the connecting rod at the moment, the connecting rod can move in the vertebral pedicle screw, then the lower ends of two sleeves 5 are respectively aligned with the threaded end openings of two adjacent vertebral pedicle screws, the locking rod 6 is downwards rotated, the lower end of the locking rod 6 extends out of the sleeves 5 and then is meshed into the vertebral pedicle screws, so that the fixed connection between the vertebral pedicle screws and the sleeves 5 is realized (as shown in figures 1-2), in the state, the screw rod 7 is rotated, the screw rod 7 drives the movable arm 3 to move on the adjusting rod 1, the distance between the two sleeves 5 is changed, and the vertebral pedicle screws are expanded along with the movement of the two sleeves 5, after the screw 7 stops rotating, the two sleeves 5 support the two pedicle screws to fix the intervertebral space in a distraction state, the rotating rod 11 is rotated downwards at the moment to drive the pedicle screw cap to rotate, and then the pedicle screw cap is pressed on the side wall of the connecting rod after rotating, at the moment, the two pedicle screws are fixed in the distraction state through the connecting rod, and after the locking rod 6 is rotated upwards at the moment, the lower end of the locking rod 6 is withdrawn from the threaded end of the pedicle screw and retracted into the sleeve 5, so that the sleeve 5 is separated from the pedicle screw, and the intervertebral space distraction operation is completed;

in addition, in order to prevent the connecting rod from interfering with the operation (for example, the pathological intervertebral disc is removed after the intervertebral space is expanded), the connecting rod can be inserted into the threaded end of the pedicle screw after the operation is finished, namely: the pedicle screw is fixed on the lumbar vertebra, the pedicle nut is screwed in the pedicle screw, a space for inserting the connecting rod is reserved below the pedicle nut, and then the pedicle screw is fixedly connected with the sleeve 5 (as shown in figures 1-2), in this state, the intervertebral space is expanded, the two sleeves 5 support the two pedicle screws, so that the intervertebral space is fixed in the expanded state, after the expansion is finished, the connecting rod is inserted into the threaded end of the pedicle screw (below the pedicle screw cap), then downwardly rotating dwang 11, cause dwang 11 drive pedicle of vertebral arch nut to rotate the back and sticis on the lateral wall of connective bar, fix two pedicle of vertebral arch screws in the state of strutting through the connective bar this moment, break away from sleeve 5 and pedicle of vertebral arch screw this moment, accomplish the intervertebral space and strut the operation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a take intervertebral struts ware of scale with adjustable through lumbar vertebrae pedicle of vertebral arch screw which characterized in that: including adjusting pole (1), the front end fixedly connected with fixed arm (2) of adjusting pole (1), sliding connection has removal arm (3) on the lateral wall of adjusting pole (1), removal arm (3) and fixed arm (2) parallel arrangement, the one end that regulation pole (1) were kept away from in fixed arm (2) and removal arm (3) all is connected with sleeve (5) through adjusting device (4), locking lever (6) that are used for connecting the pedicle of vertebral arch screw have been cup jointed in the inside meshing of sleeve (5), lateral wall and fixedly connected with turning handle (22) of sleeve (5) are run through to the upper end of locking lever (6), the inside of locking lever (6) is equipped with and is used for driving pedicle of vertebral arch nut pivoted actuating mechanism (8).

2. The lumbar pedicle screw adjustable graduated intervertebral distractor of claim 1, wherein: adjusting device (4) include connecting arm (401), the front end of connecting arm (401) is rotated and is connected with round pin axle (402), the screw thread end meshing of round pin axle (402) is connected with butt joint piece (403), it has T type piece (404) to peg graft on the lateral wall of butt joint piece (403), T type piece (404) are fixed on butt joint piece (403) through bolt (405), one side fixed connection of T type piece (404) is on the lateral wall of sleeve (5).

3. The lumbar pedicle screw adjustable graduated intervertebral distractor of claim 2, wherein: the two connecting arms (401) are respectively connected with the fixed arm (2) and the moving arm (3) in a rotating mode.

4. The lumbar pedicle screw adjustable graduated intervertebral distractor of claim 1, wherein: the inside of adjusting pole (1) rotates and is connected with screw rod (7), the one end of screw rod (7) runs through the lateral wall of adjusting pole (1) and fixedly connected with drive handle (23), moving arm (3) are close to the meshing of the one end of adjusting pole (1) and are cup jointed on the lateral wall of screw rod (7).

5. The lumbar pedicle screw adjustable graduated intervertebral distractor of claim 1 or 3, wherein: the side wall of the adjusting rod (1) is marked with scale marks (10), and the side wall of the moving arm (3) is fixedly connected with a pointer (9).

6. The lumbar pedicle screw adjustable graduated intervertebral distractor of claim 1, wherein: actuating mechanism (8) are including dwang (11), the inside at locking lever (6) is connected in dwang (11) meshing, the upper end of dwang (11) runs through the lateral wall and fixedly connected with knob (24) of locking lever (6), just there is telescopic link (13) inside through first spring (12) sliding connection of the lower extreme of dwang (11), the lateral wall and the fixedly connected with that the lower extreme of telescopic link (13) runs through dwang (11) are used for pegging graft at inside drive head (14) of pedicle of vertebral arch nut, fixedly connected with joint dish (15) on the inner wall of locking lever (6), fixedly connected with joint pole (16) on the lateral wall of telescopic link (13), joint pole (16) activity joint is on the last side of joint dish (15).

7. The lumbar pedicle screw adjustable graduated intervertebral distractor of claim 1, wherein: actuating mechanism (8) are including dwang (11), the inside at locking lever (6) is connected in dwang (11) meshing, the upper end of dwang (11) runs through the lateral wall and the fixedly connected with knob (24) of locking lever (6), the lower extreme fixedly connected with clamp plate (18) of dwang (11), the lower extreme of clamp plate (18) is connected with a plurality of inseparable grafting posts (20) of arranging through second spring (19).

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