CN112568986B - Vertebral plate distraction and prosthesis implantation device - Google Patents

Abstract

The invention provides a vertebral plate distraction and prosthesis implantation device, which comprises: the opening component comprises an opening main body and an overturning part, the opening main body is provided with a first opening part, the overturning part is provided with a second opening part arranged corresponding to the first opening part, and the overturning part can overturn relative to the opening main body so as to adjust the opening angle between the first opening part and the second opening part; the clamping component is movably arranged on the distraction main body and is provided with a clamping part used for clamping the prosthesis. Through the technical scheme that this application provided, can solve the unable problem of realizing implanting the prosthesis when strutting the gap among the prior art.

Description

Laminar distraction and prosthetic implant devices

technical field

The invention relates to the technical field of medical devices, in particular, to a laminar distraction and prosthesis implantation device.

Background technique

Spinal laminoplasty is a surgical method in which one or both sides of the lamina are incised and displaced posteriorly and laterally to expand the spinal canal. It is often used to treat severe cervical spinal stenosis, cervical spine Posterior longitudinal ligament ossification and multi-segment cervical myelopathy.

Spinal laminoplasty opens the lamina into two "doors", which expand the sagittal diameter of the spinal canal and conform to the cylindrical structure of the spine, enabling uniform decompression of the spinal cord. In clinical practice, after the bilateral lamina is exposed through the posterior cervical operative approach, all the spinous processes of the "door" are cut off according to the plan, the lamina is clamped from the bottom to the top from the middle, and the ligaments (including the yellow ligaments) above and below the "door" are cut horizontally. ligament, interspinous ligament and supraspinous ligament), make a bone groove on each side 5mm next to the midline, leave 2mm of bone as a loose leaf, insert a wide periosteal peeler into the separation of the spinous process and twist it 90 degrees, you can The vertebral plate stands up. Then sew the top of the ligamentum flavum and the joint capsule with a thin thread and a small round needle, sew each ligamentum flavum on both sides, and leave a bone window of about 10mm to cover with the fat piece taken from under the skin. The lower spinous process is divided into small strips and placed in the loose-leaf section. After the underlying muscles are sutured, a negative pressure drainage tube is placed and sutured in layers.

Because the "double door" requires bilateral incision of the lamina, the gap is opened to lift the spinous process, and the prosthesis is added to the gap and fixed with the bone plate, commonly known as "roof lift". In the prior art, it is not possible to implant the prosthesis while distracting the gap.

SUMMARY OF THE INVENTION

The present invention provides a laminae distraction and prosthesis implantation device to solve the problem in the prior art that the prosthesis cannot be implanted while the gap is distracted.

The invention provides a vertebral plate expansion and prosthesis implantation device. The vertebral plate expansion and prosthesis implantation device comprises: a expansion component, including a expansion main body and a turning part, and the expansion main body has a first expansion part , the flipping piece has a second spreading part corresponding to the first spreading part, and the flipping piece can be flipped relative to the spreading main body to adjust the opening angle between the first spreading part and the second spreading part; the clamping assembly, It is movably arranged on the spreader body, and the clamping assembly has a clamping portion for clamping the prosthesis.

Further, the opening assembly further includes: a first connecting piece, the first end of the first connecting piece is adjustable in position on the opening main body, the turning piece is hinged with the second end of the first connecting piece; the driving part is connected with The inversion piece is drivingly connected, so as to drive the inversion piece to move and invert relative to the opening main body.

Further, the spreader assembly also includes a first pin shaft, an arc-shaped groove is provided on the side wall of the spreader body, the arc-shaped groove is located on the rear side of the first spreader part, and the arc-shaped groove is close to the first spreader part. The direction is gradually upturned, and the first pin shaft passes through the first end of the first connecting piece and the arc-shaped groove.

Further, the driving part comprises: a transmission part, the transmission part is movably arranged on the opening main body, the first end of the transmission part is hinged with the end of the turning part away from the second opening part; the driving part, the driving part can be relatively supported When the main body rotates, the axis of the driving member coincides with or is parallel to the axis of the transmission member, and the driving member is screwed with the second end of the transmission member.

Further, the opening main body has a first installation hole, the first end of the driving member is rotatably penetrated in the first installation hole, the first end of the driving member is provided with an external thread, and the second end of the transmission member is provided with an internal thread. The second end of the driving member is located outside the first mounting hole to form a first operating end.

Further, the vertebral plate expansion and prosthesis implantation device also includes a limiter, a limiter groove is arranged on the side wall of the driver, the limiter groove extends along the circumferential direction of the driver, and the limiter is movably penetrated through the limiter. The main body is stretched and set corresponding to the limit groove.

Further, the clamping assembly includes: a push-pull rod, which is movably disposed on the spreader body; a clamping shear, which is disposed on the push-pull rod, and the clamping portion is disposed on the clamping shears.

Further, the clamping assembly also includes a second connecting piece and a second pin, one end of the second connecting piece is connected to one of the clamping shears and the push-pull rod, and the other end of the second connecting piece is connected to the clamp through the second pin. The scissors and the push-pull rod are hinged on the other.

Further, the lamina distraction and prosthesis implantation device further includes a rotation stop structure, which is arranged between the push-pull rod and the spreader assembly to limit the rotation of the push-pull rod relative to the spreader assembly.

Further, the push-pull rod is movably passed through the spreader assembly, the first end of the push-pull rod is set close to the first spreader portion, the clamping shears are located at the first end of the push-pull rod, and the second end of the push-pull rod is located at the spreader portion. the outside of the assembly to form the second operating end.

Applying the technical solution of the present invention, the vertebral plate expansion and prosthesis implantation device includes a expansion component and a clamping component, the expansion component includes a expansion main body and a turning member, and the clamping component is movably arranged on the expansion main body. First, turn the turning piece relative to the opening body to adjust the opening angle between the first opening part and the second opening part. The gap can be opened by the cooperation of the first opening part and the second opening part, and then use the The clamping part of the clamping component clamps the prosthesis, and then moves the clamping component relative to the spreader body to complete the implantation of the prosthesis. By cooperating with the spreading component and the clamping component, the prosthesis can be implanted while spreading the gap, so as to meet the usage requirements.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 shows an exploded view of a laminar distraction and prosthesis implantation device provided according to an embodiment of the present invention;

FIG. 2 shows a schematic structural diagram of a lamina distraction and prosthesis implantation device provided according to an embodiment of the present invention;

FIG. 3 shows a schematic structural diagram of a lamina distraction and prosthesis implantation device provided according to an embodiment of the present invention;

4 shows a cross-sectional view of a laminar distraction and prosthesis implantation device provided according to an embodiment of the present invention;

FIG. 5 shows a schematic structural diagram of a lamina distraction and prosthesis implantation device provided according to an embodiment of the present invention;

6 shows a cross-sectional view of a laminar distraction and prosthesis implant device provided according to an embodiment of the present invention;

FIG. 7 shows a schematic structural diagram of a lamina distraction and prosthesis implantation device provided according to an embodiment of the present invention;

Figure 8 shows a cross-sectional view of a laminar distraction and prosthesis implant device provided according to an embodiment of the present invention.

Wherein, the above-mentioned drawings include the following reference signs:

10. Spreading assembly; 11. Spreading main body; 111, First spreading part; 112, Arc-shaped groove; 113, First mounting hole; 114, First stop boss; 2. Spreading part; 122, second stop boss; 13, first connecting piece; 14, driving part; 141, transmission part; 1411, internal thread; 142, driving part; 1421, external thread; 1422, first Operation end; 1423, limit slot; 1424, second installation hole; 15, first pin; 20, clamping assembly; 21, clamping part; 22, push-pull rod; 221, second operation end; 222, stop 23, clamping scissors; 24, second connecting piece; 25, second pin; 40, anti-rotation structure; 50, guiding structure; 51, guiding groove; 52, guiding column.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIGS. 1 to 8 , an embodiment of the present invention provides a lamina distraction and prosthesis implantation device. The lamina distraction and prosthesis implantation device includes a distraction component 10 and a clamping component 20 . Wherein, the spreading assembly 10 includes a spreading main body 11 and a flipping member 12, the spreading main body 11 has a first spreading portion 111, the flipping member 12 has a second spreading portion 121 corresponding to the first spreading portion 111, and the flipping member 12 can be turned relative to the opening body 11 to adjust the opening angle between the first opening part 111 and the second opening part 121 . The gap can be opened by the cooperation of the first opening part 111 and the second opening part 121 . In this embodiment, the clamping assembly 20 is movably disposed on the spreading body 11 , and the clamping assembly 20 has a clamping portion 21 for clamping the prosthesis. The prosthesis can be delivered using the clamp assembly 20 .

Applying the lamina distraction and prosthesis implantation device provided in this embodiment, firstly, the inverting member 12 is inverted relative to the distracting body 11 to adjust the opening angle between the first distracting portion 111 and the second distracting portion 121 . The gap is opened by the cooperation of the first spreading portion 111 and the second spreading portion 121 , and then the prosthesis is clamped by the clamping portion 21 of the clamping assembly 20 , and then the clamping assembly 20 is relatively opened to the main body 11 . Move to complete the implantation of the prosthesis. With the cooperation of the spreading component 10 and the clamping component 20, the prosthesis can be implanted while spreading the gap, so as to meet the usage requirements.

In this embodiment, the movement refers to movement along the axis of the main body 11 .

As shown in FIG. 1 , in this embodiment, the spreading assembly 10 further includes a first connecting member 13 and a driving portion 14 . The position of the first end of the first connecting member 13 is adjustable on the spreading main body 11 . 12 is hinged with the second end of the first connecting member 13 , and the driving part 14 is drivingly connected with the turning member 12 to drive the turning member 12 to move and turn relative to the opening body 11 .

When the vertebral plate needs to be stretched, firstly insert the first stretched part 111 and the second stretched part 121 into the gap, and then use the driving part 14 to drive the turning piece 12 to move relative to the spreading body 11 , when the turning piece 12 moves During the process, since the flipping member 12 is hinged with the second end of the first connecting member 13, under the action of the driving part 14, the flipping member 12 will flip relative to the opening main body 11, so as to realize the opening of the gap and the spinous process at the same time. Move back to enlarge the intervertebral foramen.

As shown in FIGS. 1 , 2 and 7 , the spreader assembly 10 further includes a first pin 15 , an arc-shaped groove 112 is provided on the side wall of the spreader body 11 , and the arc-shaped groove 112 is located in the first spreader portion 111 . On the rear side of the first connecting member 13 , the arc-shaped groove 112 is gradually upturned in the direction close to the first opening portion 111 , and the first pin 15 is inserted through the first end of the first connecting member 13 and the arc-shaped groove 112 . When the driving part 14 drives the turning member 12 to move relative to the opening body 11 , the first end of the first connecting member 13 slides in the arc-shaped groove 112 through the first pin 15 , because the turning member 12 is connected to the first The second end of the member 13 is hingedly connected, and the flipping member 12 will flip relative to the opening body 11 while moving relative to the opening body 11 , so as to move the spinous process backward while opening the gap. In this embodiment, the first pin shaft 15 and the first connecting member 13 are integrally formed.

In this embodiment, the first opening portion 111 is located at the front end of the opening body 11 , the second opening portion 121 is located at the front end of the turning member 12 , the driving portion 14 is drivingly connected with the rear end of the turning member 12 , and the first connecting member The hinge point between the second end of 13 and the turning piece 12 is located between the front end of the turning piece 12 and the rear end of the turning piece 12 .

The radius of the arc-shaped groove 112 is between 12 mm and 14 mm, and the arc length of the arc-shaped groove 112 is between 7 mm and 9 mm, which can ensure that the gap is opened by a sufficient size and the spinous process can be moved back a sufficient distance. Specifically, the width of the arc-shaped groove 112 is 2 mm.

By adjusting parameters such as the center position, radius, and arc length of the arc-shaped groove 112 , the movement trajectory of the second opening portion 121 of the turning member 12 can be controlled, thereby meeting various usage requirements. In this embodiment, the lamina can be lifted by 6mm or 8mm using the laminar distraction and prosthesis implantation device.

As shown in FIG. 1 and FIG. 2 , the driving part 14 includes a transmission member 141 and a driving member 142 . The transmission member 141 is movably disposed on the opening main body 11 . One end of the opening portion 121 is hinged, and the driving member 142 can rotate relative to the opening body 11 . When the driving member 142 rotates relative to the opening main body 11 , the driving member 142 can drive the transmission member 141 to translate relative to the opening main body 11 through the threaded structure, and then the transmission member 141 can be used to drive the turning member 12 to move and turn relative to the opening main body 11 .

In this embodiment, the upper surface of the transmission member 141 is in contact with the lower surface of the opening body 11 , and the transmission member 141 can translate along the axial direction of the opening body 11 .

As shown in FIG. 1 , the spreading main body 11 has a first mounting hole 113, the first end of the driving member 142 is rotatably penetrated in the first mounting hole 113, and the first end of the driving member 142 is provided with an external thread 1421, The second end of the transmission member 141 is provided with an inner thread 1411 , and the second end of the driving member 142 is located outside the first installation hole 113 to form a first operation end 1422 . A sleeve is provided at the second end of the transmission member 141, the sleeve has an inner thread 1411, and the first end of the driving member 142 is penetrated in the sleeve. By rotating the first operating end 1422, the driving member 142 can be rotated to facilitate the operation.

As shown in FIG. 1 , the lamina distraction and prosthesis implantation device further includes a limiting member, a limiting groove 1423 is provided on the side wall of the driving member 142 , and the limiting groove 1423 extends along the circumferential direction of the driving member 142 to limit the position The parts are movably penetrated on the opening main body 11 and are arranged corresponding to the limiting grooves 1423 . When the limiting member is located outside the limiting slot 1423 , the driving member 142 can move and rotate relative to the opening body 11 , and when the limiting member is inserted into the limiting slot 1423 , the driving member 142 can rotate relative to the opening body 11 . The driving member 142 can be limited by the cooperation of the limiting member and the limiting groove 1423 to prevent the driving member 142 from being detached from the first installation hole 113 .

As shown in FIGS. 1 and 2 , in this embodiment, the clamping assembly 20 includes a push-pull rod 22 and a clamping shear 23 , the push-pull rod 22 is movably disposed on the spreading body 11 , and the clamping shears 23 are disposed on the push-pull rod 22 , the clamping portion 21 is provided on the clamping shears 23 . By pushing and pulling the push-pull rod 22 , the clamping scissors 23 on the push-pull rod 22 can be driven to move, and the prosthesis can be transported by the clamping scissors 23 .

Wherein, the push-pull rod 22 is movably penetrated in the spreader assembly 10 , the first end of the push-pull rod 22 is disposed close to the first spreader portion 111 , the clamping shears 23 are located at the first end of the push-pull rod 22 , and the The second end is located at the outer side of the spreader assembly 10 to form the second operation end 221 , and the second operation end 221 is used to facilitate the user's operation.

As shown in FIG. 1 , in this embodiment, the driving member 142 has a second installation hole 1424 , and the push-pull rod 22 is movably penetrated in the second installation hole 1424 . By adopting the above structure, the assembling space required for the clamping assembly 20 can be reduced, the integration degree of the device can be improved, and the miniaturization of the device can be easily realized.

Specifically, the second mounting hole 1424 is coaxial with the first mounting hole 113 .

As shown in FIG. 1 , the clamping assembly 20 further includes a second connecting piece 24 and a second pin shaft 25 , one end of the second connecting piece 24 is connected with the clamping shears 23 , and the other end of the second connecting piece 24 is connected by a second pin The shaft 25 is hinged to the push-pull rod 22 . The clamping scissors 23 can be rotated relative to the push-pull rod 22 through the second pin shaft 25 , so as to adjust the pitch angle of the clamping portion 21 , which is convenient for implanting the prosthesis into the human body.

In other embodiments, one end of the second connecting member 24 can be connected to the push-pull rod 22 , and the other end of the second connecting member 24 is hinged to the clamping shears 23 through the second pin 25 .

In this embodiment, the lamina distraction and prosthesis implantation device further includes a rotation stop structure 40 , and the rotation stop structure 40 is disposed between the push-pull rod 22 and the spreader assembly 10 to limit the push-pull rod 22 relative to the spreader assembly 10 . The rotation ensures that the clamping shears 23 will not rotate relative to the spreading assembly 10, which can ensure the stability of the prosthesis during transportation.

As shown in FIG. 1 , a rotation-stop surface 222 is provided on the side wall of the push-pull rod 22 . By arranging a limiter such as a screw on the spreader body 11 , the end of the screw is set corresponding to the rotation-stop surface 222 . With the cooperation of the rotating surface 222, the rotation stop of the push-pull rod 22 can be realized.

In the present embodiment, the spreader assembly 10 and the clamp assembly 20 are symmetrical structures, and the symmetry line of the clamp assembly 20 is parallel to the symmetry line of the spreader assembly 10, which facilitates the operation and ensures the accuracy of the operation.

As shown in FIG. 1 , the lamina spreading device further includes a guide structure 50 , and the guide structure 50 is arranged between the transmission member 141 and the spreading body 11 . When the transmission member 141 moves relative to the opening body 11 , the transmission member 141 can be guided by the guide structure 50 .

The guide structure 50 includes a guide groove 51 and a guide column 52. The guide groove 51 is provided on one of the transmission member 141 and the opening body 11. The guide groove 51 extends along the axial direction of the opening body 11. The guide column 52 is provided On the other one of the transmission member 141 and the spreading body 11 , the guide post 52 is movably penetrated in the guide groove 51 .

In addition, when the driving member 142 rotates relative to the transmission member 141 , the guide groove 51 and the guide column 52 cooperate to restrict the rotation of the transmission member 141 relative to the opening body 11 to ensure that the transmission member 141 translates relative to the opening body 11 .

In order to limit the depth of insertion of the lamina spreading device into the lamina gap, a first stop boss 114 is provided on the spreading body 11 , a second stop boss 122 is provided on the turning member 12 , the first stop The boss 114 is located at the rear of the first opening portion 111 , and the second blocking boss 122 is located at the rear of the second opening portion 121 .

In order to ensure the firmness of the contact between the lamina spreading device and the bone, both the first spreading portion 111 and the second spreading portion 121 are provided with anti-skid structures. In this embodiment, the anti-skid structure is a plurality of tooth-shaped bosses.

In this embodiment, the front end of the spreading main body 11 includes two support arms that are parallel to each other, and the two support arms are provided with a first spreading portion 111. The vertebral plate spreading device includes two turning parts 12, two The turning pieces 12 are respectively arranged on the two support arms, so that the stability can be ensured.

Wherein, the vertebral plate spreading device further includes an angle indicator, and the angle indicator is arranged on the turning member 12 . The angle of the opening of the turning element 12 relative to the opening body 11 can be displayed by the angle indicator. In other embodiments, the angle indicator may be provided on the spreader body 11 , or the angle indicator may be provided on the spreader body 11 and the flipper 12 at the same time.

Specifically, the angle indicator includes an angle indicator plate, the angle indicator plate is disposed on the turning member 12, and the upper surface of the angle indicator plate is an inclined plane. When the turning member 12 is turned to a predetermined angle relative to the opening body 11 , the upper surface of the angle indicating plate will be parallel to the lower surface of the opening body 11 to prompt the user that the turning member 12 is turned in place. Wherein, the angle indicator may also be a component with an angle scale provided on the spreading body 11 and/or the turning member 12 .

In this embodiment, the laminar distraction and prosthesis implantation device is suitable for spinal internal fixation surgery.

With the device provided in this embodiment, the prosthesis can be implanted while the gap is opened, and the effect of lifting (6mm, 8mm) of the lamina can be achieved while the predetermined width of the lamina can be stretched, thereby meeting the needs of use .

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise. Meanwhile, it should be understood that, for the convenience of description, the dimensions of various parts shown in the accompanying drawings are not drawn in an actual proportional relationship. Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the authorized description. In all examples shown and discussed herein, any specific value should be construed as illustrative only and not as limiting. Accordingly, other examples of exemplary embodiments may have different values. It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of the present invention, it should be understood that the orientations indicated by orientation words such as "front, rear, top, bottom, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. Or the positional relationship is usually based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and these orientation words do not indicate or imply the indicated device or element unless otherwise stated. It must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be construed as a limitation on the protection scope of the present invention; the orientation words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

For ease of description, spatially relative terms, such as "on", "over", "on the surface", "above", etc., may be used herein to describe what is shown in the figures. The spatial positional relationship of one device or feature shown to other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or features would then be oriented "below" or "over" the other devices or features under other devices or constructions". Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood to limit the scope of protection of the present invention.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. A lamina distracting and prosthetic implant device, comprising:

the stretching assembly (10) comprises a stretching main body (11) and an overturning part (12), wherein the stretching main body (11) is provided with a first stretching part (111), the overturning part (12) is provided with a second stretching part (121) arranged corresponding to the first stretching part (111), and the overturning part (12) can overturn relative to the stretching main body (11) so as to adjust the opening angle between the first stretching part (111) and the second stretching part (121);

a gripping assembly (20) movably arranged on the distraction body (11), the gripping assembly (20) having a gripping portion (21) for gripping a prosthesis;

the distractor assembly (10) further comprises:

the first end position of the first connecting piece (13) is adjustably arranged on the distraction body (11), and the turnover piece (12) is hinged with the second end of the first connecting piece (13);

the driving part (14) is in driving connection with the overturning part (12) so as to drive the overturning part (12) to move and overturn relative to the spreading main body (11);

the strutting assembly (10) further comprises a first pin shaft (15), an arc-shaped groove (112) is formed in the side wall of the strutting main body (11), the arc-shaped groove (112) is located on the rear side of the first strutting portion (111), the arc-shaped groove (112) gradually upwarps in the direction close to the first strutting portion (111), and the first pin shaft (15) penetrates through the first end of the first connecting piece (13) and the arc-shaped groove (112);

the clamping assembly (20) comprises:

a push-pull rod (22) movably disposed on the distracting body (11);

the clamping scissors (23) are arranged on the push-pull rod (22), and the clamping portion (21) is arranged on the clamping scissors (23).

2. The laminar distraction and prosthetic implant device according to claim 1, wherein said drive portion (14) comprises:

the transmission piece (141) is movably arranged on the expanding main body (11), and a first end of the transmission piece (141) is hinged with one end, far away from the second expanding part (121), of the overturning piece (12);

the driving piece (142) can rotate relative to the opening main body (11), the axis of the driving piece (142) is coincident with or parallel to the axis of the transmission piece (141), and the driving piece (142) is in threaded fit with the second end of the transmission piece (141).

3. The lamina distraction and prosthetic implant device of claim 2, wherein the distraction body (11) has a first mounting hole (113), the first end of the driving member (142) is rotatably disposed through the first mounting hole (113), the first end of the driving member (142) is provided with external threads (1421), the second end of the driving member (141) is provided with internal threads (1411), and the second end of the driving member (142) is located outside the first mounting hole (113) to form a first operating end (1422).

4. The device according to claim 2, further comprising a limiting member, wherein a limiting groove (1423) is disposed on a sidewall of the driving member (142), the limiting groove (1423) extends along a circumferential direction of the driving member (142), and the limiting member is movably disposed on the distracting body (11) and corresponding to the limiting groove (1423).

5. The laminar distraction and prosthetic implant device according to claim 1, wherein the clamping assembly (20) further comprises a second connector (24) and a second pin (25), one end of the second connector (24) being connected to one of the clamping shears (23) and the push-pull rod (22), and the other end of the second connector (24) being hinged to the other of the clamping shears (23) and the push-pull rod (22) by the second pin (25).

6. The lamina distraction and prosthetic implant device of claim 1, further comprising a rotation stop structure (40), the rotation stop structure (40) being disposed between the push-pull rod (22) and the distraction assembly (10) to limit rotation of the push-pull rod (22) relative to the distraction assembly (10).

7. The lamina distraction and prosthetic implant device of claim 1, wherein the push-pull rod (22) is movably disposed through the distraction assembly (10), a first end of the push-pull rod (22) is positioned proximate to the first distraction portion (111), the clamping shears (23) are positioned at the first end of the push-pull rod (22), and a second end of the push-pull rod (22) is positioned outside of the distraction assembly (10) to form a second operative end (221).

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