CN116035781A - Spinous process fusion device - Google Patents

Abstract

The invention discloses a spinous process fusion device, which comprises: a main body, an opening arm assembly and a movable arm assembly. A moving passage is provided inside the main body, and the moving passage runs through the first axial end of the main body. The opening arm assembly includes a push rod and two opening arms, and the two opening arms can pivot Rotately arranged at the second end of the main body, the opening arm is provided with a sliding part, the push rod is arranged in the moving channel, the first end of the push rod has a matching part, the matching part is slidingly matched with the sliding part, and the push rod is movable along the axial direction of the moving channel to adjust the included angle between the opening arm and the axial direction of the main body, and the movable arm assembly is set A clamping cavity is defined on the main body and with the opening arm. The spinous process fusion device of the present invention has a simple structural design, is convenient for installation and disassembly, and has high reliability after installation.

Description

spinous process fusion device

technical field

The invention relates to the technical field of orthopedic implants, in particular to a spinous process fusion device.

Background technique

Spinal stenosis is a condition in which the spinal canal narrows and compresses the spinal cord and nerves, usually caused by degenerative changes in the spine. Among them, spinal stenosis can also be caused by herniated disc, osteoporosis, tumor or other unexpected strenuous activities. For the above-mentioned spinal diseases, surgeons can restore the normal spacing between adjacent vertebrae through fusion devices to achieve the purpose of treatment.

However, in the related art, the structure of the fusion device is complicated, many parts are required, the risk of falling off and failure in the later stage is high, and it is inconvenient to disassemble the fusion device, and the use effect is poor.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

Therefore, the embodiment of the present invention proposes a spinous process fusion device with simple structural design, easy installation and disassembly, and high reliability after installation.

The spinous process fusion device according to the embodiment of the present invention includes: a main body, a moving channel is arranged inside the main body, and the moving channel runs through the axial first end of the main body; an opening arm assembly, the opening arm assembly The assembly includes a push rod and two opening arms, the two opening arms are pivotably arranged at the second end of the main body, a sliding part is provided on the opening arm, and the push rod is arranged on the second end of the main body. In the moving channel, the first end of the push rod has a matching part, and the matching part is slidingly fitted with the sliding part, and the pushing rod is movable along the axial direction of the moving channel to adjust the opening an included angle between the arm and the axial direction of the main body; a movable arm assembly, the movable arm assembly is arranged on the main body and defines a clamping cavity with the opening arm.

According to the spinous process fusion device of the embodiment of the present invention, when the spinous process fusion device is implanted, the push rod can be moved in the direction toward the opening arm to drive the opening arm to expand to a set angle, and then adjust the movable arm The components are positioned such that the open arm and movable arm components clamp and fix adjacent vertebrae for fusion of the vertebrae. When the spinous process fusion device needs to be taken out, the movable arm assembly can be removed first, and then the push rod can be moved in a direction away from the open arm, so that the push rod can drive the open arm to retract, so as to facilitate the spinous process fusion device from the removed from the human body.

In the spinous process fusion device of the embodiment of the present invention, since the push rod is directly connected to the opening arm, and the push rod and the opening arm are slidably connected through the sliding part and the matching part, the installation and installation of the spinous process fusion device can be facilitated. It can be disassembled, and the number of required components is small, and the stability and reliability after implantation are high.

In some embodiments, the opening arm assembly further includes a pusher and a guide, both of which are located in the moving channel, and the pusher is connected to the second end of the push rod connected, the guide has a guide hole, the push rod is fixedly passed through the guide hole, and the push member is movable along the axial direction of the moving channel to drive the push rod along the guide Axial movement of the hole.

In some embodiments, at least one of the pusher and the guide is threadedly engaged with the moving channel; and/or, the second end of the push rod has a first protrusion, and the pusher A first card slot is provided inside, and the first card protrusion is elastically engaged with the first card slot.

In some embodiments, both the pusher and the guide are threadedly engaged with the moving channel, the pusher is provided with a first stepped surface, the guide is provided with a second stepped surface, the The guide has a first state and a second state, in the first state, the pusher is spaced apart from the guide, and the pusher can drive the push rod to move axially along the guide hole, In the second state, the first stepped surface is in contact with the second stepped surface, and the pusher can drive the guide to rotate, so as to drive the push rod to move along the axial direction of the guide hole and Rotate relative to the moving channel to expand and lock the opening arms.

In some embodiments, the first end of the push rod has a first notch, and when the spreading arm is stretched to a set angle, at least part of the spreading arm snaps into the first recess. inside the notch, so as to restrict the movement of the opening arm relative to the main body; and/or, the opening arm is provided with a second notch, and when the opening arm is extended to a set angle, at least a part The matching part is snapped into the second notch to restrict the movement of the opening arm relative to the main body; and/or, the sliding part is a sliding groove, and the sliding groove is arranged along the opening arm. Extending in the lengthwise direction, the matching portion is a clamping column, and the clamping column is slidably fitted in the sliding groove; and/or, a drive slot is provided at the end of the pushing member away from the guide member; and/or, A limiting member is arranged in the guide hole, and the limiting member cooperates with the push rod to limit the rotation of the push rod relative to the guide hole.

In some embodiments, the position of the movable arm assembly along the axial direction of the main body is adjustable to adjust the size of the clamping cavity.

In some embodiments, the movable arm assembly includes a sliding sleeve, a movable arm and a rotating shaft, the sliding sleeve is arranged on the main body and its position along the axial direction of the main body is adjustable, and the movable arm is arranged on the The sliding sleeve, the rotating shaft is passed through the movable arm and connected with the sliding sleeve, the axial direction of the rotating shaft is perpendicular to the axial direction of the main body, and the movable arm rotates around the axis of the rotating shaft to swing.

In some embodiments, the movable arm includes a swing sleeve and two movable teeth, the swing sleeve is sleeved on the sliding sleeve, and the two movable teeth are respectively arranged on both sides of the swing sleeve, the The movable teeth are rotatable between an open position and a retracted position. In the retracted position, the length direction of the movable teeth is parallel to the axial direction of the swing sleeve. In the expanded position, the movable teeth The length direction of the swing sleeve is perpendicular to the axial direction of the swing sleeve; or, the movable arm includes a swing sleeve and two movable teeth, the swing sleeve is set on the sliding sleeve, and the two movable teeth are respectively arranged on On both sides of the swing sleeve, the movable teeth are relatively fixed to the swing sleeve, and the length direction of the movable teeth is perpendicular to the axial direction of the swing sleeve; and/or, the outer wall of the main body is provided with There is a rack, and the rack extends along the axial direction of the main body. The sliding sleeve is provided with locking teeth, and the locking teeth are elastically engaged with the rack.

In some embodiments, the main body includes a first main body and a second main body, the second main body is disposed at an end of the first main body facing away from the opening arm, the first main body and the second main body arranged coaxially, and the first body is detachably connected to the second body.

In some embodiments, one of the first main body and the second main body is provided with a second locking protrusion, and the other is provided with a second locking slot, and the second locking protrusion is elastically engaged with the In the second locking slot, the second main body can rotate relative to the first main body, so that the second locking protrusion is disengaged from the second locking slot.

In some embodiments, both the main body and the push rod are provided with a bone graft hole, and the bone graft hole communicates with the moving channel; and/or, the outer peripheral wall of the main body is provided with a threaded surface, The thread surface is adjacent to the second end of the main body; and/or, the second end of the main body is a tip; and/or, the outer peripheral wall of the main body is provided with a clamping groove, and the clamping groove is adjacent to The first end of the main body; and/or, the end of the opening arm away from the main body is provided with a first tooth point.

Description of drawings

Fig. 1 is a schematic diagram of a spinous process fusion device according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of both the expanded arm assembly and the movable arm assembly of the spinous process fusion device according to the embodiment of the present invention being stretched.

Fig. 3 is an exploded view of the spinous process fusion device according to the embodiment of the present invention.

Fig. 4 is a cross-sectional view of the spinous process fusion device (the pusher and the guide are spaced apart) according to the embodiment of the present invention.

Fig. 5 is a sectional view of the spinous process fusion device according to the embodiment of the present invention (the pusher and the guide are in contact).

Fig. 6 is a schematic diagram of the stretched arm of the spinous process fusion device according to the embodiment of the present invention (after removing the first main body).

Fig. 7 is a schematic diagram of the stretched arms of the spinous process fusion device according to the embodiment of the present invention (after removing the first main body).

Fig. 8 is a partial schematic view of the opening arm assembly of the spinous process fusion device according to the embodiment of the present invention.

Fig. 9 is another partial schematic view of the opening arm assembly of the spinous process fusion device according to the embodiment of the present invention.

Fig. 10 is a schematic diagram of the push rod of the spinous process fusion device according to the embodiment of the present invention.

Fig. 11 is a schematic diagram of the first body of the spinous process fusion device according to the embodiment of the present invention.

Fig. 12 is a schematic diagram of the second body of the spinous process fusion device according to the embodiment of the present invention.

Fig. 13 is a side view of the spinous process fusion device according to the embodiment of the present invention.

Fig. 14 is a schematic diagram of the opened arms of the spinous process fusion device according to the embodiment of the present invention.

Fig. 15 is a schematic diagram of another perspective of the opened arm of the spinous process fusion device according to the embodiment of the present invention.

Fig. 16 is a schematic diagram of the pusher of the spinous process fusion device according to the embodiment of the present invention.

Fig. 17 is a cross-sectional view of the pusher of the spinous process fusion device according to the embodiment of the present invention.

Fig. 18 is a schematic diagram of the guide member of the spinous process fusion device according to the embodiment of the present invention.

Fig. 19 is a schematic diagram of the movable arm of the spinous process fusion device according to the embodiment of the present invention.

Fig. 20 is a schematic diagram of the sliding sleeve of the spinous process fusion device according to the embodiment of the present invention.

Reference signs:

1. Main body; 11. Moving channel; 12. Rack; 13. First main body; 131. Second card slot; 132. Thread surface; 14. Second main body; 141. Second card protrusion; 142. Clamping groove ;

2. Opening arm assembly; 21. Push rod; 211. Cooperating part; 2111. Clamping column; 212. First clamping protrusion; 213. First concave part; 214. Bone grafting hole; 22. Opening arm; 221 , sliding part; 2211, chute; 222, second notch; 223, first tooth tip; 23, pusher; 231, first slot; 232, first step surface; 233, drive slot; 24, Guide piece; 241, the second step surface; 242, guide hole; 25, column pin;

3, movable arm assembly; 31, sliding sleeve; 311, locking teeth; 32, movable arm; 321, swing sleeve; 3211, rotating shaft hole; 322, movable tooth; 3221, second tooth tip; 33, rotating shaft.

Detailed ways

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

A spinous process fusion device according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 20 .

As shown in Figures 1 to 5, the spinous process fusion device according to the embodiment of the present invention includes: a main body 1, an opening arm assembly 2 and a movable arm assembly 3, and the opening arm assembly 2 includes a push rod 21 and two opening arms twenty two.

The main body 1 is provided with a moving channel 11 , and the moving channel 11 runs through the first axial end of the main body 1 (as shown in the right end of the main body 1 in FIG. 1 ). Two opening arms 22 are pivotally arranged on the second end of the main body 1 (as shown in the right end of the main body 1 in Figure 1), the opening arms 22 are provided with a sliding part 221, and the push rod 21 is arranged in the moving channel 11, The first end of the push rod 21 (the left end of the push rod 21 in Fig. 3) has a matching portion 211, and the fitting portion 211 is slidingly fitted with the sliding portion 221, and the push rod 21 is movable along the axial direction of the moving channel 11 to adjust the opening The included angle between the arm 22 and the axial direction of the main body 1 . The movable arm assembly 3 is disposed on the main body 1 and defines a clamping cavity with the opening arm 22 .

It can be understood that, as shown in FIG. 4 and FIG. 5 , before the spinous process fusion device is implanted into the human body, the opening arm 22 is in an unstretched state, that is, the length direction of the opening arm 22 is aligned with the axial direction of the main body 1 . The angle between them is small. For example, the angle between the length direction of the opening arm 22 and the axial direction of the main body 1 is close to 0 degree, so as to facilitate the insertion of the spinous process fusion device between adjacent vertebrae. After the spinous process fusion device is implanted into the human body and the opening arm 22 is stretched, the angle between the length direction of the opening arm 22 and the axial direction of the main body 1 can be 90 degrees or close to 90 degrees, so that the opening arm 22 22 can fit with the bone surface of the vertebrae.

According to the spinous process fusion device of the embodiment of the present invention, when implanting the spinous process fusion device, the push rod 21 can be moved in a direction toward the opening arm 22 to drive the opening arm 22 to expand to a set angle, and then The position of the movable arm assembly 3 is adjusted so that the opening arm 22 and the movable arm assembly 3 clamp and fix adjacent vertebrae, so as to fuse the vertebrae. When the spinous process fusion device needs to be taken out, the movable arm assembly can be removed from the main body 1 first, and then the push rod 21 can be moved in a direction away from the opening arm 22, so that the pushing rod 21 can drive the opening arm 22 to retract, To facilitate the removal of the spinous process fusion device from the human body.

In the spinous process fusion device of the embodiment of the present invention, since the push rod 21 is directly connected to the opening arm 22, and the push rod 21 and the opening arm 22 are slidably connected through the sliding part 221 and the matching part 211, it is convenient for the spinous process fusion device. The fusion device can be installed and disassembled, and the number of parts required is small, and the stability and reliability after implantation are high.

Optionally, the position of the movable arm assembly 3 along the axial direction of the main body 1 is adjustable. It can be understood that, when the spinous process fusion device needs to be fixed, the movable arm assembly 3 can be pushed in in a direction away from the opening arm 22, so that the clamping formed between the moving arm assembly 3 and the opening arm 22 The cavity is narrowed to clamp and fix the vertebrae. When the spinous process fusion device needs to be taken out, the movable arm assembly 3 can be moved in a direction away from the opening arm 22, so as to increase the distance between the clamping chambers, thereby leaving enough space for the opening arm 22 to retract. To facilitate the removal of the spinous process fusion device from the human body. In addition, since the position of the movable arm assembly 3 along the axial direction of the main body 1 can be adjusted, the spinous process fusion device can clamp vertebrae of different sizes, which improves the application range of the spinous process fusion device.

In some embodiments, as shown in FIGS. 3 to 5 , the opening arm assembly 2 further includes a pusher 23 and a guide 24, both of which are located in the moving channel 11, and the pusher 23 and the push rod 21 connected to the second end, the guide 24 has a guide hole 242, the push rod 21 is fixedly passed through the guide hole 242, and the pusher 23 can move along the axial direction of the moving channel 11 to drive the push rod 21 along the guide hole 242 axial movement. It can be understood that, as shown in FIG. 4 , the pusher 23 is arranged at the right end of the push rod 21, the pusher 23 can drive the push rod 21 to move leftward or rightward, and the pusher 23 can stop the push rod 21, This prevents the push rod 21 from shaking in the moving channel 11 and improves the locking effect of the opening arm 22 .

Optionally, as shown in FIG. 3 to FIG. 5 , the pusher 23 is screwed into the moving channel 11 , and the guide 24 is screwed into the moving channel 11 . It can be understood that an internal thread is provided in the moving channel 11 , and the outer walls of the pushing member 23 and the guide member 24 cooperate with the internal thread. For example, the pusher 23 and the guide 24 can be screw plugs. The spinous process fusion device of the embodiment of the present invention can facilitate the adjustment of the pusher 23 and the guide 24 by threading the pusher 23 and the guide 24 with the moving channel 11. It can be installed and disassembled, and the anti-retraction effect of the pusher 23 is better, which reduces the problem of loosening of the opening arm 22 caused by the retreat of the pusher 23, and improves the stability of the spinous process fusion device after implantation.

Optionally, the end of the pusher 23 away from the guide 24 is provided with a driving groove 233, for example, the drive tooth groove is a quincunx-shaped slot hole, so that the operator can use a torx wrench to turn the pusher 23, which improves the installation convenience of the spinous process fusion device sex.

In some embodiments, as shown in FIG. 10 and FIG. 17 , the second end of the push rod 21 (the right end of the push rod in FIG. 10 ) has a first locking protrusion 212 , and the pushing member 23 is provided with a first locking groove 231 , the first locking protrusion 212 elastically engages with the first locking groove 231 . It can be understood that when the operator rotates the pusher 23 to push the push rod 21 toward the opening arm 22 , due to the anti-rotation effect of the guide hole 242 , the push rod 21 will not rotate relative to the guide hole 242 . Therefore, when the pushing member 23 rotates, the first protrusion 212 can rotate relative to the first groove 231 .

For example, the first engaging protrusion 212 is an annular engaging protrusion, and the first engaging groove 231 is an annular engaging groove, so that the rotation of the pushing member 23 will not interfere with the axial movement of the push rod 21, so that the push rod 21 and the pushing member 23 The linkage structure is more reasonable.

Optionally, a limiting member (not shown) is disposed in the guide hole 242 , and the limiting member cooperates with the push rod 21 to limit the rotation of the push rod 21 relative to the guide hole 242 .

For example, the limiting member is a limiting plane. It can be understood that the inner peripheral wall of the guide hole 242 is provided with a limiting plane, and the limiting plane fits with the push rod 21 so as to prevent the push rod 21 from rotating relative to the guide hole 242 .

For another example, the limiting member is a screw or pin structure, and the limiting member is installed on the guide hole 242 or the push rod 21 . Specifically, the guide hole 242 is provided with a limiter, which extends radially along the guide hole 242, and the push rod 21 is provided with a limit groove (not shown), and the limit groove extends along the length direction of the push rod 21 , the limit piece fits in the limit groove 21 and can slide along the length direction of the limit groove 21 , and the limit piece will limit the rotation of the push rod 21 relative to the guide hole 242 .

In some embodiments, as shown in FIGS. 16 and 17 , the pushing member 23 is provided with a first stepped surface 232 , the guide member 24 is provided with a second stepped surface 241 , and the guide member 24 has a first state and a second state. , in the first state, the pusher 23 is spaced apart from the guide 24 , and the pusher 23 can drive the push rod 21 to move axially along the guide hole 242 . In the second state, the first stepped surface 232 is in contact with the second stepped surface 241, and the pusher 23 can drive the guide 24 to rotate to drive the push rod 21 to move along the axial direction of the guide hole 242 and to rotate relative to the moving channel 11 to support Open and lock the opening arm 22.

It can be understood that, as shown in FIG. 4 and FIG. 5 , when the opening arm 22 is initially stretched, the pusher 23 is separated from the guide 24 by a certain distance, and the pusher 23 will gradually approach the guide 24 . At this time, the push rod 21 can slowly expand the opening arm 22 through the pushing action of the pushing member 23 . After the opening arm 22 is stretched to a certain angle, the pushing member 23 will contact the guiding member 24 , and the first stepped surface 232 will abut against the second stepped surface 241 . When the pusher 23 continues to rotate toward the guide 24, the guide 24 will also rotate synchronously under the action of the first stepped surface 232 and the second stepped surface 241, and then the guide 24 will drive the push rod 21 to rotate, and the push rod 21 While rotating, it will continue to move towards the direction of the opening arm 22, so that the opening arm 22 can be extended to a set angle, and due to the rotation of the push rod 21, the opening arm 22 can be clamped to limit The opening arm 22 moves relative to the main body 1 to improve the locking effect of the opening arm 22 . Therefore, the spinous process fusion device of the embodiment of the present invention can lock the opening arm 22 while stretching the opening arm 22 by setting the pusher 23 and the guide piece 24 to the above-mentioned structure, thereby reducing After implantation of the spinous process fusion device, the opening arm 22 becomes loose, which improves the reliability of the spinous process fusion device.

Optionally, as shown in FIGS. 7 to 10 , the first end of the push rod 21 has a first notch 213 , and when the opening arm 22 is extended to a set angle, at least part of the opening arm 22 snaps into it. Inside the first notch 213 to limit the movement of the opening arm 22 relative to the main body 1 . It can be understood that there are two first notches 213 , and the two first notches 213 correspond to the two opening arms 22 respectively. For example, the first notch 213 is a groove, and when the opening arm 22 is stretched to a set angle (that is, when the opening arm 22 is stretched in place), a part of the opening arm 22 will be embedded in the first notch. 213, thereby restricting the movement of the opening arm 22, so that the fixing effect of the opening arm 22 is better.

Optionally, as shown in FIG. 9 and FIG. 10 , the sliding part 221 is a chute 2211 extending along the length direction of the opening arm 22, and the matching part 211 is a post 2111, and the post 2111 is slidably fitted in the chute Inside 2211. It can be understood that there are two matching parts 211 (card posts 2111 ), and the two matching parts 211 respectively correspond to the sliding parts 221 (sliding slots 2211 ) on the two opening arms 22 . The spinous process fusion device of the embodiment of the present invention can facilitate the processing and manufacturing of the push rod 21 and the opening arm 22 by setting the sliding part 221 and the matching part 211 to the above structure, and the transmission is stable and the use effect is good.

Optionally, as shown in FIG. 9 and FIG. 10 , the opening arm 22 is provided with a second notch 222 , and when the opening arm 22 is stretched to a set angle, the clamping post 2111 snaps into the second notch part 222 to limit the movement of the opening arm 22 relative to the main body 1 . It can be understood that the second notch 222 is a groove, and the second notch 222 communicates with the sliding groove 2211, when the opening arm 22 is extended to a set angle (that is, when the opening arm 22 is extended to the position ), the clamping post 2111 will slide into the second notch 222 and engage with the second notch 222, so that the opening arm 22 can be further fixed, so as to reduce the loosening of the opening arm 22 and improve the Stability after implantation of a spinous process fusion device.

For example, as shown in FIGS. 1 and 2 , the opening arm assembly 2 also includes a pin 25 , the pin 25 passes through the main body 1 and is connected with the two opening arms 22 , and the axial direction of the pin 25 is aligned with the axis of the main body 1 . Orthogonally, the two opening arms 22 can swing around the axial direction of the pin 25, so that the assembly work of the opening arm assembly 2 can be facilitated.

In some embodiments, as shown in FIG. 6 , FIG. 7 , FIG. 19 and FIG. 20 , the movable arm assembly 3 includes a sliding sleeve 31 , a movable arm 32 and a rotating shaft 33 . The sliding sleeve 31 is arranged on the main body 1 and along the The axial position is adjustable, the movable arm 32 is arranged on the sliding sleeve 31, the rotating shaft 33 is passed through the rotating shaft hole 3211 on the movable arm 32 and connected with the sliding sleeve 31, the axial direction of the rotating shaft 33 is perpendicular to the axial direction of the main body 1 , the movable arm 32 can swing around the axial direction of the rotating shaft 33 . It can be understood that when the movable arm 32 is moved toward the direction of the opening arm 22 to clamp adjacent vertebrae, since the movable arm 32 can swing within a certain range, the movable arm 32 can better adapt to the vertebrae. The shape of the bone surface makes the movable arm 32 more fit to the vertebra bone surface, and the fixation effect is better.

Optionally, as shown in FIG. 19 , the movable arm 32 includes a swing sleeve 321 and two movable teeth 322, the swing sleeve 321 is sleeved on the sliding sleeve 31, and the two movable teeth 322 are respectively arranged on both sides of the swing sleeve 321, Movable teeth 322 are rotatable between the open position and the retracted position. In the retracted position, the length direction of the movable teeth 322 is parallel to the axial direction of the swing sleeve 321. The axes of 321 are orthogonal. For example, the movable tooth 322 is detachably connected with the swing sleeve 321 . In this embodiment, the movable tooth 322 is rotationally connected to the swing sleeve 321 through a pin shaft. The spinous process fusion device according to the embodiment of the present invention can make the movable arm 32 more fit to the vertebral bone surface by setting the movable teeth 322 as the above-mentioned structure, and because the movable teeth 322 are detachably connected, it can be used for different patients Selecting movable teeth 322 with different lengths makes the spinous process fusion device more applicable.

Optionally, the movable arm 32 includes a swing sleeve 321 and two movable teeth 322, the swing sleeve 321 is sleeved on the sliding sleeve 31, and the two movable teeth 322 are respectively arranged on both sides of the swing sleeve 321, the movable teeth 322 and the swing sleeve 321 is relatively fixed, and the length direction of the movable tooth 322 is perpendicular to the axial direction of the swing sleeve 321 . It can be understood that the swing sleeve 321 and the movable tooth 322 are integral structural parts, so that the structural design of the movable arm 32 is simple and convenient for assembly and processing.

Optionally, as shown in Fig. 11, Fig. 13, Fig. 19 and Fig. 20, a rack 12 is provided on the outer wall of the main body 1, the rack 12 extends along the axial direction of the main body 1, and the sliding sleeve 31 is provided with locking teeth 311 , the locking teeth 311 are elastically engaged with the rack 12 . For example, the tooth on the rack 12 is a ratchet, that is, the locking tooth 311 can only move in a direction toward the opening arm 22 . When the spinous process fusion device needs to be removed, a special tool can be used to separate the locking teeth 311 from the rack 12 , so that the movable arm assembly 3 can be separated from the main body 1 . The spinous process fusion device of the embodiment of the present invention can avoid the problem of retraction of the movable arm assembly 3 by connecting the sliding sleeve 31 with the main body 1 in the above manner, and improve the stability of the installation of the movable arm assembly 3 .

Optionally, the sliding sleeve 31 can be fixed on the main body 1 through a screw. It can be understood that the screw passes through the sliding sleeve 31 and abuts against the main body 1 so as to limit the movement of the sliding sleeve 31 relative to the main body 1 . When it is necessary to adjust the position of the sliding sleeve 31 , the screw can be loosened so that the screw is spaced from the main body 1 , thereby adjusting the position of the sliding sleeve 31 . The spinous process fusion device of the embodiment of the present invention can facilitate the processing and manufacture of the spinous process fusion device by connecting the sliding sleeve 31 with the main body 1 in the above manner, and the cost is low.

Optionally, as shown in Fig. 14 and Fig. 15, first tooth points 223 are provided on the two opening arms 22, and the first tooth points 223 are arranged at the end of the opening arm 22 away from the main body 1, and the first tooth points 223 can cooperate with the bone surface of the vertebra, so that the reliability of the connection between the opening arm 22 and the bone surface of the vertebra can be improved.

As shown in Figure 2 and Figure 19, the second tooth tip 3221 is provided on the two movable teeth 322, and the second tooth tip 3221 is arranged on the end of the movable tooth 322 away from the main body 1, and the second tooth tip 3221 can be connected to the vertebral surface Cooperate, so that the reliability of the connection between the movable teeth 322 and the vertebral bone surface can be improved.

In some embodiments, as shown in FIG. 11 , FIG. 12 and FIG. 13 , the main body 1 includes a first main body 13 and a second main body 14 , the second main body 14 is arranged at one end of the first main body 13 facing away from the opening arm 22 , and the second main body 13 A main body 13 and a second main body 14 are arranged coaxially, and the first main body 13 and the second main body 14 are detachably connected. It can be understood that the tail end of the main body 1 can be disassembled, so that after the spinous process fusion device is fixed, the second main body 14 can be disassembled from the first main body 13, so as to reduce the occupied space of the spinous process fusion device and reduce the The problem that the tail of the spinous process fusion device squeezes the intermuscular tissue improves the surgical effect.

Optionally, as shown in FIG. 11 , FIG. 12 and FIG. 13 , one of the first body 13 and the second body 14 is provided with a second locking protrusion 141 , and the other is provided with a second locking groove 131 , The second locking protrusion 141 is elastically engaged in the second locking slot 131 , and the second main body 14 can rotate relative to the first main body 13 so that the first locking protrusion 212 is disengaged from the second locking slot 131 . For example, the first main body 13 is provided with a second locking groove 131 , and the second main body 14 is provided with a second locking protrusion 141 . Specifically, there are two second card slots 131 and second card protrusions 141, the two second card slots 131 are arranged at intervals along the circumferential direction of the first body 13, and the two second card slots 131 and the two second card slots Convexities 141 are in one-to-one correspondence.

It can be understood that, as shown in FIG. 11 , FIG. 12 and FIG. 13 , the second locking groove 131 is elastically engaged with the second locking protrusion 141 , so that the second main body 14 can drive the first main body 13 to perform unidirectional rotation and lifting. Pull and other actions. When the second main body 14 rotates in reverse, the second locking protrusion 141 can be separated from the second locking slot 131 , so that the second main body 14 can be disassembled. The spinous process fusion device of the embodiment of the present invention connects the first main body 13 and the second main body 14 in the above manner, which can facilitate the installation and disassembly of the second main body 14 by the operator, and has simple structural design and convenient manufacturing.

In some embodiments, as shown in FIG. 7 and FIG. 11 , both the main body 1 and the push rod 21 are provided with a bone graft hole 214 , and the bone graft hole 214 communicates with the moving channel 11 . For example, there are multiple bone graft holes 214 , and the multiple bone graft holes 214 are arranged on the main body 1 or the push rod 21 at intervals. In this embodiment, the push rod 21 is provided with a hollow channel inside, and a plurality of bone grafting holes 214 extend in different directions and are all connected to the hollow channel, so as to promote the fusion effect of the vertebrae and the spinous process fusion device, and improve the performance of the spinous process fusion device. Stability after implantation.

Optionally, as shown in FIG. 11 , a threaded surface 132 is provided on the peripheral wall of the main body 1 , and the threaded surface 132 is adjacent to the second end of the main body 1 . For example, the threaded surface 132 is disposed on the first body 13 . In the spinous process fusion device of the embodiment of the present invention, by providing threaded surface 132 on the outer periphery of the first main body 13, it is convenient for the operator to screw the main body 1 between adjacent vertebrae, thereby shortening the operation time and improving the operation effect.

Optionally, the second end of the main body 1 (eg, the left end of the main body 1 in FIG. 1 ) is a sharp point, so that the main body 1 can be screwed into the vertebra easily, and the installation convenience of the spinous process fusion device is improved.

In this embodiment, the main body 1 is respectively provided with slots on both sides in the radial direction, and the slots extend along the axial direction of the main body 1. When the opening arms 22 are not opened, the two opening arms 22 can be respectively placed on the two sides One slot, so that the main body 1 can be easily screwed into the vertebrae, and the convenience of installation of the spinous process fusion device is improved.

Optionally, as shown in FIGS. 2 and 12 , a clamping groove 142 is provided on the peripheral wall of the main body 1 , and the clamping groove 142 is adjacent to the first end of the main body 1 . Specifically, the clamping groove 142 is disposed at an end of the second body 14 away from the first body 13 , and the clamping groove 142 may be an annular groove. The operator can use a special tool to clamp in the annular groove to place the spinous process fusion device at a designated position, so that the spinous process fusion device can be easily installed and disassembled, and the use effect is good.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, Unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

As used herein, the terms "one embodiment," "some embodiments," "example," "specific examples," or "some examples" mean specific features, structures, materials, or features described in connection with the embodiment or example. A feature is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (11)

1. A spinous process fusion device comprising:

the device comprises a main body, wherein a moving channel is arranged in the main body, and the moving channel penetrates through a first axial end of the main body;

the opening arm assembly comprises a push rod and two opening arms, the two opening arms are pivotally arranged at the second end of the main body, a sliding part is arranged on the opening arms, the push rod is arranged in the moving channel, the first end of the push rod is provided with a matching part which is in sliding fit with the sliding part, and the push rod can move along the axial direction of the moving channel so as to adjust the included angle between the opening arms and the axial direction of the main body;

the movable arm assembly is arranged on the main body and is used for limiting a clamping cavity with the opening arm.

2. The spinous process fusion device of claim 1 wherein the splayed arm assembly further comprises a pusher and a guide, the pusher and the guide both positioned within the movement channel, the pusher coupled to the second end of the pushrod, the guide having a guide aperture, the pushrod being non-rotatably threaded through the guide aperture, the pusher being movable in an axial direction of the movement channel to drive axial movement of the pushrod along the guide aperture.

3. The spinous process fusion device of claim 2 wherein at least one of the pusher and the guide is threadably engaged with the travel channel;

and/or the second end of the push rod is provided with a first clamping protrusion, a first clamping groove is formed in the pushing piece, and the first clamping protrusion is elastically clamped with the first clamping groove.

4. The spinous process fusion device of claim 2 wherein the pusher and the guide are each threadably engaged with the travel channel, the pusher having a first stepped surface and the guide having a second stepped surface, the guide having a first state in which the pusher is spaced from the guide and the pusher is operable to move the pusher axially of the guide aperture and a second state in which the first stepped surface is urged against the second stepped surface and the pusher is operable to rotate the guide to move the pusher axially of the guide aperture and rotate relative to the travel channel to distract and lock the distraction arm.

5. The spinous process fusion device of claim 4 wherein the first end of the pushrod has a first notch and at least a portion of the splayed arms snap into the first notch when the splayed arms are splayed to a set angle to limit movement of the splayed arms relative to the body;

and/or, the opening arm is provided with a second notch part, and when the opening arm is opened to a set angle, at least part of the matching part is clamped into the second notch part so as to limit the opening arm to move relative to the main body;

and/or the sliding part is a sliding groove, the sliding groove extends along the length direction of the opening arm, the matching part is a clamping column, and the clamping column is in sliding fit in the sliding groove;

and/or one end of the pushing piece far away from the guide piece is provided with a driving groove;

and/or a limiting piece is arranged in the guide hole and is matched with the push rod to limit the push rod to rotate relative to the guide hole.

6. The spinous process fusion device of any one of claims 1-5 wherein a position of the moveable arm assembly along an axial direction of the body is adjustable to adjust a size of the clamp cavity.

7. The spinous process fusion device of claim 6 wherein the moveable arm assembly comprises a sliding sleeve, a moveable arm and a rotating shaft, the sliding sleeve is disposed on the main body and is adjustable in position along the axial direction of the main body, the moveable arm is disposed on the sliding sleeve, the rotating shaft is disposed on the moveable arm in a penetrating manner and is connected with the sliding sleeve, the axial direction of the rotating shaft is orthogonal to the axial direction of the main body, and the moveable arm is swingable around the axial direction of the rotating shaft.

8. The spinous process fusion device of claim 7 wherein the moveable arm comprises a swing sleeve and two moveable teeth, the swing sleeve being sleeved on the sliding sleeve, the two moveable teeth being disposed on either side of the swing sleeve, the moveable teeth being rotatable between an open position in which a length direction of the moveable teeth is parallel to an axial direction of the swing sleeve and a retracted position in which a length direction of the moveable teeth is orthogonal to the axial direction of the swing sleeve;

or the movable arm comprises a swing sleeve and two movable teeth, the swing sleeve is sleeved on the sliding sleeve, the two movable teeth are respectively arranged on two sides of the swing sleeve, the movable teeth are relatively fixed with the swing sleeve, and the length direction of the movable teeth is orthogonal with the axial direction of the swing sleeve;

and/or the outer wall surface of the main body is provided with a rack, the rack extends along the axial direction of the main body, the sliding sleeve is provided with a latch, and the latch is elastically clamped with the rack.

9. The spinous process fusion device of any one of claims 1-8, the body comprising a first body and a second body, the second body disposed at an end of the first body facing away from the splayed arms, the first body and the second body coaxially disposed, and the first body detachably connected to the second body.

10. The spinous process fusion device of claim 9 wherein one of the first body and the second body has a second detent thereon and the other has a second detent, the second detent resiliently snap-engaging within the second detent, the second body rotatable relative to the first body to disengage the second detent from the second detent.

11. The spinous process fusion device of any one of claims 1-8 wherein the body and the pushrod are each provided with a bone grafting hole in communication with the travel channel;

and/or, a thread surface is arranged on the peripheral wall of the main body, and the thread surface is adjacent to the second end of the main body;

and/or the second end of the main body is a tip;

and/or, a clamping groove is arranged on the peripheral wall of the main body, and the clamping groove is adjacent to the first end of the main body;

and/or, one end of the opening arm far away from the main body is provided with a first tooth tip.

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