CN219763654U - spinous process fusion device - Google Patents

Abstract

The utility model discloses a spinous process fusion device, comprising: the fixed part, the movable component and the fixed teeth. The mounting comprises a fixed body and a mounting part which are connected, the mounting part extends along the thickness direction of the fixed body, the movable assembly comprises a movable part and a locking part, a mounting hole is formed in the movable part, the mounting part is arranged in the mounting hole in a penetrating mode, the locking part is arranged on the movable part and is movable between a release position and a locking position, the release position is adjustable in the axial direction of the movable part, the angle between the inner side surface of the movable part and the axial plane orthogonal to the mounting part is adjustable, the locking position is relatively fixed between the fixed body and the movable part, and the fixed teeth are rotatably arranged on the inner side surface of at least one of the fixed body and the movable part. The spinous process fusion device disclosed by the utility model is simple in structural design, higher in fitting degree with the spinous process and better in fusion effect.

Description

Spinous process fusion device

Technical Field

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

Background

Spinal stenosis is a disease in which the spinal canal narrows and compresses the spinal cord and nerves, which is typically caused by degenerative changes of the spine. Spinal stenosis may also be caused by herniated disk, osteoporosis, tumors, or other unexpected, intense activity, among others. For the above-mentioned spinal disorders, the surgeon may restore the normal spacing between adjacent vertebrae by means of a fusion device for therapeutic purposes. However, in the related art, the structure of the fusion device is complex, the fitting degree of the fusion device and the spinous process is poor, and the fusion effect of the fusion device and the vertebra is poor and the stability is poor.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the utility model provides the spinous process fusion device which is simple in structural design, high in fitting degree with the spinous process and good in fusion effect.

An embodiment of the utility model provides a spinous process fusion device comprising: the fixing piece comprises a fixing body and a mounting part which are connected, and the mounting part extends along the thickness direction of the fixing body; the movable assembly comprises a movable part and a locking part, wherein the movable part is provided with a mounting hole, the mounting part is arranged in the mounting hole in a penetrating manner, the locking part is arranged on the movable part and can move between a release position and a locking position, the position of the movable part along the axial direction of the mounting part in the release position is adjustable, the angle between the inner side surface of the movable part and a plane orthogonal to the axial direction of the mounting part is adjustable, and the fixed body and the movable part in the locking position are relatively fixed; and the fixed teeth are rotatably arranged on the inner side surface of at least one of the fixed body and the movable piece.

According to the spinous process fusion device provided by the embodiment of the utility model, when the spinous process fusion device is in the release position, the angle between the inner side surface of the movable piece and the plane orthogonal to the axial direction of the mounting part is adjustable, so that the inner side surface of the movable piece can be more attached to the physiological curved surface of the spinous process. In addition, as the fixed teeth can rotate relative to the fixed body and/or the movable piece, the rotation angle of the fixed teeth can be adjusted to be better attached to the bone surface of the spinous process, so that the locking effect of the fixed teeth and the spinous process is improved. Therefore, the spinous process fusion device and the bone surface of the spinous process of the embodiment of the utility model have good bonding effect, so that the implanted spinous process fusion device is more stable, and the fusion effect of the spinous process fusion device and vertebrae is improved.

In some embodiments, the mounting portion is provided with a guide groove, the guide groove extends along the axial direction of the mounting portion, the movable member is provided with a limiting protrusion, the limiting protrusion is matched in the guide groove, and in the release position, the movable member can drive the limiting protrusion to move along the length direction of the guide groove.

In some embodiments, the limiting protrusion is located on a side of the mounting hole away from the locking member, the limiting protrusion is a cylinder, and in the release position, the movable member is swingable around an axial direction of the limiting protrusion, so that an angle between an inner side surface of the movable member and a plane orthogonal to the axial direction of the mounting portion is adjustable; and/or the limiting protrusion is detachably arranged on the movable piece.

In some embodiments, a first tooth surface is provided on an outer wall surface of the mounting portion, a second tooth surface is provided on an end surface of the locking member, the first tooth surface is spaced apart from the second tooth surface in the release position, and the first tooth surface abuts against the second tooth surface in the locking position; and/or the locking piece is a threaded piece, a threaded hole is formed in the movable piece, and the threaded piece is screwed in the threaded hole; and/or the outer wall surface of the mounting part is provided with a third tooth surface, the inner wall surface of the mounting hole is provided with a fourth tooth surface, and in the locking position, the third tooth surface is propped against the fourth tooth surface.

In some embodiments, the fixed teeth comprise a first fixed tooth and a second fixed tooth, the first fixed tooth is spherically hinged to the fixed body, and the second fixed tooth is spherically hinged to the movable member.

In some embodiments, the first fixed teeth and the second fixed teeth each include a ball head and a tooth tip that are connected, ball sockets are disposed on inner sides of the fixed body and the movable member, the ball heads are elastically clamped in the ball heads and rotatable relative to the ball heads, and the tooth tips extend out of the ball sockets.

In some embodiments, an elastic groove is formed in one surface of the ball head adjacent to the tooth tip; and/or the plurality of tooth points are arranged on the ball head at intervals; and/or the number of the first fixed teeth is two, the two first fixed teeth are arranged on two sides of the fixed body at intervals along the length direction of the fixed body, the number of the second fixed teeth is two, and the two second fixed teeth are arranged on two sides of the movable piece at intervals along the length direction of the movable piece.

In some embodiments, a bone grafting channel is arranged in the mounting part, the bone grafting channel penetrates through the mounting part along the axial direction of the mounting part, a bone grafting window is arranged on the periphery of the mounting part, and the bone grafting window is communicated with the bone grafting channel.

In some embodiments, the fixed body includes a first inner side surface and a second inner side surface, the movable member includes a third inner side surface and a fourth inner side surface, the first inner side surface and the second inner side surface are arranged along a width direction of the fixed body, the third inner side surface and the fourth inner side surface are arranged along the width direction of the movable member, the first inner side surface is opposite to the third inner side surface and defines a first clamping cavity, the second inner side surface is opposite to the fourth inner side surface and defines a second clamping cavity, the first clamping cavity is gradually flared along a direction away from the second clamping cavity, and the second clamping cavity is gradually flared along a direction away from the first clamping cavity.

In some embodiments, the first inner side surface includes an angle with a plane orthogonal to an axial direction of the mounting portion that is greater than 0 degrees and less than or equal to 10 degrees; an included angle between the third inner side surface and a plane orthogonal to the axial direction of the mounting portion is greater than 0 degrees and less than or equal to 10 degrees; an included angle between the second inner side surface and a plane orthogonal to the axial direction of the mounting portion is greater than 0 degrees and less than or equal to 60 degrees; the angle between the fourth inner side surface and a plane orthogonal to the axial direction of the mounting portion is greater than 0 degrees and less than or equal to 60 degrees.

Drawings

Fig. 1 is an isometric view of a spinous process fusion device of an embodiment of the utility model.

Fig. 2 is a front view of a spinous process fusion device of an embodiment of the utility model.

Fig. 3 is a schematic view of a fixation element of a spinous process fusion device of an embodiment of the utility model.

Fig. 4 is a schematic view of another view of a fixation member of a spinous process fusion device of an embodiment of the utility model.

Fig. 5 is a schematic view of the movable member of the spinous process fusion device of an embodiment of the utility model.

Fig. 6 is an exploded view of a spinous process fusion device of an embodiment of the utility model.

Fig. 7 is a cross-sectional view of a spinous process fusion device of an embodiment of the utility model taken through a locking member.

Fig. 8 is a schematic view of a locking member of a spinous process fusion device of an embodiment of the utility model.

Fig. 9 is a front view of a locking member of the spinous process fusion device of an embodiment of the utility model.

Fig. 10 is a schematic view of the fixation teeth of the spinous process fusion device of an embodiment of the utility model.

Fig. 11 is a front view of the fixation teeth of the spinous process fusion device of an embodiment of the utility model.

Fig. 12 is a cross-sectional view of a spinous process fusion device of an embodiment of the utility model taken through a socket.

Fig. 13 is an isometric view of a spinous process fusion device of another embodiment of the utility model.

Fig. 14 is a front view of another embodiment of the spinous process fusion device of the utility model.

Reference numerals:

1. a fixing member; 11. a fixed body; 111. a first inner side; 112. a second inner side; 113. a first ball socket; 12. a mounting part; 121. a guide groove; 122. a first tooth surface; 123. a third tooth surface; 124. a bone grafting channel; 125. bone grafting window; 13. a first clamping cavity; 14. a second clamping cavity;

2. a movable assembly; 21. a movable member; 211. a mounting hole; 212. a limit protrusion; 213. a fourth tooth surface; 214. a second ball socket; 215. a third inner side; 216. a fourth inner side; 217. a threaded hole; 22. a locking member; 221. a second tooth surface; 3. a fixed tooth; 31. a first fixed tooth; 32. a second fixed tooth; 33. ball head; 34. tooth tips; 35. an elastic groove.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A spinous process fusion device according to an embodiment of the present utility model is described below with reference to fig. 1-14.

As shown in fig. 1 to 7, the spinous process fusion device according to the embodiment of the present utility model includes: a fixed part 1, a movable component 2 and fixed teeth 3. The fixing member 1 includes a fixing body 11 and a mounting portion 12 connected to each other, and the movable assembly 2 includes a movable member 21 and a locking member 22, and a mounting hole 211 is provided in the movable member 21.

The mounting portion 12 extends in the thickness direction (e.g., a direction a in fig. 2) of the fixing body 11, and the mounting portion 12 is penetrated into the mounting hole 211. A locking member 22 is provided on the movable member 21 and is movable between a release position and a locking position. In the release position, the position of the movable member 21 in the axial direction of the mounting portion 12 (as in the direction a in fig. 2) is adjustable, and the angle between the inner side surface of the movable member 21 and a plane orthogonal to the axial direction of the mounting portion 12 is adjustable; in the locked position, the fixed body 11 is fixed relative to the movable member 21. The fixed teeth 3 are rotatably provided on an inner side surface of at least one of the fixed body 11 and the movable member 21.

The side of the movable member 21 opposite to the fixed body 11, i.e., the inner side of the movable member 21. The surface of the fixed body 11 opposite to the movable member 21 is the inner side surface of the fixed body 11.

It will be appreciated that in the release position, as shown in fig. 6 and 7, the mounting portion 12 is in clearance fit with the mounting hole 211, so that the mounting portion 12 can move in the axial direction of the mounting portion 12, and also can swing relative to the inner side of the fixed body 11, thereby facilitating better engagement of the inner side of the movable member 21 with the spinous process. In the locked position, the movable member 21 can be fixed by the locking member 22, thereby avoiding the problem of loosening of the movable member 21.

According to the spinous process fusion device of the embodiment of the utility model, when the spinous process fusion device is in the release position, the angle between the inner side surface of the movable piece 21 and the plane orthogonal to the axial direction of the mounting part 12 is adjustable, so that the inner side surface of the movable piece 21 can be more attached to the physiological curved surface of the spinous process. In addition, since the fixed teeth 3 are rotatable relative to the fixed body 11 and/or the movable member 21, the locking effect of the fixed teeth 3 and the spinous process can be improved by adjusting the rotation angle of the fixed teeth 3 to better fit the bone surface of the spinous process. Therefore, the spinous process fusion device and the bone surface of the spinous process of the embodiment of the utility model have good bonding effect, so that the implanted spinous process fusion device is more stable, and the fusion effect of the spinous process fusion device and vertebrae is improved.

For example, the fixing teeth 3 are provided separately on the inner side surface of the fixing body 11. For another example, the fixed teeth 3 are provided separately on the inner side surface of the movable member 21. For another example, the fixed teeth 3 are plural, a part of the fixed teeth 3 are provided on the fixed body 11, and the other part of the fixed teeth 3 are provided on the movable member 21.

In some embodiments, as shown in fig. 4 and 5, the mounting portion 12 is provided with a guide groove 121, the guide groove 121 extends along the axial direction of the mounting portion 12, the movable member 21 is provided with a limiting protrusion 212, the limiting protrusion 212 is fitted in the guide groove 121, and in the release position, the movable member 21 can drive the limiting protrusion 212 to move along the length direction of the guide groove 121. It will be appreciated that the guide groove 121 may provide a guide for the movement of the movable member 21, so that the movable member 21 may be restricted from rotating in the axial direction of the mounting portion 12, thereby improving the accuracy of the movement of the movable member 21.

Specifically, as shown in fig. 4 and 5, the limiting projection 212 is located on a side of the mounting hole 211 facing away from the locking member 22, the limiting projection 212 is a cylinder, and in the release position, the movable member 21 is swingable around an axial direction of the limiting projection 212 so that an angle between an inner side surface of the movable member 21 and a plane orthogonal to the axial direction of the mounting portion 12 is adjustable. It will be appreciated that the axial direction of the limiting projection 212 is perpendicular to the axial direction of the mounting portion 12, and in the release position, the movable member 21 swings with the limiting projection 212 as a rotation fulcrum, and after the movable member 21 swings to a proper position, the movable member 21 can be locked by the locking member 22. The spinous process fusion device of the embodiment of the utility model can facilitate the adjustment and fixation of the movable piece 21 by an operator by arranging the limit protrusion 212 in the structure, and has simple structural design and convenient processing and manufacturing.

Optionally, a stop tab 212 is removably provided on the moveable member 21. For example, the limiting boss 212 is a stud, and the limiting boss 212 is mounted on the movable member 21 by screw-fitting.

In some embodiments, as shown in fig. 3, 8 and 9, a first tooth surface 122 is provided on the outer wall surface of the mounting portion 12, a second tooth surface 221 is provided on the end surface of the lock member 22, the first tooth surface 122 is spaced apart from the second tooth surface 221 in the released position, and the first tooth surface 122 abuts against the second tooth surface 221 in the locked position. The spinous process fusion device of the embodiment of the utility model can improve the reliability of the connection between the locking piece 22 and the mounting part 12 in the locked state by arranging the first tooth surface 122 and the second tooth surface 221, so that the friction force between the locking piece 22 and the mounting part 12 is increased, and the locking effect is enhanced.

Alternatively, the first tooth surface 122 may be a matrix-type tine structure. The tines may be in a plurality of rows and the angle between the tines and the axial direction of the locking member 22 may be at least one of 45 °, 60 ° and 90 °, thereby further enhancing the locking effect of the locking member 22 and the mounting portion 12 and improving the reliability of the spinous process fusion device after implantation.

Alternatively, as shown in fig. 5 and 8, the locking member 22 is a threaded member, and the movable member 21 is provided with a threaded hole 217, and the threaded member is screwed into the threaded hole 217. For example, the axial direction of the lock 22 is perpendicular to the axial direction of the mounting portion 12. In other words, the first tooth surface 122 of the locking member 22 is in perpendicular contact with the second tooth surface 221 of the mounting portion 12, and when the locking member 22 presses the mounting portion 12, the first tooth surface 122 can be elastically deformed to be embedded into the second tooth surface 221, so that the locking effect of the spinous process fusion device can be further improved.

Alternatively, as shown in fig. 4 and 5, the outer wall surface of the mounting portion 12 is provided with a third tooth surface 123, the inner wall surface of the mounting hole 211 is provided with a fourth tooth surface 213, and in the locked position, the third tooth surface 123 abuts against the fourth tooth surface 213. The spinous process fusion device of the embodiment of the utility model can further improve the friction force between the locking piece 22 and the mounting part 12 in the locked state of the spinous process fusion device by arranging the third tooth surface 123 and the fourth tooth surface 213, so that the locking effect of the spinous process fusion device is better.

In some embodiments, as shown in fig. 1, 2 and 12, the fixed teeth 3 include a first fixed tooth 31 and a second fixed tooth 32, the first fixed tooth 31 being spherically hinged to the fixed body 11, the second fixed tooth 32 being spherically hinged to the movable member 21. It can be appreciated that the first fixing teeth 31 and the second fixing teeth 32 can both rotate in three-dimensional space, so that the first fixing teeth 31 and the second fixing teeth 32 can be better attached to the bone surface, and the bone fusion effect is improved.

Alternatively, as shown in fig. 10 to 12, the first fixed tooth 31 and the second fixed tooth 32 each include a ball head 33 and a tooth tip 34 that are connected, the inner sides of the fixed body 11 and the movable member 21 are respectively provided with a ball socket, the ball head 33 is elastically clamped in the ball head 33 and rotatable relative to the ball head 33, and the tooth tip 34 extends out of the ball socket. Specifically, the fixed body 11 is provided with a first ball socket 113 therein, and the movable member 21 is provided with a second ball socket 214 therein. The first fixed tooth 31 is mounted in the first socket 113 and the second fixed tooth 32 is mounted in the second socket 214. It will be appreciated that the ball 33 or socket is resilient, and when the spinous process fusion device is assembled, the ball 33 can be pressed and inserted into the socket, thereby saving space of the spinous process fusion device and facilitating installation.

Alternatively, as shown in fig. 10 and 11, the face of the ball 33 adjacent to the tooth tip 34 is provided with an elastic groove 35. The elastic groove 35 may be in a straight shape or in a cross shape. When the ball 33 is inserted into the socket, the elastic groove 35 is elastically deformed by applying an external force to the outer circumference of the ball 33, thereby facilitating the operator to insert the ball 33 into the socket.

Alternatively, as shown in fig. 10 and 11, the plurality of tooth tips 34 are plural, and the plurality of tooth tips 34 are arranged on the ball head 33 at intervals. For example, the tooth tips 34 may be spaced apart along the circumference of the ball head 33 to further enhance the firmness of the engagement of the fixation teeth 3 with the bone surface.

Alternatively, as shown in fig. 1 and 2, the number of first fixed teeth 31 is two, the two first fixed teeth 31 are arranged at intervals on both sides of the fixed body 11 in the length direction (e.g., the direction B in fig. 2) of the fixed body 11, the number of second fixed teeth 32 is two, and the two second fixed teeth 32 are arranged at intervals on both sides of the movable member 21 in the length direction (e.g., the direction B in fig. 2) of the movable member 21. The spinous process fusion device provided by the embodiment of the utility model can improve the reliability of the connection between the spinous process fusion device and the spinous process and the fusion effect by arranging the two first fixing teeth 31 and the two second fixing teeth 32.

In some embodiments, as shown in fig. 1 and 2, a bone grafting channel 124 is provided in the mounting portion 12, the bone grafting channel 124 penetrates the mounting portion 12 along the axial direction of the mounting portion 12, a bone grafting window 125 is provided on the outer periphery of the mounting portion 12, and the bone grafting window 125 communicates with the bone grafting channel 124. It will be appreciated that the bone graft window 125 and the bone graft channel 124 may promote bone in-growth, and may also implant artificial bone or foreign bone into the bone graft channel 124, so that the spinous process fusion device has a better fusion effect with the spinous process, and the stability of the spinous process fusion device after implantation is improved.

In some embodiments, as shown in fig. 13 and 14, the fixed body 11 includes a first inner side 111 and a second inner side 112, the movable member 21 includes a third inner side 215 and a fourth inner side 216, the first inner side 111 and the second inner side 112 are arranged along a width direction (e.g., a C direction in fig. 14) of the fixed body 11, the third inner side 215 and the fourth inner side 216 are arranged along a width direction (e.g., a C direction in fig. 14) of the movable member 21, the first inner side 111 is opposite to the third inner side 215 and defines the first clamping cavity 13, and the second inner side 112 is opposite to the fourth inner side 216 and defines the second clamping cavity 14. The first clamping cavity 13 is gradually flared along the direction away from the second clamping cavity 14, and the second clamping cavity 14 is gradually flared along the direction away from the first clamping cavity 13. It can be appreciated that by arranging the fixed body 11 and the movable member 21 in the above structure, the spinous process fusion device according to the embodiment of the present utility model can make the spinous process fusion device more fit with the physiological curved surface of the spinous process, and improve the fusion effect of the spinous process fusion device.

Alternatively, as shown in fig. 14, the first inner side surface 111 forms an angle with a plane orthogonal to the axial direction of the mounting portion 12 of greater than 0 degrees and 10 ° or less. For example, the first inner side surface 111 forms an angle of 1 °, 5 °, or 10 ° with a plane orthogonal to the axial direction of the mounting portion 12.

The angle between the third inner side surface 215 and a plane orthogonal to the axial direction of the mounting portion 12 is greater than 0 degrees and equal to or less than 10 °. For example, the angle between the third inner side surface 215 and a plane orthogonal to the axial direction of the mounting portion 12 is 1 °, 5 °, or 10 °.

The second inner side surface 112 forms an angle with a plane orthogonal to the axial direction of the mounting portion 12 of greater than 0 degrees and 60 degrees or less. For example, the angle between the second inner side surface 112 and a plane orthogonal to the axial direction of the mounting portion 12 is 10 °, 30 °, or 60 °.

The angle between the fourth inner side surface 216 and a plane orthogonal to the axial direction of the mounting portion 12 is greater than 0 degrees and equal to or less than 60 degrees. For example, the angle between the fourth inner side surface 216 and a plane orthogonal to the axial direction of the mounting portion 12 is 10 °, 30 °, or 60 °.

Through experimental study, the inventor of the present utility model finds that when the inner side surfaces of the fixed body 11 and the movable member 21 are set to adopt the above-mentioned deflection angle range, the spinous process fusion device can meet the use requirements of most patients, and the adhesion degree of the spinous process fusion device and the spinous process bone surface is higher, and the stability after implantation is better.

Optionally, anti-slip layers are sprayed on the fixed part 1 and the movable part 21, so that the roughness of the fixed part 1 and the movable part 21 is increased, the friction force is enhanced, and the bone fusion effect of the spinous process fusion device is improved.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A spinous process fusion device comprising:

the fixing piece comprises a fixing body and a mounting part which are connected, and the mounting part extends along the thickness direction of the fixing body;

the movable assembly comprises a movable part and a locking part, wherein the movable part is provided with a mounting hole, the mounting part is arranged in the mounting hole in a penetrating manner, the locking part is arranged on the movable part and can move between a release position and a locking position, the position of the movable part along the axial direction of the mounting part in the release position is adjustable, the angle between the inner side surface of the movable part and a plane orthogonal to the axial direction of the mounting part is adjustable, and the fixed body and the movable part in the locking position are relatively fixed;

and the fixed teeth are rotatably arranged on the inner side surface of at least one of the fixed body and the movable piece.

2. The spinous process fusion device of claim 1, wherein the mounting portion is provided with a guide groove, the guide groove extends along the axial direction of the mounting portion, the movable member is provided with a limiting protrusion, the limiting protrusion is matched in the guide groove, and in the release position, the movable member can drive the limiting protrusion to move along the length direction of the guide groove.

3. The spinous process fusion device of claim 2 wherein the stop tab is located on a side of the mounting hole facing away from the locking member, the stop tab being cylindrical and wherein in the released position the moveable member is swingable about an axial direction of the stop tab such that an angle between an inner side of the moveable member and a plane orthogonal to the axial direction of the mounting portion is adjustable;

and/or the limiting protrusion is detachably arranged on the movable piece.

4. The spinous process fusion device of claim 1 wherein a first tooth surface is provided on an outer wall surface of the mounting portion and a second tooth surface is provided on an end surface of the locking member, the first tooth surface being spaced apart from the second tooth surface in the release position and the first tooth surface being in abutment with the second tooth surface in the locking position;

and/or the locking piece is a threaded piece, a threaded hole is formed in the movable piece, and the threaded piece is screwed in the threaded hole;

and/or the outer wall surface of the mounting part is provided with a third tooth surface, the inner wall surface of the mounting hole is provided with a fourth tooth surface, and in the locking position, the third tooth surface is propped against the fourth tooth surface.

5. The spinous process fusion device of claim 1 wherein the fixed tooth comprises a first fixed tooth and a second fixed tooth, the first fixed tooth being spherically articulated with the fixed body and the second fixed tooth being spherically articulated with the moveable member.

6. The spinous process fusion device of claim 5 wherein the first fixed tooth and the second fixed tooth each comprise a ball head and a tooth tip connected, wherein ball sockets are disposed on inner sides of the fixed body and the movable member, the ball heads are elastically clamped in the ball heads and rotatable relative to the ball heads, and the tooth tips extend out of the ball sockets.

7. The spinous process fusion device of claim 6 wherein the ball head has an elastic groove on a side adjacent the tooth tip;

and/or the plurality of tooth points are arranged on the ball head at intervals;

and/or the number of the first fixed teeth is two, the two first fixed teeth are arranged on two sides of the fixed body at intervals along the length direction of the fixed body, the number of the second fixed teeth is two, and the two second fixed teeth are arranged on two sides of the movable piece at intervals along the length direction of the movable piece.

8. The spinous process fusion device of claim 1 wherein the mounting portion has a bone grafting channel disposed therein, the bone grafting channel extending through the mounting portion in an axial direction of the mounting portion, a bone grafting window disposed on an outer periphery of the mounting portion, the bone grafting window in communication with the bone grafting channel.

9. The spinous process fusion device of any one of claims 1-8 wherein the fixed body includes a first inner side and a second inner side, the movable member includes a third inner side and a fourth inner side, the first inner side and the second inner side are aligned along a width direction of the fixed body, the third inner side and the fourth inner side are aligned along a width direction of the movable member,

the first inner side face is opposite to the third inner side face and is used for limiting a first clamping cavity, the second inner side face is opposite to the fourth inner side face and is used for limiting a second clamping cavity, the first clamping cavity is gradually flared along the direction deviating from the second clamping cavity, and the second clamping cavity is gradually flared along the direction deviating from the first clamping cavity.

10. The spinous process fusion device of claim 9 wherein the first medial surface forms an angle with a plane orthogonal to an axial direction of the mounting portion of greater than 0 degrees and less than or equal to 10 degrees;

an included angle between the third inner side surface and a plane orthogonal to the axial direction of the mounting portion is greater than 0 degrees and less than or equal to 10 degrees;

an included angle between the second inner side surface and a plane orthogonal to the axial direction of the mounting portion is greater than 0 degrees and less than or equal to 60 degrees;

the angle between the fourth inner side surface and a plane orthogonal to the axial direction of the mounting portion is greater than 0 degrees and less than or equal to 60 degrees.