CN219126893U - Zero notch fusion ware of cervical vertebra - Google Patents

Abstract

The application relates to the technical field of medical instruments and discloses a cervical vertebra zero-notch fusion device, which comprises a fusion device main body and a fixing body in buckle connection with the fusion device main body; the fixing body is rectangular block-shaped, clamping arms extend from two ends of the fixing body respectively, and a hook part extends inwards from one end of the clamping arm far away from the fixing body; the side wall of the fusion device main body is provided with a slide way for the clamping arm to slide, the fusion device main body is also provided with a clamping groove for the clamping of the hook part, and the clamping groove is communicated with the slide way. The micro-motion device has the effect of achieving micro-motion of the fusion device main body and the fixing body in a small range.

Description

Zero notch fusion ware of cervical vertebra

Technical Field

The application relates to the technical field of medical instruments, in particular to a cervical vertebra zero-notch fusion device.

Background

The anterior cervical intervertebral excision decompression is a surgical routine operation of cervical vertebra, and has become a common means for treating cervical spondylosis due to small surgical trauma, high safety and good effect.

When the anterior cervical interbody excision decompression is performed, the fusion device is implanted between vertebrae, the common zero-notch fusion device is of an integrated structure of a fusion device main body and a fixing body, two fixing holes are obliquely formed in the fixing body, a self-tapping locking screw is arranged in each fixing hole, and the fusion device is fixed on the vertebrae by means of the self-tapping locking screw, so that the zero-notch fusion device can be effectively fixed and fused.

However, the integrated structure of the fusion device main body and the fixing body does not allow the initial vertebral body to be jogged during implantation, and the vertebral body jogging can cause unfused phenomenon, so that the postoperative fusion rate and the practical application effect of the zero-notch fusion device are affected.

Disclosure of Invention

In order to achieve micro-motion in a small range of a fusion cage main body and a fixing body, the application provides a cervical vertebra zero-notch fusion cage.

The application provides a zero notch of cervical vertebra fuses ware adopts following technical scheme:

a cervical vertebra zero-notch fusion device comprises a fusion device main body and a fixing body which is in buckle connection with the fusion device main body;

the fixing body is rectangular block-shaped, clamping arms extend from two ends of the fixing body respectively, and a hook part extends inwards from one end of the clamping arm far away from the fixing body;

the side wall of the fusion device main body is provided with a slide way for the clamping arm to slide, the fusion device main body is also provided with a clamping groove for the clamping of the hook part, and the clamping groove is communicated with the slide way.

Through adopting above-mentioned technical scheme, the centre gripping arm slides along the slide, and at the slip in-process, the centre gripping arm elastic deformation gradually opens, and after the centre gripping arm opened completely, continue to slide along the slide until couple portion gets into in the draw-in groove, couple portion buckle in the draw-in groove, and the fixed body is fixed with the fusion ware main part. The clamping arm and the hook part can fix the fusion device main body and the fixing body, and can ensure that a micro-motion space in a small range exists between the fixing body and the fusion device main body, thereby being beneficial to the micro-motion of the vertebral body in the initial stage of implantation of the zero-notch fusion device and effectively improving the postoperative fusion rate of the zero-notch fusion device.

Optionally, the slide way comprises an inclined slide way and a vertical slide way, one end of the inclined slide way is communicated with the outside of the fusion device main body, the other end of the inclined slide way is communicated with the vertical slide way, and one end of the vertical slide way far away from the inclined slide way is communicated with the clamping groove;

the inclined slide way is vertically inclined along the direction gradually far away from the main body of the fusion device.

By adopting the technical scheme, the inclined slide way is arranged so that the clamping arm has a gradual change process from an initial state to a completely opened state, and the possibility of fracture caused by sudden complete opening of the clamping arm can be effectively avoided. Simultaneously, the inclined slideway is also beneficial to the sliding of the clamping arm along the slideway.

Optionally, the side of the hook portion, which is close to the fixed body, is a horizontal plane, and the side of the hook portion, which is far away from the fixed body, is processed and formed into an arc-shaped surface.

Through adopting above-mentioned technical scheme, after the draw-in groove is gone into to couple portion card, the horizontal plane of couple portion and the top surface laminating of draw-in groove, the bottom surface butt of the arcwall face draw-in groove of couple portion, the stability of couple is guaranteed to the arcwall face of couple portion, can provide the advantage for the fine motion between fixed body and the fusion ware main part again.

Optionally, the main body of the fusion device is U-shaped, a side surface of the main body of the fusion device is processed and formed into a bionic arc surface, and the circle center of the circle of the arc where the bionic arc surface is located in the main body of the fusion device.

By adopting the technical scheme, the bone graft is conveniently placed into the middle opening of the fusion device main body, so that better inter-bone fusion conditions are provided, and the bionic arc-shaped surface is more matched with the anatomical structure of the centrum bone and is convenient to implant.

Optionally, a reinforcing rib is provided on an inner sidewall of the cage body.

Through adopting above-mentioned technical scheme, the plane that the stiffening rib is located is on a parallel with the plane that the fusion ware main part is located, and the stiffening rib can strengthen the intensity of use of fusion ware main part, prolongs the life of fusion ware main part.

Optionally, a plurality of teeth are respectively arranged on the side surface of the fusion device main body, which is away from the bionic arc surface, and the bionic arc surface.

By adopting the technical scheme, the teeth can promote the growth of joints, thereby achieving better fusion effect

Optionally, a through hole is formed in the bionic arc-shaped surface of the fusion device main body, the through hole penetrates through the fusion device main body, and a positioning needle is arranged in the through hole.

By adopting the technical scheme, the positioning needle is convenient for positioning and is also beneficial to fixing the bone graft

Optionally, the length of the clamping groove is greater than the width of the hook part, and both ends of the clamping groove are processed and formed into an arc shape.

Through adopting above-mentioned technical scheme, when opening the draw-in groove in the fusion ware main part, can be at the interior residual part piece of draw-in groove, circular-arc tip is favorable to the discharge of interior piece of draw-in groove more, and the clearance is more convenient.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through setting up the fusion cage main part and the fixed body that is connected with fusion cage main part buckle, can fix fusion cage main part and fixed body, can guarantee again that there is the micro-motion space in a small range between fixed body and the fusion cage main part, be favorable to zero-notch fusion cage to implant initial stage's centrum micro-motion, can effectively improve zero-notch fusion cage's postoperative fusion rate again;

2. by arranging the inclined slide way and the vertical slide way, the inclined slide way is arranged so that a gradual change process exists between the initial state and the fully opened state of the clamping arm, and the possibility of fracture caused by sudden and complete opening of the clamping arm can be effectively avoided;

3. by arranging the bionic arc-shaped surface, the bionic arc-shaped surface is more matched with the anatomical structure of the vertebral bone and is convenient for implantation.

Drawings

Fig. 1 is a schematic structural view of the first embodiment.

Fig. 2 is an exploded view of the first embodiment.

Fig. 3 is a schematic view of the structure of a cage body according to an embodiment.

FIG. 4 is a schematic view of a cage body according to another embodiment

Fig. 5 is a schematic structural diagram of the second embodiment.

Fig. 6 is a schematic structural diagram of a second embodiment of a fixing body.

Fig. 7 is a partial sectional view of a second embodiment fixing body.

Reference numerals illustrate: 1. a cage body; 11. bionic arc-shaped surface; 12. a horizontal plane; 13. teeth; 14. a slideway; 141. an inclined slideway; 142. a vertical slideway; 15. a clamping groove; 16. reinforcing ribs; 2. a fixed body; 21. a fixing hole; 22. a clamping arm; 23. a hook part; 24. a limiting hole; 25. a limit groove; 26. fixing the clamping head; 27. a holding notch; 3. a positioning needle; 4. a limit screw; 5. a limiting pin; 51. a slip groove; 52. and a limit notch.

Detailed Description

In the description of the present application, it should be noted that the terms "horizontal," "vertical," "near," "far," "upper," "lower," "inner," and the like are based on the relative relationships shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the process or module in question must have a specific orientation, state, and operation, and thus should not be construed as limiting the present utility model. The present application is described in further detail below in conjunction with figures 1-7.

Embodiment one:

the embodiment of the application discloses a cervical vertebra zero notch fusion device.

Referring to fig. 1 and 2, a cervical vertebra zero-notch fusion device comprises a fusion device main body 1 and a fixing body 2 which is in buckling connection with the fusion device main body 1, wherein micro-motion in a small range can be realized between the fusion device main body 1 and the fixing body 2. A plurality of fixing holes 21 are formed in the fixing body 2 at intervals, and a self-tapping locking screw (not shown in the figure) is arranged in each fixing hole 21 and can be fixed on the vertebral body, so that the zero-notch fusion device can be effectively fixed and fused.

Referring to fig. 2 and 3, the main body 1 of the fusion device is in a U shape, one side surface of the main body 1 of the fusion device is processed and molded into a bionic arc surface 11, the other side surface is processed and molded into a horizontal surface 12, and the center of a circle of an arc where the bionic arc surface 11 is located in the main body 1 of the fusion device. A plurality of teeth 13 are sequentially arranged on the bionic arc-shaped surface 11 and the horizontal surface 12 of the fusion cage main body 1 at intervals.

Referring to fig. 2, the intermediate opening of the cage body 1 facilitates the insertion of bone graft to provide better fusion conditions between bones, the bionic arcuate surface 11 more conforms to the anatomy of the vertebral bone and facilitates implantation, and the teeth 13 promote the growth of the joint to achieve better fusion.

Referring to fig. 2 and 4, a through hole penetrating through the main body 1 of the fusion device is further formed in the side surface of the main body 1 of the fusion device, and a positioning needle 3 is arranged in the through hole, so that the positioning needle 3 is convenient for positioning and is also beneficial for fixing a bone graft.

Referring to fig. 4, a reinforcing rib 16 is provided on the inner sidewall of the cage body 1, and the plane of the reinforcing rib 16 is parallel to the plane of the cage body 1, and the reinforcing rib 16 can strengthen the use strength of the cage body 1 and prolong the service life of the cage body 1.

Referring to fig. 2, the fixing body 2 is rectangular and block-shaped, each corner of the fixing body 2 is formed into an arc-shaped corner, in this embodiment, four fixing holes 21 are equally spaced along the length direction of the fixing body 2, the fixing holes 21 are all inclined holes, and the inclination angles of the two fixing holes 21 located at two sides are opposite to the inclination angles of the two fixing holes 21 located at the middle position.

Referring to fig. 2, the fixing holes 21 with opposite inclination angles can facilitate the bidirectional fixing of the zero-notch fusion device, and compared with the common two-nail zero-notch fusion device, the four-nail zero-notch fusion device has more fixing positions with the vertebral bodies, and the zero-notch fusion device is more stable to fix.

Referring to fig. 2, the holding arms 22 extend from both ends of the fixed body 2, and the hook portions 23 are provided at ends of the holding arms 22 away from the fixed body 2. The axis of the clamping arms 22 is perpendicular to the line where the length direction of the fixed body 2 is located, and the hook portion 23 on each clamping arm 22 extends vertically along the direction approaching the other clamping arm 22.

The side surface of the hook part 23, which is close to the fixed body 2, is a horizontal surface 12, and the side surface of the hook part 23, which is far away from the fixed body 2, is processed and molded into an arc-shaped side surface.

Referring to fig. 2 and 3, a slide rail 14 adapted to the clamp arm 22 and a clip groove 15 adapted to the hook portion are formed in the outer wall of the cage body 1. One end of the slideway 14 is communicated with the outside of the fusion device main body 1, and the other end of the slideway 14 is communicated with the clamping groove 15. The slide 14 includes an inclined slide 141 and a vertical slide 142, the inclined slide 141 is vertically inclined in a direction gradually away from the opening of the cage body 1, one end of the inclined slide 141 is communicated to the outside of the cage body 1, and the other end is communicated with the vertical slide 142.

Referring to fig. 2 and 3, an end of the vertical slide 142 remote from the inclined slide 141 communicates with the clamping groove 15, a center line of the clamping groove 15 is perpendicular to a center line of the slide 14, and a depth of the clamping groove 15 is deeper than a depth of the slide 14. Both ends of the clamping groove 15 are processed and molded into an arc shape, and the length of the clamping groove 15 is larger than the width of the hook part 23.

Referring to fig. 1 and 2, the clamping arm 22 of the fixing body 2 can slide along the slideway 14 on the fusion apparatus main body 1, in the process that the clamping arm 22 slides along the inclined slideway 141, the clamping arm 22 is gradually elastically deformed and opened, when the clamping arm 22 slides to the vertical slideway 142, the clamping arm 22 is completely opened, the clamping arm 22 continues to slide until the hook part 23 enters the clamping groove 15, the plane of the hook part 23 is attached to the top surface of the clamping groove 15, and the arc surface of the hook part 23 is abutted to the bottom surface of the clamping groove 15.

Under the cooperation of the clamping arm 22 and the slideway 14 and the cooperation of the hook part 23 and the clamping groove 15, the fixing body 2 and the fusion device main body 1 are not easy to loosen and fall off after being connected, and the connection between the fixing body 2 and the fusion device main body 1 is more stable.

The implementation principle of the zero notch fusion device for the cervical vertebra of the embodiment of the application is as follows: the clamping arm 22 slides along the direction of the slideway 14, and as the clamping arm 22 slides continuously, the clamping arm 22 starts to deform elastically and expand, and as the clamping arm 22 slides continuously, the hook part 23 enters the clamping groove 15 and is buckled with the clamping groove 15. The clamp arm 22 that passes through can be fixed body 2 and fusion ware main part 1, has the fine motion space in the small circle again between fusion ware main part 1 and the fixed body 2 simultaneously, is favorable to implanting the initial stage centrum fine motion, can effectively improve the postoperative fusion rate of zero notch fusion ware.

Embodiment two:

the difference between this embodiment and the first embodiment is that:

referring to fig. 5 and 6, in the present embodiment, two fixing holes 21 are formed, the two fixing holes 21 are formed at intervals along the length direction of the fixing body 2, the two fixing holes 21 are inclined holes, and the inclination angles of the two fixing holes 21 are opposite.

Referring to fig. 6 and 7, a limiting hole 24 and a limiting groove 25 are further formed in the fixing body 2 at a side of each fixing hole 21 near the other fixing hole 21, and the limiting hole 24 is communicated with the limiting groove 25.

Referring to fig. 6 and 7, the limiting holes 24 are inclined holes, and the inclination direction of the limiting hole 24 corresponding to each fixing hole 21 is identical to the inclination direction of the fixing hole 21, and the limiting holes 24 are opened from top to bottom. A limit screw 4 is connected in the limit hole 24 in a threaded manner, and one end of the limit screw 4, which is far away from the nut, is a plane.

Referring to fig. 6 and 7, the limiting grooves 25 are also inclined holes, and the limiting grooves 25 corresponding to each fixing hole 21 are inclined from top to bottom in a direction away from the fixing hole 21. A limiting pin 5 is arranged in the limiting groove 25, the limiting pin 5 is cylindrical, a sliding groove 51 is formed in one end face of the limiting pin 5 along the axial direction of the limiting pin 5, and the peripheral face of the limiting screw 4 can be abutted against the groove face of the sliding groove 51 and slide along the length direction of the sliding groove 51.

Referring to fig. 6 and 7, a limiting notch 52 is formed on the end surface of the limiting pin 5 where the limiting groove 25 is formed, and the limiting notch 52 makes the end of the limiting pin 5 be stepped so as to limit the self-tapping locking screw entering the fixing hole 21.

Referring to fig. 6 and 7, in use, a spring (not shown) is first placed in the limit slot 25, then the limit pin 5 is placed in the limit slot 25, one side of the sliding slot 51 on the limit pin 5 is required to be communicated with the limit hole 24, and one end of the limit notch 52 of the limit pin 5 is far away from the limit hole 24. And then the limit screw 4 is screwed into the limit hole 24, and after the limit screw 4 is completely screwed in, the peripheral surface of the limit screw 4 is abutted with the groove surface of the sliding groove 51.

Referring to fig. 6 and 7, at this time, under the action of the spring top, one end of the limiting notch 52 of the limiting pin 5 extends out of the limiting groove 25, when the self-tapping locking screw needs to be installed, the self-tapping locking screw is installed into the fixing hole 21, along with the continuous screwing of the self-tapping locking screw, the nut part of the self-tapping locking screw presses one end of the limiting notch 52 of the limiting pin 5, the spring in the limiting groove 25 is also continuously compressed, and after the self-tapping locking screw is completely screwed in, the nut of the self-tapping locking screw is clamped at the limiting notch 52, and under the elastic action of the spring, the self-tapping locking screw is stably fixed in the fixing hole 21.

Referring to fig. 5 and 6, two fixing clips 26 are integrally formed at one side of the fixing body 2 away from the fusion device main body 1, the two fixing clips 26 are respectively located at two sides of the fixing body 2, the fixing clips 26 protrude out of the fixing body 2, and when in use, the fixing clips 26 can be shielded at the outer edge of the vertebral body to prevent the zero-notch fusion device from being implanted too deeply.

Two holding notches 27 are symmetrically formed in the middle position of one side, away from the fusion device main body 1, of the fixing body 2, the two holding notches 27 are respectively located on two sides of the fixing body 2, and the holding notches 27 are convenient for holding of the holding device.

The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.

Claims (8)

1. The utility model provides a zero notch fusion ware of cervical vertebra which characterized in that: comprises a fusion device main body (1) and a fixing body (2) which is in buckle connection with the fusion device main body (1);

the fixing body (2) is rectangular and blocky, clamping arms (22) are respectively extended at two ends of the fixing body (2), and a hook part (23) is extended inwards at one end of the clamping arms (22) far away from the fixing body (2);

the side wall of the fusion device main body (1) is provided with a slide way (14) for the clamping arm (22) to slide, the fusion device main body (1) is also provided with a clamping groove (15) for the clamping of the hook part (23), and the clamping groove (15) is communicated with the slide way (14).

2. The cervical vertebra zero notch fusion apparatus of claim 1, wherein: the slideway (14) comprises an inclined slideway (141) and a vertical slideway (142), one end of the inclined slideway (141) is communicated with the exterior of the fusion device main body (1), the other end of the inclined slideway is communicated with the vertical slideway (142), and one end of the vertical slideway (142) far away from the inclined slideway (141) is communicated with the clamping groove (15);

the inclined slide way (141) is vertically and obliquely arranged along the direction gradually far away from the fusion device main body (1).

3. The cervical vertebra zero notch fusion apparatus of claim 2, wherein: the side surface of the hook part, which is close to the fixed body (2), is a horizontal surface (12), and the side surface of the hook part, which is far away from the fixed body (2), is processed and molded into an arc-shaped surface.

4. The cervical vertebra zero notch fusion apparatus of claim 1, wherein: the novel fusion device comprises a fusion device body (1), wherein the fusion device body (1) is U-shaped, one side surface of the fusion device body (1) is processed and formed into a bionic arc-shaped surface (11), and the circle center of a circle where an arc is located in the fusion device body (1).

5. The cervical vertebra zero notch fusion apparatus of claim 4, wherein: a reinforcing rib (16) is arranged on the inner side wall of the fusion device main body (1).

6. The cervical vertebra zero notch fusion apparatus of claim 4, wherein: the side surface of the fusion device main body (1) deviating from the bionic arc-shaped surface (11) and the bionic arc-shaped surface (11) are provided with a plurality of teeth (13).

7. The cervical vertebra zero notch fusion apparatus of claim 6, wherein: the bionic arc-shaped surface (11) of the fusion device main body (1) is provided with a through hole, the through hole penetrates through the fusion device main body (1), and a positioning needle (3) is arranged in the through hole.

8. The cervical vertebra zero notch fusion apparatus of claim 1, wherein: the length of the clamping groove (15) is larger than the width of the hook part (23), and both ends of the clamping groove (15) are processed and molded into an arc shape.

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