CN211213704U

CN211213704U - Front-back combined atlantoaxial fusion device

Info

Publication number: CN211213704U
Application number: CN201921798765.9U
Authority: CN
Inventors: 袁博文
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-08-11
Anticipated expiration: 2029-10-24

Abstract

The utility model provides a front and back unite extensive region dentata and fuse device, include: the occipital neck fusion plate comprises an occipital plate, two connecting plates and a cervical plate, wherein the two connecting plates are respectively connected to two ends of the occipital plate, the cervical plate is bridged on the two connecting plates, and the two connecting plates are respectively provided with a first connecting hole; the bridging plate is provided with a second connecting hole; and the bridging screw is used for connecting the pillow neck fusion plate and the bridging plate together through the first connecting hole and the second connecting hole. The technical scheme of the utility model solved effectively that the atlantoaxial fusion device among the prior art is connected the back atress inequality and lead to the problem of becoming invalid easily with the skeleton.

Description

Front-back combined atlantoaxial fusion device

Technical Field

The utility model relates to a technical field of atlantoaxial particularly, relates to a front and back joint atlantoaxial fusion device.

Background

The dislocation of the atlantoaxial joint means that the joint between the first section (atlas) and the second section (epistropheus) of the cervical vertebra loses the normal involution relationship, thereby causing the medulla oblongata and the high cervical spinal cord to be pressed, and the trend of the vertebral artery and the hemodynamics to be changed; dizziness or syncope may occur in mild cases, and paralysis of limbs and even exhaustion of breath may result in severe cases. Because of its disability and high lethality rate, atlantoaxial joint dislocation is one of the hot spots and difficulties in spinal surgery research worldwide. Atlantoaxial joint fusion is currently recognized as the most effective method for treating atlantoaxial joint dislocation. The atlantoaxial joint posterior fusion is convenient to expose, large in operation space and wide in clinical application. With the development of the technology in recent years, fusion surgery for anterior joint has been increasing.

The 3D printing technology is widely used in the field of orthopedics, and people can select more than one in the reduction operation of the atlantoaxial joint, and the customized steel plate is used in the posterior fusion operation. In the prior art, the atlantoaxial device is usually fixed on the bone, but multiple clinical practices prove that the structure easily causes uneven stress on the implant, and leads to fatigue damage and failure or loosening of the unilateral prosthesis.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a front and back unite atlantoaxial fusion device to solve the uneven problem that leads to becoming invalid easily of atress behind atlantoaxial fusion device among the prior art and the bone connection.

In order to achieve the above object, the utility model provides a front and back unite extensive region dentata and fuse device, include: the occipital neck fusion plate comprises an occipital plate, two connecting plates and a cervical plate, wherein the two connecting plates are respectively connected to two ends of the occipital plate, the cervical plate is bridged on the two connecting plates, and the two connecting plates are respectively provided with a first connecting hole; the bridging plate is provided with a second connecting hole; and the bridging screw is used for connecting the pillow neck fusion plate and the bridging plate together through the first connecting hole and the second connecting hole.

Furthermore, the occipital plate is an arc-shaped plate, and the two connecting plates are respectively connected to two ends of the arc-shaped plate to form a U-shaped structure.

Further, the thickness of the occipital plate is the same, and the occipital plate conforms to the contour of the occipital bone so that the occipital plate fits the occipital bone.

Further, the occipital plate is provided with a plurality of screw holes.

Further, the first connection hole and/or the second connection hole have an elongated threaded sleeve.

Further, the lengthened thread bush is a locking thread.

Further, the connecting plate includes a first plate section and a second plate section, the first plate section is disposed between the second plate section and the occipital plate, and the first plate section and the second plate section form a predetermined angle.

Further, a cervical plate is connected at the junction of the first and second plate segments.

Further, the predetermined angle is between 120 ° and 170 °.

Furthermore, the bridging board is two corresponding with two connecting plates, all is provided with the second connecting hole on each bridging board.

Use the technical scheme of the utility model, the occipital bone is supported by the occipital bone board, and the cervical vertebra is supported by the cervical bone board, and occipital bone board and cervical bone board link together through two connecting plates and form occipital neck fused plate. Pillow neck fusion board is located the rear side of cervical vertebra, and the bridging plate is located the front side of cervical vertebra, and bridging screw passes from the skeleton gap of cervical vertebra and links together pillow neck fusion board and bridging plate, and the bridging plate receives the spacing of cervical vertebra, makes the atress of pillow neck fusion board and bridging plate more even like this, and pillow neck fusion board is difficult to the inefficacy. The technical scheme of the utility model solved effectively that the atlantoaxial fusion device among the prior art is connected the back atress inequality and lead to the problem of becoming invalid easily with the skeleton.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

figure 1 shows a schematic perspective view of an embodiment of a anteroposterior combined atlantoaxial fusion device according to the present invention;

FIG. 2 shows another angled perspective view of the anteroposterior combined atlantoaxial fusion device of FIG. 1;

FIG. 3 shows a schematic view of the occipital cervical fusion plate of the anteroposterior combined atlantoaxial fusion device of FIG. 1;

FIG. 4 shows a schematic structural view of a bridge plate of the anteroposterior combined atlantoaxial fusion device of FIG. 1; and

figure 5 shows a schematic structural view of the bridging screw of the anteroposterior combined atlantoaxial fusion device of figure 1.

Wherein the figures include the following reference numerals:

10. a pillow neck fusion plate; 11. an occipital plate; 12. a connecting plate; 13. a cervical plate; 20. a bridging plate; 30. bridging the screws.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

As shown in fig. 1 to 5, an anteroposterior combined atlantoaxial fusion device of the present embodiment includes: occipital fusion plate 10, bridge plate 20 and bridge screw 30. Occipital neck fused plate 10 includes occipital plate 11, two connecting plates 12 and napus board 13, and two connecting plates 12 are connected respectively at occipital plate 11's both ends, and napus board 13 cross-over connection all is provided with first connecting hole on two connecting plates 12. The bridge plate 20 is provided with a second coupling hole. The bridging screw 30 connects the occipital fusion plate 10 and the bridging plate 20 together through the first and second coupling holes.

By applying the technical scheme of the embodiment, the occiput is supported by the occipital plate 11, the cervical vertebra is supported by the cervical plate 13, and the occipital plate 11 and the cervical plate 13 are connected together through the two connecting plates 12 to form the occipital-cervical fusion plate 10. Pillow neck fused plate 10 is located the rear side of cervical vertebra, and bridging plate 20 is located the front side of cervical vertebra, and bridging screw 30 passes from the skeleton gap of cervical vertebra to link together pillow neck fused plate 10 and bridging plate 20, and bridging plate 20 receives the spacing of cervical vertebra, makes pillow neck fused plate 10 and bridging plate 20's atress relatively even like this, and pillow neck fused plate 10 is difficult to the inefficacy. The technical scheme of this embodiment has solved the problem that uneven atress leads to losing efficacy easily after extensive region axis vertebra fusion device and the bone are connected among the prior art effectively.

As shown in fig. 1 to 3, in the technical solution of the present embodiment, the occipital plate 11 is an arc-shaped plate, and two connecting plates 12 are respectively connected to two ends of the arc-shaped plate to form a U-shaped structure. The above structure makes the pillow neck fusion plate 10 lighter in weight and less in material used.

As shown in fig. 1 to 3, in the technical solution of the present embodiment, the thickness of the occipital plate 11 is the same, and the occipital plate 11 conforms to the contour of the occipital bone so that the occipital plate 11 fits the occipital bone. The same thickness of the occipital plate 11 results in the same ability to withstand the forces. The occipital plate 11 is in contact with the occiput, which results in better occipital support by the occipital plate 11.

As shown in fig. 1 to 3, in the present embodiment, the occipital plate 11 is provided with a plurality of screw holes. The structure can reduce foreign body sensation after implantation.

As shown in fig. 1 to 5, in the solution of the present embodiment, the first connection hole and/or the second connection hole has an elongated threaded sleeve. The provision of an extended threaded sleeve provides greater stability to the bridging screw 30. It should be noted that, first connecting hole and second connecting hole all are provided with extension thread bush, and the first end of bridging screw 30 has the screw thread, and the second end is the hexagonal groove, and when bridging screw 30 penetrated to the second connecting hole from first connecting hole, the inner wall of first connecting hole can be the unthreaded hole, and the inner wall of second connecting hole has the locking screw thread, and the locking screw thread of this embodiment is the screw thread that has the slope. When the bridge screw 30 passes from the second connection hole to the first connection hole, an inner wall of the second connection hole may be a unthreaded hole, and the inner wall of the first connection hole has a locking thread.

As shown in fig. 3, in the solution of the present embodiment, the connection plate 12 includes a first plate section and a second plate section, the first plate section is disposed between the second plate section and the occipital plate 11, and the first plate section and the second plate section form a predetermined angle. So that the connecting plate 12 can be better fitted to the cervical vertebrae. Specifically, the junction of first plate section and second plate section is the arc transition, and is better to the suitability of cervical vertebra like this. The predetermined angle is between 120 degrees and 170 degrees, so that the cervical vertebra can be well matched.

In the solution of the embodiment, the cervical plate 13 is attached at the junction of the first and second plate sections, as shown in fig. 3. The above structure makes the occipital neck fusion plate 10 have better suitability for the cervical vertebrae.

As shown in fig. 4, in the solution of the present embodiment, two bridging plates 20 are provided corresponding to the two connecting plates 12, and each bridging plate 20 is provided with a second connecting hole. The arrangement of the two connecting plates 12 makes the arrangement of the anterior-posterior combined atlantoaxial fusion device more flexible. The plane of each bridging plate 20 and cervical vertebra matched with all is provided with concave-convex structure, and bridging plate 20 is difficult to deviate from original position like this.

Can know through the aforesaid, occipital bone board 11 of this embodiment hugs closely occipital bone downwardly extending, arranges a screw hole along the downwardly extending, and plate body thickness keeps unanimous, when guaranteeing occipital bone board 11's intensity, effectively reduces the prosthetic implantation back incisura, does benefit to the postoperative and sews up, can effectively reduce the foreign matter sense after the implantation simultaneously. The connecting plate 12 serves to connect the cervical vertebrae and the spine, and may be provided with guide screw holes to allow accurate placement of the nail into the pedicle of the atlas. The centrum fixed plate is the H template, and the intermediate portion is hugged closely with centrum spinous process, can play the effect of location in the art, sets up screw guide screw hole simultaneously, can put into the spinous process with the screw accuracy, and both sides are two guide screw holes, can accurately put into pedicle of vertebral arch or side piece with the screw, and guide screw hole's effect need not to readjust in the art to put the nail direction, and the planning before the art can guarantee to put the safety and effectiveness of nail direction simultaneously, guarantees the safety and validity that the false body was implanted. The left and right connecting plates 12 of the atlantoaxial fusion device are respectively tightly attached to the atlas and the axis (correspondingly designed after reverse modeling by CT), the thickness of the plate body is consistent, the strength of the plate body is ensured, the incisura after the prosthesis is implanted is reduced, and the foreign body sensation after the prosthesis is implanted can be effectively reduced. The left and right side connecting plates 12 of the atlantoaxial fusion system are provided with a series of screw holes, screws can be placed in the screw holes to be fixed with the atlantoaxial and the epistrophia after reset respectively, and the screw holes are provided with petal self-locking mechanisms, are screwed into corresponding self-locking screws and can be matched with taper threads at the tail parts of the self-locking screws to carry out universal locking. The connecting plates 12 on the left side and the right side are arranged in an inverted splayed shape, one screw hole is arranged in the atlas part, a screw can be placed into the atlas lateral mass, two vertical screw holes are arranged in the axis part, and the screw can be placed into the centrum. The length of the bridging screw 30 is a pre-operative customized length, the length of which can ensure that the bridging screw can just sink into the connecting plates 12 at the left and right sides of the anterior-posterior combined atlantoaxial fusion device while the threaded part thereof is matched with the thread of the posterior occipital cervical fusion system, and the length of the screw cannot exceed the threaded hole of the anterior-posterior combined atlantoaxial fusion device. The anterior-posterior combined atlantoaxial fusion device is made of titanium alloy.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An anteroposterior combined atlantoaxial fusion device, comprising:

the pillow neck fusion plate (10) comprises a pillow plate (11), two connecting plates (12) and a neck plate (13), wherein the two connecting plates (12) are respectively connected to two ends of the pillow plate (11), the neck plate (13) is bridged on the two connecting plates (12), and the two connecting plates (12) are respectively provided with a first connecting hole;

the bridge plate (20), there are second attachment holes on the said bridge plate (20);

a bridge screw (30), the bridge screw (30) connecting the occipital fusion plate (10) and the bridge plate (20) together through the first and second connection holes.

2. The anteroposterior combined atlantoaxial fusion device according to claim 1, wherein the occipital plate (11) is an arc-shaped plate, and the two connection plates (12) are connected to both ends of the arc-shaped plate, respectively, to form a U-shaped structure.

3. The anteroposterior combined atlantoaxial fusion device of claim 2, wherein the thickness of the occipital plate (11) is the same, and the occipital plate (11) conforms to the contour of the occipital bone such that the occipital plate (11) conforms to the occipital bone.

4. The anteroposterior combined atlantoaxial fusion device of claim 3, wherein a plurality of screw holes are provided on the occipital plate (11).

5. The anteroposterior combined atlantoaxial fusion device of claim 1, wherein the first attachment hole and/or the second attachment hole has an elongated threaded collar.

6. The anteroposterior combined atlantoaxial fusion device of claim 5, wherein the elongated threaded collar is a locking thread.

7. The anteroposterior combined atlantoaxial fusion device of claim 1, wherein the attachment plate (12) comprises a first plate segment and a second plate segment, the first plate segment being disposed between the second plate segment and the occipital plate (11), the first plate segment and the second plate segment being at a predetermined angle.

8. The anteroposterior combined atlantoaxial fusion device of claim 7, wherein the cervical plate (13) is connected at the junction of the first and second plate segments.

9. The anteroposterior combined atlantoaxial fusion device of claim 7, wherein the predetermined angle is between 120 ° and 170 °.

10. The anteroposterior combined atlantoaxial fusion device according to claim 1, wherein the number of the bridge plates (20) is two corresponding to the two connection plates (12), and each of the bridge plates (20) is provided with a second connection hole.