Anterior-posterior atlantoaxial fusion device

Abstract

The present invention provides an anterior-posterior combined atlantoaxial fusion device, comprising: an occipital-cervical fusion plate, the occipital-cervical fusion plate comprising an occipital plate and two connecting plates, the occipital plate being an arc-shaped structure, the two connecting plates being respectively connected to the two ends of the occipital plate; a connecting piece, the first end of the connecting piece being connected to the occipital-cervical fusion plate; an atlantoaxial support fusion device, the atlantoaxial support fusion device being connected to the second end of the connecting piece, the atlantoaxial support fusion device having a compression position and an open support position. The technical solution of the present invention effectively solves the problem of easy failure caused by uneven force after the atlantoaxial fusion device in the prior art is connected to the bone.

Description

Technical Field

[0001] The present invention relates to the technical field of atlantoaxial fusion, and in particular to an anterior-posterior combined atlantoaxial fusion device. Background Art

[0002] Atlantoaxial dislocation refers to the loss of normal apposition between the first segment (atlas) and the second segment (axis) of the cervical spine, which causes compression of the medulla oblongata and the high cervical spinal cord, changes in the direction of the vertebral artery and hemodynamics; in mild cases, dizziness or syncope may occur, and in severe cases, it may lead to quadriplegia or even respiratory failure and death. Due to its high disability and mortality rates, atlantoaxial dislocation is one of the hot spots and difficulties in spinal surgery research worldwide. Atlantoaxial fusion is currently recognized as the most effective method for treating atlantoaxial dislocation. Posterior atlantoaxial fusion is easy to expose and has a large operating space, and is widely used in clinical practice. With the development of technology in recent years, the number of fusions used for anterior joints has gradually increased.

[0003] The widespread use of 3D printing technology in the field of orthopedics has also given people more options in atlantoaxial joint reduction surgery, using customized steel plates in posterior fusion. In the existing technology, the atlantoaxial device is usually fixed to the bone for fixation, but it has been proven through many clinical practices that such a structure is prone to uneven force on the implant, resulting in fatigue damage, failure or loosening of the unilateral prosthesis. Summary of the invention

[0004] The main purpose of the present invention is to provide an anterior-posterior combined atlantoaxial fusion device to solve the problem that the atlantoaxial fusion device in the prior art is prone to failure due to uneven force after being connected to the bone.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an anterior-posterior combined atlantoaxial fusion device, comprising: an occipital-cervical fusion plate, the occipital-cervical fusion plate comprising an occipital plate and two connecting plates, the occipital plate being an arc-shaped structure, and the two connecting plates being respectively connected to the two ends of the occipital plate; a connecting piece, a first end of the connecting piece being connected to the occipital-cervical fusion plate; an atlantoaxial support fusion device, the atlantoaxial support fusion device being connected to the second end of the connecting piece, and the atlantoaxial support fusion device having a compressed position and an open support position.

[0006] Furthermore, both connecting plates are provided with connecting holes, the connecting pieces are bridging bolts, and the first ends of the bridging bolts have nuts that match the connecting holes.

[0007] Furthermore, the second end of the bridging bolt has an external thread, and the atlantoaxial support fusion device has a connecting hole with an internal thread matched with the external thread.

[0008] Furthermore, the atlantoaxial support fusion device includes a shell and a resisting member arranged in the shell, the shell has a compression position and a supporting position where the resisting member resists the shell to be opened, the resisting member has a connecting hole with an internal thread, and the shell has an opening to avoid the connecting hole.

[0009] Furthermore, the shell includes an upper pressure cover and a connecting ring, the connecting ring is a barrel-shaped structure, the upper pressure cover is at least partially nested in the connecting ring, the first end of the connecting ring has a first inner flange, and the lower end of the upper pressure cover has a first outer flange. When the abutting piece abuts against the inner wall of the upper pressure cover, the first inner flange can cooperate with the first outer flange to prevent the upper pressure cover from falling out of the connecting ring.

[0010] Furthermore, the upper end of the upper pressure cover has a second outer flange, and the first inner flange can move between the first outer flange and the second outer flange.

[0011] Furthermore, the shell also includes a lower pressure cover, which is at least partially nested in the connecting ring. The second end of the connecting ring has a second inner flange, and the upper end of the lower pressure cover has a third outer flange. When the abutting piece abuts against the inner wall of the lower pressure cover, the second inner flange can cooperate with the third outer flange to prevent the lower pressure cover from falling out of the connecting ring.

[0012] Furthermore, the lower end of the lower pressure cover has a fourth outer flange, and the second inner flange can move between the third outer flange and the fourth outer flange.

[0013] Furthermore, the connecting member is an ellipsoid, and the axis of the connecting hole coincides with the short axis of the ellipsoid.

[0014] Furthermore, both ends of the ellipsoid have a first plane perpendicular to the long axis of the ellipsoid, and a second plane matching the first plane is arranged on the inner wall of the shell.

[0015] Furthermore, the occipital-cervical fusion plate also includes a cervical bone plate, which is connected to the two connecting plates.

[0016] Furthermore, the cervical bone plate is an H-shaped structure, and the two ends of the upper part of the H-shaped structure are respectively connected to the two connecting plates correspondingly.

[0017] Furthermore, the two connecting plates are arranged at an acute angle with the H-shaped structure.

[0018] Furthermore, the occipital plate, the two connecting plates and the cervical plate are an integrally formed structure.

[0019] By applying the technical solution of the present invention, the occipital bone is supported by the occipital plate, and the connecting plate, the connecting piece and the atlantoaxial support fusion device jointly fix the occipital plate. The atlantoaxial support fusion device is in a compressed position during installation. After installation, the atlantoaxial support fusion device is opened to a supporting position through operation, so that the atlantoaxial support fusion device, the connecting piece and the connecting plate can jointly and stably support and fix the occipital plate, so that the atlantoaxial fusion device is connected to the bone with uniform force and is not easily damaged. The technical solution of the present invention effectively solves the problem in the prior art that the atlantoaxial fusion device is easily ineffective due to uneven force after being connected to the bone. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 It shows a schematic diagram of the assembly structure of an embodiment of an anterior-posterior combined atlantoaxial fusion device according to the present invention;

[0022] Figure 2 Shows Figure 1 A schematic structural diagram of the anterior-posterior combined atlantoaxial fusion device from another angle;

[0023] Figure 3 Shows Figure 1 A schematic diagram of the overall structure of the atlantoaxial support fusion device of the anterior-posterior combined atlantoaxial fusion device;

[0024] Figure 4 Shows Figure 3 Schematic diagram of the exploded structure of the atlantoaxial support fusion device;

[0025] Figure 5 Shows Figure 3 A cross-sectional schematic diagram of the compressed position of the atlantoaxial support fusion device;

[0026] Figure 6 Shows Figure 3 A cross-sectional schematic diagram of the support position of the atlantoaxial support fusion device;

[0027] Figure 7 Shows Figure 1 A schematic diagram of the structure of the connecting piece of the anterior-posterior combined atlantoaxial fusion device; and

[0028] Figure 8 Shows Figure 1 Schematic diagram of the structure of the occipitocervical fusion plate of the anterior-posterior combined atlantoaxial fusion device.

[0029] The above drawings include the following reference numerals:

[0030] 10. Occipital-cervical fusion plate; 11. Occipital plate; 12. Connecting plate; 13. Cervical plate; 20. Connecting piece; 30. Atlantoaxial support fusion device; 31. Shell; 311. Upper pressure cover; 312. Connecting ring; 313. Lower pressure cover; 32. Abutment piece. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0033] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0034] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for clarity, the thickness of the layers and regions is enlarged, and the same reference numerals are used to represent the same devices, so their description will be omitted.

[0035] like Figures 1 to 8As shown, the anterior-posterior combined atlantoaxial fusion device of this embodiment includes: an occipital-cervical fusion plate 10, a connector 20 and an atlantoaxial support fusion device 30. The occipital-cervical fusion plate 10 includes an occipital plate 11 and two connecting plates 12. The occipital plate 11 is an arc-shaped structure. The two connecting plates 12 are respectively connected to the two ends of the occipital plate 11. The first end of the connector 20 is connected to the occipital-cervical fusion plate 10. The atlantoaxial support fusion device 30 is connected to the second end of the connector 20. The atlantoaxial support fusion device 30 has a compressed position and an open support position.

[0036] By applying the technical solution of this embodiment, the occipital bone is supported by the occipital plate 11, and the connecting plate 12, the connecting piece 20 and the atlantoaxial support fusion device 30 jointly fix the occipital plate 11. The atlantoaxial support fusion device 30 is in a compressed position during installation. After installation, the atlantoaxial support fusion device 30 is opened in a supporting position through operation, so that the atlantoaxial support fusion device 30, the connecting piece 20 and the connecting plate 12 can jointly and stably support and fix the occipital plate 11, so that the atlantoaxial fusion device is connected to the bone with uniform force and is not easily damaged. The technical solution of this embodiment effectively solves the problem of the atlantoaxial fusion device in the prior art being easily failed due to uneven force after being connected to the bone.

[0037] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, in the technical solution of this embodiment, the two connecting plates 12 are provided with connecting holes, the connecting member 20 is a bridging bolt, and the first end of the bridging bolt has a nut matched with the connecting hole. The above structure is easy to process and has a low manufacturing cost. The connecting hole has a certain length along the axial direction of the bridging bolt, so that the contact area of ​​the connecting hole to the bridging bolt is large, and the fixing effect is better.

[0038] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, in the technical solution of this embodiment, the second end of the bridging bolt has an external thread, and the atlantoaxial support fusion device 30 has a connecting hole with an internal thread that matches the external thread. The above structure has low processing cost and is easy to operate.

[0039] like Figures 3 to 6 As shown, in the technical solution of this embodiment, the atlantoaxial support fusion device 30 includes a shell 31 and a push-up member 32 disposed in the shell 31. The shell 31 has a compression position and a support position where the push-up member 32 pushes against the shell 31. The push-up member 32 has an internally threaded connection hole, and the shell 31 has an opening to avoid the connection hole. The above structure is easy to operate. Specifically, by operating the push-up member 32 to push against the shell 31, the fixation of the anterior-posterior combined atlantoaxial fusion device can be achieved.

[0040] like Figures 3 to 6 As shown, in the technical solution of this embodiment, the housing 31 includes an upper gland 311 and a connecting ring 312, the connecting ring 312 is a barrel-shaped structure, the upper gland 311 is at least partially nested in the connecting ring 312, the first end of the connecting ring 312 has a first inner flange, and the lower end of the upper gland 311 has a first outer flange. When the abutting member 32 abuts against the inner wall of the upper gland 311, the first inner flange can cooperate with the first outer flange to prevent the upper gland 311 from falling out of the connecting ring 312. The above structure has low processing cost and compact structure. When in use, the upper gland 311 can be fixed by operating the connecting member 20. The cooperation of the first inner flange and the first outer flange is relatively convenient and easy to process, and the positioning of the first inner flange and the first outer flange makes it difficult for the upper gland 311 to fall out of the connecting ring 312. Specifically, the first outer flange of the upper gland 311 is matched with the inner diameter of the connecting ring 312, and the first inner flange is matched with the outer wall of the upper gland 311. Further specifically, the connecting ring 312 is a cylindrical structure.

[0041] like Figures 3 to 6 As shown, in the technical solution of this embodiment, the upper end of the upper cover 311 has a second outer flange, and the first inner flange can move between the first outer flange and the second outer flange. The above structure realizes the upper and lower position limitation between the connecting ring 312 and the upper cover 311. It should be noted that the above upper and lower are only to illustrate their position relationship, and can be left and right positions as the position changes.

[0042] like Figures 3 to 6 As shown, in the technical solution of this embodiment, the housing 31 also includes a lower pressure cover 313, which is at least partially nested in the connecting ring 312. The second end of the connecting ring 312 has a second inner flange, and the upper end of the lower pressure cover 313 has a third outer flange. When the abutting member 32 abuts against the inner wall of the lower pressure cover 313, the second inner flange can cooperate with the third outer flange to prevent the lower pressure cover 313 from falling out of the connecting ring 312. When the lower pressure cover 313 moves away from the connecting ring 312, the second inner flange of the connecting ring 312 can limit the third outer flange of the lower pressure cover 313, thereby ensuring that the lower pressure cover 313 will not fall out of the connecting ring 312. The above structure is compact and has low processing cost.

[0043] like Figures 3 to 6 As shown, in the technical solution of this embodiment, the lower end of the lower cover 313 has a fourth outer flange, and the second inner flange can move between the third outer flange and the fourth outer flange. The cooperation of the second inner flange and the fourth outer flange can realize the limiting of the lower cover 313 by the connecting ring 312 at another angle.

[0044] like Figures 3 to 6As shown, in the technical solution of this embodiment, the connecting member 20 is an ellipsoid, and the axis of the connecting hole coincides with the short axis of the ellipsoid. The structural processing cost of the ellipsoid is low and the operation is convenient. The movement of the ellipsoid is relatively convenient.

[0045] like Figures 3 to 6 As shown, in the technical solution of this embodiment, both ends of the ellipsoid have a first plane perpendicular to the long axis of the ellipsoid, and a second plane matching the first plane is provided on the inner wall of the shell 31. The above structure makes the contact area between the ellipsoid and the shell 31 larger and the matching is more stable. Specifically, the inner wall of the upper pressure cover 311 and the inner wall of the lower pressure cover 313 both have planes to match the planes at both ends of the ellipsoid.

[0046] like Figure 1 and Figure 8 As shown, in the technical solution of this embodiment, the occipital-cervical fusion plate 10 further includes a cervical bone plate 13, and the cervical bone plate 13 is connected to the two connecting plates 12. The provision of the cervical bone plate 13 makes it easy for the anterior-posterior combined atlantoaxial fusion device to fix the cervical bone.

[0047] like Figure 1 and Figure 8 As shown, in the technical solution of this embodiment, the cervical bone plate 13 is an H-shaped structure, and the upper ends of the H-shaped structure are respectively connected to the two connecting plates 12. The above structure is relatively strong and has a long service life. The connecting beam of the H-shaped structure can play a role of reinforcement.

[0048] like Figure 1 and Figure 8 As shown, in the technical solution of this embodiment, the two connecting plates 12 are arranged at an acute angle with the H-shaped structure. The above structure is well matched with the structure of the human body, so that the fixing and supporting effect of the anterior-posterior combined atlantoaxial fusion device is better.

[0049] like Figure 1 and Figure 8 As shown, in the technical solution of this embodiment, the occipital plate 11, the two connecting plates 12 and the cervical plate are an integrally formed structure. The above structure has a low processing cost and a strong structure.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anterior-posterior combined atlantoaxial fusion device, characterized in that: include: An occipital-cervical fusion plate (10), the occipital-cervical fusion plate (10) comprising an occipital bone plate (11) and two connecting plates (12), the occipital bone plate (11) being an arc-shaped structure, and the two connecting plates (12) being respectively connected to two ends of the occipital bone plate (11); A connecting piece (20), wherein a first end of the connecting piece (20) is connected to the occipital-cervical fusion plate (10); An atlantoaxial support fusion device (30), the atlantoaxial support fusion device (30) being connected to the second end of the connecting member (20), the atlantoaxial support fusion device (30) having a compressed position and an open support position; The atlantoaxial support fusion device (30) comprises a shell (31) and a resisting member (32) arranged in the shell (31); the shell (31) has a compressed position and a supporting position where the resisting member (32) resists against the shell (31) in an open state; the resisting member (32) has a connecting hole with an internal thread, and the shell (31) has an opening that avoids the connecting hole.

2. The anterior-posterior combined atlantoaxial fusion device according to claim 1, characterized in that: The two connecting plates (12) are both provided with connecting holes, the connecting member (20) is a bridging bolt, and the first end of the bridging bolt has a nut that matches the connecting hole.

3. The anterior-posterior atlantoaxial fusion device according to claim 2, characterized in that: The second end of the bridging bolt has an external thread, and the external thread is matched with the internal thread.

4. The anterior-posterior atlantoaxial fusion device according to claim 3, characterized in that: The shell (31) comprises an upper pressure cover (311) and a connecting ring (312); the connecting ring (312) is a barrel-shaped structure; the upper pressure cover (311) is at least partially nested in the connecting ring (312); the first end of the connecting ring (312) has a first inner flange; the lower end of the upper pressure cover (311) has a first outer flange; when the abutting member (32) abuts against the inner wall of the upper pressure cover (311), the first inner flange can cooperate with the first outer flange to prevent the upper pressure cover (311) from falling out of the connecting ring (312).

5. The anterior-posterior combined atlantoaxial fusion device according to claim 4, characterized in that: The upper end of the upper pressure cover (311) has a second outer flange, and the first inner flange can move between the first outer flange and the second outer flange.

6. The anterior-posterior atlantoaxial fusion device according to claim 4, characterized in that: The shell (31) further comprises a lower pressing cover (313), wherein the lower pressing cover (313) is at least partially nested in the connecting ring (312), the second end of the connecting ring (312) has a second inner flange, and the upper end of the lower pressing cover (313) has a third outer flange, and when the abutting member (32) abuts against the inner wall of the lower pressing cover (313), the second inner flange can cooperate with the third outer flange to prevent the lower pressing cover (313) from falling out of the connecting ring (312).

7. The anterior-posterior combined atlantoaxial fusion device according to claim 6, characterized in that: The lower end of the lower pressure cover (313) has a fourth outer flange, and the second inner flange can move between the third outer flange and the fourth outer flange.

8. The anterior-posterior atlantoaxial fusion device according to claim 3, characterized in that: The connecting piece (20) is an ellipsoid, and the axis of the connecting hole coincides with the short axis of the ellipsoid.

9. The anterior-posterior atlantoaxial fusion device according to claim 8, characterized in that: Both ends of the ellipsoid have a first plane perpendicular to the long axis of the ellipsoid, and a second plane matching the first plane is provided on the inner wall of the shell (31).

10. The anterior-posterior combined atlantoaxial fusion device according to any one of claims 1 to 9, characterized in that: The occipital-cervical fusion plate (10) further comprises a cervical bone plate (13), wherein the cervical bone plate (13) is connected to the two connecting plates (12).

11. The anterior-posterior atlantoaxial fusion device according to claim 10, characterized in that: The cervical bone plate (13) is an H-shaped structure, and the upper ends of the H-shaped structure are respectively connected to the two connecting plates (12) in a corresponding manner.

12. The anterior-posterior atlantoaxial fusion device according to claim 11, characterized in that: The two connecting plates (12) are arranged at an acute angle with the H-shaped structure.

13. The anterior-posterior atlantoaxial fusion device according to claim 10, characterized in that: The occipital plate (11), the two connecting plates (12) and the cervical plate (13) are an integrally formed structure.

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