Anterior cervical dynamic fixation plate

Abstract

The present application relates to a kind of anterior cervical dynamic fixation plate, including first bone plate and second bone plate, first bone plate and second bone plate can be limit expansion and limit rotation and nested connection between, first bone plate corresponds the end of second bone plate and is equipped with connecting plate, both sides of connecting plate are respectively equipped with lug, second bone plate inside is equipped with the cavity of accommodating connecting plate, both sides of cavity are respectively equipped with limit sliding slot, connecting plate can limit rotation and be set in cavity inside and the lug can limit sliding and be covered in limit sliding slot, first bone plate and second bone plate are opened on the each cervical vertebra segment of corresponding patient anterior cervical fixed and have fixed hole.The present application can be based on guaranteeing cervical vertebra fixed segment stability, realize that cervical vertebra fixed segment has a certain range of expansion and lateral bending activity, while it can also avoid excessive activity, it is favorable to reduce postoperative complication, and it is favorable to the reservation of cervical vertebra motor function.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of anterior cervical spine fixation, in particular to a dynamic anterior cervical spine fixation plate. BACKGROUND

[0002] Cervical spondylosis, intervertebral disc protrusion compressing the dural sac and spinal cord in the cervical spinal canal is one of the common pathogenic mechanisms of cervical spondylosis, in recent years, anterior cervical discectomy and fusion fixation (ACDF) has been popularized and applied in more and more hospitals, which has significant effect on cervical spondylosis caused by cervical spondylosis.

[0003] The principle of anterior cervical discectomy and fusion fixation (ACDF) is to remove the protruding and compressing intervertebral disc, yellow ligament or osteophyte through the anterior cervical spine, and implant a support structure between the adjacent cones of the diseased segment, and connect and fix the anterior edge of the vertebral body of the corresponding segment.

[0004] The existing anterior cervical vertebral body connecting and fixing device sacrifices the activity of the corresponding segment to achieve firm fixation effect, but it leads to the loss of part of the movement function of the cervical spine, and causes adjacent segment degeneration and other complications. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a dynamic anterior cervical spine fixation plate, which realizes a certain activity of the fixed cervical spine segment, retains the movement function of the cervical spine and reduces postoperative complications.

[0006] The technical solution adopted by the present application to solve the technical problem is to provide a dynamic anterior cervical spine fixation plate, which comprises a first bone plate and a second bone plate, the first bone plate and the second bone plate are nested and connected in a limited extension and limited rotation manner, one end of the first bone plate corresponding to the second bone plate is provided with a connecting plate, both sides of the connecting plate are respectively provided with a hanging ear, the inside of the second bone plate is provided with a cavity accommodating the connecting plate, both sides of the cavity are respectively provided with a limiting sliding groove, the connecting plate is rotatably arranged in the cavity, and the hanging ear is sleeved in the limiting sliding groove in a limited sliding manner, and the first bone plate and the second bone plate are provided with fixing holes corresponding to each cervical spine segment to be fixed on the anterior cervical spine of a patient.

[0007] The front end of the connecting plate is provided as a smooth arc structure, the inside of the second bone plate is provided as a smooth arc structure at the end position of the cavity and can match the arc structure of the front end of the connecting plate to facilitate the lateral rotation of the connecting plate.

[0008] The end face of the second bone plate corresponding to the first bone plate is an opening structure of the cavity.

[0009] The first bone plate, the connecting plate and the hanging ear are an integral structure.

[0010] Beneficial effects

[0011] In this invention, the anterior cervical dynamic fixation plate is composed of a first bone plate and a second bone plate spliced ​​together. The first and second bone plates have fixation holes corresponding to the cervical vertebrae to be fixed in the anterior cervical path of the patient, so that the cervical vertebrae can be connected and fixed using the first and second bone plates. In addition, the first and second bone plates form a nested connection structure that can limit extension and rotation, which ensures the stability of the cervical vertebrae to be fixed while allowing the cervical vertebrae to have a certain range of extension and lateral bending activities, while avoiding excessive movement. This helps to reduce postoperative complications and preserve cervical spine motor function. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention in its normal state.

[0013] Figure 2 This is a schematic diagram of the structure of the present invention in a stretched state.

[0014] Figure 3 This is a schematic diagram of the structure of the present invention in a lateral bending state.

[0015] Figure 4 This is a schematic diagram of the structure of the first bone plate of the present invention.

[0016] Figure 5 This is a schematic diagram of the structure of the second bone plate of the present invention.

[0017] Figure 6 This is a schematic cross-sectional view of the second bone plate of the present invention. Detailed Implementation

[0018] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0019] like Figure 1 The diagram shows an anterior cervical dynamic fixation plate for fixing two adjacent cervical vertebrae. It includes a first bone plate 1 and a second bone plate 2, which are nested together with limited extension, contraction, and rotation. The extended states of the first bone plate 1 and the second bone plate 2 are as follows: Figure 2 As shown, the bending state is as follows Figure 3 As shown.

[0020] like Figure 4As shown, the first bone plate 1 corresponds to one end of the second bone plate 2, and is provided with a connecting plate 3, the front end of the connecting plate 3 is provided with a smooth arc structure, and the two sides of the connecting plate 3 are respectively provided with a hanging ear 4. The first bone plate 1, the connecting plate 3 and the hanging ear 4 are integrally formed.

[0021] As shown in Figure 5 and Figure 6 As shown, the second bone plate 2 is internally provided with a cavity 5 for accommodating the connecting plate 3, the cavity 5 is provided with an opening structure at the end face of the second bone plate 2 corresponding to the first bone plate 1, and the two sides of the cavity 5 are respectively provided with a limiting sliding groove 6. The end position of the cavity 5 in the second bone plate 2 is provided with a smooth arc structure.

[0022] The connecting plate 3 is limitingly rotatably arranged in the cavity 5, the front end arc structure of the connecting plate 3 matches the internal arc structure of the second bone plate 2, facilitating the lateral rotation of the connecting plate 3. The hanging ear 4 is sleeved in the limiting sliding groove 6 and can limit sliding along the sliding groove 6. The first bone plate 1 and the second bone plate 2 are connected through the limiting sliding of the hanging ear 4 along the sliding groove 6 to realize the telescopic movement, and the connecting plate 4 is limitingly rotated to realize the bending movement

[0023] The two sides of the first bone plate 1 and the second bone plate 2 correspond to the two segments of the cervical spine to be fixed in the anterior cervical approach, and are respectively provided with a fixing hole 7, and the first bone plate 1 and the second bone plate 2 are fixed to the anterior edge of the cone of the corresponding segment of the patient through the fixing hole 7.

[0024] The anterior cervical dynamic fixation plate, the first bone plate 1 and the second bone plate 2 form a limitingly telescopic and limitingly lateral bending nested connection structure, which realizes the telescopic movement and lateral bending movement of the cervical spine fixed segment within a certain range on the basis of ensuring the stability of the cervical spine fixed segment, and can also avoid excessive activity, which is beneficial to reduce postoperative complications and beneficial to the preservation of cervical spine movement function.

[0025] Of course, the anterior cervical dynamic fixation plate claimed in the present application is not limited to the connection and fixation between the adjacent two segments of the cervical spine, but can also be used for the connection and fixation of multiple segments of the cervical spine.

Claims

1. An anterior cervical dynamic fixation plate, characterized by: The utility model relates to a kind of cervical vertebra fixation device, including first bone plate (1) and second bone plate (2), the first bone plate (1) is nested with second bone plate (2) between limit expansion and limit rotation and is connected, the first bone plate (1) is equipped with connecting plate (3) to one end of second bone plate (2), both sides of the connecting plate (3) are equipped with ear (4) respectively, the second bone plate (2) is equipped with the cavity (5) of accommodating connecting plate (3) inside, both sides of the cavity (5) are equipped with limit sliding slot (6) respectively, the connecting plate (3) can be limit rotation and be arranged in the cavity (5) inside, and the ear (4) can be limit sliding and be sleeved in limit sliding slot (6), the first bone plate (1) and second bone plate (2) are opened with fixed hole (7) on the corresponding each cervical vertebra segment of patient's neck anterior path to be fixed; The front end of the connecting plate (3) is provided as a smooth arc structure, the end of the cavity (5) inside the second bone plate (2) is provided as a smooth arc structure and can match the front end arc structure of the connecting plate (3) to facilitate the lateral rotation of the connecting plate (3). The end surface of the second bone plate (2) corresponding to the first bone plate (1) is an opening structure of the cavity (5).

2. The anterior cervical dynamic fixation plate of claim 1, wherein: The first bone plate (1), the connecting plate (3) and the ear (4) are integrally formed.

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