CN219042821U - Artificial vertebral body connecting system - Google Patents

Abstract

The utility model discloses an artificial vertebral body connection system, which comprises an artificial vertebral body, a connector and a nail-rod assembly, the artificial vertebral body is provided with a handle, and the nail-rod assembly includes a longitudinal connecting rod and a plurality of pedicles screw, the connector includes a first C-shaped hook, a second C-shaped hook, a first connecting rod, a second connecting rod, a first locking screw, a second locking screw and a third locking screw, the first A connecting rod is provided with a connecting portion, and an insertion hole is provided on the connecting portion, and the first locking screw and the first C-shaped hook form a first connection that is mated with the handle or the longitudinal connecting rod. hole, the second locking screw and the second C-shaped hook form a second connection hole that is mated with the handle or the longitudinal connecting rod, and the third locking screw can compress the second Connecting rod: With the utility model, the artificial cone, the connector and the nail-rod assembly cooperate to form a complete connection system to ensure the safety and stability of the patient's spine after surgery.

Description

An artificial vertebral body connection system

technical field

The utility model belongs to the field of orthopedic implant technology, in particular to an artificial vertebral body connection system.

Background technique

The spine is an indispensable part of supporting the human body. The spine is composed of multiple vertebral joints in series. If two adjacent vertebral joints are broken or misplaced, it will cause difficulty in walking. At present, when the human spine is deformed due to fractures, tumors, etc. Later, it may lead to spinal cord nerve damage and have to perform vertebral body resection. After vertebral body resection, the spine needs to rebuild its stability. The emergence of artificial vertebral bodies provides an ideal method for the treatment of such diseases. A common method is to install spinal internal fixators up and down the diseased spine through surgery to stabilize the spine. In the posterior column, pedicle screws are implanted in the upper and lower normal vertebral body of the resected vertebral body. The rod body plays a supporting role, and the anterior column needs to be placed with an artificial vertebral body, thereby realizing the stability of the spine.

As shown in Figure 1, the Chinese patent text (publication number: CN103239282A) discloses a vertebral body combined internal fixation system for internally fixing the spine, which includes an artificial vertebral body main body, vertebral body fixing screws, and vertebral body connectors , pedicle screws, and longitudinal connecting rods. The main body of the artificial vertebral body forms a tight fixation with the upper and lower adjacent vertebral bodies through the vertebral body fixing screws. The pedicle screws and the longitudinal connecting rods form the posterior fixation and support of the spine. The vertebral body connectors The main body of the artificial vertebral body is tightly connected and fixed with the longitudinal connecting rod to form a vertebral body joint internal fixation system, which is used to replace the resected or missing host vertebral body segment to restore and reconstruct the physiological height of the spine and will form a Bone fusion between upper and lower adjacent vertebrae.

The device realizes the fixation between the screw rod system and the artificial vertebral body by screwing the vertebral body fixing screws into the vertebral body fixing screw holes on the artificial vertebral body. During the operation, the vertebral body fixing screws are first driven into the artificial vertebral body, and then When the longitudinal connecting rod is inserted into the tail of the screw, it is necessary to repeatedly adjust the depth of the vertebral body fixation screw into the artificial vertebral body to adapt to the distance between the artificial vertebral body and the longitudinal connecting rod, and the upper and lower positions of the screw cannot be moved, resulting in difficult operation during the operation. Poor practicality.

Utility model content

The technical problem to be solved by the utility model is to provide an artificial vertebral body connection system, which can effectively solve the problem in the prior art that the cooperation between the artificial vertebral body and the screw-rod system cannot be guaranteed.

In order to solve the problems of the technologies described above, the technical scheme adopted by the utility model is as follows:

An artificial vertebral body connection system, which includes an artificial vertebral body, a connector and a nail-rod assembly, the artificial vertebral body is a columnar body, one or both sides of the artificial vertebral body are provided with a handle, and the handle is connected to the A rectangular hole is formed between the artificial vertebral bodies, and the artificial vertebral bodies are used to be implanted between the upper healthy vertebral body and the lower healthy vertebral body. A plurality of pedicle screws are positionally adjustable and connected to the longitudinal connecting rod, and the connector includes a first C-shaped hook, a second C-shaped hook, a first connecting rod, a second Two connecting rods, the first locking screw, the second locking screw and the third locking screw, one end of the first connecting rod is fixedly connected with the first C-shaped hook, and the other end of the first connecting rod A connecting portion is provided, the connecting portion is provided with a socket, the axis of the socket is parallel to the axis of the first connecting rod, and one end of the second connecting rod is fixedly connected with the second C-shaped hook , the other end of the second connecting rod is movably inserted into the socket, the end of the first C-shaped hook away from the hook tip is provided with a first threaded hole, and the first locking screw is connected to the first The threaded hole is threaded, the first locking screw can be screwed into the hook tip side of the first C-shaped hook and forms a cooperative connection with the first C-shaped hook and the handle or the longitudinal connecting rod The first connection hole of the second C-shaped hook is provided with a second threaded hole at the end away from the hook tip, and the second locking screw is threadedly connected with the second threaded hole, and the second locking screw can be Screw into the hook tip side of the second C-shaped hook and form a second connecting hole with the second C-shaped hook to cooperate with the handle or the longitudinal connecting rod, and the connecting part is also provided with There is a third threaded hole communicating with the socket, the third locking screw is threadedly connected with the third threaded hole, the third locking screw can be screwed into one side of the socket and Compress the second link.

As a preferred solution of the present invention, a limiting block is provided at the other end of the second connecting rod, and the diameter of the limiting block is larger than the diameter of the insertion hole.

As a preferred solution of the present invention, the first locking screw, the second locking screw and the third locking screw are all inclined towards the side of the longitudinal connecting rod, and are connected to the first connecting rod. The expansion and contraction directions of the rod and the second connecting rod form an included angle of 45 degrees.

As a preferred solution of the present invention, the insertion hole is a circular hole, and the second connecting rod is a cylinder.

As a preferred solution of the present invention, the interior of the artificial vertebral body is configured as a porous structure, and the outer surface of the artificial vertebral body is smooth.

As a preferred solution of the present invention, the upper end surface of the artificial vertebral body cooperates with the lower end surface of the upper healthy vertebral body, and the lower end surface of the artificial vertebral body cooperates with the upper end surface of the lower healthy vertebral body.

Compared with the prior art, the artificial vertebral body connection system provided by the utility model has the following beneficial effects:

When the patient's diseased vertebral body is resected and artificial vertebral body needs to be used for reconstruction, the artificial cone is implanted between the upper healthy cone and the lower healthy cone, by adjusting the first C-shaped hook and the second C-shaped hook on the handle Or the position of the longitudinal connecting rod, which can better adapt to the distance between the artificial vertebral body and the longitudinal adjusting rod, has strong adaptability and high practicability; the artificial cone, connector and nail-rod assembly cooperate to form a complete connection system, The body replaces the resected or missing host cone segment to restore or reconstruct the physiological height of the spine and form the fusion between the upper and lower adjacent cones. The connector and screw-rod assembly can form a spinal screw-rod system on the spine for fixation And the role of supporting the spine to ensure the safety and stability of the patient's spine after surgery.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings of the embodiments will be briefly introduced below.

Fig. 1 is the structural representation of traditional artificial vertebral connection system;

Fig. 2 is a schematic structural view of an artificial vertebral body connection system provided by an embodiment of the present invention;

Fig. 3 is a structural schematic diagram of the connector;

Fig. 4 is a schematic diagram of the structure of the artificial vertebral body.

Marked in the figure:

artificial vertebral body 1; connector 2; nail rod assembly 3; handle 4; longitudinal connecting rod 5; pedicle screw 6; first C-shaped hook 7; second C-shaped hook 8; first connecting rod 9; second The connecting rod 10 ; the first locking screw 11 ; the second locking screw 12 ; the third locking screw 13 ; the connecting portion 14 ; the socket 15 ; the first connecting hole 16 ; the second connecting hole 17 ;

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

In describing the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom" etc. indicate directions or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation , so it cannot be interpreted as a limitation of the present utility model. It should be understood that the terms "first" and "second" are used in the present invention to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish information of the same type from each other. For example, "first" information may also be referred to as "second" information without departing from the scope of the present invention, and similarly, "second" information may also be referred to as "first" information.

As shown in Figures 2 to 4, the preferred embodiment of the present utility model provides a connection system for an artificial vertebral body 1, which includes an artificial vertebral body 1, a connector 2 and a nail-rod assembly 3, and the artificial vertebral body 1 is columnar One or both sides of the artificial vertebral body 1 are provided with a handle 4, a rectangular hole is formed between the handle 4 and the artificial vertebral body 1, and the artificial vertebral body 1 is used for implanting the upper healthy Between the vertebral body and the lower healthy vertebral body, the screw-rod assembly 3 includes a longitudinal connecting rod 5 and a plurality of pedicle screws 6 connected with the healthy vertebral body, and a plurality of the pedicle screws 6 can be connected in a position-adjustable manner On the longitudinal connecting rod 5, the connector 2 includes a first C-shaped hook 7, a second C-shaped hook 8, a first connecting rod 9, a second connecting rod 10, a first locking screw 11, a second Locking screw 12 and the third locking screw 13, one end of the first connecting rod 9 is fixedly connected with the first C-shaped hook 7, and the other end of the first connecting rod 9 is provided with a connecting portion 14, so The connecting portion 14 is provided with an insertion hole 15, the axis of the insertion hole 15 is parallel to the axis of the first connecting rod 9, and one end of the second connecting rod 10 is fixedly connected with the second C-shaped hook 8 , the other end of the second connecting rod 10 is movably inserted into the socket 15, the end of the first C-shaped hook 7 away from the hook tip is provided with a first threaded hole, and the first locking screw 11 and The first threaded hole is screwed, and the first locking screw 11 can be screwed into the hook tip side of the first C-shaped hook 7 and forms a connection with the handle 4 with the first C-shaped hook 7 Or the first connecting hole 16 of the longitudinal connecting rod 5 is matched and connected, and the end of the second C-shaped hook 8 away from the hook tip is provided with a second threaded hole, and the second locking screw 12 and the second screw thread The second locking screw 12 can be screwed into one side of the hook point of the second C-shaped hook 8 and forms a connection with the handle 4 or the longitudinal direction with the second C-shaped hook 8 The rod 5 is matched with the second connecting hole 17, and the connecting part 14 is also provided with a third threaded hole communicating with the insertion hole 15, and the third locking screw 13 is threaded with the third threaded hole. connected, the third locking screw 13 can be screwed into one side of the insertion hole 15 and compress the second connecting rod 10 .

When the patient's vertebral body needs to be artificially implanted, the artificial cone is implanted between the upper healthy cone and the lower healthy cone, and the longitudinal connecting rod is fixed on the healthy vertebral body through screws to form a screw-rod system for fixation and The role of supporting the spine, according to the distance between the artificial vertebral body 1 and the longitudinal connecting rod 5, adjust the distance between the first C-shaped hook 7 and the second C-shaped hook 8 through the third locking screw 13, and the first C-shaped hook 7 Buckle on the handle 4, screw in the first locking screw 11 so that the first C-shaped hook 7 is connected to the handle 4, buckle the second C-shaped hook 8 on the longitudinal connecting rod 5, screw in the second locking screw 12 so that The second C-shaped hook 8 is connected to the longitudinal connecting rod 5. By adjusting the position of the first C-shaped hook 7 on the handle 4 and the position of the second C-shaped hook 8 on the longitudinal connecting rod 5, the connector 2 can be adjusted along the spine. The position in the length direction, and finally tighten the third locking screw 13 to realize the position fixation between the artificial vertebral body 1 and the connector 2, which can better adapt to the distance between the artificial vertebral body 1 and the longitudinal connecting rod 5, and can be used during the operation. There is no need for repeated adjustments during the process, which reduces the difficulty of the operation, makes the artificial vertebral body 1, the connector 2 and the nail-rod assembly 3 better cooperate, has strong adaptability and high practicability; with the utility model, the artificial cone , the connector 2 and the screw-rod assembly 3 cooperate to form a complete connection system, and the artificial vertebral body 1 replaces the resected or missing host cone segment to restore or reconstruct the physiological height of the spine and form the fusion between the upper and lower adjacent cones , the connector 2 and the screw-rod assembly 3 can form a spinal screw-rod system on the spine to fix and support the spine, ensuring the safety and stability of the patient's spine after surgery.

Exemplarily, the other end of the second connecting rod 10 is provided with a limiting block 18 , and the diameter of the limiting block 18 is larger than the diameter of the insertion hole 15 . The limit block 18 can prevent the second connecting rod 10 from slipping out of the insertion hole 15 and ensure the connection between the first connecting rod 9 and the second connecting rod 10 .

Exemplarily, the first locking screw 11, the second locking screw 12 and the third locking screw 13 are all inclined towards the side of the longitudinal connecting rod 5, and are connected to the first connecting rod 5. The expansion and contraction directions of the rod 9 and the second connecting rod 10 form an included angle of 45 degrees. Such setting ensures that the angles of the first locking screw 11 , the second locking screw 12 and the third locking screw 13 are consistent, which is convenient for operation.

Exemplarily, the insertion hole 15 is a circular hole, and the second connecting rod 10 is a cylinder. Thus, the first C-shaped hook 7 and the second C-shaped hook 8 can rotate different angles, and the cooperation with the handle 4 or the longitudinal connecting rod 5 is more in place, ensuring that the first C-shaped hook 7, the second C-shaped hook 8, Fixation between the handle 4 and the longitudinal connecting rod 5 .

Exemplarily, the interior of the artificial vertebral body 1 is configured as a porous structure, and the outer surface of the artificial vertebral body 1 is smooth. The pore structure is more conducive to the crawling and growing of bone cells, and accelerates the fusion between the artificial vertebral body 1 and the upper healthy vertebral body and the lower healthy vertebral body, making the artificial vertebral body 1 and the upper healthy vertebral body and the lower healthy vertebral body stable. and balance.

Exemplarily, in order to form a better connection between the artificial vertebral body 1, the upper healthy vertebral body and the lower healthy vertebral body, the upper end surface of the artificial vertebral body 1 cooperates with the lower end surface of the upper healthy vertebral body, so The lower end surface of the artificial vertebral body 1 cooperates with the upper end surface of the lower healthy vertebral body.

In specific implementation, the upper end surface of the artificial vertebral body 1 and the lower end surface of the artificial vertebral body 1 are both 3D printed grids, and the artificial vertebral body 1 can be used to replace the lower cervical spine, thoracic spine, and lumbar spine. any vertebrae.

In the description of the present utility model, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

The above is only the preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and replacements can also be made. And replacement should also be regarded as the protection scope of the present utility model.

Claims (6)

1. An artificial vertebral body connection system, characterized in that it comprises an artificial vertebral body, a connector and a nail-rod assembly, the artificial vertebral body is a columnar body, and one or both sides of the artificial vertebral body are provided with a handle, A rectangular hole is formed between the handle and the artificial vertebral body, the artificial vertebral body is used to be implanted between the upper healthy vertebral body and the lower healthy vertebral body, and the nail-rod assembly includes a longitudinal connecting rod and a plurality of A pedicle screw connected to a healthy vertebral body, a plurality of the pedicle screws are positionally adjustable and connected to the longitudinal connecting rod, and the connector includes a first C-shaped hook, a second C-shaped hook, a second C-shaped hook, and a second C-shaped hook. A connecting rod, a second connecting rod, a first locking screw, a second locking screw and a third locking screw, one end of the first connecting rod is fixedly connected with the first C-shaped hook, and the first The other end of the connecting rod is provided with a connecting portion, the connecting portion is provided with a socket, the axis of the socket is parallel to the axis of the first connecting rod, and one end of the second connecting rod is connected to the second connecting rod. The C-shaped hook is fixedly connected, the other end of the second connecting rod is movably inserted into the socket, the end of the first C-shaped hook away from the hook tip is provided with a first threaded hole, and the first locking screw Threadedly connected with the first threaded hole, the first locking screw can be screwed into the hook tip side of the first C-shaped hook and forms a connection with the handle or the first C-shaped hook with the first C-shaped hook. The first connecting hole for the mating connection of the longitudinal connecting rod, the end of the second C-shaped hook away from the hook tip is provided with a second threaded hole, the second locking screw is threadedly connected with the second threaded hole, and the first Two locking screws can be screwed into one side of the hook tip of the second C-shaped hook and form a second connecting hole with the second C-shaped hook to cooperate with the handle or the longitudinal connecting rod, the The connecting part is also provided with a third threaded hole communicating with the socket, the third locking screw is threadedly connected with the third threaded hole, and the third locking screw can be connected to the socket. One side is screwed in and compresses the second connecting rod. 2 . The artificial vertebral body connection system according to claim 1 , wherein a limiting block is provided at the other end of the second connecting rod, and the diameter of the limiting block is larger than the diameter of the insertion hole. 3 . 3. The artificial vertebral body connection system according to claim 1, wherein the first locking screw, the second locking screw and the third locking screw all face the longitudinal connection One side of the rod is arranged obliquely, and forms an included angle of 45 degrees with the stretching direction of the first connecting rod and the second connecting rod. 4. The artificial vertebral body connection system according to claim 1, wherein the insertion hole is a circular hole, and the second connecting rod is a cylinder. 5. The artificial vertebral body connection system according to claim 1, wherein the interior of the artificial vertebral body is configured as a porous structure, and the outer surface of the artificial vertebral body is smooth. 6. a kind of artificial vertebral body connection system according to claim 1, is characterized in that, the upper end face of described artificial vertebral body cooperates with the lower end face of described upper healthy vertebral body, and the lower end face of described artificial vertebral body matches with the lower end face of described upper healthy vertebral body. The upper end surface of the lower healthy vertebral body cooperates.

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