CN219042821U

CN219042821U - Artificial vertebral body connecting system

Info

Publication number: CN219042821U
Application number: CN202223527551.2U
Authority: CN
Inventors: 朱小军; 王晋; 林家明; 宋国徽; 唐清连; 卢金昌
Original assignee: Sun Yat Sen University Cancer Center
Current assignee: Sun Yat Sen University Cancer Center
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-05-19
Anticipated expiration: 2032-12-27

Abstract

The utility model discloses an artificial vertebral body connecting system which comprises an artificial vertebral body, a connector and a rod assembly, wherein the artificial vertebral body is provided with a handle, the rod assembly comprises a longitudinal connecting rod and a plurality of pedicle screws, the connector comprises 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 connecting rod is provided with a connecting part, the connecting part is provided with an inserting hole, the first locking screw and the first C-shaped hook form a first connecting hole which is in matched connection with the handle or the longitudinal connecting rod, the second locking screw and the second C-shaped hook form a second connecting hole which is in matched connection with the handle or the longitudinal connecting rod, and the third locking screw can compress the second connecting rod; by adopting the utility model, the artificial cone, the connector and the nail rod assembly are matched to form a complete connecting system, so that the safety and stability of the spine of a patient after operation are ensured.

Description

Artificial vertebral body connecting system

Technical Field

The utility model belongs to the technical field of orthopedic implantation, and particularly relates to an artificial vertebral body connecting system.

Background

The spine is an indispensable part for supporting a human body, the spine is composed of a plurality of sections of spine joints connected in series, if two adjacent spine joints are broken or misplaced, the human body is difficult to walk, at present, spinal nerve damage can be caused after the human body is deformed due to fracture, tumor and the like, vertebrotomy is performed, the stability of the spine after vertebrotomy needs to be rebuilt, and the appearance of an artificial vertebral body provides an ideal method for treating the diseases. The usual method is to stabilize the spine by mounting an internal spine fixator above and below the affected spinal region by surgery. The pedicle screws are implanted into the upper normal vertebral body and the lower normal vertebral body of the excised vertebral body of the rear column, the rod body plays a supporting role, and the artificial vertebral body needs to be placed on the front column, so that the stability of the vertebral column is realized.

As shown in fig. 1, chinese patent document (publication No. CN103239282 a) discloses a vertebral body combined internal fixation system for internal fixation of the spine, which includes an artificial vertebral body main body, vertebral body fixing screws, vertebral body connectors, pedicle screws, and longitudinal connecting rods, the artificial vertebral body main body is tightly fixed with upper and lower adjacent vertebral bodies through the vertebral body fixing screws, the pedicle screws and the longitudinal connecting rods form a spine posterior fixation and support, the vertebral body connectors tightly connect and fix the artificial vertebral body and the longitudinal connecting rods to form a vertebral body combined internal fixation system for implanting a host vertebral body segment to restore and reconstruct the physiological height of the spine instead of being resected or missing and to form a bone fusion with the upper and lower adjacent vertebral bodies in the future.

The device realizes the fixation between nail stick system and the artificial centrum through the centrum fixed screw hole on the artificial centrum with centrum set screw in, drives into the artificial centrum with centrum set screw earlier in the operation, places the longitudinal connecting rod into the tail of a nail again, needs to adjust the distance that centrum set screw stretches into between artificial centrum and the longitudinal connecting rod repeatedly to the upper and lower position of screw can not remove, leads to operation difficulty in the art, and the practicality is poor.

Disclosure of Invention

The utility model aims to solve the technical problem of providing an artificial vertebral body connecting system, which can practically solve the problem that the cooperation between an artificial vertebral body and a nail rod system cannot be ensured in the prior art.

In order to solve the technical problems, the utility model adopts the following technical scheme:

an artificial vertebral body connecting system comprises an artificial vertebral body, a connector and a rod assembly, wherein the artificial vertebral body is a columnar body, a handle is arranged on one side or two sides of the artificial vertebral body, a rectangular hole is formed between the handle and the artificial vertebral body in a surrounding mode, the artificial vertebral body is used for being implanted between an upper healthy vertebral body and a lower healthy vertebral body, the rod assembly comprises a longitudinal connecting rod and a plurality of pedicle screws connected with the healthy vertebral body, the pedicle screws are connected onto the longitudinal connecting rod in a position-adjustable mode, the connector comprises 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, one end of the first connecting rod is fixedly connected with the first C-shaped hook, a connecting part is arranged at the other end of the first connecting rod, a jack is arranged on the connecting part, the axis of the jack is parallel to the axis of the first connecting rod, 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 jack, one end of the first C-shaped hook far away from the hook tip is provided with a first threaded hole, a first locking screw is in threaded connection with the first threaded hole, the first locking screw can screw into the hook tip side of the first C-shaped hook and forms a first connecting hole matched and connected with the handle or the longitudinal connecting rod with the first C-shaped hook, one end of the second C-shaped hook far away from the hook tip is provided with a second threaded hole, the second locking screw is in threaded connection with the second threaded hole, the second locking screw can screw into the hook tip side of the second C-shaped hook and forms a second connecting hole matched and connected with the handle or the longitudinal connecting rod with the second C-shaped hook, the connecting part is also provided with a third threaded hole communicated with the jack, the third locking screw is in threaded connection with the third threaded hole, and the third locking screw can screw into one side of the jack and tightly press the second connecting rod.

As a preferable scheme of the utility model, the other end of the second connecting rod is provided with a limiting block, and the diameter of the limiting block is larger than that of the jack.

As a preferable scheme of the utility model, the first locking screw, the second locking screw and the third locking screw are all obliquely arranged towards one side of the longitudinal connecting rod and form an included angle of 45 degrees with the expansion and contraction directions of the first connecting rod and the second connecting rod.

As a preferable scheme of the utility model, the insertion hole is a circular hole, and the second connecting rod is a cylinder.

As a preferable scheme of the utility model, the inner part of the artificial vertebral body is provided with a pore structure, and the outer surface of the artificial vertebral body is smooth.

As a preferable scheme of the utility model, the upper end face of the artificial vertebral body is matched with the lower end face of the upper healthy vertebral body, and the lower end face of the artificial vertebral body is matched with the upper end face of the lower healthy vertebral body.

Compared with the prior art, the artificial vertebral body connecting system has the beneficial effects that:

when the pathological change vertebral body of the patient is resected and needs to be reconstructed by using the artificial vertebral body, the artificial cone is implanted between the upper healthy cone and the lower healthy cone, and the distance between the artificial vertebral body and the longitudinal adjusting rod can be better adapted by adjusting the positions of the first C-shaped hook and the second C-shaped hook on the handle or the longitudinal connecting rod, so that the adaptability is strong and the practicability is high; the artificial cone, the connector and the nail rod assembly are matched to form a complete connecting system, the artificial cone replaces the excised or missing host cone segment to restore or reconstruct the physiological height of the spine and form the fusion between the upper adjacent cone and the lower adjacent cone, the connector and the nail rod assembly can form a spine nail rod system on the spine to play the roles of fixing and supporting the spine, and the safety and stability of the spine of a postoperative patient are ensured.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings of the embodiments will be briefly described below.

FIG. 1 is a schematic illustration of a conventional artificial vertebral body connection system;

FIG. 2 is a schematic view of an artificial vertebral body connection system according to an embodiment of the present utility model;

FIG. 3 is a schematic structural view of the connector;

fig. 4 is a schematic structural view of an artificial vertebral body.

The marks in the figure:

an artificial vertebral body 1; a connector 2; a pin assembly 3; a handle 4; a longitudinal connecting rod 5; pedicle screws 6; a first C-shaped hook 7; a second C-shaped hook 8; a first link 9; a second link 10; a first locking screw 11; a second locking screw 12; a third locking screw 13; a connection portion 14; a jack 15; a first connection hole 16; a second connection hole 17; and a stopper 18.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the utility model.

As shown in fig. 2 to 4, the preferred embodiment of the present utility model provides a connection system of an artificial vertebral body 1, which comprises an artificial vertebral body 1, a connector 2 and a rod assembly 3, wherein the artificial vertebral body 1 is a cylindrical body, one or both sides of the artificial vertebral body 1 are provided with handles 4, a rectangular hole is enclosed between the handles 4 and the artificial vertebral body 1, the artificial vertebral body 1 is used for being implanted between an upper healthy vertebral body and a lower healthy vertebral body, the rod assembly 3 comprises a longitudinal connection rod 5 and a plurality of pedicle screws 6 connected with the healthy vertebral body, the pedicle screws 6 are connected on the longitudinal connection rod 5 in a position-adjustable manner, the connector 2 comprises 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 a third locking screw 13, one end of the first connecting rod 9 is fixedly connected with the first C-shaped hook 7, the other end of the first connecting rod 9 is provided with a connecting part 14, the connecting part 14 is provided with an inserting hole 15, the axis of the inserting hole 15 is parallel to the axis of the first connecting rod 9, 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 inserting hole 15, one end of the first C-shaped hook 7 far away from the hook tip is provided with a first threaded hole, the first locking screw 11 is in threaded connection with the first threaded hole, the first locking screw 11 can be screwed into one side of the hook tip of the first C-shaped hook 7 and forms a first connecting hole 16 which is matched and connected with the handle 4 or the longitudinal connecting rod 5 together with the first C-shaped hook 7, one end of the second C-shaped hook 8 far away from the hook tip is provided with a second threaded hole, the second locking screw 12 is in threaded connection with the second threaded hole, the second locking screw 12 can be screwed into one side of the hook tip of the second C-shaped hook 8 and forms a second connecting hole 17 matched and connected with the handle 4 or the longitudinal connecting rod 5 with the second C-shaped hook 8, a third threaded hole communicated with the jack 15 is further formed in the connecting portion 14, the third locking screw 13 is in threaded connection with the third threaded hole, and the third locking screw 13 can be screwed into one side of the jack 15 and compress the second connecting rod 10.

When the vertebral body of a patient needs to be manually implanted, the artificial cone is implanted between the upper healthy cone and the lower healthy cone, the longitudinal connecting rod is fixed on the healthy cone through the screw, a rod nailing system is formed to play a role of fixing and supporting the spine, according to the distance between the artificial vertebral body 1 and the longitudinal connecting rod 5, the distance between the first C-shaped hook 7 and the second C-shaped hook 8 is adjusted through the third locking screw 13, the first C-shaped hook 7 is buckled on the handle 4, the first locking screw 11 is screwed in to enable the first C-shaped hook 7 to be connected with the handle 4, the second C-shaped hook 8 is buckled on the longitudinal connecting rod 5, the second locking screw 12 is screwed in to enable the second C-shaped hook 8 to be connected with the longitudinal connecting rod 5, the position of the connector 2 along the length direction of the spine can be adjusted, finally the third locking screw 13 is locked to enable the position between the artificial vertebral body 1 and the connector 2 to be fixed, the artificial vertebral body 1 and the longitudinal connecting rod 5 can be better adapted to the distance between the artificial vertebral body 1 and the vertebral body 2 is better, the practical surgical rod is not required to be adjusted, and the surgical rod assembly is better matched with the surgical rod is not required to be adjusted in the process, and the surgical rod is better 3 is required to be adjusted; according to the utility model, the artificial cone, the connector 2 and the nail rod assembly 3 are matched to form a complete connecting system, the artificial cone 1 replaces the excised or missing host cone segment to restore or reconstruct the physiological height of the spine and form the fusion between the upper adjacent cone and the lower adjacent cone, and the connector 2 and the nail rod assembly 3 can form a spine nail rod system on the spine to play a role in fixing and supporting the spine and ensure the safety and stability of the spine of a patient after operation.

Illustratively, a stopper 18 is disposed at the other end of the second link 10, and the diameter of the stopper 18 is larger than the diameter of the insertion hole 15. The limiting block 18 can prevent the second connecting rod 10 from sliding out of the insertion hole 15, and the connection between the first connecting rod 9 and the second connecting rod 10 is ensured.

Illustratively, the first locking screw 11, the second locking screw 12 and the third locking screw 13 are all inclined towards one side of the longitudinal connecting rod 5, and form an included angle of 45 degrees with the telescopic direction of the first connecting rod 9 and the second connecting rod 10. By means of the arrangement, the first locking screw 11, the second locking screw 12 and the third locking screw 13 are guaranteed to be identical in angle, and operation is facilitated.

Illustratively, the receptacle 15 is a circular hole and the second link 10 is a cylinder. Thereby, the first C-shaped hook 7 and the second C-shaped hook 8 can rotate at different angles, and the cooperation with the handle 4 or the longitudinal connecting rod 5 is further added in place, so that the fixation among the first C-shaped hook 7, the second C-shaped hook 8, the handle 4 and the longitudinal connecting rod 5 is ensured.

Illustratively, the interior of the artificial vertebral body 1 is provided with a pore structure, and the outer surface of the artificial vertebral body 1 is smooth. The pore structure is more favorable for bone cell to creep into, quickens the fusion between the artificial vertebral body 1 and the upper healthy vertebral body and the lower healthy vertebral body, and ensures that the artificial vertebral body 1 and the upper healthy vertebral body and the lower healthy vertebral body are stable and balanced.

Illustratively, in order to provide a better engagement 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 is engaged with the lower end surface of the upper healthy vertebral body, and the lower end surface of the artificial vertebral body 1 is engaged with the upper end surface of the lower healthy vertebral body.

In the specific implementation, the upper end surface of the artificial vertebral body 1 and the lower end surface of the artificial vertebral body 1 are 3D printing grids, and the artificial vertebral body 1 can be used for replacing any vertebra of the lower cervical vertebra, the thoracic vertebra and the lumbar vertebra.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims

1. The artificial vertebral body connecting system is characterized by comprising an artificial vertebral body, a connector and a rod assembly, wherein the artificial vertebral body is a columnar body, a handle is arranged on one side or two sides of the artificial vertebral body, a rectangular hole is formed between the handle and the artificial vertebral body in a surrounding mode, the artificial vertebral body is used for being implanted between an upper healthy vertebral body and a lower healthy vertebral body, the rod assembly comprises a longitudinal connecting rod and a plurality of pedicle screws connected with the healthy vertebral body, the pedicle screws are connected on the longitudinal connecting rod in a position-adjustable mode, the connector comprises 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, one end of the first connecting rod is fixedly connected with the first C-shaped hook, the other end of the first connecting rod is provided with a connecting part, the axis of the jack is parallel to the axis of the first connecting rod, 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 in a position-adjustable mode, the second C-shaped hook is in a threaded mode, the second hook is in a threaded mode, the threaded mode is far away from the first hook is in a threaded mode, the threaded hole is in a threaded mode, the threaded mode is in a mode, and is in a threaded mode is in a mode, and is in the threaded with the threaded mode is far from the first hook is in a threaded mode, the second locking screw can screw into one side of the hook tip of the second C-shaped hook and form a second connecting hole matched and connected with the handle or the longitudinal connecting rod with the second C-shaped hook, a third threaded hole communicated with the jack is further formed in the connecting portion, the third locking screw is in threaded connection with the third threaded hole, and the third locking screw can screw into one side of the jack and compress the second connecting rod.

2. The artificial vertebral body connection system of claim 1 wherein a stop is provided at the other end of the second link, the stop having a diameter greater than the diameter of the receptacle.

3. The artificial vertebral body connection system of claim 1 wherein the first locking screw, the second locking screw and the third locking screw are all disposed obliquely toward one side of the longitudinal connecting rod and form an angle of 45 degrees with the telescoping directions of the first link and the second link.

4. The artificial vertebral body connection system of claim 1 wherein the receptacle is a circular hole and the second link is a cylinder.

5. The artificial vertebral body connection system of claim 1 wherein the interior of the artificial vertebral body is configured as a void structure and the outer surface of the artificial vertebral body is smooth.

6. The artificial vertebral body connection system of claim 1 wherein an upper end surface of the artificial vertebral body mates with a lower end surface of the upper healthy vertebral body and a lower end surface of the artificial vertebral body mates with an upper end surface of the lower healthy vertebral body.