CN211156489U - Movable artificial vertebral body - Google Patents

The utility model discloses a movable artificial vertebral body, which comprises an upper fixed body with L type structure, two surfaces of L type are both attached with the surface of the upper vertebral body, an intermediate connecting body arranged below the upper fixed body and arranged at the vacancy position of the vertebral body, a lower fixed body arranged below the intermediate connecting body and provided with an inverted L type structure, two surfaces of the inverted L type are both attached with the surface of the lower vertebral body, and an upper rotating connecting piece and a lower rotating connecting piece, wherein the upper rotating connecting piece comprises an upper connecting lining embedded at the top of the intermediate connecting body and provided with a spherical groove, the inlet edge of the spherical groove is provided with an upper shrinkage frame, and an upper joint ball with a spherical structure embedded in the spherical groove of the upper connecting lining, the top of the spherical structure is provided with an upper bulge fixedly connected with the L type structure.

Movable artificial vertebral body

Technical Field

The utility model relates to an implant false body, concretely relates to movable artificial centrum.

Background

The vertebral body is the main part of the vertebra load, is in a short cylinder shape, and is filled with cancellous bone inside, such as lumbar vertebra, cervical vertebra and the like. The pathological changes of the vertebral bodies cause the problems of uneven bone density of the vertebral bodies, bone destruction and the like, for example, the tuberculosis of the vertebral bodies, which is the most common among the bone joint tuberculosis, accounts for more than half of the tuberculosis, is better to be found in children and young people, in recent years, the elderly over 60 years old have an increasing trend, the diseased parts are the most lumbar vertebrae of adults, the inferior thoracic vertebrae and the least cervical vertebrae, the most thoracic vertebrae and the inferior cervical vertebrae of children are, about 90% of the pathological changes of the tuberculosis are in the vertebral bodies, a plurality of vertebral bodies are frequently involved, the spinal cords and nerves are possibly damaged, the vertebral joints collapse and the angular deformity of the spinal cords are possibly caused, and the patients with obvious neurological dysfunction or angular deformity need to carry out vertebrectomy.

The artificial vertebral body implantation technology is a surgical technology for reconstructing the stability of the spine by an artificial vertebral body implantation method adopted for vertebral body defects caused by excision of a diseased vertebral body. Traditional operation adopts bone grafting fusion or titanium cage fusion after getting rid of the focus more, though can reach the operation purpose, nevertheless because the multistage centrum fuses, makes the cervical vertebra lose original mobility, causes the centrum activity limited, also has more postoperative risk simultaneously, because the diaphysis of planting or titanium cage can't with link up the centrum end plate from top to bottom and match completely, easily cause the displacement of bone grafting, slippage, the titanium cage sinks, sinks etc. to cause the secondary injury to the patient.

Disclosure of Invention

The utility model aims at providing a movable artificial centrum, this artificial centrum have solved the current problem that adopts bone grafting to fuse or the fusion of titanium cage leads to the multistage centrum to fuse and makes the cervical vertebra lose original activity degree, can make artificial centrum have certain activity degree.

In order to achieve the above object, the present invention provides a movable artificial vertebral body, comprising an upper fixed body having an L-type structure, two faces of L type being attached to the surface of the upper vertebral body, an intermediate connecting body disposed below the upper fixed body and disposed at the vacant position of the vertebral body, a lower fixed body disposed below the intermediate connecting body and having an inverted L-type structure, two faces of inverted L type being attached to the surface of the lower vertebral body, an upper rotating connector disposed between the upper fixed body and the intermediate connecting body for rotatably connecting the upper fixed body and the intermediate connecting body, and a lower rotating connector disposed between the lower fixed body and the intermediate connecting body for rotatably connecting the lower fixed body and the intermediate connecting body.

The upper rotating connecting piece comprises an upper connecting lining which is embedded at the top of the middle connecting body and is provided with a spherical groove, the inlet edge of the spherical groove is provided with an upper contraction frame, the spherical structure of the upper joint ball is embedded in the spherical groove of the upper connecting lining, and the top of the spherical structure of the upper joint ball is provided with an upper bulge which is fixedly connected with the L-shaped structure.

The lower rotating connecting piece comprises a lower connecting lining which is embedded at the bottom of the middle connecting body and is provided with a spherical groove, the inlet edge of the spherical groove is provided with a lower contraction frame, a lower joint ball is embedded in the spherical groove of the lower connecting lining in a spherical structure, and the bottom of the spherical structure is provided with a lower bulge which is fixedly connected with the inverted L-shaped structure.

Preferably, the material of the upper connecting lining and the material of the lower connecting lining both comprise: polyethylene.

Preferably, the upper joint ball and the L-type structure are connected through riveting or welding for fixation, and the lower joint ball and the L-type structure are connected through riveting or welding for fixation.

Preferably, the L-shaped structure of the upper fixing body is provided with an upper fixing hole on the surface attached to the front surface of the upper vertebral body, and the inverted L-shaped structure of the lower fixing body is provided with a lower fixing hole on the surface attached to the front surface of the lower vertebral body.

Preferably, the upper fixing hole and the lower fixing hole are fixed with the upper vertebral body and the lower vertebral body respectively through screws.

Preferably, in the L-shaped structure of the upper fixing body and the inverted L-shaped structure of the lower fixing body, a first hollowed-out contact surface and a first biological ceramic coating are alternately arranged on the surface which is attached to the surface of the vertebral body.

Preferably, the surface of the middle connecting body, which is attached to the surface of the vertebral body, is provided with: a second hollowed-out contact surface and a second biological ceramic coating.

Preferably, the L-type structure of the upper fixing body or the inverted L-type structure of the lower fixing body is provided with a joint ball fixing groove for fixing the upper protrusion or the lower protrusion.

The utility model discloses a movable artificial centrum has solved the current problem that adopts bone grafting to fuse or the fusion of titanium cage leads to the multistage centrum to fuse and make the cervical vertebra lose original activity degree, has following advantage:

(1) the movable artificial vertebral body of the utility model realizes the movement between the artificial vertebral bodies by arranging the upper rotating connecting piece between the upper fixing body and the middle connecting body and arranging the lower rotating connecting piece between the lower fixing body and the middle connecting body, thereby avoiding the problem that the cervical vertebra loses the original mobility due to multi-section vertebral body fusion caused by the traditional bone grafting fusion or titanium cage fusion;

(2) the movable artificial vertebral body of the utility model enables the artificial vertebral body to move freely by connecting the lining and the joint ball, and the design of the shrinkage frame of the spherical groove on the lining, when the joint ball is installed, the shrinkage frame of the spherical groove is expanded and is easy to insert, after the joint ball is inserted, the self-locking is realized due to the automatic shrinkage function of the shrinkage frame, the installation is simple and convenient, and the limiting effect is realized by the shrinkage frame;

(3) the utility model discloses a movable artificial centrum through setting up fretwork contact surface and biological ceramic coating, promotes the growth of bone on the one hand, and on the other hand realizes that the later stage bone grows into through the fretwork contact surface for bony fusion between false body and the skeleton.

Drawings

Fig. 1 is an exploded view of the movable artificial vertebral body of the present invention.

Fig. 2 is a schematic bottom structure diagram of the upper fixing body of the present invention.

Fig. 3 is a schematic top structure diagram of the upper fixing body of the present invention.

Fig. 4 is a schematic structural diagram of the upper joint ball of the present invention.

Fig. 5 is a schematic structural view of the upper connecting lining of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses a movable artificial centrum through rotating the connecting piece on setting up between last fixed body and the intermediate junction body, rotates the connecting piece under setting up between fixed body and the intermediate junction body under, has realized the activity between the artificial centrum, has avoided traditional adoption to plant the bone to fuse or the fusion of titanium cage leads to the multistage centrum to fuse the problem that makes the cervical vertebra lose original activity degree. And the movable function is realized through the matching of the upper and lower fixing bodies, the joint ball and the connecting lining and the joint ball.

According to the utility model discloses an embodiment, go up the fixed orifices and all fix with last centrum and lower centrum respectively through the screw with lower fixed orifices.

The utility model discloses a movable artificial centrum through fretwork contact surface and biological ceramic coating, promotes the growth of bone on the one hand, and on the other hand realizes that the later stage bone grows into through the fretwork contact surface for bony fusion between false body and the skeleton.

The utility model discloses a method for using movable artificial centrum specifically as follows:

Through last fixed body and the middle connector between last rotation connecting piece, lower rotation connecting piece between lower fixed body and the middle connector has realized the activity between the artifical centrum, has avoided the tradition to adopt bone grafting to fuse or the fusion of titanium cage leads to the multistage centrum to fuse the problem that makes the cervical vertebra lose original activity degree.

Meanwhile, the hollow contact surface and the biological ceramic coating promote the growth of bones and the growth of later-stage bones, so that the prosthesis and the bones are fused together.

While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.