CN2868244Y

CN2868244Y - Intervertebral filler

Info

Publication number: CN2868244Y
Application number: CNU2005200447558U
Authority: CN
Inventors: 叶安时
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-02
Filing date: 2005-09-02
Publication date: 2007-02-14
Anticipated expiration: 2015-09-02

Abstract

The utility model provides a spinal cage filler, which is used to be installed between the two spinal adjacent vertebral endplates of human body as the artificial disc. The spinal cage filler of this utility model is mainly comprised of a first support, a second support and a coating. Wherein, the first support and the second support can rotate relatively because of the activities of the human body, while the utility model mainly covers the first support and the second support by the coating, thus making the first support and the second support only rotate within the coating, in order to further restricting the scope of rotation of the first support and the second support, at the same time, the generated debris due to the rotation of the first support and the second support are also retained in the coating, so as to avoid the debris entering the human body to cause other complications. In addition, because the coating uses the soft materials, so the utility model can prevent the first support and the second support plunging into the spine during the rotation.

Description

Intervertebral stuff

Technical field

This utility model relates to a kind of intervertebral stuff, the intervertebral stuff between particularly a kind of any two adjacent terminal plate of vertebral body that are adapted to be mounted to human vertebra.

Background technology

Intervertebral disc between the terminal plate of vertebral body of human vertebra is a delicate structure that quite meets theory of mechanics.The core of intervertebral disc central authorities is about 1.5 centimeters of diameters, by being full of the vertebral pulp that liquid constitutes, have deformability and can bear the pressure of vertebra, peripheral then be that fibrous ring by the crisscross arrangement of multilamellar is constituted, tough structure can be kept the stability of core, so intervertebral disc natural buffer body that is human body, can share the pressure that vertebra bears, avoid vertebra to sustain damage.

Yet human body is often because carrying heavy goods, undue force, secular fault, the compressing of conceived middle and late stage or lower back is subjected to factors such as gravity impact cause intervertebral disk hernia.Degree can cause fibrous ring to expand than the lighter but still be complete, is called " intervertebral disk hernia " clinically.The heavier person of degree then causes fibrous ring to break, and vertebra nuclear overflows, and is urged to spinal nerve, is called " extrusion takes off or be outstanding " clinically.Wherein, especially, cause function undesired, need intervertebral disc to be taken out, and install an artificial intervertebral disc, so that the spinal column of sufferer supports and be returned to original shape and position with operation with the easier degeneration of auld people's intervertebral disc.

Seeing also illustrated in figures 1 and 2ly, is a kind of outside drawing of artificial intervertebral implant of prior art and the sketch map that this artificial intervertebral implant is installed in vertebral body.The artificial intervertebral implant 100 of prior art is made of one first supporter 110 and one second supporter 120.Wherein, first supporter 110 has two opposite ends, and wherein an end convexes with one first pilot pin 112, and the other end then has an arc floating convex 114.And second supporter 120 has two opposite ends equally, and wherein an end convexes with one second pilot pin 122, and the other end then has an arc-shaped recess face 124.When assembling, the arc floating convex 114 of first supporter 110 and the arc-shaped recess face 124 of second supporter 120 are accepted mutually, and first pilot pin 112 of first supporter 110 and second pilot pin 122 of second supporter 120 thrust respectively between any two adjacent terminal plate of vertebral body 10, so that first supporter 110 and second supporter 120 can relatively rotate with the activity that cooperates human body by the setting of arc floating convex 114 and arc-shaped recess face 124.

Yet the intervertebral stuff of prior art has following point in use.At first, the arc-shaped recess face 124 of the arc floating convex 114 of first supporter 110 and second supporter 120 is not subjected to suitable restriction when relatively rotating, and makes easily the separation of bursting apart of two supporters because of external force collision or inordinate rotation.That is to say that the intervertebral stuff of prior art can't effectively be controlled the slewing area of 120 of first supporter 110 and second supporters.Secondly, the arc-shaped recess face 124 of the arc floating convex 114 of first supporter 110 and second supporter 120 can produce chip because of friction when relatively rotating, and these chips enter and can lead to complications in the human body, and then the health of remote-effects human body.In addition, first supporter 110 and second supporter 120 all are that the synthetic material of metal material or hard constitutes, so human body is when activity, can't provide buffered stressed passage sharing the stress that vertebra is born, and be easy to generate discomfort.

The utility model content

The technical problems to be solved in the utility model provides a kind ofly can control two slewing areas between supporter, and can avoid two supporters to rotate the chip that is produced entering the intravital intervertebral stuff of people.

In order to solve the problems of the technologies described above, this utility model provides a kind of intervertebral stuff, be arranged between the wantonly two adjacent terminal plate of vertebral body of human body, its special character is, described intervertebral stuff comprises one first supporter, have two opposite ends, the one end convexes with at least one first pilot pin, and the other end has an arc floating convex; One second supporter, have two opposite ends, the one end convexes with at least one second pilot pin, and the other end has an arc-shaped recess face, the described arc floating convex of described first supporter and the described arc-shaped recess face of described second supporter are accepted mutually, make can relatively rotate between described first supporter and described second supporter; And cladding, described cladding coats described first supporter and described second supporter, and expose described first pilot pin and described second pilot pin at least, can be fixedly set in respectively on any two adjacent terminal plate of vertebral body for described first pilot pin and described second pilot pin, described cladding the slewing area that can limit between described first supporter and described second supporter is set, being provided with of described cladding can be rotated the clast that is produced with described first supporter and described second supporter and be deposited in the described cladding.

In order to solve the problems of the technologies described above better, first supporter described in this utility model and described second supporter are hard material.In this utility model, described hard material is metal or plastics.In this utility model, described cladding is a flexible material, and being provided with of described cladding can prevent to be absorbed in vertebral body because of the human pressure causes described first supporter, described second supporter.In this utility model, described flexible material is silica gel or the elastic macromolecular material of tool.In this utility model, the outer surface of described cladding have towards the axis direction of described first supporter and described second supporter recessed as the sunk area between relief area.

Adopt intervertebral stuff of the present utility model, the technique effect that can realize is the slewing area between restriction first supporter and second supporter, and first supporter and second supporter rotate the clast that is produced and can reside in the cladding, cause other complication to avoid this clast to expose.In addition, the material of cladding is soft, so can prevent because the human pressure causes first supporter and second supporter to be absorbed in vertebral body.

Description of drawings

Fig. 1 is the outside drawing of a kind of artificial intervertebral implant of the prior art.

Fig. 2 is the sketch map that artificial intervertebral implant shown in Figure 1 is installed in vertebral body.

Fig. 3 is the three-dimensional exploded view of intervertebral stuff of the present utility model.

Fig. 4 is the three-dimensional combination figure of intervertebral stuff of the present utility model.

Fig. 5 is the sketch map that intervertebral stuff of the present utility model is arranged at vertebral body.

The specific embodiment

Present accompanying drawings specific embodiment of the utility model.

At first, see also Fig. 3, Fig. 4 and shown in Figure 5, any two adjacent terminal plate of vertebral body 20 catch cropping that intervertebral stuff 200 of the present utility model is used for being installed in human body are artificial intervertebral disc, in the present embodiment, intervertebral stuff 200 mainly is made of one first supporter 210, second supporter 220 and a cladding 230.

First supporter 210 has two opposite ends, wherein to convex with the quantity of one first pilot pin 212, the first pilot pins 212 can be a plurality of to an end, and the other end is provided with an arc floating convex 214, the material of first supporter 210 is the hard material manufacturing, adopts metal or plastics here; Second supporter 220 has two opposite ends equally, wherein an end convexes with one second pilot pin 222, the quantity of second pilot pin also can be a plurality of, the other end is provided with an arc-shaped recess face 224, the material of second supporter 220 is similarly the hard material manufacturing, adopts metal or plastics here.The arc floating convex 214 of first supporter 210 can be accepted mutually with the arc-shaped recess face 224 of second supporter 220, be that both external forms of arc floating convex 214 and arc-shaped recess face 224 are the designs that is consistent, so that can relatively rotate between first supporter 210 and second supporter 220.Cladding 230 coats first supporter 210 and second supporter 220, and expose first pilot pin 212 and second pilot pin 222 at least, so that first pilot pin 212 and second pilot pin 222 can be fixedly set in respectively on any two adjacent terminal plate of vertebral body 20, and the material of cladding 230 adopts flexible material, here adopt the macromolecular material with biocompatibility, its macromolecular material can be a silastic, polyurethane and block copolymer thereof, terylene, nylon, polypropylene, polyolefin, Merlon, polrvinyl chloride, polyacrylate, polymethyl methacrylate, methyl methacrylate and styrol copolymer, polyethylene, silastic terylene complex, politef, natural rubber, silica gel, the fluorine silastic, polyurethane or polymethyl-benzene silicon acid fat etc.

Therefore, when operation, at first first supporter 210 and second supporter 220 are overmolding to incorporate member by cladding 230, then utilize instrument that two terminal plate of vertebral body 20 are strutted, and intervertebral stuff 200 of the present utility model inserted 20 of two terminal plate of vertebral body, the instrument that will strut two terminal plate of vertebral body 20 is removed then, and this moment, two terminal plate of vertebral body 20 will be close to intervertebral stuff 200.Simultaneously, the surface that two terminal plate of vertebral body 20 will be thrust in the tip of first pilot pin 212 and second pilot pin 222 can be finished fixing.Certainly, the person skilled in the art should be known in when operation the many method for posting that can realize, is not the technology that this utility model is put down in writing, so do not limited and give unnecessary details at this.

It should be noted that, in the present embodiment, the main setting that sees through cladding 230 so that first supporter 210 and second supporter 220 only can rotate, and then can limit the slewing area of 220 of first supporter 210 and second supporters in cladding 230.So be provided with, can avoid first supporter 210 and second supporter 220 thereby inordinate rotation and burst apart and separate.In addition,, first supporter 210 and second supporter 220 can be rotated the clast that is produced and be deposited in the cladding 230, enter human body to avoid this clast, and cause other complication by the setting of cladding 230.

In addition, see also shown in Figure 5ly, in the present embodiment, the outer surface of cladding 230 has towards a recessed sunk area 232 of the axis direction (identical with the vertebra direction) of first supporter 210 and second supporter 220, in order to as between a relief area.Therefore, by cladding 230 for the setting of flexible material and sunk area 232 when two adjacent two terminal plate of vertebral body 20 because the pressure of vertebra when oppressing mutually, cladding 230 can provide a buffered power more, and can share the stress that vertebra bears, make human body more comfortable when activity.Moreover, because the material of cladding 230 adopts flexible material, can prevent more because the phenomenon that the human pressure causes first supporter 210, second supporter 220 to be absorbed in vertebral body takes place.

In sum, intervertebral stuff of the present utility model has following advantages at least. The first, Can control the slewing area between first supporter and second supporter, to avoid two supports The body separation of bursting apart because of inordinate rotation. The second, two supporters rotations can be produced Clast is stored, and produces pathology to avoid this clast to enter human body. The 3rd, can carry The induction pressure that is born to share vertebra for enough buffering powers, make human body when activity more For comfortable. The 4th, cladding adopts flexible material, can prevent the sagging neurocoele that causes of centrum Narrow.

Claims

1, a kind of intervertebral stuff (200) is characterized in that: described intervertebral stuff (200) comprises

One first supporter (210) has two opposite ends, and the one end convexes with at least one first pilot pin (212), and the other end has an arc floating convex (214);

One second supporter (220), have two opposite ends, the one end convexes with at least one second pilot pin (222), and the other end has an arc-shaped recess face (224), the described arc floating convex (214) of described first supporter (210) and the described arc-shaped recess face (224) of described second supporter (220) are accepted mutually, make can relatively rotate between described first supporter (210) and described second supporter (220); And

A cladding (230), this cladding (230) has the inner chamber of putting for described first supporter (210) and described second supporter (220), the upper and lower surface of this cladding (230) has the round mouth that exposes for described first pilot pin (212) and described second pilot pin (222) respectively, and described first pilot pin (212) and described second pilot pin (222) can be fixedly set in respectively on any two adjacent terminal plate of vertebral body.

2, intervertebral stuff according to claim 1 (200) is characterized in that: described first supporter (210) and described second supporter (220) are that a hard material is made.

3, intervertebral stuff according to claim 2 (200) is characterized in that: described hard material is metal or plastics.

4, intervertebral stuff according to claim 1 (200) is characterized in that: described cladding (230) is a flexible material.

5, intervertebral stuff according to claim 4 (200) is characterized in that: described flexible material is the macromolecular material with biocompatibility.

6, intervertebral stuff according to claim 1 (200) is characterized in that: the outer surface of described cladding (230) have towards the axis direction of described first supporter (210) and described second supporter (220) recessed as the sunk area between relief area (232).