CN203354708U

CN203354708U - Artificial vertebral body

Info

Publication number: CN203354708U
Application number: CN201320317227XU
Authority: CN
Inventors: 王彩梅
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2013-06-03
Filing date: 2013-06-03
Publication date: 2013-12-25
Anticipated expiration: 2023-06-03

Abstract

The utility model provides an artificial vertebral body. The artificial vertebral body comprises a vertebral main body, an upper vertebral body supporting plate arranged at the upper end of the vertebral main body and a lower vertebral supporting plate arranged at the lower end of the vertebral main body, wherein a plurality of buffer slots stretching in the circumferential direction are formed in the vertebral main body. According to the artificial vertebral body, through the fact that the buffer slots are formed in the vertebral main body, the dynamic stability and mobility of the cervical vertebra are maintained, and dynamic fixation is achieved. Meanwhile, the influences of complications such as load increase and regression acceleration on adjacent sections are improved effectively, and an effective measure for the rehabilitation of the cervical vertebra is provided.

Description

Artificial vertebral body

Technical field

This utility model relates to bone surgery implanting prosthetic field, especially, relates to a kind of artificial vertebral body.

Background technology

Since Hamdi reported first L2 plasmocytomas in 1969 and the capable vertebral tumor excision of adenocarcinoma metastatic, prosthese substitute, artificial vertebral body is used widely clinically as the effective vertebral body substitute of a class, its material is different, allograph bone, pottery, metal etc. are arranged, but the artificial vertebral body of every kind of material all there are pluses and minuses.As allograph bone exists that source is limited, immunological rejection etc., frangible and easily by fatigue rupture in the ceramic-like body, metal is implanted and is brought bone stress to shield and the bone resorption problem.In recent years, along with compound vertebral body substitution material has appearred in the development of tissue engineering, it can provide immediate postoperative stability can form the permanent bone fusion with vertebral body again.Now, the artificial vertebral body kind of design, also from initial simple support type, develops into the adjustable fixed pattern that can recover vertebral height.Yet no matter be that the change of the change of material or support modes is all for being merged spinal column, its maximum shortcoming is the activeness of thoroughly having removed the operative site cervical vertebra, in clinical practice and the test of a series of biomechanics, demonstrate, traditional artificial vertebral body remains in some aspects at some problem to be solved, particularly the stability of postoperative axial-rotation aspect is inadequate, low etc. with the early stage bond strength of upper hypocentrum, its complication is easily to cause the implant displacement even to be deviate from, operative site spinal motion function limitation, the spinal column of neighbouring section is because a series of loads that compensatory ground over-activity brings increase, regression acceleration etc.

The utility model content

This utility model purpose is to provide a kind of artificial vertebral body, to solve the inadequate technical problem of stability of the postoperative axial-rotation of artificial vertebral body aspect.

For achieving the above object, this utility model provides a kind of artificial vertebral body, comprises the vertebral body main body; The vertebral body mounting plate, be arranged on the upper end of vertebral body main body; The vertebral body bottom plate, be arranged on the lower end of vertebral body main body; Be provided with the dashpot that circumferentially extend on a plurality of edges on the vertebral body main body.

Further, the staggered side that connects the vertebral body main body of a plurality of dashpots.

Further, a plurality of dashpots are parallel to each other.

Further, the groove of a plurality of dashpots height is t, 1mm≤t≤2mm.

Further, artificial vertebral body also comprises and vertebral body mounting plate upper stiff end connected vertically, on upper stiff end, is provided with for the first fixing screw hole.

Further, artificial vertebral body also comprises and vertebral body bottom plate lower stiff end connected vertically, on lower stiff end, is provided with for the second fixing screw hole.

Further, be provided with the upwardly extending upper positioning convex for fixing on the vertebral body mounting plate; Be provided with the lower positioning convex for fixing to downward-extension on the vertebral body bottom plate.

Further, upper positioning convex and lower positioning convex are tapered protrusion.

Further, the height of upper positioning convex and lower positioning convex is p, 1mm≤p≤3mm.

Further, be provided with the first bio-ceramic coating on the vertebral body mounting plate; Be provided with the second bio-ceramic coating on the vertebral body bottom plate.

The utlity model has following beneficial effect:

This utility model artificial vertebral body by arranging a plurality of dashpots on the vertebral body main body, the dynamic stability and the activeness that have retained cervical vertebra, realized dynamically fixing, effectively improved the impact on complication such as the increase of neighbouring section load, regression acceleration, for the rehabilitation of cervical vertebra provides a kind of effective means simultaneously.

Except purpose described above, feature and advantage, this utility model also has other purpose, feature and advantage.Below, with reference to figure, this utility model is described in further detail.

The accompanying drawing explanation

The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining this utility model, does not form improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 is the axle side schematic diagram according to artificial vertebral body of the present utility model;

Fig. 2 is the schematic diagram that hold-down screw is not installed according to artificial vertebral body of the present utility model;

Fig. 3 looks schematic diagram according to the master of artificial vertebral body of the present utility model;

Fig. 4 is the schematic top plan view according to artificial vertebral body of the present utility model; And

Fig. 5 is the schematic diagram according to the using state of artificial vertebral body of the present utility model.

Reference numeral in accompanying drawing is as follows: 10, vertebral body main body; 11, dashpot; 20, vertebral body mounting plate; 21, upper positioning convex; 22, upper stiff end; 23, the first screw hole; 24, the first bio-ceramic coating; 30, vertebral body bottom plate; 31, lower positioning convex; 32, lower stiff end; 33, the second screw hole; 34, the second bio-ceramic coating; 40, hold-down screw; 50, vertebral body.

The specific embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, but the multitude of different ways that this utility model can be defined by the claims and cover is implemented.

Referring to Fig. 1 to Fig. 5, according to artificial vertebral body of the present utility model, comprising: vertebral body main body 10; Vertebral body mounting plate 20, be arranged on the upper end of vertebral body main body 10; Vertebral body bottom plate 30, be arranged on the lower end of vertebral body main body 10; Be provided with a plurality of dashpots 11 on vertebral body main body 10.

Referring to Fig. 1 to Fig. 3, the staggered side that connects vertebral body main body 10 of a plurality of dashpots 11.A plurality of dashpots 11 are parallel to each other.The groove height of a plurality of dashpots 11 is t, 1mm≤t≤2mm.The number of dashpot 11 is 8 to 15.According to the artificial vertebral body of this utility model dynamic stability type, on the artificial vertebral body main body, be provided with by the dashpot parallel with vertebral body bottom plate 30 with vertebral body mounting plate 20 11, the high t=1～2mm of groove, staggered vertebral body one side that connects, the groove number is 8～15.Under the effect of neck load; vertebral body main body 10 with uniform dashpot 11 forms an elastic support structure; can do the support with favored policy motion by one way or another; to adapt to the needs of human cervical spine motion; when dashpot 11 is extruded closure; motion reaches capacity, and can prevent like this hyperkinesia of spinal column, carries out overload protection.

Referring to Fig. 1 to Fig. 3, artificial vertebral body also comprises and vertebral body mounting plate 20 upper stiff end 22 connected vertically, on upper stiff end 22, is provided with for the first fixing screw hole 23.With vertebral body bottom plate 30 lower stiff end 32 connected vertically, on lower stiff end 32, be provided with for the second fixing screw hole 33.Referring to vertebral body mounting plate 20 and the vertebral body bottom plate 30 of Fig. 2, upper stiff end 22, the lower stiff end 32 vertically established are arranged at edge, be distributed with on upper stiff end 22 on 4 the first screw holes 23, lower stiff end 32 and be distributed with 4 the second screw holes 33.Hold-down screw 40 is for being fixedly linked artificial vertebral body and human cervical spine vertebral body.

Referring to Fig. 1 to Fig. 4, on vertebral body mounting plate 20, be provided with upwardly extending for fixing upper positioning convex 21; Be provided with the lower positioning convex 31 for fixing to downward-extension on vertebral body bottom plate 30.Upper positioning convex 21 and vertebral body bottom plate 30 are tapered protrusion.The height of upper positioning convex 21 and lower positioning convex 31 is p, 1mm≤p≤3mm.There is upper positioning convex 21, the lower positioning convex 31 of thorn-like on the surface of vertebral body mounting plate 20 and vertebral body bottom plate 30, rising height p=1～3mm, this projection will embed among the upper hypocentrum connected therewith, can prevent the vertebral body prosthese slippage all around of implanting, and play the fixing effect of strengthening simultaneously.

Referring to Fig. 1 to Fig. 2, be provided with the first bio-ceramic coating 24 on vertebral body mounting plate 20; Be provided with the second bio-ceramic coating 34 on vertebral body bottom plate 30.Surface attachment at this vertebral body mounting plate 20 and vertebral body bottom plate 30 has the hydroxyl apatite bioceramic coating, this coating adopts the generally accepted hydroxyapatite sprayed technology of artificial joint to be manufactured, and this coating technology can fixedly play good effect for the initial stage of implant.

Referring to Fig. 4, the vertebral body main body 10 of artificial vertebral body and vertebral body mounting plate 20 and vertebral body bottom plate 30 shape of cross sections are the appearance profile similar to corpus vertebrae, and this contour shape can reach and the coincideing of corpus vertebrae maximum area, thereby increase the ability of carrying.

Referring to Fig. 5, according to the structural representation of the artificial vertebral body using state of this utility model dynamic stability type, artificial vertebral body will replace any sections vertebral body 50 of the 3rd to the 7th sections of cut human cervical spine.

A kind of operation process of the artificial vertebral body of this utility model dynamic stability type is:

At first, take out and need replaced impaired host's cervical vertebral body sections;

Secondly, select the suitably artificial vertebral body of the dynamic stability type of height, strut the sections of the impaired host vertebral body 50 be removed by the instrument appropriateness, the ready vertebral body prosthese of packing into, rest and reorganize the in case of necessity outer ledge position of upper hypocentrum, hypocentrum laminating on the lower stiff end 32 that makes the upper stiff end 22 of vertebral body mounting plate 20 and vertebral body bottom plate 30 and human body;

Again, select the hold-down screw 40 of suitable diameter and length, hold-down screw 40 is screwed in upper and lower two adjacent host health vertebral bodys by the first screw hole 23, the second screw hole 33, and now two adjacent host health vertebral bodys will fixedly secure by hold-down screw 40 and artificial vertebral body.

After the implanted human body of artificial vertebral body of this utility model dynamic stability type, positioning convex 21, lower positioning convex 31 on the lip-deep thorn-like of its upper and lower supporting plate, among the upper hypocentrum that embedding is connected therewith, prevent the vertebral body prosthese slippage all around of implanting, play the fixing effect of strengthening simultaneously.Simultaneously, the supporting plate surface attachment has hydroxyapatite the first bio-ceramic coating 24, the second bio-ceramic coating 34 will effectively bring into play the long upper ability of bone, can fixedly play good effect for the initial stage of implant.

As can be seen from the above description, this utility model the above embodiments have realized following technique effect:

The artificial vertebral body of this utility model dynamic stability type can be realized the interior fixing of the single vertebral resection operation in cervical vertebra front and back road, the dynamic stability and the activeness that have retained cervical vertebra simultaneously, realized dynamically fixing, effectively improved the impact on complication such as the increase of neighbouring section load, regression acceleration, for the rehabilitation of cervical vertebra provides a kind of effective means simultaneously.Adopted screw to fix simultaneously, spinous process is fixed, ripe hydroxyl apatite bioceramic coating technology is fixed, and therefore at initial stage of implant prosthese and later stage, stablely has effect preferably aspect fixing.Work vertebral body shape of cross section is the appearance profile similar to corpus vertebrae, can reach and the coincideing of corpus vertebrae maximum area, thereby increase the ability of carrying.The artificial vertebral body operation wound is little, and easy operating is convenient to promote, and application prospect is good.

The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for a person skilled in the art, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. an artificial vertebral body, is characterized in that, comprising:

Vertebral body main body (10);

Vertebral body mounting plate (20), be arranged on the upper end of described vertebral body main body (10);

Vertebral body bottom plate (30), be arranged on the lower end of described vertebral body main body (10);

Be provided with the dashpot (11) that circumferentially extend on a plurality of edges on described vertebral body main body (10).

2. artificial vertebral body according to claim 1, is characterized in that, the staggered side that connects described vertebral body main body (10) of a plurality of described dashpots (11).

3. artificial vertebral body according to claim 1, is characterized in that, a plurality of described dashpots (11) are parallel to each other.

4. artificial vertebral body according to claim 1, is characterized in that, the groove height of a plurality of described dashpots (11) is t, 1mm≤t≤2mm.

5. artificial vertebral body according to claim 1, is characterized in that, also comprises and described vertebral body mounting plate (20) upper stiff end connected vertically (22), on fixed end (22), is provided with for fixing the first screw hole (23).

6. artificial vertebral body according to claim 1, is characterized in that, also comprises and described vertebral body bottom plate (30) lower stiff end connected vertically (32), on described lower stiff end (32), is provided with for fixing the second screw hole (33).

7. artificial vertebral body according to claim 1, is characterized in that, on described vertebral body mounting plate (20), is provided with upwardly extending for fixing upper positioning convex (21); Be provided with the lower positioning convex (31) for fixing to downward-extension on described vertebral body bottom plate (30).

8. artificial vertebral body according to claim 7, is characterized in that, described upper positioning convex (21) and described lower positioning convex (31) are tapered protrusion.

9. artificial vertebral body according to claim 7, is characterized in that, the height of described upper positioning convex (21) and described lower positioning convex (31) is p, 1mm≤p≤3mm.

10. artificial vertebral body according to claim 1, is characterized in that, is provided with the first bio-ceramic coating (24) on described vertebral body mounting plate (20); Be provided with the second bio-ceramic coating (34) on described vertebral body bottom plate (30).