CN202537716U

CN202537716U - Artificial cervical vertebra

Info

Publication number: CN202537716U
Application number: CN2012201789247U
Authority: CN
Inventors: 欧阳钧; 陈春; 吴长福
Original assignee: Southern Medical University
Current assignee: Southern Medical University
Priority date: 2012-04-24
Filing date: 2012-04-24
Publication date: 2012-11-21
Anticipated expiration: 2022-04-24

Abstract

The utility model relates to a prosthesis for a spine and specifically relates to an artificial cervical vertebra. The artificial cervical vertebra comprises an L-shaped upper supporting plate (1) and an L-shaped lower supporting plate (2) which are respectively constituted by transverse edges and vertical edges, a support column arranged between the transverse edges of the upper and lower supporting plates (1, 2) and screws (4) for fixing the vertical edges of the upper and lower supporting plates (1, 2) on the vertebra (9), and is characterized in that the support column is a cylindrical titanium cage (3); cylindrical pins (7) are vertically arranged on the outer sides of the transverse edges of the upper and lower supporting plates (1, 2), and the two cylindrical pins (7) respectively extend into the titanium cage (3) from the two ends and are in movable fit with the titanium cage (3); and at least two positioning screws (5) are respectively arranged at the parts matched with the cylindrical pins (7) at the two ends of the titanium cage (3). The artificial vertebra has the advantages of convenience in implantation and firmness.

Description

A kind of artificial vertebral body of cervical vertebra

Technical field

This utility model relates to a kind of prosthese, is specifically related to a kind of prosthese that is used for spine, and this prosthese can be used for the reconstruction of cervical vertebral body.

Background technology

At present, undergo surgery after the excision to due to illness becoming sufferer vertebral body that (like tumor, multi-segmental intervertebral disk hernia etc.) or wound cause among the cervical vertebra patient clinically, need carry out the manual work of vertebral body and rebuild.The reconstructing device of vertebral body is made up of titanium cage and steel plate screw fixing system usually; Wherein, The titanium cage is positioned over is cut the vertebral body position; In order to the vertebral body that replaces being excised, two of titanium cage is supported on and is cut the adjacent end of two vertebral bodys up and down of vertebral body, the vertebra that the titanium cage is implanted into autologous ilium, allograph bone or excises from body; Steel plate screw fixing system is used for being fixedly connected with adjacent two vertebral bodys up and down of quilt excision vertebral body.Be separated from each other between titanium cage in this device and the steel plate screw fixing system, titanium cage wherein only clamps by the vertebral body that is positioned at its two, thereby fixing not firm, is easy to, even comes off.Publication number is that the utility model patent of CN1053004A discloses a kind of " the adjustable artificial vertebral body of L type "; This artificial vertebral body is made up of the upper and lower supporting plate of L type and the adjustable prop that is articulated between the upper and lower supporting plate; Wherein, The adjustable prop of being addressed is made up of upper and lower adjusting rod and adjusting tube, and of upper and lower adjusting rod is hinged with the horizontal component of upper and lower supporting plate respectively, and the other end of upper and lower adjusting rod is connected with a head thread of regulating tube.In this patent scheme; The hinged articulated structure of the horizontal component of upper and lower adjusting rod and upper and lower supporting plate has two kinds; First kind of scheme is: the connection end of upper and lower adjusting rod is cylindrical; Insert in the cylindrical hole of horizontal component bottom of upper and lower supporting plate this end, and be provided with one and prevent the radial alignment pin that both rotate; Second kind of scheme is: the connection end of upper and lower adjusting rod is a spheroid, and the horizontal component of upper and lower supporting plate bottom is provided with the spherical nest that matches, described spheroid insert should the sphere nest in.For first kind of scheme; During installation, appropriate location and the drivescrew of must be earlier upper and lower supporting plate being adjusted to vertebral body are fixed, and then load onto adjustable prop; Otherwise; If earlier upper and lower supporting plate is connected in aggregates reinstalling with adjustable prop, upper and lower supporting plate just can not independently freely rotate with respect to adjustable prop, therefore also just can not it be adjusted to the appropriate location of vertebral body; For second kind of scheme, can be before operation earlier upper and lower supporting plate is connected with adjustable prop in aggregates, during operation; Integral body is packed into, and then adjustment, and upper and lower supporting plate to suitable position and drivescrew fixed; This installation method obviously can reduce the time of operation, alleviates the patient suffering, but after installing; Still can relatively rotate between upper and lower supporting plate and the adjustable prop, this connection is obviously insecure, fixed effect.In addition, the alternative adjustable prop by the excision vertebral body in this patent scheme is a metal structure, and can not put into sclerotin increases its bone fusion rate.

Summary of the invention

This utility model technical problem to be solved is the artificial vertebral body that supplies a kind of cervical vertebra, and this artificial vertebral body has to be implanted conveniently, and firm advantage.

This utility model solves this technical problem the technical scheme that is adopted:

A kind of artificial vertebral body of cervical vertebra; Pillar between L shaped upper and lower supporting plate that it is made up of horizontal edge and vertical edge and the horizontal edge that is located at upper and lower supporting plate and the screw that the vertical edge of upper and lower supporting plate is fixed on the cone constituted; It is characterized in that described pillar is a columniform titanium cage; The outside vertical of the horizontal edge of described upper and lower supporting plate is provided with straight pin, two straight pins respectively by two put in the said titanium cage, and with it movingly; Described titanium cage two with the periphery straight pin auxiliary section on be respectively equipped with two dog screws at least.

In technique scheme, in order to obtain bigger hold, described screw generally adopts pedicle screw, wears a pedicle screw on each L type supporting plate usually, in addition, obtains bigger hold if desired, can also add a short screw again.

The artificial vertebral body of the described cervical vertebra of this utility model, because wherein pillar has adopted the titanium cage, therefore implantable autologous ilium in the titanium cage, allograph bone or from the vertebra of body excision have bone fusion rate preferably.

The artificial vertebral body of the described cervical vertebra of this utility model, before operation, (this moment, dog screw only needed pretension to be linked to be an integral body through dog screw between upper and lower supporting plate and the titanium cage; As long as can guarantee not break away between upper and lower supporting plate and the titanium cage), during operation artificial vertebral body integral body is embedded in the space of being cut vertebral body, at this moment; Unclamp dog screw; Adjustment mounting plate or bottom plate to suitable position, the locking positioning screw is squeezed into pedicle screw at last then.It is thus clear that the artificial vertebral body of this patent scheme can integral body be packed into, so operating time is short, and, both can relatively rotate between upper and lower supporting plate and the titanium cage, be convenient to adjust the position of upper and lower supporting plate, also can lock by dog screw, be connected firmly.

Description of drawings

Fig. 1～Fig. 3 is the structural representation of a specific embodiment of the artificial vertebral body of the described cervical vertebra of this utility model, and wherein, Fig. 1 is a front view, and Fig. 2 is a right view, and Fig. 3 is a vertical view.

Fig. 4 is a user mode figure of the artificial vertebral body of the described cervical vertebra of this utility model.

Fig. 5 is another user mode figure of the artificial vertebral body of the described cervical vertebra of this utility model.

The specific embodiment

Referring to Fig. 1～Fig. 3, the artificial vertebral body of the cervical vertebra of this utility model is made up of L shaped mounting plate 1, L shaped bottom plate 2, pillar, dog screw 5 and screw 4.Described mounting plate 1 is formed by connecting by orthogonal horizontal edge and vertical edge with bottom plate 2, wherein, the circular arc that vertical edge is and vertebral body 8 profile phases mate, the end face of the inboard of horizontal edge and vertebral body 8 is fitted, and fit in the side of the inboard of vertical edge and vertebral body 8; Be equipped with a skew nailing hole 6 and two straight nail hole 6-1 of being used to wear screw 4 on the vertical edge of mounting plate 1 and bottom plate 2; Wherein, Skew nailing hole 6 is used to wear pedicle screw; Straight nail hole 6-1 is used to wear short screw, and the particular location of described skew nailing hole 6 and straight nail hole 6-1 can be confirmed according to the concrete shape and structure of fixed vertebral body 8 with it; The outside of the horizontal edge of mounting plate 1 and bottom plate 2 is equipped with a straight pin 7.Described pillar is the titanium cage 3 of a cylindrical tube shape; This titanium cage 3 is welded by the cage body portion of the band diamond hole at middle part and the coupling part at two; Wherein, The wall thickness of described coupling part is greater than the wall thickness at cage body place, and the wall of each coupling part is provided with two screwed holes that are positioned on the same plane, coupling one location screw 5 on each screwed hole.Straight pin 7 on described mounting plate 1 and the bottom plate 2 inserts respectively in the coupling part at described titanium cage 3 two; According to the needs in the use; Above-mentioned dog screw 5 can be locked; Make to be fixedly connected between mounting plate 1 and bottom plate 2 and the titanium cage 3, also can unclamp, make to relatively rotate between mounting plate 1 and bottom plate 2 and the titanium cage 3.

Referring to Fig. 4, earlier that the artificial vertebral body integral installation of this patent is good before the art during use, and pretension dog screw 5; During operation, artificial vertebral body integral body is packed in the vertebral body space of being excised, adjust the position of titanium cage 3 after; Unclamp dog screw 5; To the position that is suitable for most squeezing into pedicle screw, the locking positioning screw 5 then, squeeze into pedicle screw at last with mounting plate 1 and bottom plate 2 rotations.

Referring to Fig. 5, be connected more firmly in order to make between mounting plate 1 or bottom plate 2 and the vertebral body 8, except that being provided with described pedicle screw, can also from straight nail hole 6-1, squeeze into a short screw on the vertical edge of mounting plate 1 or bottom plate 2.

Claims

1. the artificial vertebral body of a cervical vertebra; Pillar between L shaped upper and lower supporting plate (1,2) that it is made up of horizontal edge and vertical edge and the horizontal edge that is located at upper and lower supporting plate (1,2) and the screw (4) that the vertical edge of upper and lower supporting plate (1,2) is fixed on the cone (9) constituted; It is characterized in that described pillar is a columniform titanium cage (3); The outside vertical of the horizontal edge of described upper and lower supporting plate (1,2) is provided with straight pin (7), two straight pins (7) respectively by two put in the said titanium cage (3), and with it movingly; At least be respectively equipped with two dog screws (5) on described titanium cage (3) two and periphery straight pin (7) auxiliary section.

2. the artificial vertebral body of a kind of cervical vertebra according to claim 1 is characterized in that, described screw (4) is a pedicle screw.