A kind of pedicle nailTechnical field
The present invention relates to a kind of medicine equipment, and in particular to a kind of pedicle nail.
Background technology
Backbone non-fusion technology, because it has the damage to backbone small, maintains backbone on treatment spinal lesionMobility and stability, the biomechanics characteristic of reconstruction of intervertebral disc prevent and mitigate regression acceleration of adjacent segment interverbebral disc etc.Advantage, in recent years many hospitals have begun to use, a piece of light of its application prospect.
At present, the pedicle nail used in spinal operation includes staple seat, locking jackscrew, screw body, screw bodyIt will be able to be in being fixedly connected for fixed angle with staple seat, Universal screw nail can also be connected into through bulb, ball cup.So tieThere is following defect in the pedicle nail of structure：Staple seat is monolithic construction, and staple seat is that one is fixed with screw bodyStructure, in trip bolt body, it is impossible to individually adjust the angle of staple seat and fastening screw, but pass through adjusting screw sheetThe angulation change of staple seat is realized in the position of body, the screw thread on screw body is caused secondary injury to pedicle of vertebral arch, extension is suffered fromThe rehabilitation duration of person, poor practicability.
The content of the invention
In view of the deficienciess of the prior art, the present invention provides a kind of pedicle nail, the staple seat of this pedicle nail includesThe attaching nut that can be adjusted relatively and U-shaped drawing bar fastener, realize that it is fixed, effectively without the position by adjusting screw bodyAvoid screw body and secondary injury is caused to pedicle of vertebral arch, be easy to doctor to operate, practicality is good.
In order to achieve the above object, the technical scheme that the present invention takes：
A kind of pedicle nail, including the outer surface of screw body, the screw body are provided with fastening thread, the screw sheetThe end of body is provided with attaching nut, and the end of the attaching nut is provided with a U-shaped drawing bar fastener, the attaching nut and U-shapedDrawing bar fastener junction rotates groove provided with fastener, and the fastener, which is rotated, is provided with fastener fixing hole and attaching nut in grooveFlat mouth screw socket；Offered in the U-shaped drawing bar fastener and be provided with and can consolidate with fastener in a drawing bar neck, the drawing bar neckDetermine the connector of hole mating connection, the drawing bar neck side, which is provided with, can be embedded within and in U-shaped drawing bar fastenerDrawing bar fastening bolt, the end of the drawing bar fixing bolt offers a flat mouth screw socket.
As optimal technical scheme, in order to ensure the steadiness of screw body, security performance is improved, is conducive to patient's healthMultiple, the screw body is set to integral structure with attaching nut.
As the insertion of optimal technical scheme, for convenience drawing bar, on the one hand ensure to be prevented effectively from two to pedicle of vertebral archSecondary injury, on the other hand ensures the tightness of screw body, passes through between the drawing bar fastening bolt and U-shaped drawing bar fastenerThread engagement connection.
Compared with prior art, the device have the advantages that：
The 1st, the attaching nut that can be adjusted relatively and U-shaped drawing bar fastener are set, without the position by adjusting screw bodyRealize that it is fixed, effectively prevent screw body and secondary injury is caused to pedicle of vertebral arch, be easy to doctor to operate, practicality is good.
2nd, screw body and attaching nut are set to integral structure, it is ensured that the steadiness of screw body, improve securityCan, be conducive to Rehabilitation.
3rd, connection is engaged by thread between drawing bar fastening bolt and U-shaped drawing bar fastener, facilitates the insertion of drawing bar,On the one hand ensure to be prevented effectively from the secondary injury to pedicle of vertebral arch, on the other hand ensure the tightness of screw body.
Brief description of the drawings
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation of attaching nut；
Fig. 3 is the structural representation of U-shaped drawing bar fastener；
Drawing reference numeral：1st, screw body, 2, fastening thread, 3, attaching nut, 4, U-shaped drawing bar fastener, 5, fastener rotatesGroove, 6, fastener fixing hole, 7, attaching nut's flat mouth screw socket, 8, drawing bar neck, 9, connector, 10, drawing bar fixing bolt,11st, flat mouth screw socket.
Embodiment
A kind of specific embodiment of the invention, a kind of pedicle nail, including screw body 1, the screw are proposed as shown in Figure 1The outer surface of body 1 is provided with attaching nut 3, the end of the attaching nut 3 provided with fastening thread 2, the end of the screw body 1Portion is provided with a U-shaped drawing bar fastener 4, and the attaching nut 3 rotates groove 5 with the junction of U-shaped drawing bar fastener 4 provided with fastener,The fastener, which is rotated, is provided with fastener fixing hole 6 and attaching nut's flat mouth screw socket 7 in groove 5, as shown in Figure 2；The U-shaped tractionOffered in rod fastener 4 in a drawing bar neck 8, the drawing bar neck 8 provided with the company that can be connected with fastener fixing hole 6Fitting 9, the present embodiment sets connector 9 to be screw, as shown in figure 3, the side of drawing bar neck 9 provided with can be embedded within,And the drawing bar fastening bolt 10 in the U-shaped drawing bar fastener 4, it is flat that the end of the drawing bar fixing bolt 10 offers oneMouth screw socket 11, as shown in Figure 3.
The screw body 1 is set to integral structure with attaching nut 3, it is ensured that between screw body 1 and attaching nut 3Stable connection so that screw body is stabilized in pedicle of vertebral arch, improves security performance, be conducive to Rehabilitation.
Connection is engaged by thread between the drawing bar fastening bolt 10 and U-shaped drawing bar fastener 4, facilitates drawing barInsertion, on the one hand ensures to be prevented effectively from the secondary injury to pedicle of vertebral arch, on the other hand ensures the tightness of screw body 1.
When the present invention is used：First pass through attaching nut's flat mouth screw socket 7 pedicle nail body 1 is all fixedly mounted, soThe angle of the opening of drawing bar neck 8 is adjusted afterwards, after adjusting, by connector 9 by U-shaped drawing bar fastener 4 and attaching nut 3Drawing bar, is placed on the inside of drawing bar neck 8 by fixing-stable after fixing, drawing bar is fixed into spiral shell by flat mouth screw socket 11Bolt 10 is screwed in drawing bar neck 8, and by drawing bar fixation, realizes the fixation of screw body 1.
Certainly, simply the preferred embodiments of the disclosure is described in detail with reference to accompanying drawing above, not with thisThe practical range of the present invention is limited, the equivalence changes that all principles under this invention, construction and structure are made all should be covered by thisIn the protection domain of invention.