CN102512237A - Mounting structure for growth sliding vertebral pedicle screws - Google Patents

Abstract

The invention discloses a mounting structure for growth sliding vertebral pedicle screws. The mounting structure comprises a nail body and a nail tail, wherein the nail body is connected with the nail tail. The mounting structure is characterized in that a side open hole is formed in the nail tail; and a connecting rod is inserted into the side open hole and is in sliding fit with the nail tail. The mounting structure is designed specially aiming at minors, and can be suitable for the development of the minors well.

Description

Growth slip pedicle screw mounting structure

Technical field

The present invention relates to a kind of growth slip pedicle screw mounting structure.

Background technology

Pedicle screw is more common in operation on vertebra, its effect be two or more vertebras are connected fixing, to vertebra patient's vertebra play fixing, recover height, effect such as orthopedic.

Present pedicle screw mainly is that after installation, a plurality of pedicle screws and pitman are completely fixed to adult's design; Distance between the pedicle screw also is completely fixed, and for the minor, its vertebra can with advancing age and constantly be grown; For the mounting structure of existing pedicle screw; Can't adapt to the minor, even can impact, need to do further to improve pupillary growth.

Summary of the invention

The objective of the invention is to overcome the defective of prior art, a kind of growth slip pedicle screw mounting structure is provided, the present invention is directed to the minor and carry out specialized designs, can better be suitable for pupillary developmental state.

Its technical scheme is following.

A kind of growth slip pedicle screw mounting structure comprises nail body and nail tail, and the nail body is connected on the nail tail, it is characterized in that, is provided with STH at nail on the tail, and in the perforate of pitman inserting side, pitman is slidingly matched with following closely to form between the tail.

Below the further technical scheme of the present invention is described.

Also include sleeve, this sleeve is located in the STH, in sleeve, is provided with excellent hole, and said pitman passes excellent hole, between pitman and sleeve, has the gap and form to be slidingly matched.

Outer surface at said nail body is provided with screw thread.

On said nail tail, be provided with and lift the hole, be provided with to carry in the said telescopic outside and move back the side mouth.

Said nail body flexibly connects with the nail tail.

The tail end that on said nail tail, reaches said nail body is equipped with axis hole, and rotating shaft after passing axis hole flexibly connects said nail body and nail tail.

Facing advantage of the present invention or principle down describes:

1, for the minor, owing to the variation of its vertebra along with growth promoter, its vertebral body, disc height are not also stopping variation.After this cervical arc root screw internal fixing system installation, pedicle screw can slide with respect to pitman, to satisfy the needs of its growth promoter, avoids then minor vertebra growth is impacted;

2, because the required precision of nail tail and pitman mating part is higher; So the nail tail adopts split-type structural; And material is preferably adopted in the sleeve part, and through high-precision processing, to satisfy itself and the needs that cooperate of pitman; And other part adopts common material and general machining accuracy, better economical with materials cost and processing cost;

3, flexibly connect through rotating shaft between nail body and the nail tail, follow closely body and follow closely between the tail and can swing, and left and right directions can not be swung, and helps inserting in the operation process pitman at fore-and-aft direction, and with the physiological characteristics of better adaptation vertebra.

Description of drawings

Fig. 1 is the partial sectional view of first direction of the said growth slip of embodiment of the invention pedicle screw mounting structure;

Fig. 2 is the side view of second direction of the said growth slip of embodiment of the invention pedicle screw mounting structure;

Description of reference numerals:

1, nail body, 2, the nail tail, 3, pitman, 4, sleeve, 5, screw thread, 6, rotating shaft, 7, lift mouth, 8, carry and move back the side mouth.

The specific embodiment

Be elaborated in the face of embodiments of the invention down.

Like Fig. 1, shown in Figure 2, a kind of growth slip pedicle screw mounting structure comprisesnail body 1 andnail tail 2;Nail body 1 is connected on thenail tail 2, it is characterized in that, onnail tail 2, is provided with STH; In the pitman 3 inserting side perforates, pitman 3 and nail form between thetail 2 and are slidingly matched.

Wherein, also includesleeve 4, thissleeve 4 is located in the STH, insleeve 4, is provided with excellent hole, and said pitman 3 passes excellent hole, between pitman 3 andsleeve 4, has the gap and form to be slidingly matched.Outer surface at saidnail body 1 is provided with screw thread 5.On saidnail tail 2, be provided with and lifthole 7, be provided with in the outside of saidsleeve 4 to carry and move back side mouth 8.

The tail end that on saidnail tail 2, reaches saidnail body 1 is equipped with axis hole, and rotatingshaft 6 after passing axis hole flexibly connects saidnail body 1 andnail tail 2.

Present embodiment has following advantage:

1, for the minor, owing to the variation of its vertebra along with growth promoter, its vertebral body, disc height are not also stopping variation.After this cervical arc root screw internal fixing system installation, pedicle screw can slide with respect to pitman 3, to satisfy the needs of its growth promoter, avoids then minor vertebra growth is impacted;

2, becausenail tail 2 is higher with the required precision of pitman 3 mating parts; Sonail tail 2 adopts split-type structural; Andsleeve 4 parts adopt material preferably, and through high-precision processing, to satisfy itself and the needs that cooperate of pitman 3; And other part adopts common material and general machining accuracy, better economical with materials cost and processing cost;

3, flexibly connect through rotatingshaft 6 betweennail body 1 and thenail tail 2, follow closelybody 1 and follow closely between thetail 2 and can swing, and left and right directions can not be swung, and helps inserting in the operation process pitman 3 at fore-and-aft direction, and with the physiological characteristics of better adaptation vertebra.

More than be merely specific embodiment of the present invention, do not limit protection scope of the present invention with this; Any replacement and the improvement on the basis of not violating the present invention's design, done all belong to protection scope of the present invention.

Claims (6)

1. a growth slip pedicle screw mounting structure is characterized in that, comprises nail body and nail tail, and the nail body is connected on the nail tail, it is characterized in that, on the nail tail, is provided with STH, and in the perforate of pitman inserting side, pitman is slidingly matched with following closely to form between the tail.

2. the slip pedicle screw mounting structure of growing according to claim 1 is characterized in that, also includes sleeve; This sleeve is located in the STH; In sleeve, be provided with excellent hole, said pitman passes excellent hole, between pitman and sleeve, has the gap and form to be slidingly matched.

3. the slip pedicle screw mounting structure of growing according to claim 1 is characterized in that, is provided with screw thread at the outer surface of said nail body.

4. like the said growth slip of claim 2 pedicle screw mounting structure, it is characterized in that, on said nail tail, be provided with and lift the hole, be provided with to carry in the said telescopic outside and move back the side mouth.

5. like each said growth slip pedicle screw mounting structure in the claim 1 to 4, it is characterized in that said nail body flexibly connects with the nail tail.

6. like the said growth slip of claim 5 pedicle screw mounting structure, it is characterized in that the tail end that on said nail tail, reaches said nail body is equipped with axis hole, rotating shaft after passing axis hole flexibly connects said nail body and nail tail.

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