CN2134845Y - X-shape self-pressing bone fracture device of marmen - Google Patents

Abstract

A self-pressing bone fracture device for fracture open resetting internal fixation, which is designed according to the performance that nickle-titanium memory alloy generates a shape memory change following a temperature change. A fixing branch is of an X shape. Four fixing feet are divided into two groups which are mutually opposite. The fixing feet and the plane of the fixing branch form an included angle over 0 DEG, which is used for a fracture open resetting internal fixation. The utility model can generate a continuous self-pressing fixing function to a fracture end and also has the functions of rotation resistance and shearing resistance.

Description

X-shape self-pressing bone fracture device of marmen

This utility model relates to medical fracture open reduction internal fixation, is the shape memory X type bone fracture device that pressurizes automatically.

Traditional fracture open reduction internal fixation, steel plate, the compression steel plate screws of adopting are implemented more, stop because of it produces stress, osteoporosis decalcification, fracture end absorb, form spacing or fixing reason such as unreliable, and complication such as bone does not connect connects, bone delay in healing often take place.Long diaphysis two ends juxta-articular fracture because it has exceeded the scope of application of steel plate, screw, and becomes the difficult problem of fracture open reduction internal fixation.Nineteen eighty-three, Dai Ke Shu Shi report, the pressurization pressed nail that adopts niti-shaped memorial alloy to make, " the arc memory pressurize automatically bone fracture device " of nineteen ninety Zhang Chuncai development waits treatment to fracture, avoided internal fixation that the stress of fracture end is stopped, directly fracture end is produced pressurization fixation automatically, clinical practice has obtained better therapeutic effect.But because of its anti-rotation, shearing resistance poor, fixing after, fracture end still can rotate displacement, or fixedly slippage, causes fixing failure.

This utility model designs a kind of internal fixation device, should possess the reliable automatically pressurization fixation of fracture end, have again simultaneously anti-ly revolve, the shearing resistance effect, could be that good healing condition is created in the fixing back of the reduction of the fracture like this.Based on this, design and implementation of the present utility model has satisfied these requirements substantially.

This utility model is achieved in that fixing branch is " X " type, and its angle respectively is 90 °, and four fixing feet are relative in twos, forms＞0 ° of angle with fixing branch plane, and whole device is a metal integral (Fig. 1).Behind the fracture open reduction, bone fracture device is put in 0～5 ° of brine ice of what.With distortion pincers (with supporting apparatus of this device or common needle-nose pliers) the fixing branch of X type left and right sides vertical angles are extended to 95～100 °, the plane included angle of four fixing feet and fixing branch is extended to 90 ° (Fig. 2)., in the boring of fracture line both sides four fixing feet of holder are gone into to insert in the corresponding hole by four fixing feet distances after the distortion, embedding is real.With the hot compress of warm saline gauze, local temperature is raise, the bone fracture device shape is recovered, and enters duty.Four fixing feet embed the bone fracture devices in the sclerotin, cross over fracture line, and are stressed inside and outside 4, reach fixing effectively and reliably, and You Yiqi is independent special anti-ly to be revolved, the shearing resistance effect, and demonstrates superiority.The recovery pressure that produces behind the bone fracture device rewarming has fracture end generation Pressure stimulation that continue, that meet biomechanics, can avoid absorbing spacing and produce, and promotes callus formation, reaches the purpose of accelerating union of bone fracture.

Below in conjunction with accompanying drawing this utility model is further specified.

Fig. 1 is a structural representation.

Fig. 2 is to use structure graph.

Fig. 3 is to use state diagram.

Among the figure, 1, fixing branch 2, fixing feet

Claims (2)

1, a kind of type shape memory X type bone fracture device that pressurizes automatically is characterized in that:

Fixing branch is " X " type, and four fixing feet are relative in twos, with＞0 ° of angle of plane formation of fixing branch.

2, automatic pressurization bone fracture device according to claim 1 is characterized in that integral material adopts niti-shaped memorial alloy.

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