SU1205901A1 - Arrangement for osteosynthesis - Google Patents

Description

The invention relates to medicine, namely to traumatology and orthopedics, and can be used in the treatment of fractures of tubular bones.

The purpose of the invention is to eliminate the possibility of secondary displacement of bone fragments.

FIG. 1 shows an osteosynthesis device, top view; in fig. 2 is a cross section; FIG. 3 - the same, in a perspective view, in FIG. A shows a device deformed in the cooled state; in FIG. 5 - a device for osteosynthesis in the working position, in perspective.

The device for osteosynthesis is made in the form of a bracket containing the outboard part 1, legs 2, bent one nastrech another, and the edge 3, located perpendicular to the outboard part 1, which has an extension 4 with a hole 5 in the center. The rib 3 is provided with petals 6, bent to the opposite sides, and at one end with a pointed petal 7,

Making the device for osteosynthesis from a memory forming material, for example from titanium nickelide of the ТН-10 brand, ensures the restoration of the initially specified shape of the device in the working position after pre-deformation of the legs 2, extension 4 of the bracket and lobes 6 and 7 at a temperature below + 10 ° С.,

Osteosynthesis using the proposed device is carried out as follows.

During the operation of osteosynthesis of the tubular bone, bone fragments are aligned and a groove equal to the length of the rib 3 of the device is cut in the lengthwise direction of the bone through the fracture line using a circular saw.

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The holes chosen for osteosynthesis also drill two holes (one for each bone fragment) at a distance exceeding 5-7 mm between the legs and 2 staples.

The device for osteosynthesis is irrigated with chlorostil for 5-10 s, cooling it to a temperature below + 10 ° C. Using, for example, pliers, the bulb-like expansion 4 of the bracket is compressed on both sides (due to which the outboard part 1 of the cooled bracket is lengthened by 5-7 mm), and legs 2 and petals 6 and 7 are given a shape suitable for into the bone. The device is transferred into the operative wound and into the previously sawed longitudinal groove in the bone, first, the pointed tooth 7 is inserted, and then the whole rib 3 of the bracket, and the legs 2 are inserted into the previously drilled holes in the bone fragments. After 20-30 s, in connection with the effect of shaping, attacking upon contact heating of titanium nickelide to +35 ° C, the device tends to assume a given (i.e., initial) shape. In this case, the petals 6 and the sharp lobe 7, ribs 3 of the staples are tightly wedged in the medullary canal, thereby eliminating the possibility of secondary displacement of bone fragments.

After adhesion of the fracture, the device is removed as follows.

Expose the outboard part 1 of the device, irrigate it with chloroethyl, with the help of cramping forceps squeeze out the spreading 4 of the cooled staple on both sides and remove the legs 2 from the bone and then, lifting the outboard part 1 of the device from the extension 4, edge 3.

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Editor A. Kozoriz

Compiled by L.Musso Tehred O.Netse

Order 8582/6 Circulation

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

Corrector. Pozho Subscription

Claims (1)

DEVICE FOR OSTEOSYNTHESIS, containing a bracket with legs bent one towards the other and an extension on the osseous part made of a shaping material with a memory effect, distinguished by the fact that, in order to exclude the possibility of secondary displacement of fragments, the bracket is equipped with a rib located perpendicular to the osseous parts and having petals. 1 12