SU1049055A1 - Intraosteal fixative for treating fractures - Google Patents

Abstract

INTRACTION FIXER FOR THE TREATMENT OF FRACTURES, containing a rod with a threaded shank, a working part of the rod is made with a slot, mounted on the Vitit shank, a spring, and a thrust washer, characterized in that, in order to ensure permanent fixation of bone fragments of the hip, it is hysterectomy. and taking into account the possibility of resorption of the endosteus, the rod is made detachable from two halves, provided with inclined teeth at the connector site, and with fins on the outer surface, one floor wine rod is externally with the teeth of the clutch, and the thrust washers mounted on the sleeve and the inner side has teeth, .kontaktiruyuschie with the teeth of the coupling.

Description

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The invention relates to medical technology, in particular to devices for the osteosynthesis of long tubular bones. Known intraosseous clamp for compression osteosynthesis of bone fractures, containing a rod with a threaded shank, the working part of which is made split, screw, spring, thrust washer, while the working part of the rod is kinematically connected with the screw / Pair (.1. However, the known fixer does not provide X permanent fixation of the fragments of the long tubular bones and leads to displacement of the bone fragments. The purpose of the invention is to provide permanent fixation of the bone fragments of the long tubular bones with allowance for This configuration is achieved by the fact that, in the intraostated fixator for fracture treatment, containing a rod with a threaded shank, the working part of the rod is made with a slot, a screw mounted on the shank, a spring, stop c / ibuy, the rod is made of a connector of two halves provided with inclined teeth at the place of the connector, and with ribs on the outer surface, one half of the rod has a coupling with teeth on the outside, and a stop plate is mounted on the coupling and the inner side has teeth in contact with the teeth of the coupling. FIG. 1 shows the Lock Connector in the working position; in fig. 2 - that. same in the assembly before use; in fig. 3 - locking device in the working position, top view (without “stop washer and screw); Fig 4 - the latch assembly before use, bottom view. An intraosseous detachable retainer consists of two halves in the form of half-cores I and 2. On the outer surface they contain ribs 3, at the place of the connector there are inclined resistant-sliding teeth 4. In the lower part of the retainer the angle of inclination of the teeth 4 relative to the horizontal line is less than the middle and upper parts, which allows the lower part of the fixer to move apart conically and firmly fix the distal fragments, in which the channel has a conical shape. In the lower part of the halves 1 and 2, a recess 5 is contained to give flexibility to the ends of the fixture. In the upper part, the rod 1 passes into the sleeve 6, on which there is a thread 7 for the stabilizing screw & and a groove 9 for inserting a half-core 2, of a cylindrical shape, a recess 10 for the screw 8. On the outer surface of the coupling 6 there are teeth And on the three sides that are in contact with the teeth 12 of the washer 13. The half-core 2 in the upper 1 55 part passes into the cylindrical part 14 s a screw 15 for screw 8. The screw 8 has a longitudinal cylindrical channel with a thread 16. There is a spring 17 on the thrust washer 13. Before the fixative is inserted into the medullary canal and before cleansing from the joints, the poluster is removed. Streets 1 and 2 are connected together by a stabilizing nut 18, c. which there is a recess. 19 to grip the tool when removing the retainer and thread for half-cores 1 and 2. The retainer works as follows. For insertion of the fixator, its selection is made according to the thickness and length of the bone channel. Minor discrepancies between the diameter of the medullary canal and the diameter of the fixer are eliminated by the longitudinal reaming of the canal. Semi-holders t and 2 are connected with a special nut prior to insertion with a stabilizing nut 18. With a blow of a hammer on a stabilizing nut 18, the retainer is inserted into the proximal and then into the distal bone fragments up to the coupling 6. The nut 18 is turned off. On the clutch 6, the spring 17 and the thrust plate 13 are placed. A screw 8 is screwed onto the thread 15 of the half-core 2. When screwing the screw, the half-core 2 goes up, while the teeth 4 of the half-core 2 run onto the teeth of the half-core 1 and stretch out of their recesses, .. half rods 1 and 2 to the side to the walls of the medullary canal. The lower ends of the half-cores 1 and 2 are tapering apart and tightly pressed against the extended bone marrow canal in the distal fragment. This eliminates the longitudinal mixing of the fragments and its rotational displacement. The ribs 3 of the half-cores I and 2 are pressed into the walls of the bone channel, which enhances the adhesion stiffness c. bone and prevents the rotation of fragments. As resorption occurs under the half-cores 1 and 2, the spring 17 automatically lifts the half-core 2 up, and the spring-loaded teeth 12 of the washer 13 engages with the teeth 11 of the coupling 6, which prevents the semi-core 2 from moving backwards. Thus, an automatic uniform maintaining the force of action of the half-cores and 2 on the walls of the channel, which excludes micro-vibrations of fragments in the process of adhesion. After curing the fragments, screw off the screw 8; remove the puck 13 and the spring 17. Half-core 2 is immersed in the medullary canal. The stabilizing nut 18 is wrapped around the starting position, the threads of both half-cores 1 and 2, and the retainer is removed from the bone channel with the recess 19. The proposed fixator provides physiological conditions for fusion of bone fragments in various types of fractures: oblique, helical, transverse, comminuted. The fixator in a constant mode acts on the walls of the bone-cerebral canal - software for its entire length, taking into account the anatomy of CJ

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The bone structure of the bone canal, while ensuring reliable fixation of bone fragments.

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Claims (1)

INTRACOSTIC FASTENER FOR TREATMENT OF FRACTURES, containing a rod with a threaded shank, the working part of the rod is made with a slot. a screw, spring, thrust washer mounted on the shank, characterized in that, in order to ensure permanent fixation of bone fragments of long tubular bones, taking into account the configuration of the medullary canal and taking into account the possibility of resorption of the endosteum, the shaft is made detachable from two halves equipped with inclined teeth in place of the connector , and with ribs on the outer surface, one half of the shaft has a clutch with teeth on the outside, and a thrust washer is mounted on the clutch and has teeth on the inside that are in contact with the teeth couplings.