Hollow screw structure and usage thereof

Abstract

The invention provides a hollow screw structure, comprising a hollow screw body, an injector and a seal nut, and also provides usage of the hollow screw structure. The hollow screw structure is firmly fixed by engaging an external thread at the far end of the injector with an internal thread at the near end of the hollow screw with threaded lateral gap, after being injected, injectable solidifying material such as bone cement may be discharged evenly out of the screw from the threaded lateral gap and top opening of the hollow screw and fill a fixed object around, holding power of the screw may be increased, fixing strength can be improved, local fixing environment can be improved, and postoperative complications are decreased. After being engaged, the rear thread can prevent the injected liquid from overflowing from the rear, injection quantity control is facilitated, a bone cement sheath formed by a forward travel threaded lateral gap can prevent the screw from loosening and retreating, the hollow structure of the screw is helpful for in-position positioning of a fine pin before the screw is tightened in by directly sleeving on the fine pin, and operation is facilitated.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a hollow screw structure and a method for using the same. Background technique [0002] At present, in the clinical treatment of fractures, plate screws or screws alone are mostly used for fixation. In the treatment of femoral neck fractures and vertebral compression fractures, bone screws or pedicle screws are often used for treatment. For patients with normal bone quality, it can provide relatively strong fixation strength, but for osteoporosis and other bone quality declines caused by metabolic diseases, nutritional disorders, etc., when the bone density is reduced, ordinary screw fixation cannot achieve satisfactory results. fixed effect. Due to decreased bone mass and increased fragility in patients, ordinary screws cannot effectively hold a sufficient number of bone trabeculae to maintain the fixation strength, so complications such as screw withdrawal,...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned problem that the existing bone screws cannot achieve effective fixation strength when fixing patients with poor bone quality, the present invention provides a hollow screw structure and its use method. The hollow screw structure includes a hollow screw with a helical side seam and a distal A syringe with an external thread on the end, using this hollow screw with a helical side slit and a syringe, after the screw reaches its intended fixed position, the syringe can be used to inject injectable curing materials such as bone cement into the screw, through the helical side slit and Spills in nailhead holes for enhanced hold when cured

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