Locking screw for reduction of femoral neck fracture

Abstract

The utility model relates to the technical field of locking screws, and discloses a locking screw for femoral neck fracture reduction, which comprises a nut, one end of the nut is fixedly connected with a screw rod, the outer wall of the screw rod is provided with external threads, and one end of the screw rod is provided with a tip. According to the locking screw for femoral neck fracture reduction, the drug delivery channel is arranged, when the locking screw is used, needed drugs are injected through the drug delivery channel in the nut, the drugs are transmitted to the tip end through the drug delivery channel and finally released to the affected part, drug delivery to the fracture part of a patient is achieved, and the requirements of people are met; the screw cap is convenient for people to use a tool to rotate the screw cap, the threaded rod can be inserted into the threaded hole and the threaded rod is upwards lifted to pull out the screw and is convenient to take out when screw loose of the cross-shaped hole occurs, the allogeneic bone layer is arranged and can be subjected to reconstruction fusion with the cancellous bone of a patient, the screw can be prevented from loosening, and the fixing effect can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of locking screws, in particular to a locking screw for femoral neck fracture reduction. Background Technique

[0002] Femoral neck fracture refers to the fracture between the lower part of the femoral head and the base of the femoral neck; there are many surgical methods for treating femoral neck fractures clinically, and the commonly used one is reduction and internal fixation surgery.

[0003] Fracture reduction and internal fixation surgery is a common surgical method for fracture treatment, mainly applicable to cases where the fracture condition is relatively serious, such as unstable fractures or severe displacement of the fracture site, and cannot be effectively corrected by non-surgical methods; during the operation, the doctor will make a surgical incision at or near the fracture site, move the surrounding soft tissues away, so that the fracture site can be clearly shown, and then use special tools and techniques to reposition the fractured bone fragments to restore their normal position; subsequently, the doctor uses an internal fixation device, such as a metal plate, screw, steel needle or steel bar, etc., to stabilize the fracture ends together, and the screw is generally a locking screw.

[0004] The prior art patent document with the publication number CN217744561U provides a screw support structure for a locking plate. By the interlocking of the locking mother screw and the locking son screw in the locking screw hole, the support strength of the locking mother screw is increased, avoiding the deformation of the middle and distal ends of the screw caused by the vertical stress due to the longer force arm of the locking mother screw, and improving the stability of fracture fixation.

[0005] In the above-mentioned prior art, although the support strength of the locking mother screw is increased, after the fracture site is fixed by the locking screw, due to the obstruction of these objects, it is impossible to inject medicine into the fracture site, and only methods such as injection and infusion can be used. The treatment effects of injection and infusion are not as good as directly administering medicine at the fracture site, and it is impossible to administer medicine at the patient's fracture site, which cannot meet people's needs. Therefore, we need a locking screw for femoral neck fracture reduction. Content of the Utility Model

[0006] The purpose of the utility model is to provide a locking screw for femoral neck fracture reduction to solve the problems raised in the above background technique.

[0007] To solve the above technical problems, the present utility model provides the following technical solution: A locking screw for femoral neck fracture reduction, comprising a nut, one end of the nut is fixedly connected with a screw rod, and an external thread is provided on the outer wall of the screw rod. One end of the screw rod is provided with a tip. A drug delivery channel is provided inside the nut, and a threaded hole is provided on the top of the nut. A cross hole is provided inside the nut. A groove is provided on the outer wall of the screw rod, and a medical adhesive layer is provided on the inner wall of the groove. An allogeneic bone layer is adhered to the outer wall of the medical adhesive layer.

[0008] Preferably, the nut and the tip form a fixed structure through the screw rod, and the screw rod is arranged between the nut and the tip.

[0009] Preferably, the number of the grooves is two, and the two grooves are symmetrically arranged on the screw rod.

[0010] Preferably, the shape and size of the inner wall of the groove match the shape and size of the outer wall of the allogeneic bone layer, and the inner wall of the groove fits with the outer wall of the allogeneic bone layer.

[0011] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0012] By providing a drug delivery channel, during use, the required drug is injected through the drug delivery channel on the nut. The drug is transmitted through the drug delivery channel to the tip and finally released to the affected area, realizing drug delivery to the fracture site of the patient, meeting people's needs. By providing a cross hole, it is convenient for people to use tools to rotate the nut. When the cross hole slips, the threaded rod can be inserted into the threaded hole, and the threaded rod is lifted upward to pull out the screw, which is convenient for removal. By providing an allogeneic bone layer, the allogeneic bone layer can undergo reconstruction and fusion with the cancellous bone of the patient, preventing screw loosening and strengthening the fixation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the front view structural schematic diagram of the present utility model;

[0014] Figure 2 is the structural schematic diagram of the nut and the screw rod of the present utility model;

[0015] Figure 3 is the structural schematic diagram of the nut and the cross hole of the present utility model.

[0016] Wherein: 1, nut; 2, screw rod; 3, external thread; 4, tip; 5, drug delivery channel; 6, threaded hole; 7, cross hole; 8, groove; 9, medical adhesive layer; 10, allogeneic bone layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figure 1 , Figure 2 and Figure 3 , a locking screw for femoral neck fracture reduction, including a nut 1. One end of the nut 1 is fixedly connected to a screw rod 2, and an external thread 3 is provided on the outer wall of the screw rod 2. One end of the screw rod 2 is provided with a tip 4. A drug delivery channel 5 is provided inside the nut 1, and a threaded hole 6 is provided on the top of the nut 1. A cross hole 7 is provided inside the nut 1. A groove 8 is provided on the outer wall of the screw rod 2, and a medical glue layer 9 is provided on the inner wall of the groove 8. An allograft bone layer 10 is adhered to the outer wall of the medical glue layer 9.

[0019] Through the above technical solution, by providing the drug delivery channel 5, during use, the required drug is injected through the drug delivery channel 5 on the nut 1. The drug is transmitted through the drug delivery channel 5 to the tip 4 and finally released to the affected area, realizing drug delivery to the patient's fracture site and meeting people's needs. By providing the cross hole 7, it is convenient for people to use tools to rotate the nut 1. When the cross hole 7 slips, the threaded rod can be inserted into the threaded hole 6 and the threaded rod is pulled upward to pull out the screw, which is convenient for removal. By providing the allograft bone layer 10, the allograft bone layer 10 can undergo reconstruction and fusion with the patient's cancellous bone, which can prevent screw loosening and strengthen the fixation effect.

[0020] Specifically, the nut 1 and the tip 4 form a fixed structure through the screw rod 2, and the screw rod 2 is arranged between the nut 1 and the tip 4.

[0021] Through the above technical solution, the nut 1, the screw rod 2 and the tip 4 are integrally cast, which enhances the stability.

[0022] Specifically, the number of the grooves 8 is two, and the two grooves 8 are symmetrically arranged on the screw rod 2.

[0023] Through the above technical solution, by symmetrically arranging the two grooves 8, it is convenient for the installation of the two allograft bone layers 10.

[0024] Specifically, the shape and size of the inner wall of the groove 8 match the shape and size of the outer wall of the allograft bone layer 10, and the inner wall of the groove 8 is attached to the outer wall of the allograft bone layer 10.

[0025] Through the above technical solution, the connection effect between the groove 8 and the allograft bone layer 10 is enhanced, which is convenient for the installation of the allograft bone layer 10.

[0026] When in use, first, after the locking screw is installed, the allogeneic bone layer 10 is provided, so that the allogeneic bone layer 10 can be reconstructed and fused with the patient's cancellous bone, which can prevent the screw from loosening and enhance the fixation effect. When it is necessary to administer medicine to the patient's fracture, the medicine is injected into the medicine administration channel 5 by a syringe through the provided medicine administration channel 5, and the medicine is transmitted to the tip 4 through the medicine administration channel 5 and finally released to the affected part, thereby administering medicine to the patient's fracture and meeting people's needs. By providing a cross hole 7, it is convenient for people to use tools to rotate the nut 1, such as the tool Meihuati. When the cross hole 7 is slipped, a threaded rod matching the threaded hole 6 can be found, the threaded rod can be inserted into the threaded hole 6, and the threaded rod can be pulled up to pull out the screw for easy removal, thus completing all the work. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A locking screw for femoral neck fracture reduction, comprising a nut (1), characterized in that: One end of the nut (1) is fixedly connected to a screw rod (2), and an outer wall of the screw rod (2) is provided with an external thread (3), one end of the screw rod (2) is provided with a tip (4), a drug delivery channel (5) is provided inside the nut (1), a threaded hole (6) is provided at the top of the nut (1), a cross hole (7) is provided inside the nut (1), a groove (8) is provided on the outer wall of the screw rod (2), and a medical adhesive layer (9) is provided on the inner wall of the groove (8), and an allogeneic bone layer (10) is bonded to the outer wall of the medical adhesive layer (9).

2. A locking screw for femoral neck fracture reduction according to claim 1, characterized in that: The nut (1) forms a fixed structure through a screw rod (2) and a tip (4), and the screw rod (2) is arranged between the nut (1) and the tip (4).

3. A locking screw for femoral neck fracture reduction according to claim 1, characterized in that: The number of the grooves (8) is two, and the two grooves (8) are symmetrically arranged on the screw rod (2).

4. A locking screw for femoral neck fracture reduction according to claim 1, characterized in that: The shape and size of the inner wall of the groove (8) match the shape and size of the outer wall of the allogeneic bone layer (10), and the inner wall of the groove (8) fits the outer wall of the allogeneic bone layer (10).

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