CN213129826U

CN213129826U - Hollow locking screw capable of being threaded

Info

Publication number: CN213129826U
Application number: CN202020853890.1U
Authority: CN
Inventors: 马会旭; 许泽翔; 李明晋; 隆晓涛; 王炜
Original assignee: Chongqing General Hospital
Current assignee: Chongqing General Hospital
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-05-07
Anticipated expiration: 2030-05-20

Abstract

The utility model discloses a hollow locking screw with a thread, which comprises a screw head part and a rod part; the tendon is fixed on the hollow locking screw through the tendon suture line, the hollow locking screw is locked and fixed through the screw thread of the nail head and the reverse screw thread of the steel plate, the locking screw can be stable in angulation, the locking screw and the steel plate are combined into a whole, and the anti-pull-out force of the screw is effectively increased. Meanwhile, the tendon fracture block is sutured, tension-reduced and fixed through the technical notch on the nail head and the band line which can be freely pulled, the advantages of the tension band fixation are brought into consideration, meanwhile, the firm and stable fixation of the fracture can be effectively achieved, and the loosening and the fracture of the internal fixation are avoided.

Description

Hollow locking screw capable of being threaded

Technical Field

The utility model relates to the technical field of medical appliances, concretely relates to hollow locking screw of area line.

Background

The bone tendon is combined into a special part with a complex tissue structure, the function of the special part is to conduct force between bones and muscles, and the stress concentration can be effectively reduced, and the elastic modulus between the tendon and the bone tissue can be balanced. Fracture of the tendon-bone combination part often causes tendon attachment points to be reduced, which causes poor healing of the tendon-bone, and early activity function exercise often causes tendon-bone separation to cause joint dysfunction. For fractures involving the joint of the tendon and bone, such as proximal humerus fracture and patella lower pole, the internal fixation for fracture reduction needs to suture and fix the tendon on the fracture block or the internal fixation device, so as to prevent the tendon from pulling the fracture block to shift and even loose the internal fixation. At present, the commonly used fixing method for the avulsion fracture involving the aponeurosis combining part is that an anchor, a hollow lag screw or a steel plate screw are fixed internally; however, the above structure has major problems: 1. the anchor with the thread only fixes the fracture block after the tendon is sutured, so that the fracture block drifts under the suture, a plurality of anchors are often needed to be fixed in a row mode, and the suture knots are more. Meanwhile, the anchor with the wire cannot be combined with the fixing device in the steel plate for fixing the fracture block into a whole for strengthening and fixing, and the fixing failure caused by the pulling-out and loosening of the anchor is easy to occur. 2. The locking steel plate only carries out angle stabilization on the fracture through the directional locking of the screw and the steel plate thread, and can not carry out tension-reducing suture fixation on the torn fracture block in combination with the suture line

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a can take hollow locking screw of line to improve fixed firm degree, reduced the risk of aversion.

The utility model provides a hollow locking screw with a thread, which comprises a screw head part and a rod part; one end of the rod part is connected to the nail head part, the other end of the rod part freely extends out, a quincunx sunk groove is machined on the top surface of the nail head part, threads are machined on one ring of the periphery of the nail head part, two symmetrical process notches are further machined on the nail head part along the extension direction of the rod part respectively, a pull wire hole is machined transversely of the nail head part and is located in the process notch, the pull wire hole is located below the sunk groove, threads are machined on the rod part, and the end of the free extending end of the rod part is machined to be of a sharp-pointed structure.

Preferably, the process gap centre line coincides with the centre line of the head.

Preferably, the intersection of the pull wire hole and the process notch is a smooth cambered surface.

The beneficial effects of the utility model are embodied in: the tendon is fixed on the hollow locking screw through the tendon suture line, the hollow locking screw is locked and fixed through the screw thread of the nail head and the reverse screw thread of the steel plate, the locking screw can be stable in angulation, the locking screw and the steel plate are combined into a whole, and the anti-pull-out force of the screw is effectively increased. Meanwhile, the tendon fracture block is sutured, tension-reduced and fixed through the technical notch on the nail head and the band line which can be freely pulled, the advantages of the tension band fixation are brought into consideration, meanwhile, the firm and stable fixation of the fracture can be effectively achieved, and the loosening and the fracture of the internal fixation are avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a perspective structural view of an embodiment of the present invention;

fig. 2 is a top view of the present invention fixed on the fixing plate.

In the attached drawings, a nail head part 1, a rod part 2, a pull wire hole 3, a sink groove 4 and a process notch 5.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

As shown in fig. 1-2, a hollow locking screw capable of being threaded comprises a head part 1 and a rod part 2; one end of the rod part 2 is connected to the nail head part 1, the other end of the rod part 2 freely extends out, a quincunx sunk groove 4 is processed on the top surface of the nail head part 1, a circle of the periphery of the nail head part 1 is processed with threads, two symmetrical process notches 5 are respectively processed on the nail head part 1 along the extension direction of the rod part 2, a pull wire hole 3 is processed across the nail head part 1, the pull wire hole 3 is positioned in the process notch 5, the pull wire hole 3 is positioned below the sunk groove 4, the rod part 2 is processed with threads, the end of the freely extending end of the rod part 2 is processed into a sharp structure, the threads on the rod part 2 are full threads or half threads and can be selected according to actual conditions, the quincunx sunk groove 4 on the nail head part 1 enables the torsion to be larger when a locking screw is screwed in, the pull wire hole 3 and the process notch 5 enable the nail head part 1 to freely operate when the steel plate, the stability of the fixation and the strength of the fixation are improved by further fixation through the operation of the sealing line, and the thread of the rod part 2 and the sharp-shaped structure of the rod part 2 are consistent with the structure of the self-tapping bolt.

Preferably, the center line of the process gap 5 is coincident with the center line of the nail head 1; the process gap 5 is positioned on the symmetrical center of the nail head 1, so that the stress of the bone screw and the stress condition of the whole sealing line are more stable when the sealing line is used for auxiliary fixation.

Preferably, the intersection of the pull-string hole 3 and the technical notch 5 is a smooth cambered surface, so that the suture cannot be cut when being pulled out through the pull-string hole 3.

The operation process is as follows: the area needing fixing is determined, the locking bone screw is screwed into the fixing plate after the fixing plate is implanted to be fastened with the fixing plate, and then the locking bone screw is pressed through the suture line, so that the subsequent displacement of a patient in the moving process is prevented.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. A hollow locking screw capable of being threaded is characterized in that: comprises a nail head part and a rod part; one end of the rod part is connected to the nail head part, the other end of the rod part freely extends out, a quincunx sunk groove is machined on the top surface of the nail head part, threads are machined on one ring of the periphery of the nail head part, two symmetrical process notches are further machined on the nail head part along the extension direction of the rod part respectively, a pull wire hole is machined transversely of the nail head part and is located in the process notch, the pull wire hole is located below the sunk groove, threads are machined on the rod part, and the end of the free extending end of the rod part is machined to be of a sharp-pointed structure.

2. A cannulated locking screw with thread according to claim 1, wherein: the center line of the process notch is superposed with the center line of the nail head.

3. A cannulated locking screw with thread according to claim 1, wherein: the intersection of the pull wire hole and the process notch is a smooth cambered surface.