screw thread

Abstract

The invention relates to the technical field of medical instruments, and in particular relates to a thread spicule. The thread spicule comprises a fixing segment, a first support segment and a second support segment, wherein the fixing segment is connected with proximal bone cortex; and the first support segment and the second support segment are used for supporting offside bone cortex and are not equal in length. According to the scheme, the thread spicule comprises the first support segment and the second support segment which are different in length. In an actual operation, the first support segment or the second support segment with a proper length is selected to support the offside bone cortex according to the bone fracture position, so that the thread spicule can be applicable to support different bone fracture parts; the application range of the thread spicule is expanded; and the operation preparation work is simplified.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a threaded bone needle. Background technique [0002] Fracture refers to the complete or partial break of the continuity of the bone structure. As far as the reasons are concerned, there are mainly the following situations: direct violence: violence directly acts on a certain part of the bone and causes fracture of this part, often accompanied by different degrees of soft tissue damage; indirect violence Violence: Indirect violence causes distant fractures through longitudinal conduction, leverage or torsion; cumulative strain: long-term, repeated, slight direct or indirect injuries can cause fractures in a specific part of the limb, also known as fatigue fractures. [0003] The treatment of fractures generally adopts reduction and fixation. After fracture reduction, it is prone to redisplacement due to instability, so it needs to be fixed to make the fracture site he...

AI Technical Summary

Problems solved by technology

[0007] On the one hand: after complex fractures such as compression fractures and collapse fractures occur, the bone fragments into multiple pieces. If traditional bone screws are still used for connection and fixation, multiple bone screws need to be used for coordinated fixation, which makes the operation complicated and occurs. The risk of iatrogenic injury is also extremely high; and for small fragmented bone fragments, it is difficult for bone screws to penetrate in, thus failing to achieve a good connection and fixation effect;

[0008] On the other hand: for compression fractures and collapse fractures, compressed bone fragments are formed after compression fractures, and collapsed bone fragments are formed after collapse fractures. Part of it is a sharp end, which is difficult to exert pressure and maintain the compressed bone block or collapsed bone block in the direction along the axis of the bone screw, and then exert pressure on the compressed bone block or collapsed bone block in the direction along the axis of the bone screw. It is difficult for blocks to play a direct supporting role;

[0009] On the other hand: since the compressed bone or collapsed bone cannot be directly supported in the direction along the axis of the bone screw, after the bone screw is fixed, the compressed bone or collapsed bone at the sharp end of the bone screw Bone blocks are prone to bone loss and other problems, which brings great pain to patients

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