Novel toothed screw pad assembly for cure of avulsion fracture

Abstract

The invention discloses a toothed screw assembly for a cure of an avulsion fracture. The toothed screw assembly comprises a screw pad, a locating screw and a locking screw. The top of the screw pad is provided with a locating hole. The bottom of the screw pad is provided with a plurality of clamping teeth and a fixing arm. According to the toothed screw assembly for the cure of the avulsion fracture, the screw pad, the clamping teeth and the fixing arm form a shape which is similar to the external shape of a fracture bone so that an injured part is well protected; being a thin screw, the locating screw can play a locating role and can not hurt the avulsion bone; being coarse threads, the threads on the head part of the locking thread can firmly claw the whole body of the assembly in the position of the injured part; and the locating screw and the locking screw are in fit connection with the screw pad and the fixing arm through threads so that phenomena of looseness of the screws can not happen after long-time utilization.

Description

technical field [0001] The invention relates to a screw pad assembly, in particular to a novel toothed screw pad assembly for treating avulsion fractures, and belongs to the technical field of avulsion fracture fixation assemblies. Background technique [0002] Clinically, avulsion fractures of ligaments or joint capsules and fractures around bone plaques in children are often encountered. Characteristics of avulsion fracture: the fracture fragment is small and thin, with important tissues such as joint capsule or ligament attached, and the pulling force is large, and the fracture fragment is easy to burst when fixed, making it difficult to fix; the characteristics of fracture around the bone in children: the fracture end is close to or spread to the bone, Coarse internal fixation objects are easy to damage the bone fecal matter, resulting in abnormal development; recently, the commonly used internal fixation materials for the clinical treatment of avulsion fractures and chi...

AI Technical Summary

Problems solved by technology

Characteristics of avulsion fracture: the fracture fragment is small and thin, with important tissues such as joint capsule or ligament attached, and the pulling force is large, and the fracture fragment is easy to burst when fixed, making it difficult to fix; the characteristics of fracture around the bone in children: the fracture end is close to or spread to the bone, Coarse internal fixation objects are easy to damage the bone fecal matter, resulting in abnormal development; recently, the commonly used internal fixation materials for the clinical treatment of avulsion fractures and children's periosteum fractures include: screws, Kirschner wires, and steel wires; Its diameter is large, and it is easy to cause the fracture block to burst when fixing the avulsion fracture and the fixation fails; when fixing the fracture around the bone scale, it is easy to damage the bone scale, resulting in abnormal development of the local bone scale; Easy needle withdrawal and low fixation strength often lead to fixation failure. The end of the withdrawn Kirschner wire irritates the local soft tissue and even punctures the skin causing infection; and the steel wire often causes the fracture end to redisplace due to the low fixation strength; another example is the authorization number The patent document of CN202086564U discloses a sub-female screw; the sub-female screw fixes the avulsion fracture site through the cooperation of the sub-screw and the female screw, but after the injured part is healed by this fixing method, the female screw will not be able to Take it out and leave it in the human bone, which will pose a hidden danger to the patient's health

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