Self-tapping trip bolt and its application

Abstract

The invention discloses a self-taped plate-winding bolt and an application thereof. The bolt comprises a self-taped bolt tip, a partially hollow bolt body part and a steel-plate winding tail end provided with a smooth waist-shaped hole, wherein the interior of the self-taped plate-winding bolt is provided with a channel for a steel wine / French tack to pass through; a groove area of the tip end of the self-taped bolt is provided with a first through hole with smooth corners communicated with the channel inside the body part; a winding plate is provided with a second through hole communicated with the channel inside the body part; the first through hole and the second through hole are all belong to circular holes with smooth inlets and outlets or waist-shaped holes; the inner wall of the whole channel is smooth and complete. The self-taped plate-winding bolt has the advantages of preventing the steel wire / French tack from being fractured because of wearing and flection of tip after passing through the channel, and thereby prolonging the service life of the steel wire, enhancing the soundness and durability of an inner fixation system, and sufficiently reaching to enough healing time for internal fixed protective tissue in clinic; since the tip of the self-taped bolt is of a self-taped design, and a two-zone thread is designed on a screw rod, the bolt can be better embedded into the human bone, and a great fixing effect is obtained on the bone, so that it is ensured that the bolt can not be loosened and lose the fixing effect.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a self-tapping tripping screw and an application thereof. Background technique [0002] When the existing comminuted fracture of the lower pole of the patella undergoes patellar ligament exclusion surgery, the protection method of the knee extension device is to use a steel wire rope to pass through the ordinary hollow screw and tighten it to fix and protect the fracture and the corresponding accessory structures under pressure. However, this method makes The two ends of the steel wire and the screw are subjected to sharp turning and cutting less than 90°, and the early wear and tear of the steel wire, fatigue and fracture, the withdrawal of the screw, the stimulation / puncture of the skin by the broken end of the steel wire, affect the fracture healing and the early functional exercise of the patient's knee joint, and the clinical rehabilitation effect In severe cases, clinical saf...

AI Technical Summary

Problems solved by technology

[0002] When the existing comminuted fracture of the lower pole of the patella undergoes patellar ligament exclusion surgery, the protection method of the knee extension device is to use a steel wire rope to pass through the ordinary hollow screw and tighten it to fix and protect the fracture and the corresponding accessory structures under pressure. However, this method makes The two ends of the steel wire and the screw are subjected to sharp turning and cutting less than 90°, and the early wear and tear of the steel wire, fatigue and fracture, the withdrawal of the screw, the stimulation / puncture of the skin by the broken end of the steel wire, affect the fracture healing and the early functional exercise of the patient's knee joint, and the clinical rehabilitation effect In severe cases, it may cause clinical safety issues such as medical disputes

Images