Inner fixing screw extractor in orthopedics department

Abstract

The invention relates to an inner fixing screw extractor in the orthopedics department. In order to solve the problem that inner fixing screw is difficult to extract in the orthopedics department, tool steel is manufactured into an outer hexagonal prism or hexagram spanner cylinder composed of a left pedal and a right pedal, the upper portion and the lower portion of the cylinder are equal in thickness, or the portion above the lower end is thickened, the upper end of the cylinder is buckled by an upper end cap, or the upper end cap is hinged to the upper end of the cylinder; a sideway stretching handle for rotationally applying force is fixedly installed at the lower portion of the right pedal of the outer hexagonal prism or hexagram spanner cylinder, and a spring for outwards extruding the left pedal of the lower end of the outer hexagonal prism or hexagram spanner cylinder to face the inner end face is installed on the rear inner end face of the lower end of the right pedal of the spanner cylinder in the clockwise direction. Convex teeth obliquely stretching in the anticlockwise direction are manufactured on the periphery of the lower end of the outer hexagonal prism or hexagram spanner cylinder composed of the left pedal and the right pedal. The inner fixing screw extractor has the advantages of being capable of remarkably increasing occlusal force, simple, easy to use, high in anti-slipping performance, low in cost, high in safety, not prone to thread slipping and particularly suitable for extracting a slipping screw, and metal debris and heat are not generated.

Description

technical field [0001] The invention relates to an orthopedic internal fixation screw extractor, in particular to an orthopedic internal fixation screw extractor. Background technique [0002] It is very common to fix fractures with plates and screws in trauma orthopedics. Most of the plates and screws need to be taken out after the fracture heals. During the process of taking out, the screws often slip and buckle, especially in recent years when titanium alloy plates and titanium alloy screws appear. It is more common and is a very difficult problem for orthopedic surgeons. In the case of screw slippage, the current common method is to use a tungsten steel drill to deepen the end cap of the screw, use a tapered reverse thread drill, connect it to the T handle or an electric drill, squeeze the screw longitudinally with force, and rotate it in the opposite direction, so that The tapered anti-thread drill and the screw are "locked". Sometimes the screw can be successfully rem...

AI Technical Summary

Problems solved by technology

In the case of screw slippage, the current common method is to use a tungsten steel drill to deepen the end cap of the screw, use a tapered reverse thread drill, connect it to the T handle or an electric drill, squeeze the screw longitudinally with force, and rotate it in the opposite direction, so that The tapered anti-thread drill and the screw "lock" and sometimes the screw can be successfully removed, but sometimes the "lock" cannot occur, and sometimes the anti-thread drill suddenly breaks after the sudden "lock"

Another is to use a steel saw to cut off the steel plate to expose the screw end cap, and then find a way to unscrew the screw, but using a steel saw will generate a lot of metal debris, high temperature, it is easy to cause soft tissue damage, and even refracture

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