Inner fixing screw extractor in orthopedics department

A technology for fixing screws and extractors, applied in the direction of fixators, etc., can solve the problems of soft tissue damage, breakage of reverse threaded drills, failure to occur, etc., and achieve the effects of good anti-shedding performance, enhanced occlusal force, and low cost.

Inactive Publication Date: 2017-10-13
武永刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 succes

Method used

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  • Inner fixing screw extractor in orthopedics department
  • Inner fixing screw extractor in orthopedics department
  • Inner fixing screw extractor in orthopedics department

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment one, such as figure 1 As shown in -3, the orthopedic internal fixation screw extractor of the present invention is a hexagonal (or six-pointed star) outer hexagonal (or hexagonal star) at the lower part and a cylindrical wrench at the upper part, which are made of tool steel and are made of tool steel with the same thickness (or thicker above the lower end) on the left and right. Cylinder, the upper end buckle is equipped with upper end cap 3 (or mutually hinged); the right flap of the outer hexagonal (or hexagonal star) wrench cylinder The lower part of the wrench cylinder 1 is fixed with a side extension handle 4 for rotation and force, and the right flap is The clockwise rear inner end surface of the lower end of the wrench cylinder 1 is equipped with a spring 5 for outwardly pressing the opposite inner end surface of the lower end of the left flap wrench cylinder 2 . Described spring comprises all springs such as helical spring, shrapnel type spring, elas...

Embodiment 2

[0024] Embodiment two, such as Figure 4 As shown, the difference between the orthopedic internal fixation screw extractor of the present invention and the first embodiment is that the upper and lower ends of the left and right flaps of the wrench cylinder are simultaneously thickened into a circle, and the side extension handle 4 is fixedly mounted on the thickened lower portion of the right flap.

Embodiment 3

[0025] Embodiment three, such as Figure 5 As shown, the difference between the orthopedic internal fixation screw extractor of the present invention and Embodiment 1 is that the wrench cylinder is only fixed on the lower end of the right lobe of the side extension handle 4 and is thickened, and the side extension handle 4 is fixed on the thickened lower part of the right lobe. It can also be: the lower ends of the left and right petals of the wrench cylinder are symmetrical two petals that are evenly divided on the left and right, the large part of the thickened part is the right petal with a handle, and a small part of the thickened part is the left petal. About 2 / 3 of the area of ​​the thickened part is the right lobe with handle, and about 1 / 3 of the area of ​​the thickened part is the left lobe.

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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...

Claims

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Application Information

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IPC IPC(8): A61B17/92
CPCA61B17/92
Inventor 武永刚张晋姜春岩
Owner 武永刚
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