Methods for removing metal obstructions from the root canal

Abstract

Abstract The removal of metallic obstructions is an important part of endodontic retreatment procedures and encounters a number of serious problems. Sometimes removal procedures are extremely easy and can be performed in rather short time, but often it is a very tedious and time‐consuming operation with a high number of failures, especially with fractured instruments. Using special devices such as the Masserannkit, the Canal‐Finder‐System, or ultrasonic systems some fractured instrument cases can be managed successfully. The retreatment of dowel‐obturated root canals or failing silver cone cases has a good prognosis and a fairly good success rate. The Masserannkit, post pullers, the Canal‐Finder‐System and ultrasonic systems have been shown to be helpful devices in removal of root posts and silver cones. Additionally a large number of special devices and techniques for the removal of metal obstructions from the root canal have been described in the literature and will be critically reviewed. Copyright © 1993, Wiley Blackwell. All rights reserved