Michael presented this case earlier in a German newsgroup. When he assessed the case, he thought the big fragment should be retrievable, for the second he should have a chance, and the little thing he considered impossible. So this was planned to be a case todemonstrate you can do successful endo when you leave an instrument and make it part of the obturation. Then it turned out different. The first two could be removed the traditional way by ultrasonics, then he tried to bypass the little fragment with a prebent 06 file, hoping he might be able to get by. He found he could move the
instrument around it and loosen it. Finally he was able to rinse it out
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