Root surface strain during canal shaping and its influence on apical microcrack development: a preliminary investigation.
Ahmed JamlehTakashi KomabayashiA EbiharaM NassarS WatanabeT YoshiokaK MiyaraH SudaPublished in: International endodontic journal (2014)
Based on these preliminary data, canal shaping appears to cause apical microcracks regardless of the type of rotary instrument motion. Contrast-enhanced micro-CT was able to identify microcracks in roots.