Crack propagation in radicular dentin after the root canal preparation with the different NiTi rotary files an ex vivo study

Abstract

Cracks that occur during endodontic procedures can propagate by occlusal forces, with repeated stress finally resulting in VRFs. At times, we inevitably end up damaging root dentin which becomes a Gateway for infections like perforation, zipping, dentinal cracks and minute intricate fractures or even vertical root fractures, thereby resulting in failure of treatment. Several factors may be responsible for the formation of dentinal cracks like high concentration of sodium hypochlorite, compaction methods and various canal shaping methods. The prognosis of a tooth with a VRF is poor. The final apical preparation size is an important factor in root canal cleanliness. This article discusses the current concepts in the usage of NiTi rotary files in endodontic therapy and their comparison with hand files in order to draw some clinical inferences.