Failure mechanism of Hedstroem endodontic files in vivo.

  title={Failure mechanism of Hedstroem endodontic files in vivo.},
  author={Spiros Zinelis and John Margelos},
  journal={Journal of endodontics},
  volume={28 6},
Intracanal fracture of endodontic Hedstroem files (H-files) jeopardizes the outcome of endodontic therapy. The aim of this study was to evaluate the fracture mechanism of H-files after multiple in vivo uses. Five each of size #20 and #25 ISO H-files fractured during clinical use were collected from different dental clinics. Four fractured files of each size and three unused files of each corresponding size were embedded in a resin along their longitudinal axis and after metallographic grinding… CONTINUE READING