Evaluation of cracks associated with ultrasonic root-end preparation.

  title={Evaluation of cracks associated with ultrasonic root-end preparation.},
  author={Chris Layton and J Gordon Marshall and Laura A Morgan and John Craig Baumgartner},
  journal={Journal of endodontics},
  volume={22 4},
The purpose of this study was to evaluate the integrity of resected root-end surfaces of extracted human teeth after using ultrasonic tips at low or high frequencies for root-end preparation. Thirty bilaterally matched pairs of single-rooted human teeth had root-end resections using a low-speed diamond saw and were examined for root-end cracks. The matched pairs of teeth were then divided into two experimental groups, with one member of each pair being placed in each group. In group 1, root-end… CONTINUE READING

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