PeerJ (Aug 2023)

Impact of cooling on shaping ability of thermally treated files in canal models with double curvature

  • Ahmed Jamleh,
  • Hajar Albanyan,
  • Ali Alaqla,
  • Hamad Alissa,
  • Nawaf Alshetan,
  • Sulaiman Alraffa,
  • Abdulmohsen Alfadley

DOI
https://doi.org/10.7717/peerj.15830
Journal volume & issue
Vol. 11
p. e15830

Abstract

Read online Read online

Background This study compared the ability of thermally treated files in shaping simulated canals with double curvature. Fifty-six canals were enlarged to a final size of 25 with ProTaper Next (PTN) or ZenFlex (ZF). Materials Half of the samples were shaped with cooled files (n = 14 each). The amount of removed resin was measured and canal deviation was determined at eight levels. Shaping time and maximum shaping torque values were also recorded. Data were statistically analyzed using analysis of variance and LSD, Kruskal–Wallis, and chi-square tests at a 0.05 significance level. Results Compared to PTN and cooled PTN, ZF and cooled ZF required lesser time to shape the canals. The maximum torques were found comparable between the groups. All the groups generated negligible deviations at every canal level evaluated and maintained the canal geometry. Although not significant, the cooled PTN and ZF files exhibited lesser canal deviations than their counterparts. Conclusion All groups demonstrated similar shaping ability whilst maintaining the original curvature of the canal in simulated canals with double curvature. However, ZF groups were able to shape the canals faster than PTN groups. There was a trend that cooled files made lesser canal deviations compared to their counterparts.

Keywords