Enlarging characteristics of four nickel-titanium rotary instrument systems under standardized conditions of operator-related variables

Uzun O., Topuz O., Aydyn C., Alacam T., Aslan B.

JOURNAL OF ENDODONTICS, vol.33, no.9, pp.1117-1120, 2007 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 9
  • Publication Date: 2007
  • Doi Number: 10.1016/j.joen.2007.06.008
  • Title of Journal : JOURNAL OF ENDODONTICS
  • Page Numbers: pp.1117-1120


We aimed to describe a Computer-controlled testing device and evaluate the amount of material removed by using 4 Ni-Ti systems in simulated root canals. Eighty resin blocks were used. Hero 642, Hero Shaper, ProFile, and ProTaper rotary instruments were used to prepare the canals. Operator-related variables were standardized with the aforementioned device. Preoperative/ postoperative photographic: images of canals were measured at 11 levels from the apical tip. Statistical analyses were done with one-way analysis of variance, Tukey honestly significant difference, and Bonferroni tests. Significantly more material was removed by the ProTaper at 9 levels, ProFile at 6, and Hero 642 at 2 levels (P < .05); no significant difference was determined at 5 levels. Our results showed that ProTaper and ProFile removed significantly more material than Hero 642 and Hero Shaper at different levels of the curved root canals under controlled conditions of. operator-related variables.