Enlarging Characteristics of Four Nickel-Titanium Rotary Instrument Systems under Standardized Conditions of Operator-related Variables

UZUN Ö., TOPUZ Ö., Aydýn C., ALAÇAM 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
  • Keywords: hero 642, hero shaper, Ni-Ti rotary instruments, operator related variables, ProFile, ProTaper, strip perforation, ROOT-CANAL PREPARATION, MICRO-COMPUTED-TOMOGRAPHY, SIMULATED CURVED CANALS, NI-TI INSTRUMENTS, SHAPING ABILITY, ENDODONTIC INSTRUMENTS, ROTATIONAL SPEED, PART 1, FILES, TORQUE


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. © 2007 American Association of Endodontists.