Comparison of Hero 642 and K3 rotary nickel‑titanium files in curved canals of molars and a systematic review of the literature

  • Authors:
    • Hua‑Xiong Cai
    • Hui‑Ling Cheng
    • Jie‑Wen Song
    • Su‑Ya Chen
  • View Affiliations

  • Published online on: July 18, 2014     https://doi.org/10.3892/etm.2014.1853
  • Pages: 1047-1054
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Abstract

The aim of the present study was to compare the root canal preparation ability of rotary nickel‑titanium (NiTi) Hero 642 and K3 files in curved mandibular or maxillary molars. A total of 40 extracted mandibular molars with two separate mesial canals, an apical width of approximately size ≤15 and a root canal curvature of 15‑30˚ were randomly divided into two groups and instrumented using Hero 642 (n=20) or K3 files (n=20). Canal straightening, working length, transportation, cross‑sectional area, minimum dentin thickness and the canal angle curvature degree were examined, and a systematic review of the literature was conducted. No statistically significant differences were observed between the two groups with regard to the mean degree of straightening, mean change in working length, mean transportation, amount of dentin removed or remaining minimum dentin thickness (P>0.05). The canal angle curvature decreased in the two groups postoperatively. The systematic review identified six studies, and overall the two files performed similarly in the majority of categories examined. Therefore, the rotary NiTi Hero 642 and K3 files demonstrated comparable shaping abilities and maintenance of working length.

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October 2014
Volume 8 Issue 4

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Spandidos Publications style
Cai HX, Cheng HL, Song JW and Chen SY: Comparison of Hero 642 and K3 rotary nickel‑titanium files in curved canals of molars and a systematic review of the literature. Exp Ther Med 8: 1047-1054, 2014.
APA
Cai, H., Cheng, H., Song, J., & Chen, S. (2014). Comparison of Hero 642 and K3 rotary nickel‑titanium files in curved canals of molars and a systematic review of the literature. Experimental and Therapeutic Medicine, 8, 1047-1054. https://doi.org/10.3892/etm.2014.1853
MLA
Cai, H., Cheng, H., Song, J., Chen, S."Comparison of Hero 642 and K3 rotary nickel‑titanium files in curved canals of molars and a systematic review of the literature". Experimental and Therapeutic Medicine 8.4 (2014): 1047-1054.
Chicago
Cai, H., Cheng, H., Song, J., Chen, S."Comparison of Hero 642 and K3 rotary nickel‑titanium files in curved canals of molars and a systematic review of the literature". Experimental and Therapeutic Medicine 8, no. 4 (2014): 1047-1054. https://doi.org/10.3892/etm.2014.1853