SMEAR LAYER REDUCTION IN ROOT CANALS PREPARED WITH TRIANGULAR AND RECTANGULAR FILES AS EVALUATED BY SCANNING ELECTRON MICROSCOPY

  • MEITA HERISA Conservative Dentistry Residency Program, Faculty of Dentistry, Universitas Indonesia, Indonesia
  • NONI MAHARANI Conservative Dentistry Residency Program, Faculty of Dentistry, Universitas Indonesia, Indonesia
  • RATNA MEIDYAWATI Department of Conservative Dentistry, Faculty of Dentistry, Universitas Indonesia, Indonesia.
  • DEWA AYU NYOMAN PUTRI ARTININGSIH Department of Conservative Dentistry, Faculty of Dentistry, Universitas Indonesia, Indonesia.
  • KAMIZAR NAZAR Department of Conservative Dentistry, Faculty of Dentistry, Universitas Indonesia, Indonesia

Abstract

Objective: Root canal preparation procedures can produce a smear layer when in contact with the root canal wall, which can result in treatment
failure. As such, the cross-section shape of the file may influence the production of smear layer. In this study, we compared the smear layer production
at the apical third of the root canal wall between files with a triangular or rectangular cross-section shape.
Methods: Thirty-two human premolar samples taken from mandibles were divided into two groups whose root canals were prepared using files
with either a triangular (One Curve®, n=16) or rectangular (Hyflex EDM®, n=16) cross-section shape. After preparation, the root canals were irrigated
with a combination of 2.5% NaOCl and 17% ethylenediaminetetraacetic acid (EDTA). The smear layers in the apical third of the root canal walls were
observed using a scanning electron microscope and quantified according to the Foschi scoring system.
Results: The Mann–Whitney U-test revealed a significant difference between root canal preparations using the different file shapes. The group
prepared with the triangular file produced lower smear layer scores compared with the group prepared with the rectangular file.
Conclusion: Root canal preparations using files with different cross-section shapes (e.g., triangular and rectangular), followed by irrigation with 2.5%
NaOCl and 17% EDTA, produced smear layers in the apical third area. However, root canal preparations using files with a triangular cross-section
shape were shown to reduce smear layer production compared with files with a rectangular cross-section shape

Keywords: Tooth apex, Rectangular cross-section, Root canal preparation, Smear layer, Triangular cross-section

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HERISA, M., MAHARANI, N., MEIDYAWATI, R., ARTININGSIH, D. A. N. P., & NAZAR, K. (2020). SMEAR LAYER REDUCTION IN ROOT CANALS PREPARED WITH TRIANGULAR AND RECTANGULAR FILES AS EVALUATED BY SCANNING ELECTRON MICROSCOPY. International Journal of Applied Pharmaceutics, 12(2), 27-30. https://doi.org/10.22159/ijap.2020.v12s2.OP-21
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