Restorative Dentistry and Endodontics

  • 제45권2호
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  • Pages.13.1-13.10
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  • 2020
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  • 2234-7658(pISSN)
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  • 2234-7666(eISSN)
대한치과보존학회 (The Korean Academy of Conservative Dentistry)
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Influence of modeling agents on the surface properties of an esthetic nano-hybrid composite

  • Kutuk, Zeynep Bilge (Department of Restorative Dentistry, School of Dentistry, Hacettepe University) ;
  • Erden, Ecem (Department of Restorative Dentistry, School of Dentistry, Hacettepe University) ;
  • Aksahin, Damla Lara (Department of Restorative Dentistry, School of Dentistry, Hacettepe University) ;
  • Durak, Zeynep Elif (Department of Restorative Dentistry, School of Dentistry, Hacettepe University) ;
  • Dulda, Alp Can (Department of Restorative Dentistry, School of Dentistry, Hacettepe University)
  • 투고 : 2019.09.28
  • 심사 : 2019.11.13
  • 발행 : 2020.05.31
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초록

Objective: The aim of this study was to evaluate the influence of different modeling agents on the surface microhardness (Vickers hardness number; VHN), roughness (Ra), and color change (ΔE) of a nano-hybrid composite with or without exposure to discoloration by coffee. Materials and Methods: Sixty-four cylinder-shaped nano-hybrid composite specimens were prepared using a Teflon mold. The specimens' surfaces were prepared according to the following groups: group 1, no modeling agent; group 2, Modeling Liquid; group 3, a universal adhesive (G-Premio Bond); and group 4, the first step of a 2-step self-adhesive system (OptiBond XTR). Specimens were randomly allocated into 2 groups (n = 8) according to the storage medium (distilled water or coffee). VHN, Ra, and ΔE were measured at 24 hours, 1 week, and 6 weeks. The Kruskal-Wallis test followed by the Bonferroni correction for pairwise comparisons was used for statistical analysis (α = 0.05). Results: Storage time did not influence the VHN of the nano-hybrid composite in any group (p > 0.05). OptiBond XTR Primer application affected the VHN negatively in all investigated storage medium and time conditions (p < 0.05). Modeling Liquid application yielded improved Ra values for the specimens stored in coffee at each time point (p < 0.05). Modeling Liquid application was associated with the lowest ΔE values in all investigated storage medium and time conditions (p < 0.05). Conclusion: Different types of modeling agents could affect the surface properties and discoloration of nano-hybrid composites.

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참고문헌

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피인용 문헌

  1. Effect of Modeling Resins on Microhardness of Resin Composites vol.15, pp.3, 2020, https://doi.org/10.1055/s-0041-1725577