Effect of thickness on fluorescence of resin-composites and dental substrates

Authors

  • Carla Tavares Institute of Science and Technology – UNESP – Univ Estadual Paulista – School of Dentistry – Department of Restorative Dentistry – São José dos Campos – SP – Brazil.
  • Luiza Tavares Institute of Science and Technology – UNESP – Univ Estadual Paulista – School of Dentistry – Department of Restorative Dentistry – São José dos Campos – SP – Brazil.
  • Ayla Correia Institute of Science and Technology – UNESP – Univ Estadual Paulista – School of Dentistry – Department of Restorative Dentistry – São José dos Campos – SP – Brazil.
  • Eduardo Bresciani Institute of Science and Technology – UNESP – Univ Estadual Paulista – School of Dentistry – Department of Restorative Dentistry – São José dos Campos – SP – Brazil.
  • Taciana Caneppele Institute of Science and Technology – UNESP – Univ Estadual Paulista – School of Dentistry – Department of Restorative Dentistry – São José dos Campos – SP – Brazil.

DOI:

https://doi.org/10.14295/bds.2016.v19i3.1282

Abstract

Objective: This study evaluated the effect of thickness on fluorescence of resin composites and tooth substrates (enamel and dentin). Material and methods: Ninety bovine incisors were used, resulting in 45 dentin and 45 enamel disks (6 mm diameter and 0.5, 1, or 1.5 mm in thickness). Ninety discs of Charisma, Filtek Z350 and IPS Empress Direct (for enamel and dentin) resins at same dimensions were built. Fluorescence measurements were performed using a fluorescence spectrophotometer (RF-5301PC, Shimadzu Corp) with excitation at 365 nm. Data were submitted to 2-way ANOVA and Tukey’s post hoc tests (? = 0.05). Results: The 2- way - ANOVA revealed statistically significant differences for all factors, as well as the interaction between them (p <0.05). Dentin specimens (1.5 mm) showed highest fluorescence (128.33 A.U.), while Filtek Z350 (dentin - 1.0 mm) showed the lowest fluorescence (29.84 A.U.). Thickness influenced fluorescence values of enamel substrate. Conclusion: The thickness influenced fluorescence of enamel and all resin composite assessed showed fluorescence lower than natural dentin.

Keywords

Dental enamel; Dental resins; Dentin; Spectrometry, Fluorescence.

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Published

2016-09-29

Issue

Vol. 19 No. 3 (2016): Jul. - Sep. / 2016 - Published September 2016

Section

Clinical or Laboratorial Research