Aging influence on roughness and color stability of encapsulated glass ionomer cements

Authors

  • Adriana Bona Matos Universidade de São Paulo
  • Bruno Bachiega da Silva Universidade de São Paulo
  • Erika Michele dos Santos Araújo Universidade de São Paulo
  • Beatriz Togoro Ferreira da Silva Universidade de São Paulo

DOI:

https://doi.org/10.11606/issn.2357-8041.clrd.2019.154506

Keywords:

Color, Glass Ionomer Cement, Aging

Abstract

Objective: To analyze effects of differents agings on the roughness and color of different encapsulated glass ionomer cements (GIC). Materials and methods: Two glass ionomer cements (Conventional/Self Cure (SC) and modified resin/Light Cure (LC)) and three aging (baseline, post-thermal cycling and post-thermal cycling + storage for 7 months). Fifty-two discs (n = 13) were made. The color stability was performed with spectrophotometers (VITA Easyshade and Konica Minolta CE3700A), and the roughness test with optical profilometer (Proscan 2100, Scantron). Results: The data were analyzed with two-way ANOVA and Tukey’s test (p < 0.05). The GICs presented statistically significancy when compared (p < 0.05), for roughness (SC = 0,202μm e LC = 0,241), the aging protocols tested promoted a significant change in surface roughness baseline = 0,278μm, post-cycling = 0,220μm and storage = 0,167μm and for the color (SC ΔE = 3,89 and LC ΔE = 4,94). However, the interaction between the factors was not statistically significant (p > 0.05). For ΔL*, Δa*, Δb*, there was a difference in the interaction of the factors, with a greater change in ΔL* for the GIC LC post-thermal cycling + storage). For Δa* there was a statistically significant difference (p < 0.05) between aging, being the higher alteration for the GIC LC group post-thermal cycling. Greater change in the b* coordinate was observed for the GIC LC post-thermal cycling + storage. Conclusions: The different GICs presented different surface roughness and color. The resin-modified GIC LC showed to be rougher when compared to the conventional GIC SC. However, both GICs became less rough over time. The post-thermal cycling + storage for 7 months was the aging protocol that most interfered in the roughness and color of different types of GICs.

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Author Biographies

Adriana Bona Matos, Universidade de São Paulo

Departamento de Dentística, Faculdade de Odontologia, Universidade de São Paulo (USP), São Paulo, SP, Brasil.

Bruno Bachiega da Silva, Universidade de São Paulo

Faculdade de Odontologia da Universidade de São Paulo (USP), São Paulo, SP, Brasil.

Erika Michele dos Santos Araújo, Universidade de São Paulo

Departamento de Dentística, Faculdade de Odontologia, Universidade de São Paulo (USP), São Paulo, SP, Brasil.

Beatriz Togoro Ferreira da Silva, Universidade de São Paulo

Departamento de Dentística, Faculdade de Odontologia, Universidade de São Paulo (USP), São Paulo, SP, Brasil.

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Published

2019-06-25

Issue

Section

Original Research