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Glass ionomer cement hardness after different materials for surface protection
Author(s) -
Brito Cecilia R.,
Velasco Leandro G.,
Bonini Gabriela A. V. C.,
Imparato José Carlos P.,
Raggio Daniela P.
Publication year - 2010
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.32524
Subject(s) - varnish , glass ionomer cement , materials science , knoop hardness test , adhesive , hardness , indentation hardness , composite material , bond strength , dentistry , dental cement , microstructure , medicine , layer (electronics) , coating
The aim of the present study was to evaluate the Knoop hardness of high viscous glass ionomer cement (GIC) Ketac™ Molar Easy Mix (3M ESPE, Saint Paul, USA) submitted to different types of compounds for surface protection. Sixty specimens of GIC were made in PVC molds with 7.5 mm diameter and 2.5 mm thickness. Divided in 6 groups: G1, Control (no protection); G2, Cavitine® (Copal varnish); G3, Magic® bond (Adhesive); G4, Adper™ Single Bond 2 (Single bottle adhesive); G5, Solid Petroleum Jelly; G6, Nail Varnish. The surface protection was applied after initial setting reaction. The specimens were immersed in deionized water, at 37°C, for 24 h. The surfaces were polished in a rotation machine (Aropol 2V). The hardness test was accomplished in a Digital Microhardness tester HVS‐100. In each specimen five indentations were done and repeated after 30 days and 4 months, under the same conditions. The results were submitted to Two‐way ANOVA and Tukey Test. The only material that differed from the control group was the nail varnish ( p < 0.001), with the other materials showing no significant difference from the control group. It was concluded that the best material for surface protection of GIC was the nail varnish, but because of possible harmful effects, petrolleum jelly could be a better option. © 2009 Wiley Periodicals, Inc. J Biomed Mater Res, 2010