%0 Journal Article
%T Color change using HSB color system of dental resin composites immersed in different common Amazon region beverages
%A Costa e Silva
%A D¨¦bora da
%A Tiradentes
%A Sanmya Beatriz da Silva Pereira
%A Parente
%A Rosana Cristina Pereira
%A Bandeira
%A Maria Fulg¨ºncia Costa Lima
%J Acta Amazonica
%D 2009
%I Instituto Nacional de Pesquisas da Amaz?nia
%R 10.1590/S0044-59672009000400024
%X the purpose of this study is to evaluate in vitro the color stability of composite resins when exposed to beverages with high coloring contents from the amazon region. 240 samples from four different composite brands (natural look, z350, 4seasons and opallis) of hue a3 were fabricated using an acrylic matrix. the samples were stored in distilled water at 37oc for 24 hours. the initial color (t0) was registered using a canon eos rebel xti 10 mp camera, and then the samples were divided into four groups (n=15): g1 (coffee), g2 (a£¿a¨ª juice), g3 (energetic guaran¨¢) and g4 (control - distilled water). the samples were exposed to solutions of des (6hs) and re (18hs) and placed in a double boiler under constant agitation, at 37oc for 30 days. the samples were immersed in the coloring solutions for 15 minutes daily. after 7, 15 and 30 days, new photographic registers were made (t1, t2 and t3). the images were analyzed using corel photo-paint 12 software to identify the colors through the hsb system. the kruskal-wallis and t tests (p<0.05) demonstrated significant differences in color (hue, saturation and brightness). the results revealed that none of the tested composites showed color stability when exposed to coloring solutions, and that the amazon region beverages (a£¿a¨ª juice and energetic guaran¨¢) showed to be less coloring than coffee.
%K composite resins
%K coloring agents
%K color perception tests.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0044-59672009000400024&lng=en&nrm=iso&tlng=en