Effects of surrounding and underlying shades on the color adjustment potential of a single-shade composite used in a thin layer
Mariana Silva Barro, Paula Fernanda Damasceno Silva, Marcia Luciana Carregosa Santana, Rafaella Mariana Fontes Braganca, Andre Luis Faria-e-Silva,
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( Mariana Silva Barro ) -
( Paula Fernanda Damasceno Silva ) -
( Marcia Luciana Carregosa Santana ) -
( Rafaella Mariana Fontes Braganca ) -
( Andre Luis Faria-e-Silva ) -
Abstract
Objectives: This study aimed to evaluate the surrounding and underlying shades¡¯ effect on the color adjustment potential (CAP) of a single-shade composite used in a thin layer.
Materials and Methods: Cylinder specimens (1.0 mm thick) were built with the Vittra APS Unique composite, surrounded (dual specimens) or not (simple specimens) by a control composite (shade A1, A2, or A3). Simple specimens were also built only with the control composites. Each specimen¡¯s color was measured against white and black backgrounds or the simple control specimens with a spectrophotometer (CIELAB system). The whiteness index for dentistry (WID) and translucency parameters (TP00) were calculated for simple specimens. Differences (¥ÄE00) in color between the simple/dual specimens and the controls were calculated. The CAP was calculated based on the ratios between data from simple and dual specimens.
Results: The Vittra APS Unique composite showed higher WID and TP00 values than the controls. The highest values of ¥ÄE00 were observed among simple specimens. The color measurements of Vittra APS Unique (simple or dual) against the control specimens presented the lowest color differences. Only surrounding the single-shade composite with a shaded composite barely impacted the ¥ÄE00. The highest CAP values were obtained using a shaded composite under simple or dual specimens.
Conclusions: The CAP of Vittra APS Unique was strongly affected by the underlying shade, while surrounding this composite with a shaded one barely affected its color adjustment.
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Color; Composite resins; Dental materials; Dental restoration, Permanent; Esthetics, Dental
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