Influence of fluorescent dye on mechanical properties of adhesive systems

Influence of fluorescent dye on physical–mechanical properties of luting cements for confocal microscopy analysis

“…This study demonstrated that it is possible to incorporate a fluorescent dye (rhodamine B) in luting cements to facilitate optical detection of interfacial leakage, with no deleterious effects on the physical or mechanical properties of these agents, in agreement with the original study of rhodamine B incorporation into adhesive systems (Araújo et al, ).…”

“…To examine the influence of the fluorescent dye on the physical–mechanical properties, 0.03 wt % (Araújo et al, ; D'Alpino et al, ) of rhodamine B (Sigma, St. Louis, MO, USA) was mixed with the base paste of the luting cement systems tested. The mixture was kept in a continuous stirring device (AP22 Phoenix Luferco, Phoenix Ind and Com Equips Scientific LTDA; Araraquara, SP, Brazil) for at least 2 h to ensure complete dissolution (Arrais et al, ).…”

“…Since CLSM is used to assess the micromorphology of bonded interfaces, it is extremely important to evaluate the effects of adding fluorescent dyes on the physical and mechanical properties of luting cements as was done in previous studies examining adhesive bond systems (Araújo et al, ). Thus, the objective of the present study was to evaluate whether addition of small amounts (0.03 wt%) of the rhodamine B fluorescent dye affected the physical and mechanical properties of conventional, self‐etching, and self‐adhesive luting cements.…”

Efeito de adição de rodamina B e fluoresceína sódica a sistemas adesivos não simplificados: aspectos fotofísicos e físico-químicos

“…Isso sugere, dentre outras coisas, que não ocorrem interações contraproducentes entre esses corantes e os iniciadores (nos adesivos) com impacto na geração de radicais livresespecialmente daqueles derivados dos iniciadores. Além do mais, os resultados desmistificam a ideia criada de que esses corantes podem atrapalhar a polimerização por competir com os iniciadores no que diz respeito à absorção de luz (D'ALPINO et al, 2006a;ARAÚJO et al, 2013). Haja vista a alta intensidade das unidades fotopolimerizadoras disponíveis (alegadamente de 1.200 mW/cm 2 a da utilizada nesse estudo), a energia luminosa gerada durante a fotoativação das amostras resinosas deve ser mais do que suficiente para excitar a canforoquinona (ou outro iniciador) dispersa nos sistemas monoméricos.…”