color match of porcelain veneer light-cure resin cements with their respective try-in pastes: chemical stability

This study aimed to assess the color match of porcelain veneer light-cure resin cements with their respective try-in pastes. ten disc-shaped specimens with 0.5 mm thickness and 7 mm diameter were fabricated from choice 2, panavia v5, and variolink esthetic resin cements using silicon molds, and then light-cured. a cuvette was used for evaluating uncured resin cements and try-in paste specimens. the cured (n=30) and uncured (n=30) resin cement specimens as well as the try-in paste specimens (n=30) underwent reflectance spectrophotometry for determining their l*, a* and b* color parameters. the color difference (∆e) between the cement specimens and their try-in pastes in the three groups was calculated and analyzed using one-way anova and tukey’s test. minimum ∆e was observed between the cured variolink and its try-in paste (∆e=6.5), as well as between its cured and uncured specimens (∆e=6.2). the mean l* value of cured variolink and its try-in paste was higher than the corresponding values for the other two cements. the cured specimens of variolink showed higher mean a* and b* values than the cured specimens of the other two cements. the mean a* and b* parameters of variolink try-in paste were also higher than the corresponding values in the other two try-in pastes. try-in pastes can be used for the assessment of final color of cemented restorations. cured variolink and its try-in paste were lighter and yellower than the other two cements and their try-in pastes.