Influence of the resin cements color on the shade of porcelain venners after acelerated artificial aging
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Data
2013
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Resumo
Objectives: The aim of this study was to evaluate the influence
of the color of the resin luting cement in the final shade
of minimally invasive porcelain veneers after accelerated artificial
aging (AAA). Material and methods: 20 bovine teeth were
collected, prepared and divided into two groups. The roots
were removed and the buccal surfaces were polished to obtain
a flat surface. Porcelain discs (IPS Empress Esthetic) were produced
to a standardized shade (ET1) and thickness (0.6mm).
The teeth and the veneers surfaces were prepared according
to manufacturer recommendations. For group I (n=10), the
White-Opaque (WO) base-paste was used and for group II
(n=10) the Yellow (Y) base-paste. Each specimen was photocured
for 60 s. The specimens were next subjected to AAA. They
were submitted to color readings with a spectrophotometer
in three moments: after the preparation (only the substrate),
after the cementation and polymerization of the veneers and
after the AAA. Were obtained values of L*, a* and b* and the
total color change was calculated (ΔE*). Values obtained were
subjected to statistical analysis in SPSS 17.0 for Windows with
a significance of 0.05. Results: When comparing the cements,
the Y cement showed higher ΔE*, lower L* and higher b* after
AAA than the WO. Conclusion: Both cements could mask the
substrate color. With AAA, only the Y shade showed a ΔE* clinically
unacceptable, becoming more yellow (higher b*) and
losing lightness (lower L*).
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Palavras-chave
Dental veneers, Color perception tests, Resin cements, Aging, Facetas dentárias, Testes de percepção de cores, Cimentos de resina, Envelhecimento
Citação
Magalhães, Ana Paula R.et al. Influence of the resin cements color on the shade of porcelain venners after acelerated artificial aging. Robrac: revista odontológica do Brasil Central, Goiânia, v. 21, n. 60, p. 11-15, 2013.