Dental zirconia generations: a comparative study of translucency parameters and light transmittance across varying thicknesses
DOI:
https://doi.org/10.4322/bds.2024.e4021Resumo
Objective: This in vitro study evaluated the translucency and polymerization light transmission of zirconia discs, produced from different generations of dental zirconia materials and with a consideration of varying thicknesses. Material and Methods: Disc-shaped specimens (0.5mm, 1.0mm, 1.5mm, 2.0mm, and 3.0mm) were produced from three A1 pre-shaded monochrome zirconia generations: conventional (3Y-TZP (inCoris TZI C); high translucency 4Y-PSZ (Cercon HT) and super translucent 5Y- PSZ (Cercon XT). A total of 90 discs were prepared. Translucency measurements were conducted using an intraoral spectrophotometer on each specimen against white and black backgrounds. Polymerization light transmission was assessed by measuring the transmitted light through each specimen emitted from confirmed emission spectra light-polymerizing units using a digital optical power meter. Two-way ANOVA tests (alpha = 0.05) were utilized to evaluate the differences between the influences of the zirconia generation and thickness parameters. Results: Different zirconia generations and thicknesses displayed distinct TP and transmittance values, with 5Y-PSZ exhibiting the highest values, which decreased as thickness increased. A significant interaction was found between zirconia generation and thickness on TP and transmittance (p - < 0.001), with more pronounced differences at lower thicknesses and non-significant differences at 3mm thickness. Conclusion: The study demonstrates that the generations and thickness of zirconia, and their interactions, significantly impact light transmission and TP values. Extra translucent cubic zirconia (5Y-PSZ) exhibits the highest TP, making it a more preferable choice for achieving predictable aesthetic outcomes that mimic teeth translucency and high polymerization light transmittance, ensuring adequate photopolymerization of the underlying resin luting cement.
KEYWORDS
Ceramics; Polymerization; Translucency; Transmittance; Zirconia.
Downloads
Downloads
Publicado
Como Citar
Edição
Seção
Licença
TRANSFERÊNCIA DE DIREITOS AUTORAIS E DECLARAÇÃO DE RESPONSABILIDADE
Toda a propriedade de direitos autorais do artigo "____________________________________________________________________" é transferido do autor(es) para a CIÊNCIA ODONTOLÓGICA BRASILEIRA, no caso do trabalho ser publicado. O artigo não foi publicado em outro lugar e não foi submetido simultaneamente para publicação em outra revista.
Vimos por meio deste, atestar que trabalho é original e não apresenta dados manipulados, fraude ou plágio. Fizemos contribuição científica significativa para o estudo e estamos cientes dos dados apresentados e de acordo com a versão final do artigo. Assumimos total responsabilidade pelos aspectos éticos do estudo.
Este texto deve ser impresso e assinado por todos os autores. A versão digitalizada deverá ser apresentada como arquivo suplementar durante o processo de submissão.
Plaudit
