Degree of conversion, translucency and intrinsic color stability of composites during surface modeling with lubricants

  • Ana Margarida dos Santos Melo
  • Thiago Jonathan Silva dos Santos
  • Matheus Dantas Tertulino
  • Maria Cristina dos Santos Medeiros
  • Ademir Oliveira da Silva
  • Boniek Castillo Dutra Borges

Abstract




The tackiness presented by resins causes problems in performing the incremental technique, which can be improved by using lubricants in handling. Aim: To evaluate the influenceof two adhesive systems as brush lubricants on the degree of conversion, translucency and intrinsic color stability of composite resins. Methods: Samples (n=10) were fabricated according to the composites (Filtek Z350 XT, IPS Empress Direct, and Esthet X HD), shades (bleach shade and A2), and lubricants used (Adper Single Bond 2, Adper Scotchbond Multi-Purpose bonding agent, and no lubricant). Single composite increments were insertedinto a Teflon mold. The composite surface was then modeledusing a brush dipped in an adhesive system. The control group was fabricated with no additional modeling. The surface degree of conversion (DC) was measured using Fourier transform infrared spectroscopy; translucency and intrinsic color stability were accessed using a spectrophotometer. Data were analyzed using three-way ANOVA and the Tukey test (p<0.05). Results:Scotchbond Multi-Purpose decreased the DC of all composites and shades in comparison with the control group (p<0.05), although it did not decrease color stability (p<0.05). The bleach shade of IPS Empress Direct and Esthet X HD showed higher translucency than the A2 shade when lubricated with the adhesive systems (p<0.05).Conclusion: Therefore, the two tested adhesive systems used as brush lubricants on composites promoted changes to the surface degree of conversion and aesthetic properties.





 

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Published
2018-08-18
How to Cite
MELO, Ana Margarida dos Santos et al. Degree of conversion, translucency and intrinsic color stability of composites during surface modeling with lubricants. Brazilian Journal of Oral Sciences, [S.l.], p. e18325, aug. 2018. ISSN 1677-3225. Available at: <https://www.fop.unicamp.br/bjos/index.php/bjos/article/view/1389>. Date accessed: 22 july 2019. doi: https://doi.org/10.20396/bjos.v17i0.8652924.
Section
Original Research

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