Degree of Conversion, Translucency and Intrinsic Color Stability of Composites During Surface Modeling With Lubricants


  • Ana Margarida dos Santos Melo Federal University of Rio Grande do Norte
  • Thiago Jonathan Silva dos Santos Federal University of Rio Grande do Norte
  • Matheus Dantas Tertulino Federal University of Rio Grande do Norte
  • Maria Cristina dos Santos Medeiros Federal University of Rio Grande do Norte
  • Ademir Oliveira da Silva Federal University of Rio Grande do Norte
  • Boniek Castillo Dutra Borges Federal University of Rio Grande do Norte



Composite resins. Dentin-bonding agents. Surface properties.


The tackiness presented by resins brings inconveniences to the incremental technique, which can be improved by using lubricants in handling. Aim: To evaluate the influence of 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, Scotchbond Multi-Purpose bonding agent, and no lubricant). Single composite increments were inserted into a Teflon mold. The composite surface was then modeled using 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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Author Biographies

Ana Margarida dos Santos Melo, Federal University of Rio Grande do Norte

Department of Dentistry

Thiago Jonathan Silva dos Santos, Federal University of Rio Grande do Norte

Department of Dentistry

Matheus Dantas Tertulino, Federal University of Rio Grande do Norte

Department of Dentistry

Maria Cristina dos Santos Medeiros, Federal University of Rio Grande do Norte

Department of Dentistry

Ademir Oliveira da Silva, Federal University of Rio Grande do Norte

Institute of Chemistry

Boniek Castillo Dutra Borges, Federal University of Rio Grande do Norte

PhD, Associate Professor, Department of Dentistry, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte, Brazil.


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How to Cite

Melo AM dos S, Santos TJS dos, Tertulino MD, Medeiros MC dos S, Silva AO da, Borges BCD. Degree of Conversion, Translucency and Intrinsic Color Stability of Composites During Surface Modeling With Lubricants. Braz. J. Oral Sci. [Internet]. 2018 Jul. 13 [cited 2022 Aug. 10];17:e18325. Available from:

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