, Volume 107, Issue 4, pp 507–512 | Cite as

Factors affecting the color stability and staining of esthetic restorations

  • Thaiane Schroeder
  • Paula Barcellos da Silva
  • Gabriela Romanini Basso
  • Marina Christ Franco
  • Tamires Timm Maske
  • Maximiliano Sérgio CenciEmail author
Original Article


This study aimed to assess the color stability of two composite resins, unprotected or protected with a hydrosoluble gel (oxygen inhibitor) during final polymerization, when subjected to different staining solutions and daily tooth brushing simulation. Nanohybrid composite (IPS Empress Direct) or nanofilled composite (Filtek Z350) were used to produce round samples that were either unprotected or protected with a hydrosoluble gel before the final cycle of polymerization. For 5 days, the samples were immersed for 1 h/day in four different staining solutions: distilled water (control), coffee, soft drink, and red wine. Once a day, the samples were also subjected to mechanical brushing with soft-bristled brushes for 30 min. The combination of experimental conditions produced 16 groups (n = 10). Color changes (ΔE) were evaluated at baseline and after mechanical brushing cycles for 1, 3, and 5 days. Data were analyzed by linear regression models. Protection with hydrosoluble gel was able to significantly reduce the color change only on the first day (p = 0.001). The type of composite resin did not significantly affect the color change over the days. Wine affected composite resin color change only on the first day (p = 0.002). Over time, color stability of composite resins did not improve with the protection of a hydrosoluble gel before the final polymerization.


Dentistry Resin composites Staining Tooth brushing Color stability 



The authors do not have any financial interest in the companies whose materials are included in this article.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© The Society of The Nippon Dental University 2019

Authors and Affiliations

  1. 1.Graduate Program in DentistryFederal University of PelotasPelotasBrazil

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