Color stability and staining susceptibility of direct resin-based composites after light-activated in-office bleaching

Pei Wen Peng, Chiung Fang Huang, Ching Ying Hsu, Ann Chen, Ho Him Ng, Man Si Cheng, Shiang Tsay, Jia Yi Lai, Tzu Sen Yang, Wei Fang Lee

Research output: Contribution to journalArticlepeer-review

Abstract

This study evaluated color stability and staining susceptibility of five direct resin-based composites (RBCs) subjected to light-activated in-office bleaching with 40% hydrogen peroxide (HP). The test materials included 5 RBCs, which consisted of one nano-filled, one sub-micron, one bulk-filled, and two nano-hybrid RBC types. Ten disc-shaped specimens of each RBC were fabricated and divided into bleaching (BLE) and non-bleaching (CON) groups (n = 5 for each group). Specimens were then immersed in red wine solution over 4 h. A spectrophotometer was used to obtain Commission Internationale de l’Eclairage (CIE) L*a*b* parameters for each of the following periods tested: before bleaching (TBA), after bleaching (TBL), and after staining (TST). Color stability and staining susceptibility were evaluated using two metrics, CIEDE2000 color differences (∆E00 ) and whiteness variations using the whiteness index (∆WID). Data were analyzed using repeated measures two-way analysis of variance (ANOVA) (α = 0.05). Statistically significant and clinically unaccepted ∆E00 and ∆WID were observed for all tested specimens between TBA and TBL . The nano-hybrid type RBCs showed the highest discoloration among materials after bleaching treatment. The BLE group exhibited significantly higher ∆E00 and ∆WID than the CON group for all the tested RBCs between TBA and TST . The sub-micron type RBC showed the highest discoloration among materials after immersion in the red wine. Conclusion. The light-activated in-office bleaching with 40% HP’s influences on color and whiteness index were material-dependent. The use of bleaching treatment also increased the susceptibility to red wine for all RBCs.

Original languageEnglish
Article number2941
JournalPolymers
Volume13
Issue number17
DOIs
Publication statusPublished - Sep 2021

Keywords

  • Bleaching
  • Color
  • Red wine
  • Resin-based composites
  • Whiteness index

ASJC Scopus subject areas

  • Chemistry(all)
  • Polymers and Plastics

Fingerprint

Dive into the research topics of 'Color stability and staining susceptibility of direct resin-based composites after light-activated in-office bleaching'. Together they form a unique fingerprint.

Cite this