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Effect of bleaching on color change and refractive index of dental composite resins

Date

2008

Author

Hubbezoglu, Ihsan
Akaoglu, Baris
Dogan, Arife
Keskin, Selda
Bolayir, Giray
Ozcelik, Suleyman
Dogan, Orhan Murat

Metadata

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Abstract

This study investigated the effects of three bleaching agents (Whiteness Perfect, Whiteness Super, and Whiteness HP) on the color change and refractive index of three dental composites (Admira, Durafill VS, and Gradia Direct). Twenty diskshaped specimens (10 x 2 mm) of each composite were prepared and divided into four subgroups (n = 5). An unbleached group was used as a control, while the remaining specimens in the three subgroups were bleached with one of the bleaching agents respectively. Color change was assessed according to CIELAB color system and refractive indices were determined by phase modulated spectroscopic ellipsometry. Color differences between bleaching and baseline value (Delta E) were less than 3.3 for all groups. However, bleaching with Whiteness HP led to noticeable color changes for Admira and Durafill VS. While this agent had no effect on the refractive indices of these composites, the other two agents containing carbamide peroxide increased their refractive indices. Therefore, results suggested that replacement of such composite restorations may be required after bleaching.

Source

DENTAL MATERIALS JOURNAL

Volume

27

Issue

1

URI

https://dx.doi.org/10.4012/dmj.27.105
https://hdl.handle.net/20.500.12418/10454

Collections

  • Makale Koleksiyonu [5200]
  • Makale Koleksiyonu [5745]
  • Öksüz Yayınlar Koleksiyonu - WoS [6162]



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