Tooth whitening recovers the color of pre-stained composites

Aim: To assess the effect of home-whitening on aged and stained composite. Methods: Fifteen disc-shaped specimens (10 mm diameter x 2 mm thick) of Filtek Z350XT, shade A2E were fabricated, polished and embedded in wax, leaving exposed the top surface. The specimens were allocated to three groups (n=...

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Bibliographic Details
Published in:Brazilian journal of oral sciences 2017-04, Vol.15 (2), p.163
Main Authors: Farinon, Camila Bruscato, Pasqualotto, Giovanna Signori, Carraro, Kauani, Rodrigues Junior, Sinval Adalberto
Format: Article
Language:English
Subjects:
Tooth bleaching. Tooth bleaching agents. Dental restoration. Permanent
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Summary:Aim: To assess the effect of home-whitening on aged and stained composite. Methods: Fifteen disc-shaped specimens (10 mm diameter x 2 mm thick) of Filtek Z350XT, shade A2E were fabricated, polished and embedded in wax, leaving exposed the top surface. The specimens were allocated to three groups (n=5): A – the specimens remained dry; B – conditioning in distilled water and; C – conditioning in distilled water and coffee. They were next subjected to whitening with 10% carbamide peroxide (Whiteness Perfect) for 4 h daily for 1, 2 and 4 weeks. Shade was measured with a spectrophotometer Easyshade and expressed based on the CIE L*a*b* system (ΔE*). Surface roughness was measured with a roughness meter (Ra-µm). Data were analyzed with two-way ANOVA and Tukey’s test (α=0.05). Results: Conditioning, grouping and the interaction between both, influenced the ΔE* (p
ISSN:1677-3225
1677-3225
DOI:10.20396/bjos.v15i2.8648755