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- Title
Color change, diffusion of hydrogen peroxide, and enamel morphology after in‐office bleaching with violet light or nonthermal atmospheric plasma: An in vitro study.
- Authors
Kury, Matheus; Perches, Carolina; Silva, Daylana P.; André, Carolina B.; Tabchoury, Cínthia P. M.; Giannini, Marcelo; Cavalli, Vanessa
- Abstract
Objective: The aim is to evaluate the effect of violet light (VL) and nonthermal atmospheric plasma (NTAP) combined with or without 35% hydrogen peroxide (HP) and 37% carbamide peroxide (CP). Methods: Bovine crowns were divided into (n = 10) VL, VL/HP, VL/CP, NTAP, NTAP/HP, NTAP/CP, HP, CP, and C (control) groups. Color and whiteness change (CIELAB—ΔEab, CIEDE2000—ΔE00, whiteness index—ΔWID), color parameters (ΔL, Δa, and Δb), and intrapulpal concentration (μL/mL) of HP were assessed by spectrophotometry. Scanning electron microscopy evaluated the morphology of enamel surface. Data were analyzed by two‐way analysis of variance and Tukey (ΔEab, ΔE00, ΔWID, ΔL, and μL/mL) and Kruskal‐Wallis and Mann‐Whitney tests (Δa and Δb, α = 5%). Results: VL increased ΔEab and ΔWID of CP (P <.05). VL and NTAP alone resulted in perceptible color and whiteness change, but lower than those in the gel‐treated groups (P <.05). Activation modes increased ΔL compared with that of C, but only VL enhanced Δb when applied alone or combined with CP. VL and NTAP did not increase HP diffusion (P >.05) or cause alterations in enamel morphology. However, HP and CP promoted topographical changes. Conclusion: VL and NTAP changed color to a lesser extent than bleaching gels. VL produced supplementary effectiveness only for CP (ΔEab and ΔWID), without increasing HP diffusion or changing enamel morphology. Clinical Significance: Although violet LED light and nonthermal atmospheric plasma (NTAP) promoted in vitro perceptible bleaching without compromising enamel morphology, bleaching gels (hydrogen peroxide and carbamide peroxide) were more effective than VL or NTAP. VL or NTAP did not increase intrapulpal diffusion of peroxide.
- Subjects
ANALYSIS of hydrogen peroxide; ANALYSIS of variance; ANIMAL experimentation; ATMOSPHERIC pressure; COLORIMETRY; DENTAL crowns; DENTAL enamel; PHARMACEUTICAL gels; PEROXIDES; SCANNING electron microscopy; SPECTROPHOTOMETRY; STATISTICS; SWINE; TOOTH whitening; DATA analysis; MANN Whitney U Test; KRUSKAL-Wallis Test
- Publication
Journal of Esthetic & Restorative Dentistry, 2020, Vol 32, Issue 1, p102
- ISSN
1496-4155
- Publication type
Article
- DOI
10.1111/jerd.12556