Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/46656
Type: Artigo de Periódico
Title: Color change, diffusion of hydrogen peroxide and enamel morphology after in-office bleaching with violet light or non-thermal atmospheric plasma: an in vitro study
Authors: Matheus Kury
Carolina Perches
Daylana Pacheco da Silva
Carolina Bosso André
Cinthia Pereira Machado Tabchoury
Marcelo Giannini
Vanessa Cavalli Gobbo
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-Δ Eab, CIEDE2000-Δ E00 , 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 (Δ Eab , ΔE00 , ΔWID , ΔL, and μL/mL) and Kruskal-Wallis and Mann-Whitney tests (Δ a and Δ b, 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
Subject: Carbamide peroxide
Hydrogen peroxide
Plasma
Tooth bleaching
language: eng
metadata.dc.publisher.country: Brasil
Publisher: Universidade Federal de Minas Gerais
Publisher Initials: UFMG
metadata.dc.publisher.department: FAO - DEPARTAMENTO DE ODONTOLOGIA RESTAURADORA
Rights: Acesso Restrito
metadata.dc.identifier.doi: 10.1111/jerd.12556
URI: http://hdl.handle.net/1843/46656
Issue Date: 16-Dec-2019
metadata.dc.url.externa: https://onlinelibrary.wiley.com/doi/10.1111/jerd.12556
metadata.dc.relation.ispartof: Journal of Esthetic and Restorative Dentistry
Appears in Collections:Artigo de Periódico

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