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An Evaluation of the Repetitive Tooth Bleaching with Nonthermal Atmospheric Pressure Plasma
International Journal of Oral Biology ; : 243-251, 2016.
Artículo en Inglés | WPRIM | ID: wpr-179945
ABSTRACT
This study was undertaken to achieve a high bleaching efficacy with plasma, through longer application and reparative bleaching processes, by different shade evaluation methods. Extracted human teeth were divided into 6 groups (n=10). All teeth were treated in pairs. Low concentration of 15% carbamide peroxide (CP) was applied, with and without plasma, for 10, 20, and 30-min tooth bleaching, respectively. The bleaching procedure was repeated once daily for four days. The teeth were maintained in a moist environment provided by artificial saliva. The Vitapan Classical shade guide and Commission Internationale de L'Eclairage (CIELAB) color system were collectively used to measure the bleaching efficacy. Color evaluation was statistically analyzed using Student t-test and one-way analysis of variance (ANOVA) complemented by Tukey's test. Combining the plasma with 15% CP showed significantly greater color changes compared to bleaching without plasma (p<0.05). A high bleaching efficacy with plasma is proportional to the repetitive application and the treatment time. A 30-min application with plasma provided the best bleaching. Repetitive bleaching showed lower probability of color relapse of the bleached tooth. The color change by shade guide correlated with the changes in CIELAB color system. A value of 1 color change units (CCU) conversion factor for overall color change (ΔE) values comparisons was 3.724 values. The two measuring methods provide a more accurate correspondence of color change. The repetitive and longer application for tooth bleaching, combined with plasma, has a strong bleaching effect and produces whiter teeth.
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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Plasma / Recurrencia / Presión Atmosférica / Saliva Artificial / Diente / Blanqueamiento de Dientes / Urea / Proteínas del Sistema Complemento Límite: Humanos Idioma: Inglés Revista: International Journal of Oral Biology Año: 2016 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Plasma / Recurrencia / Presión Atmosférica / Saliva Artificial / Diente / Blanqueamiento de Dientes / Urea / Proteínas del Sistema Complemento Límite: Humanos Idioma: Inglés Revista: International Journal of Oral Biology Año: 2016 Tipo del documento: Artículo