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Acta Odontológica Venezolana

Print version ISSN 0001-6365

Abstract

MIRANDA ZARATE, Ana María; BERMEJO, Gabriel Nima; BAZAN PONCE DE LEON, Juan E  and  SARAVIA ROJAS, Miguel A. Efectos de un blanqueamiento dental con ozono y otro con peróxido de carbamida al 22% sobre la fuerza de adhesión al esmalte en diferentes intervalos de tiempo. Acta odontol. venez [online]. 2009, vol.47, n.4, pp.69-77. ISSN 0001-6365.

The objective of this study was to demonstrate that effects of ozone bleaching on enamel bond strength have a shorter duration in comparison with carbamide peroxide.  Twenty two bovine teeth were divided in three groups: Control and two experimental groups (Carbamide Peroxide-CP and Ozone-OZ). Teeth of control group were not submitted to bleaching and were stored in artificial saliva solution at 37° C for 24 hours. Teeth of experimental groups were exposed to one daily application of the bleaching agent for one week. After each treatment teeth were stored in artificial saliva solution, which was changed every three days. A resin composite block was built-up with Stae and Glacier 0, 1, 7, 14, 21 days post bleaching and microtensile bond strength (µTBS) was carried out 24 hours after adhesive-composite application. Data were analyzed by ANOVA and Tukey post hoc test (α=0.05). Results showed that bond strength were significantly different 0 and 1 day after both bleaching treatments. After one week post-ozone bleaching, bond strength returned to that of the untreated control group. Values for CP group were not suitable even three weeks post-bleaching

Keywords : Carbamide Peroxide; Ozone; Enamel; microtensile; post bleaching time; bonding.

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