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KMID : 1023420090090050525
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Journal of Dental Hygiene Science
2009 Volume.9 No. 5 p.525 ~ p.530
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The Bleaching Effect of Plasma Arc and 35% Carbamaide Peroxide and its Influence on the Enamel Surface
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Koo Hyo-Jin
Song Keun-Bae
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Abstract
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The purpose of this study was to evaluate color change and enamel surface changes using the plasma arc light source during tooth bleaching treatments. Twenty-four extracted bovine incisors were selected and embedded in the resin blocks. All the specimens were highly polished and discolored with commercial COCK®. High concentration carbamide peroxide with and without plasma arc were used for bleaching. Specimens were bleached for 1 hour per week during 3 weeks. Color and enamel surface changes were determined with colorimeter (TC-8600A), microhardness tester(MXT-a7), scanning electron microscope(S-4200). All the collected data were analyzed with paired t-test, t-test and one-way ANOVA. After the bleaching, both groups showed the color changes(ΔE*). Microhardness of two group decreased after tooth bleaching. The SEM evaluation of enamel surface of both group showed a similar morphology of decalcification after tooth bleaching. Office bleaching using the plasma arc application with 35% carbamide peroxide can increase the color change. Office bleaching using the high concentration of carbamide peroxide and plasma arc also detract the outer surface of enamel. It is recommended that careful procedures are needed during office bleaching with high concentration of carbamide peroxide and light source.
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KEYWORD
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Carbamide peroxide, Enamel surface change, Office bleaching, Plasma arc
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