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Volume 3 Issue 6 December (Supplement2) 2015

Original Articles

COMPARATIVE EFFECT OF DIFFERENT REMINERALIZING AGENTS ON THE MICROHARDNESS OF BLEACHED ENAMEL- AN IN VITRO STUDY
Shalu Krishan, Nidhi Aggarwal, Anurag Aggarwal, Vikas Luthra

Background: This study was undertaken to investigate the effect of McInnes bleaching agent on the microhardness of enamel before and after bleaching and to evaluate the effect of G C Tooth Mousse Plus and Toothmin on the bleached enamel surface for its microhardness using Vickers microhardness indenter. Materials and methods: Twenty freshly extracted, sound central incisors were selected and their roots were removed. Twenty samples were divided into 2 groups; n=10 (Group 1for tooth mousse plus and 2 for Toothmin). Microhardness was measured after seventh (1st remineralization cycle) and fourteenth day (2nd remineralization cycle) respectively. Results: Baseline microhardness values of GC Toothmousse and Toothmin when compared with first cycle of bleaching decrease by 1.07% (P<0.001) and .96% (P<0.001) respectively, which is highly significant and a decrease of 2.45% (P<0.001) and 2.56% (P<0.001) after second bleaching cycle  which is also highly significant. But significant difference was found between baseline microhardness values and remineralization values in case of GC Toothmouse Plus while in case of Toothmin, it was not significant. Conclusion: McInnes bleaching agent causes a decrease in the microhardness of enamel by causing enamel demineralization. GC Tooth mousse plus and toothmin used in this study caused increase in microhardness of the bleached enamel. Toothmin application led to more remineralization as compared to GC Tooth Mousse Plus even though it could not reach baseline level.
Key words: Bleaching agent, demineralisation, microhardness, remineraslisation.

 
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