Enamel and Dentin Microhardness and Chemical Composition After Experimental Light-activated Bleaching

Operative Dentistry
Eva KlaricZrinka Tarle

Abstract

To evaluate 1) the influence of five bleaching agents (with additional light activation) on enamel and dentin surface microhardness and chemical composition and 2) the remineralizing potential of artificial saliva and amorphous calcium phosphate (ACP). The study was conducted on 125 human third molars dissected into quarters for separate enamel and dentin measurements. The bleaching process was performed with 38% and 25% hydrogen peroxide (HP) and 30%, 16%, and 10% carbamide peroxide (CP) gels two times for 15 minutes each time. All bleaching gels were tested alone and in combination with ZOOM2, light-emitting diode (LED), organic LED, and femtosecond laser. A total of 25 bleaching combinations (n=10) were evaluated. Microhardness was measured by a Vickers diamond. Chemical analysis was performed using energy-dispersive X-ray spectroscopy. Bleaching agents used in the absence of light activation caused a significant reduction in enamel and dentin surface microhardness (p<0.001), ranging from 8% for 16% CP to 40% for 25% HP. The effects of different light activations were negligible. After two-week treatment with ACP and artificial saliva, maximum deviation from baseline microhardness was just 3%. Such treatment increased the co...Continue Reading

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Citations

Oct 12, 2016·Dental Materials Journal·Eva Klaric SeverZrinka Tarle
Sep 13, 2017·Acta Odontologica Scandinavica·Eva Klaric SeverZrinka Tarle
Aug 10, 2019·Indian Journal of Dental Research : Official Publication of Indian Society for Dental Research·Débora Drummond Hauss MonteiroCláudia Silami Magalhães
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Jan 30, 2021·Photodiagnosis and Photodynamic Therapy·Roberta Soares KobayashiVanessa Cavalli
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May 30, 2021·Photodiagnosis and Photodynamic Therapy·Joatan Lucas de Sousa Gomes CostaMilton Carlos Kuga
Sep 2, 2021·Photodiagnosis and Photodynamic Therapy·Joatan Lucas de Sousa Gomes CostaMilton Carlos Kuga

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