In-office bleaching for the remineralization of enamel lesions filled with organic components of red wine
Kunimatsu, Y.; Iizuka, J.; Taniguchi, M.; Mikuni-Takagaki, Y.; Mukai, Y.
American Journal of Dentistry 31(1): 13-16
2018
ISSN/ISBN: 0894-8275 PMID: 29630799 Document Number: 695847
To investigate the effects of in-office bleaching on the remineralization of enamel lesions filled with organic components of red wine. Enamel specimens were exposed to 0.1% NaF solution for 1 minute immersed in red wine for 5 days at 37°C, and subjected to in-office bleaching followed by remineralization in 1.5 mM CaCl₂, 0.9 mM KH₂PO₄, 130 mM KCl, 20 mM HEPES, pH 7.0, at 37°C for 28 days. The presence of organic substances on the enamel surface was detected by Raman spectroscopy. The specimens were also subjected to transverse microradiography (TMR). Raman spectroscopy of baseline lesions showed characteristic peaks at 1,300-1,600 cm-1 which disappeared in bleached specimens. TMR showed that red wine formed subsurface lesions with surface content at approximately 22 mineral volume %. The integrated mineral loss (IML) was significantly lower in unbleached remineralized specimens than at baseline (P< 0.05). The IML of bleached remineralized specimens was lower than that of unbleached specimens, although not significantly (P> 0.05). Lesion depth was significantly lower in the bleached than in the unbleached group (P< 0.05). In-office bleaching can enhance the remineralization of enamel lesions filled with organic components of red wine.