In vitro determination of the critical pH demineralization of human dental enamel irradiated with Nd:YAG laser associated with fluoridated product
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2019
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Photobiomodulation, Photomedicine, and Laser Surgery
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The use of fluoride products associated with high intensity laser
irradiation are beneficial for dental caries prevention because it
increases the surface area, improving the formation of fluorapatite
(FA), which gives greater acid-resistance of enamel against bacterial
acids. The objective of this study is to determine the critical
pH of dental enamel treated with acid fluoride phosphate
12,300 lF-/g (APF) and Nd:YAG laser 84 J/cm2, as there is no
precedent to determine this pH. The study consisted of 4 groups
(n = 15): G1: Negative Control; G2: APF; G3: Nd:YAG; G4:
APF + Nd:YAG. Each group was randomized into three subgroups
(n = 5) for pH cycling. The cycling was designed to simulate three
conditions: below critical pH of enamel hydroxyapatite (pH 5.0);
pH below critical for hydroxyapatite and fluorapatite (pH 4.5);
condition further below the critical situation to investigate extent
of acid resistance of the enamel (pH 4.0). The samples were analyzed by scanning electron microscopy (SEM), Fourier infrared
spectroscopy (FTIR) and solutions were quantified fluoride
(specific ion electrode) and phosphate (colorimetric method). In
SEM and FTIR (phosphate band) at pH 5, only the APF and APF
+ Nd:YAG groups did not present demineralization. At pH 4.5,
only the APF + Nd:YAG group was integrated. At pH 4, APF +
Nd:YAG showed signs of mild demineralization while the other
groups showed aggressive signals. It is concluded that the irradiated
fluorapatite has critical dissolution pH different from fluorapatite
formed only with the application of fluorine.
Como referenciar
JUVINO, AMANDA C.; ZAMATARO, CLAUDIA B.; RABELO, THAIS F.; KUCHAR, NIELSEN G.; ZANINI, NATHALIA; CASTRO, PEDRO; ZEZELL, DENISE. In vitro determination of the critical pH demineralization of human dental enamel irradiated with Nd:YAG laser associated with fluoridated product. Photobiomodulation, Photomedicine, and Laser Surgery, v. 37, n. 10, p. A8-A9, 2019. DOI: 10.1089/photob.2019.29013.abstracts. Disponível em: http://repositorio.ipen.br/handle/123456789/32220. Acesso em: 26 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.