Effect of Nd:YAG laser on caries prevention of dental enamel by optical attenuation coefficient with optical coherence tomography (OCT)
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2018
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LASER DENTISTRY WORLD CONGRESS, 16th; DGL ANNUAL MEETING, 27th; INTERNATIONAL WALED CONGRESS, 6th
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Resumo
Caries is a multifactorial disease, caused
by the continuing loss of hydroxyapatite
crystals. The association of topical
acidulated phosphate fluoride application
(APF) and high intensity lasers has the
potencial to increase the resistance
to demineralization of dental tissues.
The Nd:YAG laser, specially associated
to a photoabsorber over the dental
surface, may induce thermal changes
in order to increase the resistance to
demineralization. Optical Coherence
Tomography (OCT) is a non-ionizing
radiation imaging technique that can
be performed in real time in vivo and
can detect early changes in the optical
properties of t issues. This study aimed
to characterize the effectiveness of the
association of Nd:YAG la ser and APF
gel in the prevention of caries lesions
in human dental enamel in vitro, due to
structural changes in function of the pH
cycling, the treatments performed as
well as to evaluate the potential of OCT
to diagnose early demineralization. 160
human enamel samples were divided in
four groups and submitted to pH cycling
during 20 days, after the following
treatments: G1- untreated; G2- treated
with APF gel (1.23% F-, 4min); G3-
irradiated with Nd:YAG (1064nm, 84.9J/
cm2, 10Hz) followed by APF application
and G4- APF application before Nd:YAG
laser irradiation (same conditions of G3).
OCT (930 nm) analysis were performed
before and after the treatments, 5th,
10th, 15th and 20th day of pH cycling.
The optical attenuation coefficient
decreased significantly (p<0.05) as
demineralization increased over time
and better results were achieved in group
G4. OCT technique can diagnose early
demineralization in enamel.
Como referenciar
MORAES, MARCIA C.D.; PEREIRA, DAISA L.; ZAMATARO, CLAUDIA B.; ZEZELL, DENISE M.; FREITAS, ANDERSON Z. Effect of Nd:YAG laser on caries prevention of dental enamel by optical attenuation coefficient with optical coherence tomography (OCT). In: LASER DENTISTRY WORLD CONGRESS, 16th; DGL ANNUAL MEETING, 27th; INTERNATIONAL WALED CONGRESS, 6th, October 1-3, 2018, Aachen, Germany. Abstract... Aachen, Germany: International Society for Laser in Dentistry, 2018. p. 48-48. Disponível em: http://repositorio.ipen.br/handle/123456789/32777. Acesso em: 22 Feb 2025.
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.