13th World Congress for Laser Dentistry

26-28, April 2012

Barcelona, Spain

Meeting Abstract

Sponsors: World Federation for Laser Dentistry

-  Poster 74

TITLE: Enamel demineralization assessment of carious deciduous tooth after irradiation with LEDs and photoabsorbing cream using X-Ray dispersive energy.

AUTHORS: de Sant'Anna GR, de Almeida WR, Vasconcelos FF, dos Santos EAP, Brugnera Jr. A, Duarte DA, Martins AA, do Espírito-Santo AM.

Cruzeiro do Sul University; Vale do Paraíba University; Institute of Biomedical Engineering, LEVB ; Camilo Castelo Branco University

SOURCE: Med Oral Patol Oral Cir Bucal. 2012 May 1;17(Supplement1):S222.

* doi:10.4317/medoral.17643722

http://dx.doi.org/10.4317/medoral.17643722

Abstract

Dental caries results from an ionic imbalance resulting a white spot lesion.

Our aim was to investigate changes in carious enamel composition after LED associated with photoabsorbing cream treatment and new cariogenic challenge µ-EDX.

Samples of pH-cycling carious primary teeth (n = 32) were divided into: control (CTR), LED (λ = 470nm, 190mW/cm², 180 sec), cream (AO), cream + LED (AOL). Samples were analyzed after initial pH-cycling, treated according to the protocols for each group and submitted to a new pH-cycling (7 days) and then analyzed with EDX.

There was a Ca reduction, between moments in CTR and AO groups, while LED and AOL groups showed an increase, not significant. CTR and AO groups demonstrated phosphorus reduction while in AOL increased.

It was observed differences in Ca in CTR and AOL in the second cariogenic challenge; for phosphorus in CTR, LED and LED CREAM, for organic balance in CTR and AOL, for Ca/P ratio CTR, LED, CREAM and CREAM LED, and inorganic/organic ratio cream, CTR and LED.

The results suggest that carious enamel treated with cream and LED seems to resist to cariogenic challenge related with mineral components of deciduous tooth enamel.