13th World Congress for Laser Dentistry

26-28, April 2012

Barcelona, Spain

Meeting Abstract

Sponsors: World Federation for Laser Dentistry

-  Poster 73

TITLE: Sound deciduous enamel demineralization after Light-Emitting Diodes irradiation and photoabsorbing cream 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):S221.

* doi:10.4317/medoral.17643721

http://dx.doi.org/10.4317/medoral.17643721

Abstract

Dental caries is the most prevalent oral disease. This study aimed to investigate whether LED associated with photoabsorbing cream induces changes in the sound enamel composition related with demineralization after cariogenic challenge using µ-EDX.

Samples of caries-free primary teeth (n = 32) were divided into: control (CTR), LED (λ = 470nm, 190mW/cm², 180 sec), cream (AO), cream and LED (AOL) groups. Samples had initial analysis, treated according to the protocols, submitted to pH-cycling cariogenic challenge (7 days), and then analyzed with µ-EDX.

There were significant differences between pre and post challenge with the increasing of calcium in AO and AOL and reduction in LED, the latter also showed a reduction of phosphorus (p = 0.0038). In organic balance only CTR and LED groups showed differences between moments, reduction and increase respectively. Analyzing Ca/P ratio, LED showed decrease, as well as for inorganic/organic ratio, denoting loss of inorganic components greater than organic post challenge. There was no significant difference between groups after challenge. Instrumentation with EDX is a suitable method for detecting changes in the composition of mineral phases of irradiated enamel under cariogenic challenge. The results suggest that the enamel treated with cream associated with the LED seems to have resistance to cariogenic challenge related with mineral components of sound deciduous tooth enamel.