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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of photo-activation source on enamel demineralization around restorative materials

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Author(s):
Juliana de Oliveira Ferla [1] ; José Augusto Rodrigues [2] ; César Augusto Galvão Arrais [3] ; Ana Cecília Correa Aranha [4] ; Alessandra Cassoni [5]
Total Authors: 5
Affiliation:
[1] Univ Guarulhos - UnG. Graduate Division. Department of Restorative Dentistry - Brasil
[2] Univ Guarulhos - UnG. Dental Research Division. Department of Restorative Dentistry - Brasil
[3] Univ Estadual de Ponta Grossa - UEPG. Graduate Division. Department of Restorative Dentistry - Brasil
[4] Univ de São Paulo - USP. School of Dentistry. Department of Restorative Dentistry - Brasil
[5] Univ Guarulhos - UnG. Dental Research Division. Department of Restorative Dentistry - Brasil
Total Affiliations: 5
Document type: Journal article
Source: Brazilian Oral Research; v. 27, n. 3, p. 286-292, 2013-03-01.
Abstract

This study evaluated the effects of the photoactivation source and restorative material on the development of caries-like lesions on human enamel after an in vitro pH challenge. Enamel cavities were prepared in 36 blocks, which were assigned to two groups according to the restorative material: resin-modified glass ionomer (RMGI) and composite resin (CR). Samples were exposed to quartz-tungsten-halogen lamp, argon-ion laser, or light-emitting diode (n = 6). The Knoop microhardness (KHN) values of the top surface of all materials were evaluated. Restored enamel blocks were thermocycled and subjected to 10 demineralization-remineralization cycles at 37°C. KHN analysis of the superficial enamel was performed by four indentations located 100 mm from the restoration margin. The material KHN was not affected by the photoactivation source. No significant difference in KHN was noted between CR and RMGI. The enamel surface around RMGI exhibited a higher KHN (272.8 KHN) than the enamel around CR (93.3 KHN), regardless of the photoactivation source. Enamel demineralization around the dental restoration was not influenced by the photoactivation source. Less enamel demineralization was observed around the RMGI than around the CR restoration. (AU)

FAPESP's process: 09/02240-3 - Visual and quantitative analysis of the cariostatic potential and microhardness of resin composite and resin modified glass ionomer activated by argon ion laser compared to halogen light and LED
Grantee:Alessandra Cassoni Ferreira
Support Opportunities: Regular Research Grants