Influence of photo-activation source on enamel demineralization around restorative materials
Braz. oral res
;
27(3): 286-292, May-Jun/2013. tab, graf
Article
in English
| LILACS
| ID: lil-673239
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.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Tooth Demineralization
/
Composite Resins
/
Dental Enamel
/
Curing Lights, Dental
/
Glass Ionomer Cements
Type of study:
Evaluation studies
Limits:
Humans
Language:
English
Journal:
Braz. oral res
Journal subject:
Dentistry
Year:
2013
Type:
Article
/
Project document
Affiliation country:
Brazil
Institution/Affiliation country:
Univ Guarulhos - UnG/BR
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