Fluorescence adds to the vitality of a restoration and mini-
mizes the metameric effect between the teeth and restoration
[8]
.
Several commercial resin composites are claimed by the
manufacturers to have tooth-like fluorescence. Some com-
mercial resin composite showed fluorescence and others did
not
[1]
.Fluorescentemissionwasdeterminedbythedifference
inspectralreflectancevalues,whichweremeasuredunderthe
UV-included and excluded conditions of the illuminant D65
[1]
. And also, the influence of surface sealant and staining on
the fluorescent emission of resin composites was determined
[9]
. If fluorescent emission of a resin composite is increased,
higher masking and brightening effect can be obtained
[10]
.
Cerium oxide was added to impart fluorescence to den-
tal porcelain
[11]
. In case of resin composite, fluorescent glass
filler containing rare earth oxides was added into resin com-
posite to enhance fluorescence
[12]
. However, it has not been
reported on the influence of fluorescent agent directly added
in the resin matrix.
Fluorescent whitening agents (FWAs) are chemicals added
to most fabrics and papers during manufacture to increase
colortemperature,‘whiteness’,and‘brightness’.FWAsaccom-
plish this by absorbing energy in the UV part of the spec-
trum and emitting it as visible blue light
[13]
. FWA did not
penetrate into the subepithelial layers of the skin after cuta-
neous application
[14]
, and it was concluded that the pos-
sibility of systemic toxic effects in man as a result of per-
cutaneous absorption of FWA was remote
[15]
. It was also
reportedthatnoneoftheFWAswasphototoxic
[16]
.Therefore,
FWA was considered as a possible fluorescent agent, which
can be added into dental resin composite to give fluorescent
properties.
The null hypothesis of the present study was that the con-
centration of FWA added into resin composites did not influ-
ence the fluorescent emission. The purpose of this study was
to determine the difference in the fluorescent emission of
experimental dental resin composites after addition of FWA in
varied concentrations. The effects of thermocycling and com-
position of resin matrix on the fluorescent emission were also
determined
Fluorescence adds to the vitality of a restoration and mini-mizes the metameric effect between the teeth and restoration[8].Several commercial resin composites are claimed by themanufacturers to have tooth-like fluorescence. Some com-mercial resin composite showed fluorescence and others didnot[1].Fluorescentemissionwasdeterminedbythedifferenceinspectralreflectancevalues,whichweremeasuredundertheUV-included and excluded conditions of the illuminant D65[1]. And also, the influence of surface sealant and staining onthe fluorescent emission of resin composites was determined[9]. If fluorescent emission of a resin composite is increased,higher masking and brightening effect can be obtained[10].Cerium oxide was added to impart fluorescence to den-tal porcelain[11]. In case of resin composite, fluorescent glassfiller containing rare earth oxides was added into resin com-posite to enhance fluorescence[12]. However, it has not beenreported on the influence of fluorescent agent directly addedin the resin matrix.Fluorescent whitening agents (FWAs) are chemicals addedto most fabrics and papers during manufacture to increasecolortemperature,‘whiteness’,and‘brightness’.FWAsaccom-plish this by absorbing energy in the UV part of the spec-trum and emitting it as visible blue light[13]. FWA did notpenetrate into the subepithelial layers of the skin after cuta-neous application[14], and it was concluded that the pos-sibility of systemic toxic effects in man as a result of per-cutaneous absorption of FWA was remote[15]. It was alsoreportedthatnoneoftheFWAswasphototoxic[16].Therefore,FWA was considered as a possible fluorescent agent, whichcan be added into dental resin composite to give fluorescentproperties.The null hypothesis of the present study was that the con-centration of FWA added into resin composites did not influ-ence the fluorescent emission. The purpose of this study wasto determine the difference in the fluorescent emission ofexperimental dental resin composites after addition of FWA invaried concentrations. The effects of thermocycling and com-position of resin matrix on the fluorescent emission were alsodetermined
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