4. Discussion
The null hypothesis of the present study was rejected because
fluorescent emission increased as the concentration of the
FWA increased. Thermocycling up to 1000 cycles did not influ-
ence the fluorescent emission. In addition, the amount of flu-
orescent emission was influenced by the type of resin matrix.
FWA added experimental resin composites of the present
study emitted higher fluorescence than commercial resin