1. Introduction
Ideal esthetic restorative materials should have similar fluo-
rescence to that of teeth. If it is absent, esthetic qualities of the
restorations suffer under UV illumination
[1]
. Since resin com-
posites are applied by layering to mimic the layering of natural
teeth and have become to be used for the restoration of large
areas
[2], fluorescence of resin composites is important as in
dental porcelains
[3]