Veneers are a synthetic material, or
man-made. Similar to that of a crown or
composite filling. If you tried to bleach
natural teeth adjacent to artificial ones,
only the natural teeth would whiten. I
would presume that the same would occur
with veneers, and the whitening material
would have no effect. If you plan on
whitening, I would suggest that you have
your veneers made a few shades whiter than
the teeth adjacent to them, and then match
the natural teeth with a whitening agent
later.
