I find the Crest Whitestrips work quite well for most people.  They
won't perform miracles say if you have severe tetracycline stains that
are deeply embedded into the teeth, but they certainly can offer an
improvement in shade.  It also won't change the colour of fillings,
veneers, or crowns.

I haven't heard of any cases of taste alteration while using the
strips, but I'm sure any side effects largely are temporary and self-
resolving.

I do hear that light assisted bleaching isn't any more effective that
regular non-light assisted bleaching.  I think all the light might do
is speed up the chemical reaction from the light/heat energy, but
that's about it.  I hear it doesn't create any better results than
regular bleaching.

It's interesting to still see all those Zoom light bleaching systems,
etc still being advertised in the face of scientific evidence.  I
don't know if laser bleaching works, but maybe someone else can
comment on that.

Zzzdentist
www.dentalminds.com