Hi Lynn,

My daughter has white streaks on her teeth...so I'm not sure if I'm talking about what you are talking about.....but my dentist said it was because she had had a really high fever and the fever did it to her.

But someone else told me it was the antibiotic that she took (at that time) that left the white streaks. And I did some research on antibiotics and this was one of the side effects.

I've read about how mercury causes tattooing (in the mouth and soft tissue) and it's usually dark streaks.

You could do some research on flouride and see if it could possibly be that.