Those pictures you see on the dentist's walls are worst case scenario when it comes to dip/chew. Those people NEVER brushed their teeth and more than likely also lived in an area with poor flouride content in their water.

I have been dipping for 15 years and I have to tell my dentist that I dip. He honestly cannot tell when I go in for my cleanings. That's because I move it around and don't keep it in the same spot every time I use it. I also brush/floss my teeth twice a day and use Listerine at the same time.

I know dip/chew is not healthy at all, but I just think it's funny when the first thing people resort to is a comment about dental hygiene.