Brian,
I know you're looking for someone to say " you need to dip for (fill in the number...as long as it's more than you've dipped for) years before you're at risk"

No one can, or will. It just doesn't work that way. I was a smoker, and that undoubtedly contributed to my cancer. That said there are many who have never smoked or dipped who suffer from oral cancer.

Losing the tobacco habit is tough...but not nearly as hard as it is waking up after surgery not knowing if you have a jaw left, or not.

Quitting won't guarantee anything; you may still develop cancer. One in three people are affected by this disease in one way or another. It is the smart thing, and the healthy thing to do, though.

Talk to your doctor, and get some professional help with kicking the tobacco habit. You WILL be glad you did
Good Luck!
Wayne