Another thing you can do to try and stave off gum disease is be very careful with what you drink. Fruit juice is absolutely terrible for your teeth and gum health. It's basically swirling acid and sugar through them, it softens them and encourages the bacteria. I read an article which said it was even worse than drinking soda.
If you must drink fruit juice you're better off using a straw, and you should drink quickly, so they don't sit in your mouth longer than they have to.