Tooth sensitivities and enamal loss on a raw diet are caused by eating too much fruit, especially acid fruit. You can correct or prevent this by eating lots of greens and limited amounts of fruit, 3 to 5 pieces a day is fine. Some people have even corrected tooth decay by eating a raw diet with tons of greens. You should be eating about two big bunches of greens a day, you can juice them, eat them as salads or make them into smoothies.