From
http://www.deltadentalwa.com/oralhealth/o_1_7.htm
FromFrequent snacking speeds up the destruction of teeth. Whenever the cavity-causing bacteria on your teeth come into contact with food or drinks containing sugar or starches, the bacteria feed upon the sugars and produce acids that dissolve the protective surface of the teeth.
http://www.nlm.nih.gov/medlineplus/ency ... 001055.htm
FromFrequent snacking increases the time that acids are in contact with the surface of the tooth.
http://www.aapd.org/publications/brochures/snacking.asp
A food with sugar or starch is safer for teeth if it's eaten with a meal, not as a snack.