Now that soft drinks are sold in almost all public and private schools, dentists are noticing a condition in teenagers that used to be found only in the elderly-a complete loss of enamel on the teeth, resulting in yellow teeth. The culprit is phosphoric acid in soft drinks, which causes tooth rot as well as digestive problems and bone loss. Dentists are reporting complete loss of the enamel on the front teeth in teenaged boys and girls who habitually drink sodas.
Normally the saliva is slightly alkaline, with a pH of about 7.4. When sodas are sipped throughout the day, as is often the case with teenagers, the phosphoric acid lowers the pH of the saliva to acidic levels. In order to buffer this acidic saliva, and bring the pH level above 7 again, the body pulls calcium ions from the teeth. The result is a very rapid depletion of the enamel coating on the teeth. When dentists do cosmetic bonding, they first roughen up the enamel with a chemical compound-that chemical is phosphoric acid! Young people who must have all their yellowed front teeth cosmetically bonded have already done part of the dentist’s job, by roughening up the tooth surface with phosphoric acid.