Maintaining a healthy and neutral oral pH on tooth surfaces is critical for supporting enamel health. Teeth should not be exposed to pH values below 5.5 for extended periods.
The pH scale measures acidity (acid) and alkalinity (base). The pH scale ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic.
There are many factors that can affect the pH on tooth surfaces such as diet, dry mouth (xerostomia) and Gerd (Gastroesophageal reflux disease).