Cavity pHighter testing strips measure the pH and buffer capacity in your saliva. The strips are best used after a meal when these levels may be low, indicating that acid levels are high. Excessive acid levels may increase your risk for cavities.
PH: pH measurements express the acidity or alkalinity of an aqueous solution such as saliva. The range goes from 0 to 14, with 7 being neutral. Solutions with pH of less than 7 are acidic; with pH greater than 7 are alkaline.