1. The idea is that the calcium rebuilds the tooth by plugging microscopic gaps in the enamel.
2. A new toothpaste promises to end the agony of sensitive teeth by rebuilding tooth enamel.
3. Bacteria found in plaque changes sugars into acids, which erodes the tooth enamel to form cavities.
4. Arm & Hammer's Enamel Care Sensitive is said to contain a liquid form of calcium, the key component in tooth enamel.
5. There is damage to the enamel on the crown of the tooth and on its surface.