This is just a great news for people suffering from tooth decay and cavities as the scientists at the University of California have found out a very simple treatment to fill enamels and treat cavities. This is as simple as brushing your teeth. You heard it right! The scientists claim that the compound could be added to your toothpaste and mouthwashes. Dentists welcomed the product and called as 'promising and interesting'. Erosion of enamel (hardest tissue in the human body) could lead to yellowing of teeth and sensitivity. Cavities are caused due to the build-up of plague, which is formed by bacteria. The acids found in the plague remove minerals and decay the enamel and dentin.