In 1981, Reagan persuaded Congress to reduce the top tax rate form 70% to 50% and to index tax brackets (so that inflation was taken into consideration). In 1986, the Tax Reform Act reduced the rate on the wealthiest Americans to 28%.
Causes. Cavities are caused by tooth decay â a process that occurs over time. Here's how tooth decay develops: 1  Plaque forms. 2  Your mouth naturally contains many types of bacteria. 3  Some thrive on food and drinks that contain certain forms of sugar.
The only time cavities are forming is when the sugars and plaque is present for an extended amount of time, with this being the case every time you rinse, brush, or get your teeth clean you stop the process of tooth decay. However, the damage that was done while these were present doesnât wash or brush away.