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.
Cavities are the holes that tooth decay makes in the teeth.From this chapter, you can learn: â¢ When to fill the cavity, or when to take out the tooth. â¢ How to place a temporary cement filling. â¢ How to place a permanent filling using Atraumatic Restorative Treatment (ART).avities are the holes that tooth decay makes in the teeth.From this chapter, you can learn: â¢ When to fill the cavity, or when to take out the tooth. â¢ How to place a temporary cement filling. â¢ How to place a permanent filling using Atraumatic Restorative Treatment (ART).