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.
Although cavities are most common for children and young adults, basically anyone with teeth is susceptible to getting cavities, no matter what the age. To keep your teeth safe, here youâll find out what you need to know about the formation, treatment, and prevention of cavities. How Are Cavities Formed? The culprits behind tooth decay are bacteria and food. Cavities form over time leading to tooth decay. According to Mayo Clinic, hereâs how that process happens: Plaque Forms