Consider the following examples of two different types of statistical investigations. Example 1 Radio rating services sometimes collect data on listenership by asking participants to record the date, time, and station each time they listen to the radio.
Popular types of invisible braces include ceramic brackets, inside braces and clear aligners. Ceramic braces are just like metal braces, except that they use tooth-colored brackets (and sometimes tooth-colored wires) rather than metal to straighten teeth.
The 4 Main Types of Braces Metal Wire Braces. This is the most basic type of braces. Metal wire braces are sturdy and effective. However, because theyâre metal and run along the outside of your teeth, they are very noticeable anytime you open your mouth. Ceramic Braces