A LOOK AT TOOTHBRUSHES
Toothbrush design and materials have come a long way. Early forms of the toothbrush have existed for nearly 5000 years. Some ancient civilizations removed food with a "chew stick," which was a thin twig with a frayed end that was rubbed against the teeth. During the last century or so, toothbrushes were crafted with bone, wood or ivory handles that held the stiff bristles of hogs, boars or other animals. The nylon-bristled toothbrushes we use today were invented in 1938.
What kind of toothbrush should you choose?
There are two types of toothbrushes: manual and powered. The size and shape of the brush should fit your mouth comfortably, allowing you to reach ...