They do not replace your toothbrush but do have many benefits.
1. Apples are also known as nature's toothbrush. Apples have a high water content and dilutes the effects of sugars it contains. They stimulate the flow of saliva protecting against decay and buffering acids.
2. Apples make you feel fuller. Snack apples and prevent yourself from eating pies, cookies, candies, muffins etc.
3. Skin! Besides just helping your skin, the skin of an apple is high in fiber and scrubs your teeth helping remove stains and fight plaque.
4. Apples help you get rid of bad breath. The acidity of the apple helps you kill certain bad bacteria that may be causing the bad breath.