The Complex Smile This smile is rare because it requires three muscle groups to work simultaneously when smiling. If you have this smile, the two muscles used in the cuspid and commissure and the lower lip will pull downward, resulting in a double chevron shape.

Strong teeth should be firm and not loose or shaky to the touch, and they should also be able to chew any foods without causing you discomfort or pain. One of the most common signs of poor tooth health is having a cavity, crack, or irregular bump on the surface.

Studies show that poor oral health is linked to heart disease, diabetes, pregnancy complications, and more, while positive oral health can enhance both mental and overall health.

Your mouth can tell you a lot about the health of your body. The mouth shows signs of tooth decay, gum disease and other oral health problems. It can also show signs of other disease, if you're missing certain foods from your diet and unhealthy habits such as using tobacco and tobacco-like products, and alcohol.