GREENSBORO, N.C. -- Monday was National Dentist's Day.

2 Wants To Know did some Fact Or Fiction when it comes to taking care of your teeth.

Fact: You need to replace your tooth brush every three months. When the bristles get old and frayed, they don't hit the right parts of your teeth.

Fact Or Fiction: A good tooth brushing lasts about 1 minute.

Fiction: The recommended brushing time is 2 minutes.

another thing to remember: Don't grip the brush and scrub your teeth. That could do more damage to your gums. Brush your teeth gently.