Paul J. Ravin, D.D.S.

Humans have four different types of teeth, which all have different tasks. Incisors, the teeth at the front of your mouth, are used to take bites of food. Canines, your sharpest teeth, are used to rip and tear food apart. Premolars and molars are used for chewing and grinding food.

While types of whitening systems work, they produce different results. Most at-home kits can whiten as many as three shades lighter. Dentist provided at-home kits sometimes whiten as many as eight shades lighter. Professional treatments can whiten teeth as many as 14 shades lighter.

While years ago patients only had a few choices when it came to whitening their teeth, today there are a number of products and options available in a wide price range that will effectively address a variety of stains.

To achieve basic minimum oral health, do these things: Brush at least twice a day. Floss daily. Eat a healthy, diverse diet. Limit sugary drinks and between-meal snacks. Schedule regular dental checkups once or twice a year.