America is a world leader in toothbrush technology. Walk through the oral hygiene aisle of a grocery store, and you'll discover many innovations: toothbrushes angled like dental tools, handles that bend and twist and change colors, bristles that are "specially shaped to reach between teeth"...the list goes on. And don't overlook those electric toothbrushes, some of which are powerful enough to take that knot out of your back after you're done with your teeth.

So many choices, so little consequence. When it comes to brushing, the brush itself is much less important than the person holding it, says Cynthia Sherwood, DDS, a family dentist in Independence, Kansas, and a spokeswoman for the Academy of General Dentistry. If you know how to brush your teeth properly, you won't need a fancy toothbrush to keep your teeth healthy, she says. Sherwood does recommend electric toothbrushes to many of her patients with gum disease, however. The extra vibration seems to help massage the gums and speed healing.

Whether you decide to go for straight or angled, manual or electric, fancy or plain, you should follow a few basic guidelines. The Academy of General Dentistry recommends choosing a toothbrush with a small head (about an inch long and a half-inch wide) and a long handle. Ideally, the brush should have soft, rounded bristles (choose one labeled "Soft"). Hard bristles won't get your teeth any cleaner, but they can wear down your teeth and damage your gums.

2. How often should I change my toothbrush?

Bent, frayed, or flattened bristles can't clean teeth very well, but they can be a haven for bacteria. Change your toothbrush every three to four months, or sooner if the bristles are no longer straight.

3. What kind of toothpaste?

As with toothbrushes, the type of paste you use isn't nearly as important as how well you use it. "I tell my patients that they can use any paste they want, as long as it contains fluoride, " Sherwood says.

4. How should I brush?

First of all, don't rush yourself. Unless you've had a mishap or extraction along the way, you have 32 teeth to clean. This is not a 10-second job. Place your toothbrush at a 45-degree angle along the gumline. Using a circular motion, gently rub your brush back and forth across every surface of your teeth -- the tops, the backs, the sides, the front. Don't forget to brush along the gumline and behind your back teeth.

5. When should I floss?

You should floss your teeth once every day, preferably before going to bed. Flossing removes hard-to-reach particles between teeth that can combine with bacteria to cause plaque and tartar. It's your best protection, along with daily brushing, against tooth decay, gum disease, and bad breath.

6. How exactly do I floss?

The American Dental Hygienists’ Association recommends these steps:

•Take 18 inches -- yes, 18 -- of floss and pinch it between your thumbs and index fingers, leaving a length of one to two inches in between.

•Keeping the floss taut, guide the floss between your lower teeth.

•Gently insert the floss between your teeth using a zig-zag motion, but avoid snapping it into your gum. Slide the floss up and down against the surface of the teeth and under the gumline.

•Use a clean section of floss for each tooth.

7. How long should I brush?

If your brushing takes less than two or three minutes, you're slacking -- and probably missing some spots. Brush at least twice a day, preferably right after a meal. Three times a day would be even better. Why not keep a toothbrush in your desk at work?

Three brushes a day, three minutes at a time -- that adds up to a whole nine minutes out of your day. You don't have any teeth to spare, so you might as well spare the time.