Brush your teeth twice a day for two minutes each time, using a soft-bristled toothbrush and fluoride toothpaste. That’s the baseline recommendation from the American Dental Association, and it’s the single most effective thing you can do for your oral health. But the way you brush matters just as much as how often you do it.
The Best Brushing Technique
The most widely recommended method is called the modified Bass technique. Hold your toothbrush at an angle so the bristles point toward your gum line, not straight against the flat surface of your teeth. Make short back-and-forth strokes, then sweep the brush away from your gums toward the biting edge of the tooth. This motion pulls plaque out from under the gum line rather than just pushing it around on the tooth surface.
Work through your mouth in a consistent order so you don’t miss any spots. A simple system: start with the outer surfaces of your upper teeth, move to the inner surfaces, then do the chewing surfaces. Repeat for the lower teeth. For front teeth, tilt the brush vertically and use the toe of the brush head to make up-and-down strokes along the inner surfaces, which are easy to skip.
Two minutes feels longer than you’d expect. Most people brush for about 45 seconds without realizing it. A timer on your phone or a built-in timer on an electric toothbrush helps you stay honest.
Why Soft Bristles Matter
Always choose a soft-bristled brush. Hard bristles can cause gum recession surprisingly fast, pushing your gum tissue down and exposing the roots of your teeth. The root surface isn’t protected by enamel. Instead, it’s covered by a much thinner, weaker layer called cementum. Once cementum wears away from aggressive brushing, the tooth becomes sensitive to cold and is more prone to cavities.
The progression is predictable: brushing too hard leads to receding gums, which exposes roots, which leads to sensitivity and worn-down areas that trap plaque. If your toothbrush bristles are splayed and frayed well before the three-month mark, that’s a sign you’re pressing too hard. Let the bristles do the work. You’re cleaning, not scrubbing a pan.
Electric vs. Manual Toothbrushes
Both work. But electric toothbrushes do have a measurable edge. A large Cochrane Review found that electric toothbrushes removed about 21% more plaque and reduced gum inflammation by 11% compared to manual brushes over three or more months of use. The advantage likely comes from the consistent motion and built-in timers that keep you brushing longer and more evenly.
If you brush well with a manual toothbrush, there’s no urgent reason to switch. But if you tend to rush, press too hard, or have dexterity issues, an electric brush can compensate for inconsistent technique.
Choosing the Right Toothpaste
The active ingredient that matters most is fluoride. Standard toothpaste in the U.S. contains 1,000 to 1,100 parts per million (ppm) of fluoride, which is effective for most adults. If you’re at higher risk for cavities, toothpaste with 1,500 ppm fluoride offers extra protection.
For children under six, stick with toothpaste in the 1,000 ppm range but use only a smear (rice-grain size) for kids under three and a pea-sized amount for ages three to six. Higher-fluoride formulas aren’t recommended for young children because they tend to swallow toothpaste. Low-fluoride children’s toothpastes (around 500 ppm) exist but are slightly less effective at preventing cavities than the standard concentration.
What to Do After You Brush
Spit out the toothpaste, but don’t rinse your mouth with water. This is a shift from what most people grew up doing. When you rinse immediately after brushing, you wash away the fluoride that’s sitting on your teeth and doing its job. Spitting without rinsing keeps that protective layer in contact with your enamel longer, and it’s been shown to reduce cavities. International dental organizations now recommend this as standard practice.
If you’ve eaten or drunk something acidic, like citrus fruit, tomato sauce, or soda, wait at least 30 minutes before brushing. Acid temporarily softens your enamel, and brushing in that window can wear it down. Rinsing with plain water right after an acidic meal is fine and helps neutralize the acid faster.
Flossing and Tongue Cleaning
Brushing only reaches about 60% of your tooth surfaces. The sides of your teeth, where they press against each other, need flossing or an interdental brush. You can floss before or after brushing. Either order works. What matters is that you do it daily.
Tongue cleaning is optional for most people. Your tongue’s textured surface harbors bacteria that contribute to bad breath, and scraping or brushing it can help. But if you’re brushing twice a day and your breath is fine, you don’t need to add it to your routine. For persistent bad breath, a dedicated tongue scraper is worth trying.
When to Replace Your Toothbrush
Swap your toothbrush (or electric brush head) every three to four months. Frayed bristles don’t clean effectively and can irritate your gums. Replace it sooner if the bristles are visibly splayed, if you’ve been sick with something like the flu or strep throat, or if the brush has been contaminated (dropped on a bathroom floor, chewed by a pet, left in a closed travel case for too long).
Store your toothbrush upright and let it air dry between uses. Covering it or sealing it in a container creates a moist environment where bacteria thrive.