Proper brushing comes down to angle, motion, timing, and consistency. The American Dental Association recommends brushing twice a day for at least two minutes each session, using fluoride toothpaste and a 45-degree angle against the gumline. Most people brush for well under two minutes and use a scrubbing motion that misses the areas where plaque actually builds up. Here’s how to do it right.
The 45-Degree Technique
The most widely recommended approach is called the Modified Bass technique. Hold your toothbrush so the bristles point at a 45-degree angle toward your gumline, not straight against the flat surface of your teeth. From that position, make short back-and-forth strokes (about one tooth wide), then sweep the brush away from the gumline toward the biting edge of the tooth. This pulls plaque and debris out from under the gum margin, which is the spot where gum disease starts.
Work through your mouth in a consistent pattern so you don’t skip areas. A common approach: start on the outer surfaces of your upper teeth from one side to the other, then do the inner surfaces. Repeat for the bottom teeth. For front teeth, tilt the brush vertically and use the toe of the brush head to reach behind them. Finish with the chewing surfaces using a simple back-and-forth motion. The whole process should take a full two minutes. If that feels long, set a timer a few times until you calibrate your sense of it.
Choosing a Toothbrush
Both manual and electric toothbrushes work, but electric brushes consistently outperform manual ones when researchers test them head to head. In one eight-week trial, 82% of people using an oscillating-rotating electric toothbrush had healthy gums (fewer than 10% of sites bleeding) by the end of the study, compared to just 24% of manual brush users. The electric brush also removed significantly more plaque after a single use and maintained that advantage throughout the study period.
If you use a manual brush, choose one with soft bristles. Medium and hard bristles don’t clean better and can damage enamel and irritate gums over time. A small brush head makes it easier to reach your back molars. If you use an electric brush, the same soft-bristle rule applies to the replacement heads.
Whichever type you use, replace your toothbrush or brush head every three to four months. If the bristles look frayed or matted before that, swap it out sooner. Worn bristles lose their ability to clean effectively.
What to Look for in Toothpaste
The single most important ingredient in toothpaste is fluoride. Standard fluoride toothpastes in the United States contain 1,000 to 1,100 parts per million (ppm) of fluoride, which is effective for most adults. Toothpastes with 1,500 ppm fluoride are slightly more effective at preventing cavities and may benefit people at higher risk for decay, though they’re not available everywhere.
Beyond fluoride, pay attention to abrasiveness. Toothpastes are rated on a scale called Relative Dentin Abrasivity (RDA). Products with an RDA of 0 to 70 are gentle enough for sensitive teeth and daily use. An RDA of 71 to 100 is still safe for everyday brushing. Whitening toothpastes often sit at the higher end of this range or above it, so if you have sensitive teeth or thinning enamel, check before committing to one long-term.
When to Brush (and When to Wait)
Twice a day is the baseline: once in the morning and once before bed. The bedtime session is especially important because saliva production drops while you sleep, giving bacteria hours of uninterrupted activity if plaque is still on your teeth.
If you eat breakfast before brushing in the morning, wait at least 30 minutes before you pick up your toothbrush. Acidic foods and drinks like orange juice, coffee, and fruit temporarily soften your enamel. Brushing while enamel is in that softened state can wear it away. Rinsing your mouth with plain water right after eating helps neutralize acid in the meantime. Alternatively, brush before breakfast and skip the wait entirely.
Floss Before You Brush
Research suggests flossing before brushing is more effective than the reverse order. A clinical study found that flossing first did a better job of reducing certain types of plaque, likely because it clears debris from between teeth and opens up those surfaces for fluoride to reach them during brushing. Think of it as clearing the path so the toothpaste can actually contact the enamel.
That said, the order matters far less than the habit itself. If you’ll only floss after brushing, that’s still vastly better than not flossing at all.
Don’t Skip Your Tongue
Your tongue harbors a large share of the bacteria responsible for bad breath. Cleaning it should be part of your routine. You can use your toothbrush, but a dedicated tongue scraper is roughly twice as effective: studies show tongue scraping removes about 75% of tongue coating, while a toothbrush manages around 40%. Either way, work from the back of the tongue forward with gentle pressure. There’s no need to scrub hard.
Common Mistakes That Undermine Good Technique
- Brushing too hard. Aggressive pressure doesn’t remove more plaque. It wears down enamel and can cause gums to recede, exposing sensitive root surfaces. Let the bristles do the work with light, consistent pressure.
- Rushing through it. Most people brush for about 45 seconds. That’s less than half the recommended two minutes and leaves large portions of the mouth untouched.
- Using the same starting point every time. People tend to brush most thoroughly at the beginning and get sloppy toward the end. Rotate your starting point so the same teeth don’t always get the least attention.
- Rinsing with water immediately after. Spitting out excess toothpaste is fine, but rinsing with water washes away the fluoride before it has time to strengthen your enamel. If you use mouthwash, use it at a separate time from brushing for the same reason.
- Neglecting the gumline. The junction where tooth meets gum is where plaque causes the most damage. If your bristles never angle toward that margin, you’re missing the most important target.