The toothbrush aisle has become surprisingly complicated. There are brushes with angled heads, rubber flaps, charcoal bristles, timers, apps and price tags that range from one dollar to three hundred. The good news is that dentists agree on a short list of things that matter. Everything else is mostly marketing.
1. Choose soft bristles
This is the one rule almost every dentist repeats. Soft bristles clean well without wearing down enamel or irritating your gums. Medium and hard bristles can cause gum recession and tooth wear over time, especially if you brush hard, and many of us do. The American Dental Association recommends a soft-bristled brush for most people. See the ADA's consumer site for its toothbrush advice.
If your gums bleed when you brush, do not switch to a harder brush. Bleeding is usually a sign of gum inflammation, and gentle, regular brushing and flossing usually help. If it lasts more than a couple of weeks, see your dentist.
2. Pick a head size that fits your mouth
A brush head that is too big makes it hard to reach the back teeth and the inside surfaces. For most adults, a head about half an inch wide and an inch tall works well. If you have a small mouth or crowded teeth, go smaller. The handle should feel comfortable and easy to grip. People with arthritis or limited hand strength often do better with a thicker handle or a powered brush.
3. Manual or electric? Both work
Here is the honest answer: a manual brush used well for two minutes twice a day does a fine job. That said, a large review of studies by the Cochrane Collaboration found that powered brushes, especially the rotating-oscillating kind, removed somewhat more plaque and reduced gum inflammation a bit more than manual brushes over time.
An electric brush may be worth it if you:
- Tend to rush or brush unevenly
- Have arthritis or limited hand movement
- Wear braces
- Like the built-in two-minute timer and pressure warning
You do not need the most expensive model. A basic electric brush with a timer offers most of the benefit. The bells and whistles, like app tracking and many cleaning modes, are nice but not necessary.
4. Look for the ADA Seal
The ADA Seal of Acceptance on a toothbrush means the company has shown it is safe and effective, and that the bristles and handle hold up under normal use. It is a quick shortcut in a crowded aisle, much like a USP or NSF seal on a supplement.
When to replace it
Replace your toothbrush, or your electric brush head, every three to four months, or sooner if the bristles are frayed. Worn bristles clean poorly. Many people also replace their brush after a cold or flu, which is reasonable, though the main reason is wear.
Care tips:
- Rinse it well after each use.
- Store it upright and let it air dry.
- Do not cover it or keep it in a closed container while wet, which encourages bacteria.
- Do not share toothbrushes.
Brushing basics that matter more than the brush
- Brush twice a day for two minutes with fluoride toothpaste.
- Hold the brush at a slight angle toward the gumline and use short, gentle strokes.
- Clean between your teeth once a day with floss, picks or a water flosser.
- Do not rinse away all the toothpaste. Spitting without a big rinse leaves fluoride on your teeth.
- See your dentist regularly for cleanings and checkups.
The foods and nutrients your mouth needs
What you eat matters as much as how you brush. Here is what helps.
Cut back on how often you have sugar
Cavities are caused by bacteria that feed on sugar and starch and produce acid. How often you have sugar matters more than how much. Sipping soda or juice all afternoon, or snacking on sweets through the day, keeps your teeth bathed in acid. If you have something sweet, have it with a meal and drink water afterward. The CDC has more on protecting your teeth.
Calcium and vitamin D
Your teeth and the jawbone that holds them need calcium, and vitamin D helps you absorb it. Dairy, fortified plant milks, canned fish with bones, tofu made with calcium and leafy greens are all good sources. See calcium and bone health and how much vitamin D you should take.
Vitamin C for your gums
Vitamin C helps keep gum tissue healthy. Severe deficiency, called scurvy, causes swollen, bleeding gums. It is rare today, but low intake is more common than you might think in people who eat few fruits and vegetables. See orange juice vs vitamin C supplements.
Crunchy fruits and vegetables
Apples, carrots and celery get your saliva flowing, and saliva is your mouth's natural defense against acid.
Water
Water with fluoride, where your community provides it, is one of the simplest ways to protect your teeth.
A word on supplements for teeth
You will see chewables and gummies marketed for teeth and gums. Most simply contain calcium and vitamin D, which you can get elsewhere. Gummy vitamins themselves are sticky and often contain sugar, which is not ideal for teeth. If you take them, take them with a meal and brush afterward. See how supplements are regulated to understand why claims on these products are not reviewed in advance.
The bottom line
Choose a soft-bristled brush that fits your mouth, replace it every three to four months, and use it for two minutes twice a day with fluoride toothpaste. An electric brush can help, but it is not essential. Limit how often you have sugar, eat your fruits and vegetables, and get enough calcium and vitamin D.