Twist off the old head and snap on the new one

Replacing an Oral-B brush head takes about 30 seconds. Hold the handle in one hand and grip the brush head near the base with your other hand, then twist counterclockwise until it comes free. Drop it in the trash. Take a new Oral-B brush head, align the connector post on the handle with the slot on the new head, and push straight down until you hear or feel a click. The head is now locked in place and ready to use.

The click is your signal that the connection is find. If you don't hear it, pull the head off and try again—it may not be seated all the way. Once locked, the head should not wiggle or come loose during brushing.

Key Takeaways

  • Twist the old brush head counterclockwise to remove it from the handle.
  • Align the new head's connector post with the slot on your handle and push down until you hear a click.
  • The click confirms the head is locked and safe to use.
  • Replacement heads cost between $3 and $8 each depending on the type and where you buy them.
  • Most Oral-B handles accept multiple head styles, so you can switch between different brush types on the same handle.

Which brush head fits your handle

Oral-B makes several handle models, and not all brush heads fit all handles. The most common handles are the Pro, Pro 2, Pro 3, Smart, and iO series. Check the model number on the back or bottom of your handle—it usually starts with "DB" or "iO"—then look for replacement heads labeled for that model.

If you don't have the model number, take a photo of your handle and bring it to a drugstore or supermarket pharmacy. Staff can match it to the correct replacement heads in stock. You can also search the model number on Oral-B's website, which lists all compatible heads for that handle.

Some heads are universal across multiple models—the packaging will say "fits all Oral-B handles" or list several compatible models. These are a safe choice if you own more than one Oral-B toothbrush or plan to upgrade your handle later.

Common mistakes that break the connection

The most frequent error is twisting the new head too hard when installing it. You only need to push down until you feel the click—there is no need to twist it on. Forcing it can crack the connector post on the handle or strip the threads on the head, and then neither will work with future replacements.

Another mistake is not twisting the old head far enough to remove it. If it feels stuck, grip it closer to the base where the plastic is thicker, and twist slowly rather than yanking. If it still won't budge after a full rotation, soak the handle in warm water for a minute to soften any mineral buildup, then try again.

Do not pull the head straight up without twisting first. This can damage the connector post inside the handle. Always twist counterclockwise first, even if the head feels loose.

When to replace your brush head

Oral-B recommends replacing the brush head every three months, or sooner if the bristles are visibly frayed, bent, or discolored. Worn bristles clean less effectively and can irritate your gums. If you brush twice a day with normal pressure, three months is a realistic timeline.

If you brush harder than average or have gum sensitivity, replace the head every two months. If you brush once a day with light pressure, you may stretch it to four months. The bristles will tell you when they're done—they'll look thin and splayed rather than firm and upright.

Storing extra brush heads

Keep replacement heads in a cool, dry place away from direct sunlight. A bathroom cabinet or drawer works well. Do not store them in a sealed container while wet, as moisture can promote mold growth on the bristles. If you buy heads in bulk, leave them in their original packaging until you're ready to use them.

If a head sits unused for more than six months, rinse it under running water before installing it on your handle. Dust or dried toothpaste residue can interfere with the connection.

Where to buy replacement heads

Oral-B brush heads are sold at drugstores, supermarkets, big-box retailers, and online. Common retailers include CVS, Walgreens, Target, Walmart, and Amazon. Prices vary by location and retailer, but a single head typically costs $3 to $8. Buying a pack of two, three, or four heads usually costs less per head than buying one at a time.

Check the expiration date on the package before buying, especially if the box has been on the shelf for a long time. Bristles can harden over years of storage. If you order online, make sure the seller is authorized by Oral-B to avoid counterfeit heads, which may not fit correctly or may wear out faster.

Frequently Asked Questions

Can I use a non-Oral-B brush head on my Oral-B handle?

Some third-party heads are designed to fit Oral-B handles and cost less, but they may not click securely or may wear out faster. Stick with genuine Oral-B heads unless the third-party head explicitly states it fits your specific handle model. The connection is not worth risking.

What if the new head won't click into place?

Make sure you're pushing straight down, not at an angle. If it still won't click, the connector post on your handle may be damaged. Try a different new head to confirm. If multiple heads won't fit, the handle may need to be replaced. Contact Oral-B customer service with your handle model number for next steps.

Is it normal for the head to wiggle slightly after I click it on?

A tiny amount of movement is normal, but the head should not spin or come loose during brushing. If it wiggles excessively, remove it and reinstall it. If the problem persists, the handle connector may be worn and the handle may need replacement.

Can I clean and reuse an old brush head?

You can rinse an old head and let it dry, but the bristles will not recover their original firmness once they've frayed or bent. Reusing a worn head defeats the purpose of replacing it—you'll get less effective cleaning and may irritate your gums. Buy a fresh head instead.

Do I need to turn off my handle before replacing the head?

It's a good habit to turn off electric toothbrushes before removing or installing the head, but it's not strictly necessary. The motor will not damage the new head during installation. However, turning it off prevents accidental vibration while you're working and keeps water off your hands.