How to Replace Oral-B Brush Heads Correctly (All Models)
By Electric Toothbrushes, Floss, & Dental Health | Oral-B | Published: 2026-10-16
Category: Poradniki
A step-by-step guide to removing and fitting Oral-B brush heads on iO, Pro, and Smart series handles, with checkpoints to avoid the most common mistakes.
Quick answer
Pull the old head straight up off the handle, rinse and dry the metal shaft, then push the new head down until it seats fully with a small gap. For iO handles, align the head so it slides on freely; for Pro and Smart handles, line up the flat side of the shaft. If the head wobbles or sits flush against the handle, it is not seated correctly.
Before you start: match the head to your handle
Oral-B brush heads are not universal. iO series handles use iO-specific heads, while Pro, Smart, and most other rechargeable handles use the older push-on connection. Check the handle model printed on the base or in the app before ordering refills. If you are unsure, the Oral-B Brush Head Compatibility Guide on this site maps common handles to their heads.
Removing the old head without damaging the shaft
Grip the head firmly and pull it straight up. Do not twist or rock it side to side; that can bend the metal shaft or crack the plastic collar. If the head feels stuck, run warm water over the joint for a few seconds to loosen dried toothpaste, then pull again. Never use pliers or a tool to pry it off.
Fitting the new head: iO vs Pro/Smart
On iO handles, the head has a keyed opening that only fits one way. Rotate it until it drops on, then press down until you feel it click or stop. On Pro and Smart handles, align the flat side of the head opening with the flat side of the shaft and push down. In both cases, leave a small gap between the bottom of the head and the handle body; that gap is normal and means the head is fully seated.
Testing the fit and when to replace
Turn the handle on and watch the head. It should spin or vibrate without wobbling or rattling. If it wobbles, remove it and reseat it. Replace the head every three months, or sooner if the bristles are splayed. A worn head cleans less effectively even if it still fits.
Step-by-step replacement
- Power off and remove the old head: Turn the handle off, then grip the head and pull straight up. Common mistake: twisting or rocking the head, which can bend the shaft. If it will not budge, run warm water over the joint before pulling again.
- Rinse and dry the shaft: Rinse the metal shaft under warm water and wipe it dry with a cloth. Checkpoint: no dried toothpaste or debris left around the base. A clean shaft helps the new head seat fully and prevents odor.
- Align the new head: For iO, rotate the head until it drops onto the keyed shaft. For Pro/Smart, line up the flat side of the head with the flat side of the shaft. If it does not slide on easily, you have the alignment wrong; do not force it.
- Push down until seated: Press the head down until it stops. Checkpoint: a small gap remains between the head and the handle body. No gap means it is not fully seated and may pop off mid-brush.
- Test the fit: Turn the handle on briefly. The head should run without wobble or rattle. If it wobbles, remove and reseat it. A properly seated head runs smoothly and cleans as intended.
Refill options that fit these steps
- iO Ultimate Clean Replacement Brush Heads, 6-Count, White: iO Ultimate Clean Replacement Brush Heads, 6-Count, White A six-count pack covers about 18 months of brushing for one person, so you can follow the three-month replacement step without reordering constantly.
- Oral-B iO Ultimate Clean Replacement Brush Heads, 1-Count, White: Oral-B iO Ultimate Clean Replacement Brush Heads, 1-Count, White A single head is a low-commitment way to test the iO Ultimate Clean fit on your handle before buying a multi-pack.
- iO Ultimate Clean Replacement Brush Heads, 6-Count, Black: iO Ultimate Clean Replacement Brush Heads, 6-Count, Black Same fit and cleaning as the white six-count, in a color that matches black iO handles or helps family members tell their heads apart.
