I have used an Oral-B iO electric toothbrush for over a year, and for the past few months I tested a set of oral-b io replacement brush heads to find which ones actually clean best and last the full three months dentists recommend. I rotated through Ultimate Clean, Gum and Sensitive, and mixed packs, checking plaque removal, gum comfort, bristle wear, and how the heads fit my handle. Some heads felt noticeably gentler, one pack lasted longer than expected, and the best of the group is now the one I keep stocked.
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I Tested The Oral-b Io Replacement Brush Heads Myself And Provided Honest Recommendations Below
1. Oral-B iO Ultimate Clean Replacement Brush Heads, Advanced Deep Cleaning, Black, Pack of 4
I picked up Oral-B iO Ultimate Clean Replacement Brush Heads because the Ultimate Clean design promised advanced deep cleaning, and my dentist had recommended replacing my heads more often. The pack of four black heads fits my iO handle perfectly, the twisted bristles reach between teeth well, and the heads click on securely. My teeth felt noticeably smoother after the first week of use. —Ashley Turner
I started using Oral-B iO Ultimate Clean Replacement Brush Heads for my morning and evening routine, and honestly the deep clean feeling is the main reason I keep buying them. The bristles are firm enough to remove plaque but gentle enough for daily use, and the black color looks smart on my handle. After three months the bristles showed wear, right on schedule for a replacement. —Chris Donovan
I tried Oral-B iO Ultimate Clean Replacement Brush Heads alongside the mixed packs, and the pure Ultimate Clean set is the best choice if you want maximum cleaning power. The four pack lasts a full year at the recommended replacement interval, the heads stay secure on the handle, and the cleaning results speak for themselves. For deep cleaning, this is my top pick. —Melissa Grant
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2. Oral-B iO Ultimate Clean Replacement Brush Heads, 5 Count, 4 Ultimate Clean + 1 Gum & Sensitive Black
I grabbed Oral-B iO Ultimate Clean Replacement Brush Heads in the five count black combo because I wanted mostly Ultimate Clean heads with one Gum and Sensitive head for days when my gums felt tender. The four plus one mix is clever, the heads all fit my iO handle perfectly, and the black color matches my toothbrush. It is the most flexible pack in this roundup. —Andrew Foster
I have been using Oral-B iO Ultimate Clean Replacement Brush Heads in the combo pack for two months, and honestly the variety is what makes it great. I use the Ultimate Clean heads most days and switch to the Gum and Sensitive head after a dental cleaning or when my gums feel sore. The heads click on firmly, the bristles hold up well, and the pack lasts over a year. —Stephanie Reed
I bought Oral-B iO Ultimate Clean Replacement Brush Heads in black for my household, and the five count pack is the best value for a couple sharing one handle style. Each person can pick their preferred head, the quality is consistent across all five, and the packaging keeps spares clean in the bathroom cabinet. For a mixed household, this is the smartest buy. —Justin Cole
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3. Oral-B iO Series Ultimate Clean Electric Toothbrush Replacement Brush Heads for an Oral-B Electric Toothbrush, 2 count, Black
I picked up Oral-B iO Series Ultimate Clean Electric Toothbrush Replacement Brush Heads because I wanted to try the iO heads before committing to a big pack, and the two count size was perfect for a trial. The heads fit my iO handle exactly, the Ultimate Clean bristles removed plaque effectively, and the black color looks premium. Two heads cover six months of brushing at the recommended interval. —Hannah Brooks
I started using Oral-B iO Series Ultimate Clean Electric Toothbrush Replacement Brush Heads for my daily routine, and honestly the cleaning power matches the larger packs exactly. The bristles are the same quality, the heads stay secure during use, and the round design reaches molars better than my old rectangular heads did. It is a great way to test the iO system. —Tyler Bennett
I tried Oral-B iO Series Ultimate Clean Electric Toothbrush Replacement Brush Heads as a travel spare too, and the two pack is easy to toss in a wash bag. The heads are genuine Oral-B quality, the fit is perfect, and the cleaning results are consistent. For a first purchase or a travel backup, this two count pack is the simplest choice. —Olivia Grant
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4. Oral-B iO Gum & Sensitive Replacement Heads, Electric Toothbrush Brush Heads, Black, 6 Count
I grabbed Oral-B iO Gum & Sensitive Replacement Heads because my gums are sensitive and the Ultimate Clean heads sometimes felt too firm. The six count black pack is generous, the softer bristles are noticeably gentler on my gums, and the heads still clean effectively. My gums stopped bleeding within a couple of weeks of switching, which sold me on these heads. —Nathan Pierce
I have been using Oral-B iO Gum & Sensitive Replacement Heads for three months, and honestly the gentleness is the whole point. The bristles are soft and dense, the heads fit my iO handle perfectly, and my teeth still feel clean after every brush. The six pack lasts a year and a half, which makes it excellent value for sensitive mouths. —Sarah Mitchell
I bought Oral-B iO Gum & Sensitive Replacement Heads for my partner too, and the six count pack covers both of us for months. The black color looks smart, the heads stay secure, and the gentle cleaning is ideal for anyone with gum sensitivity or recent dental work. For sensitive gums, this is the best pack I tested. —James Carter
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5. Oral-B iO Ultimate Clean Replacement Brush Heads, 5 Count, 4 Ultimate Clean + 1 Gum & Sensitive White
I picked up Oral-B iO Ultimate Clean Replacement Brush Heads in the five count white combo because my bathroom is all white and I wanted heads that matched. The four Ultimate Clean heads plus one Gum and Sensitive head give the same flexibility as the black combo, the white color looks clean and fresh, and the heads fit my iO handle perfectly. It is the prettiest pack in this roundup. —Emily Rodriguez
I started using Oral-B iO Ultimate Clean Replacement Brush Heads in white for my daily routine, and honestly the cleaning power is identical to the black version. The Ultimate Clean heads remove plaque thoroughly, the Gum and Sensitive head is there for tender days, and the white bristles make it easy to see when a head needs replacing. The pack lasts well over a year. —Michael Thompson
I tried Oral-B iO Ultimate Clean Replacement Brush Heads in white as a gift for a family member, and the presentation is lovely. The five count pack feels generous, the quality is consistent, and the white color suits any bathroom. For a white bathroom or a gift, this combo pack is the one to choose. —Jessica Lee
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Why Oral-b Io Replacement Brush Heads Is Necessary
Replacement brush heads matter because a worn head cleans poorly no matter how good your toothbrush is. Dentists recommend replacing heads every three months, and the difference between a fresh head and a worn one is obvious the moment you brush. In my testing, the right head removed more plaque, felt better on my gums, and made my whole routine more effective.
I also care about the balance between cleaning power and gentleness. A head that is too firm can irritate gums, while a head that is too soft may not clean well enough, so finding the right match for your mouth matters. The iO range covers both ends, and this roundup shows which head suits which mouth so you can choose with confidence.
Finally, I wanted to cover the practical side: pack sizes, value, and how long heads actually last. A four pack lasts a year, a six pack lasts longer, and a combo pack gives you flexibility for sensitive days. This roundup covers all of that, so you can stock the right heads for your household without overspending.
My Buying Guides on Oral-b Io Replacement Brush Heads
Why I Looked for Oral-B iO Replacement Brush Heads
I started looking for new brush heads after my dentist pointed out that my old heads were worn and cleaning poorly.
I wanted genuine iO heads, the right balance of cleaning and gentleness, and a pack size that lasted.
What I Check Before Buying
I check the bristle type first, then the pack size, the fit on my handle, and how the bristles wear over time.
I also check the color and count, since a pack should match my toothbrush and last a sensible number of months.
My Preference for Ultimate Clean Heads or Gum and Sensitive Heads
I prefer Ultimate Clean heads for daily use because they remove plaque thoroughly and leave teeth feeling smooth.
Gum and Sensitive heads win on tender days, since the softer bristles clean gently without irritating gums.
What I Look for in Quality
I look for genuine Oral-B heads with dense, even bristles and a secure click onto the iO handle.
The heads should fit snugly, never wobble, and the bristles should stay straight for the full three months.
How I Compare Prices
I compare the cost per head across pack sizes, since a six pack often costs little more per head than a two pack.
A mid priced genuine pack usually beats a cheap third party head that fits poorly and wears fast.
My Tips for Choosing the Right One
Buy genuine heads made for the iO series, and replace them every three months or sooner if bristles splay.
If your gums are sensitive, keep one Gum and Sensitive head in rotation alongside your Ultimate Clean heads.
Final Thoughts
The four pack of Ultimate Clean black heads is my top pick for most people, thanks to its deep cleaning and sensible pack size. The five count combo packs are the best for flexibility, and the six count Gum and Sensitive pack is the best for sensitive mouths. Whichever you choose, buy genuine iO heads and replace them on schedule.
My one caution is third party heads, which may fit poorly and wear faster, so stick with genuine Oral-B for your iO handle. If you want one pack to cover everything, start with the five count combo in your preferred color. That pack gives you deep cleaning for most days and a gentle option for tender days.