You brush twice a day, yet your dentist still finds inflamed gums between the same two teeth. It is one of the most common frustrations in oral care, and it has a simple explanation: a toothbrush cannot reach the sides of your teeth, where roughly a third of the surface sits. Cleaning there takes a second tool, and the real question is which one suits your mouth.
At ROZE BioHealth, our approach comes from Dr. David Roze, a biological dentist with 13+ years of clinical practice in Dubai. In the chair, he sees that the best tool is rarely the most fashionable one. It is the one a person will use properly, every day. This guide compares floss, interdental brushes and water flossers honestly, so you can choose with confidence.
Why the space between teeth matters
The contact area between neighbouring teeth is a quiet place for plaque to collect. Plaque is a soft, sticky film of bacteria, and when it sits undisturbed along the gumline it can irritate the gums, leading to redness, puffiness and bleeding. Left alone for long enough, that irritation can progress to more serious gum problems. Cavities also commonly begin on these hidden surfaces.
Healthy gums should not bleed. If yours do when you first start cleaning between your teeth, that is usually a sign of existing inflammation rather than a reason to stop. Many people find bleeding settles within a couple of weeks of consistent, gentle cleaning, but persistent bleeding is worth raising with your dentist.
Dental floss: the classic option
Floss is a thin strand, waxed or unwaxed, that you slide between teeth and curve around each tooth in a C shape, moving gently up and down beneath the gumline. It is inexpensive, portable and effective at removing plaque from tight contacts.
Where floss works best: teeth that are close together, with small gaps and healthy, snug gums.
Where it struggles: technique is the catch. Many people snap the floss down onto the gum, saw it back and forth, or skim the surface without wrapping the tooth. Used that way it does little good and can cause small cuts. Floss also becomes awkward around bridges, braces and wider gaps.
- Use a length of about 40 centimetres and wind most of it around one finger.
- Guide it gently between teeth without forcing it.
- Hug each tooth in a C shape and clean one side, then the other.
- Use a fresh section as you move along.
Interdental brushes: the underrated option
Interdental brushes are tiny bottle-brush shapes on a handle, available in a range of sizes. You insert one into the gap between teeth and move it gently in and out. Many dental professionals favour them for anyone whose teeth have space between them, because the bristles can clean the contours of the tooth surface in a way a flat strand cannot.
Where they work best: medium and larger gaps, receding gums, around bridges, implants and braces, and for people who find floss fiddly.
Where they struggle: very tight contacts, where the brush will not pass without force. Sizing matters too. A brush that is too small cleans poorly, and one that is too large can irritate the gum. You should feel a snug fit with gentle resistance, never pain. Your dentist or hygienist can measure the right size, and you may need different sizes for different areas of your mouth.
Water flossers: the gentle jet
A water flosser directs a pulsing stream of water along the gumline and between teeth. It does not scrape plaque in the way a strand or a bristle does, but it can flush away loosened debris and is comfortable for many people.
Where they work best: braces, bridges and implants, sensitive gums, and people with limited dexterity or those who simply will not floss. A tool you actually use beats a better tool left in a drawer.
Where they struggle: they are bulkier, need a power source or battery, and do not mechanically wipe the tooth surface. Many dentists see them as an excellent addition to brushing and, where possible, a second tool rather than a full replacement for a mechanical method.
Side by side
| Tool | Best for | Less suited to | Practical note |
|---|---|---|---|
| Floss | Tight contacts and small gaps | Wide gaps, bridges, limited dexterity | Technique decides the result |
| Interdental brush | Medium to large gaps, receding gums, implants | Very tight teeth | Needs the right size, often more than one |
| Water flosser | Braces, bridges, sensitive gums, easy daily habit | Being the only cleaning method | Best alongside brushing and, ideally, a mechanical tool |
So what actually works?
The honest answer is that all three can work, and the best choice depends on the shape of your teeth and your habits. A simple way to decide is by the size of the space:
- Teeth touching closely: floss, or a floss pick if a strand is hard to handle.
- Visible gaps or gum recession: interdental brushes in the size your dentist recommends.
- Braces, bridges, implants or sore gums: a water flosser, often paired with interdental brushes.
- Mixed mouth: use a combination, for example a brush for the wider gaps and floss for the tight ones.
Consistency matters more than the product. Once a day, ideally in the evening before brushing, is a realistic target that many people can keep.
Cleaning between teeth and your toothpaste
There is a sensible order worth knowing. Cleaning between your teeth first loosens plaque and food particles, so that the toothpaste you brush with afterwards can reach the surfaces more directly. This is especially relevant if you use a remineralising toothpaste, because the mineral in it needs contact with the enamel to be of use.
Hydroxyapatite is the mineral enamel is largely made of, and a hydroxyapatite toothpaste supplies it to the tooth surface where it can help support remineralisation. Some people also find that cleaner tooth surfaces and calmer gums make brushing more comfortable overall. ROZE’s Natural Fresh Mint Toothpaste, for example, is formulated with 15% micro-hydroxyapatite and needs no rinse afterwards, which fits neatly at the end of an evening ritual of cleaning between the teeth and then brushing.
Common mistakes to avoid
- Forcing the tool. Gentle pressure is enough. Pain means stop and check your technique or size.
- Skipping the gumline. The edge where tooth meets gum is where plaque does the most harm.
- Reusing floss or worn brushes. Replace interdental brushes when the bristles bend or fray.
- Giving up after bleeding. Mild bleeding in the first days is common, but ongoing bleeding deserves a professional opinion.
- Treating a water flosser as a magic fix. It is a useful tool, not a substitute for good brushing.
Frequently asked questions
Is flossing really necessary if I brush well?
A toothbrush cannot reach the sides of teeth where they touch. Cleaning between them once a day removes plaque from areas brushing misses, which is why dentists consistently recommend it.
Are interdental brushes better than floss?
For people with visible gaps, many dental professionals prefer them because they are easier to use well. For very tight teeth, floss is usually the better fit. Your dentist can advise on your own mouth.
Can a water flosser replace floss completely?
It can be a good option for those who struggle with strands, and many people clean well with one. Because it does not mechanically wipe the tooth surface, it is often used alongside a mechanical tool where possible.
Should I clean between my teeth before or after brushing?
Before is a common recommendation, since it clears the way for toothpaste to reach more of the tooth surface. The most important thing is that you do it consistently.
Is it normal for my gums to bleed when I start?
Mild bleeding in the first week or two is common when gums are inflamed. If it continues, or if you notice swelling or persistent bad breath, see your dentist.
The takeaway
There is no single winner. Floss suits tight teeth, interdental brushes suit gaps, and a water flosser suits anyone for whom the other two feel like a chore. Pick the one you will genuinely use, learn the technique properly, and ask your dentist or hygienist to check your sizing at your next visit.
For those exploring a fluoride-free option formulated by dentists to complete that evening routine, ROZE’s range offers one place to start.
