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Flossing means cleaning the narrow spaces between teeth with dental floss. These surfaces can be hard to reach with a toothbrush alone. For most people, the useful habit is daily cleaning between teeth, alongside brushing with fluoride toothpaste.
This guide explains dental flossing benefits, a gentle technique and the options for braces. You do not need the most expensive device. You need a method that suits your teeth and that you can use correctly and consistently.
Dental flossing benefits: what the evidence supports
The American Dental Association (ADA) recommends cleaning between teeth once a day. Floss helps remove trapped food and plaque from areas a toothbrush cannot fully reach. However, it cannot remove hardened tartar; that needs professional dental cleaning.
Research supports realistic expectations. A 2019 Cochrane review found that adding floss to brushing may reduce gum inflammation. Interdental brushes may also help, and could outperform floss for some gum outcomes.
The evidence was low to very low certainty and mostly short term. No included trial assessed tooth decay, and few assessed severe gum disease. Those limitations do not make occasional cleaning equivalent to a daily routine. They do mean we should avoid promising that one device guarantees lifelong healthy gums.
Choose dental flossing for oral cleaning, not as a teeth-whitening treatment or a proven way to prevent heart disease. It also does not replace a dental check-up when you have symptoms. Our oral hygiene guide explains the wider daily routine.
How to floss your teeth gently
Follow the ADA’s flossing technique and ask your dentist to watch you practise if you are unsure:
- Wind about 45 cm of floss around your middle fingers.
- Hold it between your thumbs and index fingers.
- Gently guide it between teeth without snapping into the gum.
- Curve it against each tooth in a C. Slide gently below the gum edge and along the tooth.
- Clean both facing surfaces and behind your last teeth.
If cleaning still hurts, ask your dentist to check your technique.
Which tool should you choose?
Think about the spaces between your teeth, your ability to handle the tool and any dental work. A dentist or hygienist can demonstrate an option that fits. For example, an interdental brush that works in an open gap may not fit a tight contact.
| Tool | When it may help | What to check |
|---|---|---|
| String floss or dental tape | Cleaning contacts that a small brush cannot enter | Can you guide it gently and curve it around each tooth? |
| Interdental brush | Cleaning gaps where a brush fits | Ask for the right size; do not force it through a tight space. |
| Floss holder | Making floss easier to handle | Ask for a demonstration if the shape makes back teeth difficult to reach. |
| Water flosser | When hand flossing is difficult, including around some dental work | Follow the device instructions and your dentist’s advice. |
The NHS recommends a snug-fitting interdental brush, especially where teeth have gaps. A larger brush is not automatically better. Get help choosing sizes rather than pushing through resistance.
For water devices, the ADA explains that accepted water flossers can help remove plaque and reduce gingivitis. They can be useful with braces or bridges, or when manual flossing is hard. They still belong alongside toothbrushing, not instead of it.
Flossing with braces
Fixed braces create extra areas where food and plaque can collect. The American Association of Orthodontists advises daily flossing, careful brushing and using an interproximal brush for difficult spaces.
Ask your orthodontist to demonstrate how to clean around your particular wire and brackets. A floss threader may help you access the spaces without pulling on the appliance. A water flosser may also be an option, depending on your cleaning needs.
Do not guess how to thread around unfamiliar dental work. Bring your chosen tool to your appointment and ask: “Can you show me how to clean every space with this?” Contact your orthodontist promptly if a bracket breaks or a wire becomes loose.
Before or after brushing?
The NHS suggests flossing before brushing. Brush twice daily for about two minutes with fluoride toothpaste. Afterwards, spit out the excess toothpaste without immediately rinsing it away. Rinsing removes the concentrated fluoride left on your teeth.
If you use mouthwash, choose a different time, such as after lunch. Mouthwash immediately after brushing also washes away that fluoride. This is different from rinsing away food before you brush.
The ADA considers either brushing order acceptable when cleaning is thorough. Choose a daily routine you can keep. For example, you could clean between teeth before your evening brush rather than waiting until food feels stuck.
Bleeding gums: when to see a dentist
Do not assume bleeding means you should stop all cleaning, or that harder flossing will solve it. The NHS advises seeing a dentist for bleeding gums, painful or swollen gums, or bad breath. Children with sore or bleeding gums also need assessment.
Ask for an urgent dental appointment for very sore, swollen gums, loose teeth, mouth ulcers or red patches, or a mouth or lip lump. A home cleaning routine cannot diagnose the cause. Tell the dentist where you notice bleeding and which tool you use.
Common questions about dental flossing
Can I rinse and reuse dental floss?
No. The ADA advises discarding used floss. It can fray, become less effective and carry bacteria from the previous use. For reusable equipment such as a water flosser, follow the manufacturer’s cleaning instructions.
Do I have to buy a particular brand?
No single brand is the right choice for every mouth. The ADA Seal can help identify evaluated products. Also consider whether you can use the device comfortably, replace supplies and follow its care instructions. Ask your dentist to suggest a suitable type before buying an expensive device.
When should children start flossing?
Start when two teeth touch, according to the ADA. Adults need to help initially. Ask for a demonstration at your child’s dental visit.
A practical next step: bring your floss or interdental cleaner to your next dental visit. Ask for a technique check and a plan for any hard-to-reach areas. Consistent, gentle cleaning is more useful than changing products without knowing how to use them.
About this information
HealthyCura shares health and wellness information for general reading. This article does not replace professional medical advice, diagnosis or treatment.
