Is flossing really necessary?
Reviewed by Dr. Samuel Bacon, DDS (dentist). Last reviewed November 3, 2026.
Status: Approved
Short answer: Yes, cleaning between your teeth matters. The ADA recommends doing it once a day with floss or another interdental cleaner, because a toothbrush can't fully reach those spaces. Plaque left there can harden into tartar, which only a dental professional can remove. Floss, floss picks, tiny interdental brushes and water flossers are all options.
Why it matters
Plaque is a sticky film of bacteria. The ADA says plaque between your teeth can lead to cavities and gum disease, and it can harden into tartar that only a dental professional can remove. See Plaque vs. tartar.
What the research says
The ADA cites a 2019 Cochrane review. It found that using floss or interdental brushes in addition to brushing may reduce gum inflammation (gingivitis) or plaque more than brushing alone. The ADA notes that the studies have limits. In 2016, the U.S. Department of Health and Human Services reaffirmed flossing as an important oral hygiene practice.
Your options
- string floss
- floss picks
- tiny brushes that reach between teeth
- water flossers
Pick a tool you'll use every day. Your dentist or hygienist can suggest one that fits your teeth and any dental work.
Kids
The ADA says children should start cleaning between their teeth as soon as two teeth touch. Most kids can do it on their own around age 10 or 11.
At Indy Smile Group
If flossing hurts or your gums bleed, mention it at your next visit. The ADA says cleaning between teeth shouldn't hurt. See Why do my gums bleed? See our teeth cleaning pages for Fishers, Carmel and North Indy.
Next step
Ready to talk it through with a dentist? Book online or call the office closest to you.
- Fishers – Smile Dentistry: Book online · (317) 570-5480
- Carmel – Simply Smile Dentistry: Book online · (317) 564-8490
- North Indy – Simply Smile Dentistry: Book online · (317) 672-7511
Frequently asked questions
Should I floss before or after brushing?
The ADA says either is fine. What matters is cleaning between your teeth once a day.
Does a water flosser count?
The ADA includes water flossers among interdental cleaners. Ask your dentist which tool suits you.
Can I reuse floss?
The ADA doesn't recommend using floss or other between-teeth cleaners more than once. Used ones can fray or put bacteria back into your mouth.
Sources
Last reviewed: November 3, 2026
Reviewed by: Dr. Samuel Bacon, DDS (dentist)