Flossing helps prevent gum disease because it removes the plaque and food particles trapped between teeth, spaces a toothbrush cannot reach, before that plaque hardens into tartar and irritates the gums. At Sola Dental Spa in Staten Island, gum health is overseen by Dr. Daniel Nejat, DMD, a board-certified periodontist, who considers flossing the single most underused tool patients already own. Brushing cleans the visible surfaces, but gum disease almost always starts in the spaces between teeth that a brush cannot fully reach. Flossing works alongside the professional cleanings and exams covered on our services page.
Daily flossing removes plaque and food debris from between teeth and along the gumline before it hardens into tartar. Because gum disease begins with plaque bacteria, consistent flossing is one of the most effective ways to prevent it, alongside brushing twice a day and regular checkups.
“Most of the gum disease I see starts in exactly the spot a toothbrush cannot clean, the tight space between two teeth. Patients who floss daily are doing the one thing that reaches that space every day. It is a small habit with an outsized effect on whether gums stay healthy.”
Dr. Daniel Nejat, DMD, Board-Certified Periodontist, Sola Dental Spa
A patient from Grasmere brushed diligently twice a day but never flossed, and her gums bled at every cleaning despite her effort. We spent one visit on flossing technique, the gentle C-shape curve against each tooth rather than a hard snap through the contact point. Three months later her bleeding had resolved almost completely, without a single change to her brushing routine.
Why does flossing matter if you already brush?
A toothbrush cleans the front, back, and biting surfaces of teeth, but it cannot reach the tight contact points between them. Plaque left there feeds the bacteria that cause gum inflammation and, over time, gum disease.
Roughly a third of each tooth's surface sits against its neighbor, hidden from bristles no matter how carefully you brush. According to the American Dental Association, cleaning between your teeth removes food particles and plaque that a toothbrush cannot reach, and the ADA recommends flossing once a day for that reason. Left undisturbed, that plaque hardens into tartar within a day or two, and tartar can only be removed by a dental professional.
How exactly does plaque turn into gum disease?
Plaque bacteria irritate the gum tissue they sit against, causing the redness, swelling, and bleeding of early gum disease. Left in place, that irritation can advance from reversible gingivitis toward more serious periodontitis.
Plaque is a living film of bacteria that reforms on teeth constantly. Where it collects along the gumline and between teeth, the gum tissue reacts with inflammation, which is what shows up as bleeding when you brush or floss. This early stage, gingivitis, is fully reversible. Our guide to reversing early gum disease covers what that recovery looks like. Left unaddressed, the same bacteria can spread below the gumline, where the damage becomes harder to undo.
What is the right way to floss?
Use about eighteen inches of floss, guide it gently between each tooth with a rubbing motion, then curve it into a C shape against one tooth and slide it just under the gumline before moving to the next space.
Technique matters as much as frequency. Snapping floss straight down into the gums causes the exact irritation you are trying to prevent, while a gentle curved motion clears plaque without injuring tissue. Take it slowly at first if flossing is new to you, some tenderness during the first week is normal as gums adjust, but persistent pain is worth mentioning at your next visit.
| Tool | Best for |
|---|---|
| Traditional string floss | Most people, tight natural contacts between teeth |
| Floss picks | Convenience and reaching back teeth easily |
| Water flosser | Braces, bridges, and other dental work that trap food |
Frequently asked questions
Is flossing really necessary if I brush well?
Yes. Brushing cannot reach the space between two teeth pressed against each other, and that space is where a large share of plaque collects. Flossing and brushing address different surfaces, and skipping either one leaves part of your mouth uncleaned every day.
Why do my gums bleed when I start flossing again?
Bleeding usually means the gums are inflamed from plaque that built up while you were not flossing, not that flossing itself caused damage. Stick with a gentle daily habit and the bleeding typically resolves within one to two weeks as the tissue heals.
Should I floss before or after brushing?
Either order works, as long as you floss thoroughly once a day. Some people prefer flossing first so brushing sweeps away the loosened debris afterward, but the daily habit itself matters more than the sequence.
Can water flossers replace string floss?
For many people, yes, particularly with braces, bridges, or tight spaces that are hard to reach with string. A water flosser removes food debris and plaque effectively, though your dentist can help you decide which tool suits your mouth best.
How often do Staten Island patients need a professional cleaning if they floss daily?
Most people still benefit from a cleaning every six months, since flossing prevents new plaque but cannot remove tartar that has already hardened. Daily flossing simply means those cleanings tend to go faster and gums show less inflammation at each visit.