Most people brush their teeth twice a day without question, but flossing is treated as optional by a large proportion of the population. This is a significant gap in daily oral hygiene, because no matter how thoroughly you brush, a toothbrush cannot reach the surfaces where teeth contact each other. Those interproximal surfaces are where plaque accumulates undisturbed, where cavities develop between teeth, and where gum disease most commonly begins.
This guide covers what dental floss actually does, the specific benefits it provides, how to use it correctly, and the alternatives worth considering if traditional flossing doesn’t suit your situation.
What Is Dental Floss and What Does It Do?
Dental floss is a thin strand of nylon, Teflon, or similar material designed to clean the contact surfaces between teeth and the margin where the gum meets the tooth. It comes in waxed and unwaxed varieties, as well as wider dental tape and specialty floss for use around dental work.
toothbrush cleans the buccal, lingual, and occlusal surfaces of the teeth, the cheek-facing, tongue-facing, and biting surfaces. It cannot effectively clean the narrow contact point where two adjacent teeth meet. Plaque accumulates in this space continuously and, if not removed, mineralises into tartar within 24 to 72 hours. Once mineralised, tartar cannot be removed by brushing and requires professional cleaning.
Tartar build-up and its consequences for gum health follow a predictable and largely preventable pattern. Flossing removes this plaque before it hardens, clears food debris from interproximal spaces, and disrupts the bacterial environment along the gum line that drives both cavities and gum disease.
The Benefits of Dental Floss
1. Prevents Cavities Between Teeth
Interproximal cavities, those that develop on the contact surfaces between teeth, are among the most common and most preventable types of tooth decay. Daily flossing removes the plaque that produces these acids before they can do lasting damage. When interproximal decay does develop and is caught early, a dental filling is all that’s required. Delayed detection typically means a larger cavity, deeper involvement, and more complex treatment.
2. Reduces the Risk of Gum Disease
Gum disease begins at the gum margin, where plaque accumulation triggers an inflammatory response in the gum tissue. If plaque at the gum margin is not consistently removed, the inflammation progresses into the supporting structures of the tooth. The signs that gum disease has developed are worth recognising early, because treatment becomes progressively more involved as the condition advances. Flossing is the only home hygiene tool that removes plaque at and slightly below the gum margin between teeth.
3. Eliminates a Primary Source of Bad Breath
Persistent bad breath that doesn’t resolve with brushing is most commonly caused by bacterial activity in areas brushing doesn’t reach. Food particles and plaque trapped between teeth decompose and produce volatile sulphur compounds. Mouthwash temporarily reduces the odour but doesn’t address the source. Daily flossing removes the organic material and bacterial film that produce these compounds.
4. Supports Cleaner and Healthier Gums
Healthy gum tissue sits snugly against the teeth, appears pale pink, and doesn’t bleed when disturbed. Consistent flossing keeps the gum margin free of the bacterial irritants that cause chronic low-grade inflammation. For patients who begin flossing after a period of not doing so, some initial bleeding is normal and typically resolves within one to two weeks.
5. Reduces Long-Term Treatment Costs
The financial logic of flossing is straightforward. Cavities require fillings, advanced cavities require root canal treatment, and irreversible gum disease requires scaling and root planing or surgical procedures. Flossing costs nothing beyond a moment of daily effort and prevents the conditions that lead to these interventions.
6. Contributes to Systemic Health
Chronic gum disease has been linked to cardiovascular disease, type 2 diabetes, and adverse pregnancy outcomes. The mechanism involves chronic bacterial exposure and inflammatory mediators entering the bloodstream through inflamed gum tissue. Reducing gum inflammation through consistent oral hygiene, including flossing, is a straightforward contribution to broader health.
How to Floss Properly
Correct technique matters. Incorrect flossing — snapping the floss into the gum, using the same section repeatedly, or only going straight up and down without adapting to the tooth’s contour — is less effective and can cause unnecessary gum trauma.
- Break off approximately 45 centimetres of floss. Wind the majority around each middle finger, leaving a working section of about three centimetres.
- Hold the floss taut between thumbs and index fingers and slide it gently between two teeth using a slight back-and-forth motion. Do not snap it down into the gum.
- Once at the gum line, curve the floss into a C-shape against one tooth. Gently slide it up and down the side of the tooth, going just slightly below the gum margin.
- Curve the floss against the adjacent tooth and repeat.
- Move to a clean section of floss before proceeding to the next gap.
- Work systematically through all teeth, including the back surfaces of the last molars.
The best time to floss is before brushing, so that loosened plaque and debris are swept away during brushing and rinsing.
Flossing Alternatives
For patients who find traditional flossing difficult, due to limited dexterity, braces, bridges, implants, or other dental work, several alternatives provide effective interproximal cleaning.
Floss picks. Pre-threaded floss on a plastic handle. More convenient than finger-held floss and suitable for on-the-go use.
Interdental brushes. Small cylindrical or tapered brushes available in graduated sizes. Particularly effective where gaps are wider than normal, and for cleaning around bridge pontics and orthodontic brackets.
Water flossers. Devices that direct a pressurised water stream between teeth and along the gum line. Particularly helpful for patients with implants, bridges, or braces. For patients with Invisalign aligners or fixed appliances, interdental brushes and water flossers are often easier to use than traditional floss. Water flossers are generally most effective as a complement to mechanical flossing rather than a complete substitute.
The most effective tool is the one that will be used consistently. If a pick or water flosser removes the barrier to daily cleaning, it is considerably better than nothing.
When to See a Dentist About Flossing Concerns
Routine dental check-ups and professional cleans remove the tartar that accumulates despite diligent home care and allow the dentist to monitor areas that home inspection cannot assess. Specific situations that warrant a prompt dental appointment:
- Gums that continue to bleed after two weeks of consistent flossing
- Persistent bad breath despite thorough brushing and flossing
- Pain, discomfort, or sensitivity when flossing
- Gum tissue that appears to be receding from the tooth surface
- Any tooth that feels loose or has changed position
According to the Australian Dental Association, daily flossing combined with twice-daily brushing and regular professional cleaning forms the minimum standard for effective home oral hygiene.
Welcoming Patients From Across the North Shore
Our team regularly provides personalised oral hygiene guidance alongside professional cleaning appointments. If you’re based in Willoughby, Artarmon, or Castlecrag, our Chatswood practice is easy to reach.
Ready to Take Your Oral Health Further?
If you have questions about your flossing technique or want a professional assessment of your gum health, our team at Simply Dental Chatswood is here to help. professional dental clean and oral health assessment gives you both a clean starting point and tailored guidance for your home routine.
Book your appointment and invest a few minutes a day in better long-term oral health.
Frequently Asked Questions
Is it really necessary to floss every day?
Yes. Plaque begins to mineralise into tartar within 24 to 72 hours. Daily flossing is what prevents this build-up before it progresses to the point where only professional cleaning can address it.
My gums bleed when I floss. Should I stop?
No. Bleeding when you begin or resume flossing is a sign of existing gum inflammation, not an injury caused by the floss itself. Continue flossing gently and consistently. Bleeding typically resolves within one to two weeks. If it persists, a dental assessment is appropriate.
Is there a best time of day to floss?
Flossing once per 24 hours is the key requirement. Doing it before your evening brush allows the loosened plaque to be brushed away.
Can a water flosser replace traditional floss?
For most people, a water flosser is most effective as a complement to mechanical flossing rather than a replacement. It excels at removing food debris, but the physical friction of floss is generally more effective at disrupting the adhesive plaque layer.
