How to Floss Properly: String Floss vs Water Flossers vs Interdental Brushes
Brushing alone cleans only about three sides of every tooth. The space between teeth, where a toothbrush cannot reach, is where plaque and food particles quietly build up and lead to cavities and gum disease. This is why interdental cleaning, cleaning between the teeth, is just as important as brushing. At our clinic in Sector 57, Gurugram, we see many patients who brush diligently but skip this step, and it shows up as bleeding gums or early decay between teeth during routine checkups.
This guide explains the correct flossing technique and compares the three most common tools: string floss, water flossers, and interdental brushes, so you can choose what suits your mouth best.
Correct String Flossing Technique
Many people floss incorrectly by simply snapping the floss in and out, which can injure the gums without removing much plaque. Here is a better approach:
- Break off about 45 cm of floss and wind most of it around your middle fingers, leaving 4 to 5 cm to work with.
- Hold the floss taut between your thumbs and index fingers.
- Gently guide it between two teeth using a back and forth sawing motion. Do not snap it down onto the gum.
- Curve the floss into a C-shape against one tooth and slide it slightly under the gumline, then move it up and down against that tooth surface.
- Repeat the C-shape curve against the neighbouring tooth before moving to the next gap.
- Use a clean section of floss for each gap so you are not redepositing plaque.
String Floss, Water Flossers, and Interdental Brushes: A Comparison
Each tool has strengths depending on your gum health, tooth spacing, and dexterity.
| Tool | Best For | Limitations |
|---|---|---|
| String floss | Tight, normal contact points between teeth; scraping plaque off tooth surfaces | Requires finger dexterity; can be hard to use with braces or bridges |
| Water flosser | Flushing debris around braces, bridges, and implants; people with limited dexterity or arthritis | Less effective at removing sticky plaque film compared to physical scraping |
| Interdental brushes | Wider gaps, receded gums, and areas around braces or implants | Not ideal for very tight, healthy contact points; needs correct size selection |
String Floss
Traditional string floss remains one of the most effective ways to physically scrape plaque off the sides of teeth, especially where gaps are naturally tight. It is inexpensive and portable, though it takes some practice to use comfortably.
Water Flossers
A water flosser uses a pressured stream of water to dislodge food particles and reduce gum inflammation. It is particularly helpful for people with braces, dental bridges, or implants, and for those who find string floss physically difficult to manage. It is a useful addition but works best when paired with brushing rather than used entirely on its own.
Interdental Brushes
These small, cone-shaped brushes slide between teeth and are especially useful once gum recession or wider gaps have developed, which is common with age or after gum treatment. They come in different sizes, and using the correct size for each gap matters for effectiveness and comfort.
Which One Should You Choose?
There is no single best tool for everyone. Many dentists recommend:
- String floss for people with naturally tight, healthy contact points between teeth
- Interdental brushes for people with slightly wider gaps, gum recession, or braces
- Water flossers as a helpful addition, particularly for implants, bridges, or reduced hand dexterity
Some patients find it useful to combine two methods, for example using interdental brushes in wider back gaps and string floss for tighter front teeth.
Getting Personalised Guidance
The right tool and technique depend on your specific gum health and tooth spacing, which can vary from one part of your mouth to another. During a routine visit at our Sector 57 clinic, our dentists can check your gum condition, show you the correct technique in person, and recommend the right interdental brush sizes if needed. A short demonstration often makes a bigger difference than months of guessing on your own.
Consistent daily interdental cleaning, combined with regular brushing and dental checkups, is one of the most effective and low-cost ways to protect your teeth and gums for the long term.
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Dr Aishwarya's Dental Clinic · Sector 57, Gurugram
Frequently asked questions
Is a water flosser as good as string floss?
A water flosser is good at flushing out food debris and reducing gum inflammation, but it does not scrape plaque off the tooth surface as thoroughly as string floss or interdental brushes. Many dentists suggest using one of these alongside a water flosser rather than instead of it.
How often should I floss?
Once a day is enough for most people, ideally at night before brushing. Consistency matters more than the time of day you choose.
Why do my gums bleed when I floss?
Bleeding usually means there is plaque buildup and mild gum inflammation (gingivitis) near the gumline. This typically improves within one to two weeks of gentle, regular flossing. If bleeding continues beyond that, get your gums checked.
Can interdental brushes damage my gums or teeth?
Used correctly and in the right size, interdental brushes are safe and often gentler on gums than force-fitting string floss into tight spaces. A dentist or hygienist can help you pick the right sizes for different gaps.
Treatment costs mentioned on this page are indicative ranges for the Sector 57, Gurugram region. Your exact cost depends on your case and will be confirmed after a clinical examination at the clinic.