Clinical evidence generally indicates that interdental brushes are more effective than traditional dental floss for removing plaque and reducing gum inflammation in most adults. While both tools are designed to clean the surfaces between the teeth that a toothbrush cannot reach, interdental brushes provide a more thorough mechanical action across the often-concave surfaces of the teeth. However, the choice between the two frequently depends on the size of the gaps between the teeth and the specific dental needs of the individual.
What We’ll Discuss in This Article
- The mechanical advantages of interdental brushes over traditional floss.
- Specific scenarios where dental floss remains the preferred option.
- Clinical research comparing the efficacy of both interdental tools.
- The importance of choosing the correct size for interdental brushes.
- How to combine different tools for a comprehensive hygiene routine.
- Professional guidance on the safest techniques for interdental cleaning.
Mechanical Efficacy and Plaque Removal
Interdental brushes consist of a small handle with a wire core and circular bristles, designed to “scrub” the entire space between two teeth. Traditional floss is a single strand that must be curved around the tooth to scrape the surface. Because the spaces between teeth are often not flat, a single strand of floss may skip over depressions or concave areas. The NHS states that interdental brushes are often better for cleaning between your teeth than floss because they can reach into these small gaps more effectively.
When Dental Floss is the Better Choice
Despite the advantages of brushes, dental floss is still essential for people with very tight tooth contacts. In areas where the teeth are crowded or touch so closely that even the smallest interdental brush cannot pass through without force, floss is the only viable tool for disrupting the bacterial biofilm. Floss is also highly effective for cleaning just below the gumline in healthy mouths with tight gingival attachment. For many people, a combination of both tools is necessary: brushes for the larger gaps between molars and floss for the tighter front teeth.
Clinical Evidence and Gum Health
A wide range of clinical studies, including systematic reviews by the Cochrane Collaboration, has shown that interdental brushes are superior to floss for reducing gingivitis (gum inflammation) and plaque scores. The bristles of an interdental brush provide a multidirectional mechanical action that is highly efficient at removing the sticky plaque film.
| Feature | Interdental Brushes | Dental Floss |
| Efficiency | High; cleans irregular tooth surfaces well. | Moderate; requires precise technique. |
| Ease of Use | Generally easier for those with limited dexterity. | Requires more manual coordination. |
| Target Area | Larger gaps and around dental work. | Very tight contacts and under the gumline. |
| Reusability | Can be rinsed and reused for about a week. | Single use only. |
The Importance of Correct Sizing
For interdental brushes to be effective and safe, the correct size must be used. A brush that is too small will not clean the surfaces effectively, while a brush that is too large can cause trauma to the gum tissue and wear down the tooth enamel. Most manufacturers use a colour-coded system to indicate different widths. A professional dental hygienist can help determine the specific sizes required for different parts of the mouth, ensuring that the brush fits snugly but can be moved back and forth with minimal resistance.
Cleaning Around Dental Work
Interdental brushes are significantly better for individuals with orthodontic braces, dental bridges, or implants. The bristles can reach under the wires of braces and into the complex anatomy around bridge supports and implant crowns where floss often shreds or becomes stuck. Specialised interdental tools are also available for cleaning the wide gaps that can occur after gum surgery or because of advanced periodontitis, where traditional floss would be largely ineffective.
Establishing a Consistent Routine
Regardless of whether you use brushes or floss, the most critical factor for oral hygiene is consistency. Interdental cleaning should be performed once a day, preferably in the evening before brushing your teeth. This routine ensures that the foundations of the teeth remain free of the bacterial toxins that lead to bone loss and tooth mobility. It is normal to experience some slight bleeding when first starting a routine, but this should resolve within a week as the health of the gum tissue improves through regular cleaning.
Conclusion
Interdental brushes are generally more effective than floss for most adults due to their superior ability to scrub the irregular surfaces between teeth. However, floss remains a vital tool for those with very tight gaps. The best oral hygiene routine often incorporates a tailored mix of both tools based on the unique anatomy of your mouth. Consistency and correct sizing are essential for protecting the gums and preventing decay. If you experience severe, sudden, or worsening symptoms, call 999 immediately.
Can I use the same interdental brush for all my teeth?
Most people have different sized gaps in different parts of their mouth and will likely need two or three different coloured brushes for a thorough clean.
Is it okay to use a toothpick instead of an interdental brush?
No, toothpicks are often too abrasive and cannot clean the tooth surfaces effectively; they are more likely to cause gum injury than remove plaque.
Why does my floss always shred between my molars?
Shredding often happens if there is a sharp edge on a filling or a build-up of hard tartar; your dentist should check these areas to ensure they can be cleaned properly.
Are water flossers as good as interdental brushes?
Water flossers are excellent for removing food debris, but many dentists believe they are not yet a complete substitute for the physical scrubbing action of a brush or floss.
How often should I replace my interdental brush?
A single brush can usually be rinsed and reused for about a week, or until the bristles become frayed or the wire starts to bend.
Can I use toothpaste with my interdental brush?
It is not usually necessary to use toothpaste with the brush, but some people find that dipping the brush in fluoride mouthwash or a tiny amount of toothpaste provides extra protection.
What should I do if the wire on the brush breaks?
If a wire breaks while the brush is between your teeth, stay calm and try to remove it with tweezers; if you cannot remove it, see a dentist immediately.
Authority Snapshot (E-E-A-T)
This article compares the clinical efficacy of interdental cleaning tools. It has been reviewed by Dr. Stefan Petrov, a UK-trained physician with an MBBS and certifications in BLS and ACLS. Dr. Petrov’s experience in general medicine, surgery, and emergency care ensures that this information is aligned with the public health standards and clinical guidelines established by the NHS and NICE.
