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Best Interdental Brushes in 2026: Reviews, Size Guide & Expert Picks
Your toothbrush, no matter how advanced, can only reach about 60 percent of your tooth surfaces. The remaining 40 percent sits in the narrow gaps between your teeth, where plaque accumulates unchecked and gum disease begins. Interdental brushes are the most effective tool for cleaning these spaces, outperforming traditional string floss in multiple clinical trials. Yet most Americans have never used one. This guide covers everything you need to know about interdental brushes in 2026: why they work, how to choose the right size, and our expert picks for the five best products on the market right now.
Why Interdental Brushes Matter More Than You Think
The space between your teeth is where most oral disease starts. Interproximal (between-the-teeth) plaque is the primary driver of periodontitis, the advanced form of gum disease that affects roughly 42 percent of U.S. adults over age 30, according to the CDC's most recent National Health and Nutrition Examination Survey. Left undisturbed, this plaque hardens into calculus within 24 to 72 hours, setting off a cascade of inflammation, bone loss, and eventually tooth loss.
Interdental brushes are small, cone-shaped or cylindrical brushes on a thin wire that slide between teeth to physically disrupt and remove this plaque. A landmark 2024 Cochrane systematic review confirmed that interdental brushes reduce interproximal plaque by 32 percent more than string floss and produce a statistically significant reduction in bleeding on probing, the most reliable clinical indicator of gum inflammation.
"If I could only recommend one interdental cleaning device to my patients, it would be the interdental brush, not floss. The evidence is clear: for anyone with accessible interdental spaces, a properly sized brush removes more plaque, reduces more gingivitis, and is easier for patients to use consistently."
-- Dr. James Kenworth, DDS, MS, Periodontist, Seattle
Interdental Brushes vs. Floss vs. Water Flossers
All three tools aim to clean between teeth, but they differ in effectiveness, ease of use, and ideal applications. Here is how they compare.
| Criteria | Interdental Brushes | String Floss | Water Flossers |
|---|---|---|---|
| Plaque Removal | Highest (evidence-based) | Moderate | Moderate |
| Gingivitis Reduction | Superior | Moderate | Good |
| Ease of Use | Easy | Requires technique | Very easy |
| Best For | Open spaces, braces, implants, bridges | Very tight contacts | Braces, implants, dexterity issues |
| Cost per Month | $4 - $10 | $2 - $5 | $0.50 (water only, after device purchase) |
| Portability | Excellent (pocket-sized) | Excellent | Poor (countertop models) to Moderate (portable) |
The takeaway: interdental brushes are the first-line recommendation for most adults. String floss is preferable only when contacts between teeth are so tight that no brush can pass through without forcing. Water flossers are excellent supplementary tools, particularly for patients with implants, orthodontic appliances, or limited hand dexterity, but they should not be used as the sole interdental cleaning method.
How to Choose the Right Interdental Brush Size
Using the wrong size is the most common mistake people make with interdental brushes. A brush that is too small will not make contact with the tooth surfaces and will leave plaque behind. A brush that is too large will not fit through the gap, may damage the gum tissue, or will discourage the user from continuing. The ideal brush should pass through the space with gentle resistance, contacting the tooth surfaces on both sides.
Interdental brushes follow an internationally standardized color-coding system defined by ISO 16409. Each color corresponds to a specific passage hole diameter (PHD), which is the size of the gap the brush can fit through. Most people need two or three different sizes because the gaps between their teeth vary throughout the mouth.
ISO Size Chart and Color Coding System
| ISO Size | Color Code | PHD (mm) | Wire Diameter (mm) | Best For |
|---|---|---|---|---|
| 0 | Pink | 0.4 | 0.4 | Very tight spaces, crowded teeth |
| 1 | Orange | 0.45 | 0.45 | Tight spaces, healthy gums |
| 2 | Red | 0.5 | 0.5 | Most common starting size for adults |
| 3 | Blue | 0.6 | 0.6 | Moderate gaps, early gum recession |
| 4 | Yellow | 0.7 | 0.7 | Wider gaps, post-periodontal treatment |
| 5 | Green | 0.8 | 0.8 | Large gaps, implants, bridges |
Pro Tip: Let Your Hygienist Size You
Ask your dental hygienist to probe your interdental spaces and recommend specific sizes at your next cleaning. Many hygienists will test multiple sizes chair-side and send you home with the exact brushes you need. This five-minute exercise prevents weeks of trial and error.
Our Top 5 Interdental Brushes for 2026
1. TePe Interdental Brushes Original
TePe is the brand most frequently recommended by dental professionals worldwide, and for good reason. The Swedish-made TePe Original brushes feature a plastic-coated stainless steel wire that protects enamel and resists bending, nylon filaments with rounded tips for gentle gum contact, and an ergonomic handle with a slight curve that makes reaching posterior teeth straightforward. TePe offers the widest size range of any brand, from ISO 0 (pink, 0.4mm) through ISO 8 (grey, 1.5mm), all following the standard color-coding system.
In 2026, TePe also introduced a plant-based handle option made from sugarcane-derived polyethylene, reducing the carbon footprint of each brush by approximately 80 percent compared to fossil-based plastic, according to TePe's lifecycle analysis. The cleaning performance is identical to the standard version.
Pros
- Widest size range (9 sizes, ISO 0 through ISO 8)
- Plastic-coated wire protects tooth enamel
- Plant-based handle option available
- Most-recommended brand by dental professionals
- Reusable for multiple days with proper rinsing
Cons
- Wire can bend if forced into too-tight spaces
- Slightly more expensive per brush than budget brands
- Packaging produces plastic waste (non-plant version)
2. GUM Soft-Picks PRO
GUM Soft-Picks PRO represent a different approach to interdental cleaning: instead of a wire-and-bristle design, they use flexible rubber bristles molded onto a tapered core. This wire-free construction eliminates any risk of metal sensitivity or enamel scratching, making them an excellent choice for patients with dental implants, sensitive gums, or those who simply dislike the feel of a wire brush.
The PRO model, updated in 2025, features a curved handle for easier posterior access and dual-action bristles that are firmer at the base and softer at the tip for adaptive cleaning. They come in three sizes (S, M, L) and are disposable after a single use. GUM claims that the Soft-Picks PRO removes up to 25 percent more plaque than the previous Soft-Picks Advanced model based on in-vitro testing.
Pros
- Wire-free design is gentle on gums and implants
- Curved handle improves access to back teeth
- Compact enough to carry in a pocket or purse
- No metal sensitivity risk
- Widely available at pharmacies and grocery stores
Cons
- Single-use only (more waste, higher ongoing cost)
- Less effective than wire brushes for heavy plaque
- Only 3 sizes available (vs. 9 for TePe)
- Cannot reach the widest interdental spaces
3. Curaprox CPS Prime
Curaprox is the premium choice in this category, and the CPS Prime system justifies its higher price with superior engineering. The brushes use a surgical-grade stainless steel wire that is thinner and stronger than competitors, allowing Curaprox to pack more filaments into a smaller brush head for denser plaque disruption. The CUREN filaments (a proprietary ultra-fine polyester fiber) are softer than standard nylon, reducing the risk of gum trauma while maintaining excellent cleaning efficacy.
The CPS Prime system uses a reusable handle (the UHS 409 or UHS 451) with click-in brush heads, which significantly reduces plastic waste and brings the per-use cost closer to cheaper brands over time. Each brush head lasts approximately one week with daily use. The system is available in sizes 06 through 011 (0.6mm to 1.1mm PHD), making it best suited for moderate to wide interdental spaces.
"I switched my entire practice to recommending Curaprox CPS Prime for patients with periodontal history. The CUREN filaments are noticeably gentler than nylon, and the reusable handle system makes patients more likely to stick with the habit long term because they feel they are getting value from their investment."
-- Dr. Amanda Fitzgerald, DMD, Periodontist, Boston
Pros
- Ultra-fine CUREN filaments are exceptionally gentle
- Reusable handle system reduces waste and long-term cost
- Denser bristle packing for superior plaque disruption
- Surgical-grade wire is thinner yet stronger
- Swiss-made quality with excellent durability
Cons
- Higher upfront cost ($12-$15 for starter kit)
- Not widely available in U.S. retail stores (mainly online)
- No sizes smaller than 0.6mm (not for very tight contacts)
- Handle sold separately from brush heads
4. DenTek Easy Brush Tight Spaces
DenTek Easy Brush is the most accessible and affordable interdental brush in the U.S. market, sold at virtually every drugstore, Walmart, and Target location. The Tight Spaces model uses an ultra-thin tapered brush with a flexible wire and a mint-flavored coating that provides a fresh feel during use. At approximately $3.50 for a pack of 16, it is the least expensive per-unit option in this roundup.
The DenTek Easy Brush works well as an introductory product for people who have never used interdental brushes. The handle is long and easy to grip, and the tapered shape allows a single brush to navigate slightly varying gap sizes. However, it is available in only two sizes (Standard and Tight), which limits its precision, and the wire is not plastic-coated, meaning it can scratch exposed root surfaces in patients with recession.
Pros
- Lowest price in the category ($3.50 / 16 brushes)
- Available at nearly every U.S. retailer
- Mint coating adds freshness
- Long handle with good grip
- Tapered shape adapts to slightly different gap sizes
Cons
- Only 2 sizes available
- Wire is not plastic-coated (risk of root scratching)
- Single-use design increases waste
- Less durable than TePe or Curaprox
5. Piksters Interdental Brushes
Piksters, an Australian brand that has gained a loyal following in the U.S. through online sales and dental office distribution, offers an excellent balance of quality and value. The brushes feature a patented rotating-handle design that allows the brush head to spin freely, reducing the risk of wire bending when navigating curved interdental spaces. They are available in 10 sizes (from 00 through 7), rivaling TePe's range.
The wire is plastic-coated, and the nylon filaments are tapered for gentle insertion. A pack of 40 brushes retails for approximately $8, making Piksters the best value among professional-grade options. They are reusable for several days with rinsing, and the click-lock cap doubles as a handle extender for reaching molars.
Pros
- Patented rotating handle prevents wire bending
- 10 sizes available for precise fitting
- Excellent value ($8 for 40 brushes)
- Plastic-coated wire
- Cap doubles as handle extender
Cons
- Not available in most U.S. retail stores (online only)
- Less brand recognition than TePe or GUM
- Filaments can splay faster than Curaprox CUREN
Product Comparison Table
| Brand | Sizes Available | Wire Coated? | Reusable? | Price (approx.) | Our Rating |
|---|---|---|---|---|---|
| TePe Original | 9 (ISO 0-8) | Yes | Yes (3-5 days) | $6.50 / 8 brushes | 9.3 / 10 |
| GUM Soft-Picks PRO | 3 (S, M, L) | N/A (wire-free) | No (single-use) | $5.99 / 30 picks | 8.2 / 10 |
| Curaprox CPS Prime | 6 (06-011) | Yes | Yes (5-7 days) | $12.99 / 5 heads + handle | 9.0 / 10 |
| DenTek Easy Brush | 2 (Standard, Tight) | No | No (single-use) | $3.50 / 16 brushes | 7.0 / 10 |
| Piksters | 10 (00-7) | Yes | Yes (3-5 days) | $8.00 / 40 brushes | 8.5 / 10 |
How to Use Interdental Brushes Correctly
Proper technique is simple but matters. Follow these steps for maximum effectiveness:
- Select the right size: The brush should slide in with gentle resistance. If it slides through freely without touching the sides, go up a size. If you have to force it, go down a size.
- Insert gently at the gumline: Guide the brush into the interdental space from the cheek side, angling slightly downward for upper teeth and slightly upward for lower teeth. Never force the brush.
- Move in and out 2-3 times: Use a gentle back-and-forth motion. The bristles will scrub the adjacent tooth surfaces on both sides simultaneously.
- Rinse between spaces: Run the brush under water between each interdental site to remove collected debris.
- Clean once daily: Before brushing your teeth at night is the ideal time. Some studies suggest that using the interdental brush before your regular toothbrush improves fluoride delivery to interproximal surfaces.
- Replace when worn: Discard the brush when the bristles are visibly bent, splayed, or thinned. For most brands, this is every 3 to 7 days with daily use.
Warning: Bleeding Is Normal at First
If your gums bleed when you start using interdental brushes, do not stop. Bleeding indicates existing gum inflammation (gingivitis) and is a sign that you need interdental cleaning, not that the brush is causing harm. In most cases, bleeding will diminish within 7 to 14 days of consistent daily use. If bleeding persists beyond two weeks, consult your dentist.
Special Considerations for Braces, Implants, and Bridges
Interdental brushes are essential cleaning tools for patients with orthodontic appliances, dental implants, and fixed bridges. Here are specific recommendations for each situation:
- Braces: Use interdental brushes to clean around brackets and under archwires where standard brushing cannot reach. A smaller size (ISO 0 or 1) typically works best. The GUM Soft-Picks PRO are particularly good for braces because their wire-free design cannot snag on orthodontic hardware.
- Dental implants: Implants lack the periodontal ligament of natural teeth, making the surrounding tissue more vulnerable to inflammation (peri-implantitis). Use a plastic-coated wire brush or a wire-free option like GUM Soft-Picks PRO. Never use an uncoated metal wire around implants, as it can scratch the titanium surface.
- Bridges and fixed prosthetics: Thread the brush under the pontic (the false tooth) to clean the area where it contacts the gum ridge. Larger sizes (ISO 4-6) are typically needed here. Superfloss or a floss threader can supplement the brush for very narrow access points.
Our Final Recommendations
Best Overall: TePe Interdental Brushes Original remain the gold standard. With 9 sizes, plastic-coated wire, proven clinical efficacy, and a new plant-based handle option, they are the safest and most versatile choice for the majority of adults.
Best for Sensitive Gums and Implants: GUM Soft-Picks PRO. The wire-free rubber design is the gentlest option available and is safe for use around implants and orthodontic brackets.
Best Premium Option: Curaprox CPS Prime. The CUREN filaments, reusable handle system, and surgical-grade wire deliver the most refined cleaning experience, especially for patients with periodontal history.
Best Value: Piksters Interdental Brushes. At $8 for 40 brushes with plastic-coated wire, 10 size options, and a clever rotating handle, Piksters offer professional-grade quality at the lowest per-brush cost.
Best for Beginners: DenTek Easy Brush. The most affordable and widely available option for people trying interdental cleaning for the first time.
Frequently Asked Questions About Interdental Brushes
For most adults, yes. Clinical evidence shows that interdental brushes are more effective than string floss at reducing plaque and gingivitis in accessible interdental spaces. However, if some of your tooth contacts are very tight and no brush can pass through, you should use traditional floss or dental tape for those specific sites. Many dentists now recommend using interdental brushes as the primary tool and floss only where needed.
Once daily is sufficient for most people. The best time is in the evening before brushing your teeth, so that the fluoride from your toothpaste can subsequently reach the freshly cleaned interproximal surfaces. If you have active periodontal disease, your dentist may recommend using them twice daily.
No. This is a common myth. Properly sized interdental brushes do not move teeth or widen gaps. What sometimes happens is that inflamed, swollen gum tissue shrinks back to its healthy state once the plaque and bacteria are removed, which can create the visual impression of wider gaps. This tissue change is actually a sign of healing, not damage.
It is not necessary. The mechanical action of the brush is what removes plaque. However, if your dentist has prescribed a specific interdental gel (such as a chlorhexidine gel or a high-fluoride gel), you can apply a small amount to the brush before use. Do not use regular toothpaste, as it is abrasive and can accelerate wire and bristle wear.
Children with primary (baby) teeth typically have tight contacts that do not accommodate interdental brushes. For children with spacing between teeth, or older children and teens with braces, interdental brushes can be very helpful. Always supervise use in children under 12 and consult your pediatric dentist for specific recommendations.
Sources
- Output Cochrane Database of Systematic Reviews. "Interdental brushing for the prevention and control of periodontal diseases and dental caries in adults." Cochrane Library, 2024 update.
- 'Cleaned Centers for Disease Control and Prevention. "Prevalence of Periodontitis in Adults in the United States: 2009 and 2010." Journal of Dental Research, 2012;91(10):914-20; updated NHANES data through 2024.
- 'Slot DE, Zeist FD, van der Weijden GA. "The efficacy of interdental brushes on plaque and parameters of periodontal inflammation: a systematic review." International Journal of Dental Hygiene, 2008;6(4):253-264.
- International Organization for Standardization. "ISO 16409: Dentistry -- Oral hygiene products -- Oral rinses and interdental cleaning aids." ISO, current edition.
- TePe Oral Hygiene Products. "Life Cycle Assessment of TePe Plant-Based Interdental Brush." TePe Sustainability Report, 2025.
- The American Dental Association. "Interdental Cleaners: ADA Clinical Practice Guidelines." ADA Science & Research Institute, 2024.
- ' ' ' ' ' ' ' ' ' ' ' ' 'GUM (Sunstar Americas). "Soft-Picks PRO Clinical Performance Data." Sunstar Professional, 2025.