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What Is an Ultrasonic Toothbrush?

Most Electric toothbrushes we’ve reviewed so far are considered to be ‘Sonic’ toothbrush, such as the popular Sonicare toothbrush by Philips. Oral-b is an Oscillating electric toothbrush. (we’ll talk more about the difference between them in a bit).

So what’s an ‘Ultrasonic’ toothbrush then?

For an electric toothbrush to be labeled as Ultrasonic, it has to have these features:

  • an Ultrasonic toothbrush doesn’t rely on motion to clean your teeth.
  • It uses Ultrasound to clean and clean under your gumline and not just the surface.
  • It has a maximum of 96 million ultrasonic oscillations per minute, sometimes combined with 16,000 to 18,000 sonic vibrations per minute.

Since Ultrasonic toothbrushes don’t require physical movement, you’ll find that it is very gentle on your teeth and gums. Yet, thanks to its very rapid brush movement, it breaks plaque and kills bacteria in the most effective way.

What Does an Ultrasonic Toothbrush Do?

Emmi-dent Cleaning*

One of the great benefits of using an Ultrasonic toothbrush is it’s ability to go under the gum line and not just the surface. When it penetrates below the gum line, the brush is able to get rid of bacteria that causes plaque right where it is located most in the mouth. Therefore, getting rid of the root of the problem.

With regular use, an Ultrasonic toothbrush is able to break plaque and tartar, help reduce bleeding gums and helps with Gingivitis.

Ultrasonic vs. Sonic vs. Oscillating Toothbrushes, What’s The Difference?

Emmi Dent Comparison*

While all of these toothbrushes claim to help with the same dental problems, the difference between them comes down to the mechanism in how they work, here’s the breakdown:

  • Oscillating Toothbrush: In this type of toothbrush, the brush head (usually round in shape) oscillates and pulsates around each tooth to break as much plaque around it. Using this toothbrush, you’ll have to move your brush and press gently along the gumline and around your tooth for maximum cleaning. An example: Oral B 5000 and 7000.
  • Sonic Toothbrush: Here, the brush head creates rapid vibrations (up to 31,000 per minute) to break the plaque and treat other dental problems. Using this toothbrush, you’ll also have to press the brush along your gum line. Usually, this type of toothbrush uses a long brush head similar to a traditional toothbrush, it doesn’t surround each tooth like the Oscillating brush head does. An example to this is Philips Sonicare Toothbrush.
  • Ultrasonic Toothbrush: a relatively new technology, it combines quick vibrations (up to 18,000 strokes per minute, so less than a Sonic toothbrush) with Ultrasound pulses, up to 96 Million. It is able to clean below the gum line thanks to the Ultrasound waves, this isn’t available in Sonic or Oscillating toothbrushes.

How To Clean/Brush with an Ultrasonic Toothbrush?

With an Ultrasonic Toothbrush, you don’t have to move or stroke your brush, all you have to do is place it on your teeth and it will start to send its ultrasonic waves to clean. Here’s a video that explains how it works:

What Are The Best Ultrasonic Toothbrushes to Buy?

Smilex Ultrasonic Toothbrush:

Smilex AU-300E Original Ultrasonic Electric Toothbrush

  • The Original Ultrasonic toothbrush, created by the inventor of Ultrasonic cleaning system.
  • Dual-frequency technology, it combines 96 Million Ultrasonic pulses with 18,000 strokes per minute.
  • Reduces plaque by 97% on first use.
  • reduces bleeding by 60% and Gingivitis by 28% within 30 days of use.
  • Effective at cleaning teeth and protecting gums from bleeding and Gingivitis.
  • Includes two brush heads, one soft bristle and a medium bristle.

Click here to learn more about the Smilex Ultrasonic Toothbrush, read the customer reviews and buy it.

Buy From Amazon

Emmi-dent 6 Ultrasonic Toothbrush:

Emmi-dent 6 100% Ultrasonic Toothbrush

  • Patented ultrasonic microchip produces 84 Million air oscillations to clean your teeth.
  • No brushing required. The ultrasonic waves move the bristles to clean your teeth and penetrate below your gum line to get rid of the root of bacteria causing plaque and tartar.
  • Includes specially formulated nano-bubbles are up to 1000x smaller and are able to reach between the teeth, into the smallest crevices, supporting and enhancing the cleaning effect of ultrasound.
  • Removes everyday stains (coffee, tea, smoking and wine) within a few days.
  • Includes 2 brush heads and special Emmi-dent toothpaste.

Click here to learn more about Emmi-dent 6, read the customer reviews and buy it.

Buy From Amazon

Emmi-Dent 6 vs. Smilex, Which Ultrasonic Toothbrush Should You Get?

TitleSmilex AU-300E Original Ultrasonic Electric ToothbrushEmmi-dent 6 100% Ultrasonic Toothbrush
FeatureThe Smilex Dual-Frequency Ultrasonic toothbrush reduces plaque by 97% on first brushing. Highly effective at cleaning teeth and protecting gums. from bleeding, and Gingivitis.
In just 30-days, daily brushing with the Smilex reduces bleeding gums by 60% and Gingivitis by 28%.
The only Ultrasonic Toothbrush with Dual Frequency Technology. Combines 96 million Ultrasonic pulses per minute and 18,000 Sonic bristle vibrations per minute to clean and whiten teeth while destroying plaque below the gum line.
Requires no special toothpaste. Use your favorite!
Comes complete with everything you need for better dental health the Smilex Dual Frequency Ultrasonic toothbrush; two brush heads, one soft bristle for gentle cleaning and one medium bristle for a more rigorous brushing feel; and a massaging head for healthy gums.
In comparison to other toothbrushes, Emmi-dent Ultrasound destroys bacteria and germs in the most difficult to reach areas where bristles and floss can't reach.. - up to 12 mm deep inside the tissue, protecting your teeth, gums, roots and implants.
Emmi-dent is the NO-BRUSHING TOOTHBRUSH INNOVATION that uses 100% ultrasound to clean, no brushing = no pain for sensitive teeth or receding gums.
Brighten your teeth without bleaching! or harsh chemicals! Nano-bubbles and ultrasound remove everyday stains (coffee, tea, smoking and wine) within a few days.
ReviewsRead ReviewsRead Reviews
LinkMore InfoMore Info


  • The Smilex, which is the improved and redesigned ORIGINAL Ultrasonic toothbrush which first came in the 90s (it was called Sonex back then), uses dual frequency technology. It has 96 Million ultrasonic pulses per minute PLUS 18,000 sonic vibrations per minute.
  • The Emmi-dent toothbrush only uses Ultrasonic pluses at 84 Million pulses per minute.

Brushing Method:

  • Both the Smilex and Emmi-dent require no manual brushing on your part. You simply place your brush over your teeth and it will do the cleaning.

Toothpaste Used:

  • Smilex mentions that you’re free to use your favorite toothpaste,
  • while Emmi-dent recommends using their own toothpaste for best results. The Emmi-dent toothpaste has been especially formulated with nano-bubbles that are 1000x smaller that are able to reach between your teeth to enhance the cleaning effect of Ultrasonic.

Included Accessories:

  • Smilex includes two brush heads, a medium and a soft bristle. It also includes a massaging head for your gums.
  • Emmi-dent includes 2 brush heads and their Nano-bubble toothpaste.

Ultrasonic Toothbrush Replacement Brush Heads:

Unlike Sonic toothbrushes, an Ultrasonic toothbrush (may it be Emmi-dent or Smilex) doesn’t require a different type of brush head to address different dental issues. Your choice is simply between a soft bristle or a medium one.

Because Ultrasonic brush heads have an ultrasound micro-chip embedded in them, which is the way they’re able to to their ultrasonic cleaning, we recommend you only get ORIGINAL brush heads from your toothbrush’s brand.

Here are the available replacement brush heads:

Smilex replacement Head

Smilex replacement brush heads, available as a soft bristle or medium bristle. Sold in a set of 2.

Emmi-dent E2 Replacement Brush Heads

Emmi-dent replacement brush heads, available in a set of 2 or set of 4. Also available in smaller Kids size.

Emmi Dent Toothpaste

Emmi-dent Nano-bubble toothpaste is available in Mild or Fresh flavor.

Should You Buy a Cheap Ultrasonic Toothbrush?

While researching this post, I came across a few electric toothbrushes that advertise as ‘Ultrasonic’ and are priced at less than $50, which is way less than what an actual Ultrasonic toothbrush would cost. So, why are they priced so cheaply? And should you save and buy one?

You might think that you’re getting a toothbrush at great value, but when looking at the features of these toothbrushes, you’ll see that all they offer is 40,000 Ultrasonic pulses per minute. That is WAY less than what a real ultrasonic toothbrush should offer, which is 80 to 90 MILLION. So, 40,000 vibrations per minute does NOT qualify a brush to be Ultrasonic. Click here to have a look at Wikipedia’s definition of an Ultrasonic toothbrush.

If you want to experience the real benefits of Ultrasonic cleaning, go for a real Ultrasonic toothbrush. Buying a low-quality, cheap alternative is not worth it.




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