What is an ultrasonic toothbrush and how do they work?

What is an ultrasonic toothbrush and how do they work?

A friend of mine got an ultrasonic toothbrush for her birthday. As I have never heard of that before I was interested in how they work.

My sister works in a dentist practice so I asked her about ultrasonic toothbrushes and she told me that dentists actually recommend them as they clean the teeth in the most soft and thoroughly way.

But what is so special about ultrasonic toothbrushes and what is the difference to normal sonic toothbrushes?

The short answer is that Ultrasonic toothbrushes unlike sonic ones do not rely on a physical motion to clean the teeth.

An ultrasonic toothbrush is one that uses a very high frequency of vibration referred to as ultrasound to remove plaque and bacteria from the teeth (to a certain degree even tartar).

comparison
To be classified as such, the brush has to emit a wave of 20,000Hz or 2,400,000 movements per minute, considerably more than the very popular sonic technology.

bacteria
The high frequency waves, but low in amplitude means the bacterial chains found in the mouth that make up plaque are broken up by the vibration.

cleaning
They can work as far as 5-12 mm below the gumline.

The brush can clean the teeth simply by resting the brush on it though many ultrasonic use extra sonic waves to better remove the broken bacteria chains.

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