What’s the difference between a sonic toothbrush, or an ultrasonic toothbrush?
Nowadays, with the improvement of living standard, people often ask a question: if I want to buy an electric toothbrush, which type should I choose? As such a personal thing, which toothpaste is more cost-effective? Before purchasing, the Vsimle team let us know the history of electric toothbrushes and the classification of electric toothbrushes:
History of electric toothbrush
At the beginning, electric toothbrushes were used by the disabled and the lazy. The history of the common manual toothbrush is unexaminable. There are different records in China and Europe. The toothbrush has come a long way. Electric toothbrushes have a shorter history, appearing in the middle of the 20th century but developing rapidly. Electric toothbrushes were originally designed for people with disabilities who have muscular weakness in their hands. Electric toothbrush is also used to cultivate children’s interest in brushing their teeth. There are even electric toothbrushes for babies. Because it is electric, many lazy people also use it.
Classification of electric toothbrush
Electric toothbrush can produce automatic and rapid bristle vibration, before and after oscillation or oscillation in the way of rotation (brush head to clockwise and counterclockwise rotation alternately), so as to achieve the effect of cleaning teeth. The rotating electric toothbrush is powered by a driving motor, making the toothbrush vibrate at or below the speed of sound. Ultrasonic fluctuations in an ultrasonic toothbrush are caused by piezoelectric crystals. Modern electric toothbrushes are usually powered by a battery, which is usually charged wirelessly by placing the toothbrush on a charging dock when not in use.
Electric toothbrush can be divided into two categories according to its vibration mode: vibration type and vibration rotation type. When using a vibrating toothbrush, it is recommended to brush your teeth in a manner similar to manual brushing. When using a vibrating rotating toothbrush, it is recommended to slowly move the toothbrush from one tooth to another for cleaning.
Electric toothbrush also can be divided into general electric toothbrush, sonic toothbrush or ultrasonic toothbrush according to the vibration frequency (speed) of the brush head.
The sonic toothbrush is a type of electric toothbrush that vibrates fast enough to produce vibrations in audible audio range. Most brands of modern rechargeable electric toothbrushes fall into this category, with frequencies ranging from 200 to 400 Hz, or 12,000-24,000 oscillations, or 24,000-48,000 fluctuations per minute. Because sonic toothbrushes rely on the action of brushing to clean teeth, the action produced by them usually has a high amplitude. In other words, sonic toothbrushes have a large amplitude of brushing action.
Ultrasonic toothbrush is the most advanced product of electric toothbrush, which USES ultrasonic wave to clean teeth. To be called an “ultrasonic toothbrush,” a toothbrush must emit at least 20,000 Hz (equivalent to 2,400,000 vibrations) per minute. In general, ultrasonic toothbrushes approved by the us food and drug administration (FDA) vibrate at a frequency of 1.6 MHz, equivalent to 192 million vibrations per minute.
Ultrasonic toothbrushes emit high frequency but low amplitude fluctuations. These fluctuations can disrupt the chain of bacteria that causes plaque and prevent plaque from sticking to the surface of the tooth to a depth of 5 millimeters below the gum line.
Some ultrasonic toothbrushes only provide ultrasonic vibration. Other ultrasonic toothbrushes offer additional sonic vibrations, up to 9,000 to 40,000 vibrations per minute, comparable to sonic toothbrushes, to provide additional sweeping action and speed up the removal of food scraps and residual bacterial chains. These ultrasonic toothbrushes may have lower amplitudes than sonic toothbrushes with similar frequencies because ultrasonic toothbrushes do not need to remove bacterial chains through sonic vibrations. These bacterial chains have been destroyed by ultrasonic waves and can be removed with a simple sweep.
Because the terms “ultrasonic” and “sonic” are so similar, the two are often confused in the marketplace, and sonic toothbrushes are often mislabeled as ultrasonic toothbrushes. The “sonic” toothbrush is one that produces less than 2,400,000 fluctuations per minute (20,000 Hz). It is called a “sound wave” because of its operating frequency, which, for example, fluctuates between about 20 and 20,000 Hz per minute in the range of human hearing. Technically, only a toothbrush that emits an ultrasonic wave, or one that fluctuates beyond the upper limit of human hearing, can be called an “ultrasonic” toothbrush.
Therefore, in the selection of sound or ultrasonic electric toothbrush, the specific or depends on the frequency to choose.