What can three months of use do with a new toothbrush? [video]

How long have you not changed your toothbrush? If she's about three months old, go to the market and buy a new one right now! It turns out that, as the latest video posted by Applied Science shows, nylon rods wear out quickly, which diminishes the effectiveness of plastic bristles.

Each “hair” of a standard brush is about 200 micrometers in diameter and, when new, has a series of splinters and irregularities that help remove dirt. To demonstrate just how much change is required regularly, the specialized channel for producing videos captured by an electron microscope placed the rods of a new brush next to a used one.

Some grams of toothpaste were also placed under the magnifying glass, and after some drying and electron bombardment testing of the material, grains between 20 and 30 micrometres in diameter could also be observed. The way the capture of the images was done is still described in the running of the video. More striking recorded by microscopes and magnetic resonance machines, for example, can be seen here (Applied Science).

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