If the toothbrush is soft hair, the comfort is relatively high, which can effectively reduce the irritation to teeth and reduce the occurrence of tooth bleeding and pain, but the cleaning power of soft hair is usually weak, so it is only suitable for some people with dentin allergy.

If bristles are used, the cleaning power will be stronger, which can effectively remove thicker dental plaque and calculus, but it is also easy to cause symptoms such as gingival atrophy, wedge-shaped defect of the neck and gingival bleeding. It is only suitable for people who smoke or deposit calculus easily, so toothbrush bristles and bristles have their own advantages, and everyone can choose according to their own needs.

2 How can bristles become soft if they are too hard? It is recommended to change the toothbrush.

Generally, bristles will become soft and deformed only after being used for a long time. If the bristles are too hard, continuing to use them will do harm to dental health. Therefore, it is suggested to use soft bristles directly instead.

If you don't have a replaceable toothbrush, you can soak it in hot water and vinegar, because both hot water and vinegar can temporarily soften the bristles.

The reason why the toothbrush stinks after being used for a long time is that there are many bacteria in the mouth, and there is protein in saliva, and a small part of it will remain on the toothbrush when brushing. If the toothbrush itself has no disinfection measures and has been placed in a dark environment, it will inevitably smell with the extension of use time. However, when the toothbrush stinks again, it generally means that the service life of the teeth is up and needs to be replaced.

It is best to change the toothbrush every few months, about 1-3 months.

If the toothbrush is used for a long time, the bristles will be damaged and fall off If it is used continuously, the efficiency, cleanliness and angle of brushing will be affected.

Moreover, if the teeth are used for a long time, bacteria will also breed. If you continue to use it, your teeth will not be cleaned and oral diseases will occur. Therefore, the toothbrush is usually replaced once every 1-3 months.