1. First of all, most chewing gum uses sucrose as a sweetener. When chewing gum, sugar stays in the mouth for a long time. Cariogenic bacteria in the mouth will use sucrose to produce acidic substances, which will corrode teeth and decalcify them, thus inducing dental caries.

Secondly, people who have filled their teeth with mercury-containing materials had better not chew gum. Studies have found that chewing gum often destroys the substances used to fill teeth in the mouth and releases amalgam, which leads to excessive mercury content in blood and urine, thus causing damage to the brain, central nervous system and kidneys. Besides, chewing gum is not good for children.

Chewing gum is a personal habit.

1. Chewing gum can exercise facial muscles, make them elastic enough, and make facial skin look more shiny.

2. Chewing gum can make gums more stable. As people say, late tooth loss is rare.

Chewing gum can make your breath fresh, which should be a common understanding of chewing gum by many people.

Extended data:

Benefits: Chewing gum can remove food residue from the tooth surface, chewing exercise and mechanical stimulation can increase saliva secretion, rinse the oral surface, and have a certain effect on cleaning the oral cavity. Children should not eat more, each time 1 tablet, no more than 2 tablets a day.

Disadvantages: Chewing gum also contains plasticizer, which is slightly toxic. In the process of blowing bubbles, you constantly spit out your tongue, stick out your tongue, and habitually chew with one side of your teeth, which will lead to uneven maxillofacial development and dentofacial deformity. It is easy for children to swallow chewing gum into esophagus or bronchus by mistake, which will be life-threatening.

References:

Baidu encyclopedia entry chewing gum