The little bugs in the teeth refer to worm teeth, also known as dental caries, and it is not true that there are bugs present in the teeth, this is just a way of saying it. Dental caries is a common disease in which dental tissues are gradually destroyed. Caries just starts on the surface of the crown of the tooth, and if the patient does not treat it in time and allows it to continue to develop, a cavity will gradually form, and eventually the crown of the tooth will be completely destroyed and disappear. Dental caries is mostly caused by bacterial infection, need to go to the regular hospital in time to do filling surgery to treat, so that the teeth to restore the original chewing function and shape. Patients should not chew with the affected side of the tooth within 72 hours after filling, otherwise it will affect the effect of the surgery, usually pay attention to maintain oral hygiene, develop the habit of brushing in the morning and evening, and go to the hospital for regular review.