Mouthwash is a liquid that is used to rinse the mouth and freshen breath. It is typically used after brushing the teeth, and can help to remove plaque and bacteria from the mouth. Some mouthwashes also contain ingredients that can help to whiten teeth or prevent cavities.
Dentists can often tell if a patient uses mouthwash by the appearance of their teeth and gums. Mouthwash can help to reduce plaque and bacteria, which can lead to whiter teeth and healthier gums. Additionally, some mouthwashes contain ingredients that can help to strengthen teeth and prevent cavities.