In addition to the above 4 steps recommended by the American Dental Association (ADA), antibacterial mouth rinses reduce bacteria in the mouth that cause plaque and gum disease, according to the ADA. Fluoride mouth rinses also help reduce and prevent tooth decay. The ADA does not recommend fluoride mouth rinses for children 6 or younger because they may swallow the rinse.
Source: http://www.webmd.com/