Teeth grow in the mouth. As the saying goes, "articulate" means that people can speak well when interacting with others, so teeth are closely related to a person's interpersonal communication. If you dream that you have lost your teeth or your teeth are loose, it is likely that you have had a quarrel with others, or that you are caught in some kind of interpersonal relationship, which makes you speechless, or that you are worried that you are always inarticulate on some occasions.