If you dreamed about teeth in a newborn baby's mouth: You may turn to business on different subjects, Unexpected developments may affect your long-term plans or cooperation. To see teeth in the mouth of a newborn baby in a dream portends good luck. This is a sign that one's fortune is clear, raising more than one baby, and a happy family life. Having teeth in a newborn baby's mouth is also seen as a harbinger of living a healthy life.