To dream we lose teeth is a symbol of frustration, castration or failure. To a man the dream of lacking teeth, especially because the teeth have decayed and fallen out, reflects fear of losing his virility or a defeat in life. To a woman it also means fear of growing old and in the case of being pregnant, fear of a difficult birth. It also depends on which teeth are lost. The incisors are figurative teeth. They symbolize external appearance, fame, celebrity and beauty. The canine tooth symbolizes rage and aggression. The molar tooth symbolizes stubbornness and perseverance.
Read more about dreaming of Toothless, Teeth in other dream meanings interpretations.