Teeth falling out
Psychological (Freud)
Teeth falling out is among the most common anxiety dreams and can mirror a deep sense of lost control, helplessness, or fear of losing strength and attractiveness. In depth psychology it often touches on themes of aging, shame, or repressed aggression.
Oriental reading
In classical Oriental interpretation teeth are often linked to relatives and to one's lifespan, so their falling out may, depending on the reading, point to separation, loss, or the dwindling of something familiar. Yet some interpreters also see in it the settling of a debt or the laying down of a burden.
Body
Dream interpretation is for self-reflection and entertainment — it is not a medical or psychological diagnosis.