If you lost a tooth as a result of an injury: the best way is an immediate (less than 5 minute) replantation. — physically replacing the tooth into its socket. If it is an upper tooth place the other hand on top of the person's head to stabilize it then push firmly and hold the tooth in place. Sustained pressure is required to move blood that has accumulated in the socket.
Read more: https://www.zakdental.com/tooth-avulsion/