Elephants go through six sets of large, brick-like teeth that grow in at the back of their mouths and slowly move to the front as they are worn down. The teeth then fall out and are replaced by fresh ones.Each set of elephant teeth that grows in is larger than the last. The final teeth are over eight inches long from front to back and weigh more than eight pounds .When an elephant's final set of teeth falls out, the elephant slowly dies of malnutrition or starvation.