" Most fans of forensic books and television shows are aware that the biochemical building blocks of DNA can be assembled in many billions of different ways, ensuring that no two people—except for identical twins—will possess the same genetic “fingerprint.” Not many of those same people realize that there are likewise billions of possible combinations of tooth shapes, sizes, orientations, and anomalies, including cavities, fillings, chips, and distinctively shaped roots. Although identical twins can’t be distinguished from one another by their DNA, they can be told apart by their teeth. "

― William M. Bass , Beyond the Body Farm: A Legendary Bone Detective Explores Murders, Mysteries, and the Revolution in Forensic Science