Many Victorians enjoyed sugary treats in amounts unimaginable to the previous generations. This combined with poor hygiene and dentistry only in its infancy caused high levels of tooth decay. In many cases the rotting teeth couldn’t be saved and had to be extracted, leaving people with rather toothless smiles. Not all was lost though, at least not to those who could afford a nice set of dentures.
Replacement teeth were traditionally made of ivory (like walrus, hippopotamus, or elephant), but could be prone to breaking and discoloring. A better solution turned out to be making ivory-based dentures set with … real human teeth. There were a few popular ways to obtain those: buying them from the poor, forcing them out of unfortunate victims (often enslaved people), and using resurrectionists’ services to dig up some teeth from graves or ransack casualties at battlefields. It is said that one of the biggest teeth scavenging took place after the Battle of Waterloo, giving the name to “Waterloo teeth”.
Check out photos of real Waterloo teeth in this BBC article.