Well, I’ll be the jerk who takes the question seriously. The “dent” root with an “e” comes to English by way of French, Old French, and Latin. But the original Greek root for tooth is ὀδούς with an “o”. So, the “dont” is Greek and “dent” is Latin and they’re so similar they most likely have an early common ancestor, but I don’t see it right off. But that’s why we have dEntists and orthodOntists.