Dustin's Missing Teeth Are Based on a Real Condition Gaten Matarazzo Has
Dustin's claim that he has 'no collarbones' actually points to a genuine condition called cleidocranial dysplasia, which Gaten Matarazzo was born with. The Duffers wrote it directly into the show as an explanation for why the character was missing teeth in the earlier seasons, turning something very personal to the actor into part of Dustin's identity.
