There's a reason nerdy preteen Dustin Henderson doesn't have any front teeth in seasons one and three of 'Stranger Things.'<br />According to CNN, it's because actor who plays him, Gaten Matarazzo III, has a rare bone condition.<br />He was born with cleidocranial dysplasia, or CCD, a rare disorder which primarily affects growth of teeth and collarbones.<br />Like many celebrities, Matarazzo is using his new fame to bring attention to the condition.
