As stated before, polymorphisms in DRD2 related to bruxism phenotypes in children (42) is a genetic variation in the dopamine receptor D2 (DRD2) that may alter dopamine signaling and modify the rewarding effects of food (64) and videogame playing (65) and could explain the relationship between SB, sugar, and screen overuse (34). The gene discussed is DRD2; the disease is bruxism.