The "Joker" actor's microform cleft between his lip and nose ... happen naturally because of reasons like teeth crowding or having a narrow palate on both the lower and upper set of teeth.

Neda Tahmasebifard, an assistant professor in the speech and language pathology department at Saint Mary’s College, ...

Around one in 700 babies worldwide are born with a cleft lip or palate. However ... t’ or ‘ffffffff’ with your teeth on your lips and let them watch your lips open and close as make ...