Class II Div I :This malocclusion is common, with an estimated prevalence of 15−20%. :There is racial variation with Class II division 1 more common in Caucasian than Latin American, Middle Eastern and Asian populations, and lowest in Black racial groups.
Overjet
Isochronic tones
Skull bossing
Triangular face
Stunt 
Dichotic pitch
Calcaneal pitch
Oak wilt