<unk>  is the extent of horizontal (anterior-posterior) overlap of the maxillary central incisors over the mandibular central incisors. In class II (division I) malocclusion the<unk>  is increased as the maxillary central incisors are protruded. Class II Division I is an incisal classification of malocclusion where the incisal edge of the mandibular incisors lie posterior to the cingulum plateau of the maxillary incisors with normal or proclined maxillary incisors (British Standards Index, 1983). There is always an associated increase in<unk> . In the Class II Division 2 incisal classification of malocclusion, the lower incisors occlude posterior to the cingulum plateau of the upper incisors and the upper central incisors are retroclined. The<unk>  is usually minimal but it may be increased.
Overjet
Isochronic tones
Skull bossing
Triangular face
Stunt 
Dichotic pitch
Calcaneal pitch
Oak wilt