Table 1 Definitions of occlusal and mandibular measurements.

Upper arch

Maxillary intercanine width

Distance between upper canines' cusp tips

Maxillary first premolar width I

Distance between upper first premolars' buccal cusp tips

Maxillary first premolar width II

Distance between upper first premolars' central fossae

Maxillary second premolar width I

Distance between upper second premolars' buccal cusp tips

Maxillary second premolar width II

Distance between upper second premolars' central fossae

Maxillary intermolar width I

Distance between upper first molars' mesiobuccal cusp tips

Maxillary intermolar width II

Distance between upper first molars' central fossae

Lower arch

Mandibular intercanine width

Distance between lower canines' cusp tips

Mandibular first premolar width I

Distance between lower first premolars' buccal cusp tips

Mandibular first premolar width II

Distance between lower first premolars' central fossae

Mandibular intermolar width I

Distance between lower first molars' mesiobuccal cusp tips

Mandibular intermolar width II

Distance between lower molars' central fossae

Mandibular body length

Distance between gonion and menton

Ramus height I

Distance between gonion and condyle

Ramus height II

Distance between gonion and coronoid

Intercondylar width

Distance from the external face of one condyle to the other

Intercoronoid width

Distance from the apex of one coronoid process to the other

Gonial angle

Angle formed by the intersection of the inferior border of themandible and the posterior border of the ramus