Table 1.

List of reference points based on the anatomical landmarks for morphometric measurements

Abbreviations	Points
Po	The most posterior point on the cranial vault.
N	A point on the nasofrantal suture.
A	The most anterior point on the nasal bone.
E	The intersection between the frontal bone and the most superior-anterior point of the posterior limit of the ethmoid bone.
So	The intersection between the posterior border of the basisphenoid and the tympanic bulla.
Pr	The most inferior and anterior point on the alveolar process of the premaxilla.
Bu	A point on the premaxilla between jaw bone and the lingual surface of the upper lingual incisors.
Iu	The most prominent point between the incisal edges of the upper incisors.
Mu	A point on the intersection between the maxillary bone and the mesial surface of the upper first molar.
Ii	The most prominent point between the incisal edges of the lower incisors.
Id	The most inferior and anterior point on the alveolar process of the mandible.
Mn	A point in the deepest part of the antegonial notch curvature.
Ml	A point on the intersection between the mandibular alveolar bone and the mesial surface on the first molar.
Bl	A point on the intersection between the lingual surface of the lower incisors and the most anterior part of the lingual alveolar bone.