Table 1 Definition of the six cephalometric points
From: Accuracy of 3D facial scans: a comparison of three different scanning system in an in vivo study
Cephalometric point | Definition |
|---|---|
Trichion (Tr) | The most superior midline point on the forehead, located at the hairline where the forehead meets the scalp. It is anatomically situated at the junction of the frontal bone and the anterior hairline |
Soft tissue Nasion (Na’) | The midpoint of the junction between the forehead and the nose. It corresponds to the most anterior point on the profile where the nasal dorsum transitions into the glabella, which is the smooth area between the eyebrows |
Pronasion (Prn) | The most projected point of the nasal tip, which is commonly referred to as the apex of the nose |
Left Zygion (L-Zyg) | The most lateral point on the contour of the left zygomatic arch. It corresponds to the outermost point of convexity of the left cheekbone area when viewed from the side. This point is typically located in line with the outer corner of the left eye |
Right Zygion (R-Zyg) | The most lateral point on the contour of the right zygomatic arch. It corresponds to the outermost point of convexity of the right cheekbone area when viewed from the side. This point is typically located in line with the outer corner of the right eye |
Soft tissue Pogonion (Pog’) | The most projected point of the chin |