Table 2.
Landmark definitions for asymmetry evaluation.
| Frontal View | ||
|---|---|---|
| 1. | Zygomaticofrontal suture (ZFS) | Intersection of zygomatic frontal suture and lateral orbital margin |
| 2. | Infraorbital foramen (IOF) | Medial point of infraorbital foramen |
| 3. | AMC | Alveolar crest over maxillary first molar (AMC) |
| 4. | Ante gonial notch (AGN) | Deepest point of ante gonial notch of mandible |
| 5. | Gonion (Go) | Point along angle of mandible midway between lower border of mandible and posterior ascending ramus |
| 6. | Pyriforme (Py) | The most lateral aspect of the piriform aperture |
| 7. | Malare(Mf) | Most prominent anterolateral point on the zygomatic bone that lends the malar prominence to the face |
| 8. | Lower first molar (LFM) | Crest of bone buccal to mandibular first molar |
| 9. | Mental foramen (MF) | Foramen located on anterior surface of the mandible |
| Axial View | ||
| 10. | Zygomatic arch (ZA) | A point at the most lateral surface of the zygomatic arch near thezygomatic-maxillary suture |
| 11. | CMP | Crest of bone palatal of maxillary 1st premolar region (CMP) |
| 12. | CMM | Crest of bone palatal of maxillary 1st molar region (CMM) |
| 13. | Malare (Ma) | Most prominent antero-lateral point on the zygomatic bone that lends the malar prominence to the face |
| 14. | Porion (Po) | Centre of the tangent connecting the anterior and posterior bony limits of the lateral extent of the external auditory meatus. |