3.1 Head
3.1.2 Centre of the Face and
Nasal Region
Cheek bones (Figs 3.12, 3.13)
Both the maxilla and the zygoma form the cheek bones below
the eyes. Important anatomical landmarks are the infraorbital
foramen, the lower border of the zygoma and the zygomatic arch
of the temporal bone.
Infraorbital foramen (Figs 3.12, 3.13)
With the patient looking straight ahead, the infraorbital foramen
with ST-2is located on the maxilla, directly below the pupil.
The foramen lies 1 finger-width below the infraorbital ridge. By
palpating inferiorly from there, it can be felt below the maximal
curvature of the ridge, in a small depression that is often sensi-
tive to pressure.
ST-2
S.I.-18
Zygomatic bone
(zygoma)
Maxilla
(upper jaw)
Infraorbital foramen
Fig. 3.12
Apertura piriformis
Frontal squama
Zygomatic
bone
Orbit
ST-2
Infraorbital
foramen
Maxilla
S.I.-18
Fig. 3.13
Infraorbitalmargin ST-2
Fig. 3.14