Fig. 5. Illustration describing the predictive method for localization of AIOF in clinical practice. (A) Mark the location of ANS at the uppermost part of philtrum at the level of nostrils and Z at the lowest bony prominence of cheek. Draw line A between ANS and Z. (B) Mark at the middle of line A (black dot line). (C) Draw perpendicularly with and above line A at approximately 19 mm. (D) Mark the location of predicted AIOF. A, distance from ANS to Z; AIOF, accessory infraorbital foramen; ANS, anterior nasal spine; Z, the lowest point of the zygomaticomaxillary junction.
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