Which of the following is NOT a skin point used to delimit the floors of the face?

Which of the following is NOT a skin point used to delimit the floors of the face?

• A. Tr-Of-Sn
• B. Tr-Of-Gn
• C. Tr-N-Sn
• D. Tr-Of-St-Gn

Answer: (D)

Delimiting the floors of the face relies on a chain of midline soft-tissue skin landmarks that define the vertical extent from the hairline down to the chin. The points used are stable, repeatable references like trichion at the hairline, nasion or subnasale along the nasal region, and gnathion at the chin. Stomion, however, is the point at the mouth opening and is mainly used for lip posture measurements, not as a boundary for the facial floors. So a sequence that includes stomion does not fit the standard set used to delimit the floors of the face, making that option the one that does not belong.

Delimiting the floors of the face relies on a chain of midline soft-tissue skin landmarks that define the vertical extent from the hairline down to the chin. The points used are stable, repeatable references like trichion at the hairline, nasion or subnasale along the nasal region, and gnathion at the chin. Stomion, however, is the point at the mouth opening and is mainly used for lip posture measurements, not as a boundary for the facial floors. So a sequence that includes stomion does not fit the standard set used to delimit the floors of the face, making that option the one that does not belong.