Which option correctly identifies the skin points that delimit the floors of the face?

Which option correctly identifies the skin points that delimit the floors of the face?

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

Answer: (D)

Two soft-tissue boundaries divide the face into an upper and a lower facial height, and these are marked by specific skin landmarks: tragion (Tr) at the ear region, nasion (N) at the nasal root, subnasale (Sn) where the nose meets the upper lip, and gnathion (Gn) at the chin. The upper boundary of the face is traced with Tr–N–Sn, while the lower boundary extends from Sn to Gn. To delimit both floors of the face, you need all four landmarks in sequence: Tr–N–Sn–Gn. Any option that misses one of these points or introduces an unrelated landmark fails to define both floors.

Two soft-tissue boundaries divide the face into an upper and a lower facial height, and these are marked by specific skin landmarks: tragion (Tr) at the ear region, nasion (N) at the nasal root, subnasale (Sn) where the nose meets the upper lip, and gnathion (Gn) at the chin. The upper boundary of the face is traced with Tr–N–Sn, while the lower boundary extends from Sn to Gn. To delimit both floors of the face, you need all four landmarks in sequence: Tr–N–Sn–Gn. Any option that misses one of these points or introduces an unrelated landmark fails to define both floors.