Table 1 Landmarks of the nasolabial folds and its peripheral soft tissues
Landmarks | Definitions |
|---|---|
Nasolabial folds | |
NLF1L | The left upper nasolabial folds (At the level of the subnasal of the left nasolabial fold) |
NLF2L | The left middle nasolabial folds (At the level of 7.5 mm vertically downward from the Subnasal of the left nasolabial fold) |
NLF3L | The left lower nasolabial folds (At the level of 15 mm vertically downward from the subnasal of the left nasolabial fold) |
L′ | Outside of the left nasolabial folds (0.5 mm out of the NLF2L level) |
L′′ | Inside of the left nasolabial folds (0.5 mm inward of the NLF2L level) |
NLF1R | The right upper nasolabial folds (At the level of the subnasal of the right nasolabial fold) |
NLF2R | The right middle nasolabial folds (At the level of 7.5 mm vertically downward from the subnasal of the right nasolabial fold) |
NLF3R | The right lower nasolabial folds (At the level of 15 mm vertically downward from the subnasal of the right nasolabial fold) |
R′ | Outside of the right nasolabial folds (0.5 mm out of the NLF2R level) |
R′′ | Inside of the right nasolabial folds (0.5 mm inward of the NLF2R level) |
Lips | |
ChL | Cheilion left (Left corner of the mouth) |
ChR | Cheilion right (Right corner of the mouth) |
ULP | Upper lip (Most prominent point of the upper lip) |
LLP | Lower lip (Most prominent point of the lower lip) |
Ls | Labrale superior (Highest point of the lower lip) |
Li | Labrale inferior (Lowest point of the lower lip) |
CphL | Crista philtri left |
CphR | Crista philtri right |
STM | Stomion (Midpoint of upper and lower mouth cracks) |
Cheeks | |
CkL | Cheek left (The intersection of the horizontal extension line passing through the midpoint of the left nasal alar and the vertical extension line passing through the left exocanthion) |
CkR | Cheek right (The intersection of the horizontal extension line passing through the midpoint of the right nasal alar and the vertical extension line passing through the right exocanthion) |
BuL | Buccal left (The intersection of the horizontal extension line passing through the left corner of the mouth and the vertical extension line passing through the left exocanthion) |
BuR | Buccal right (The intersection of the horizontal extension line passing through the right corner of the mouth and the vertical extension line passing through the right exocanthion) |
Perioral soft tissues | |
TN | Tip of nose |
Sn | Subnasale |
A′ | Soft-tissue A-point |
B′ | Soft-tissue B-point |
Pog′ | Soft-tissue pogonion |
Me′ | Soft-tissue menton |