Table 1 Landmarks and measurements used in the study
| Â | Definition |
|---|---|
Landmarks | Â |
SN | Subnasale: the point at which the nasal septum merges with the upper lip |
LS | Labrale superius: the midpoint of the upper vermilion line |
STO | Stomion: the most inferior point on the upper lip |
CPHL | Crista philtri left: the point on the left elevated margins of the philtrum above the vermilion line |
CPHR | Crista philtri right: the point on the right elevated margins of the philtrum above the vermilion line |
CHL | Cheilion left: the point located at the left labial commissure |
CHR | Cheilion right: the point located at the right labial commissure |
UI | Upper incisor: the tip of the maxillary central incisors |
F | The central top point of the acrylic flange border |
FS | The intersection of the parallel line of UI-LS through point F and the surface of the soft tissue |
OCL | Left outer canthus point: the outermost point at the commissure of left eye's upper and lower eyelids |
OCR | Right outer canthus point: the outermost point at the commissure of right eye's upper and lower eyelids |
N | Nasion: most anterior point of the frontonasal suture where the lines of the glabella profile meet those of the nasal bones |
Measurements | Â |
SN-LS | Upper white lip length |
CPHL-CPHR | Philtrum width |
CHL-CHR | Mouth width |
LS-STO | Upper vermillion height |
ULT | Upper lip thickness: distance between LS and the most anterior point of the maxillary incisor |
ULL | Upper lip length: distance between SN and LS |