Table 1.

Modified lip traits classification adapted from Wilson et al [9].

Lip Traits	Description & score
Nasiolabial angle (NLA)	0 – Acute
	1 – Normal
	2 - Obtuse
Philtrum shape (PHS)	0 – Smooth/shallow philtrum
	1 – Average philtrum
	2 – Deep groove philtrum
Philtrum width (PHW)	0 – Narrow
	1 – Average
	2 – Wide
Cupid's bow shape (CBS)	0 – Flat
	1 – U-shaped
	2 – Sharp v shape
Upper lip vermillion fullness (ULVF)	0 – Thin
	1 – Medium
	2 – Thick
Lower lip vermillion fullness (LLVS)	0 – Thin
	1 – Medium
	2 – Thick
Lip commissures (LC)	0 – Upturned
	1 – Straight
	2 – Downturned
Lower lip tone (LLT)	0 – None/slight muscle tonicity
	1 – Moderate muscle tonicity
	2 – Marked muscle tonicity