Table 1.

Modified Terzis’ Lower Lip Grading Scale⁴

Original Terzis’ Scale	Modified Scale	Designation	Description
0	1	Poor	Total paralysis
0.5	2	Fair	Trace contraction with no movement
1	3	Moderate	Observable movement but inadequate excursion and without symmetry
1.5	4	Good	Almost complete excursion of lower lip with depression and full denture smile
2	5	Excellent	Normal symmetric movement of lower lip