Gingival Depigmentation Using Diode 980 nm and Erbium-YAG 2940 nm Lasers: A Split-Mouth Clinical Comparative Study

Table 2

Indices used for evaluation of the gingival pigmentation.

Grade	Degree of pigmentation index (DOPI)	Grade	Melanin index (Hedin)
0	No clinical pigmentation (pink-colored gingiva)	0	No pigmentation
1	Mild clinical pigmentation (mild light brown color)	1	One or two solitary unit(s) of pigmentation in papillary gingiva without the formation of a continuous ribbon between solitary units
2	Moderate clinical pigmentation (deep brown to black).	2	More than three units of pigmentation in papillary gingiva without the formation of a continuous ribbon
3	Severe clinical pigmentation (mixed color)	3	One or more short continuous ribbons of pigmentation
		4	One continuous ribbon including the entire area between canines