Table 1 Distribution of patients on three clinical different groups. Mucogingival line was distinctive in cases of pronounced changes of coloring in group 3
| mucogingival line | ||
|---|---|---|
| mucosa | distinct | not distinct |
| group 1: light | 4 | 10 |
| group 2: dark | 5 | 12 |
| group 3: combined | 16 | 7 |