| 0 | no plaque |
| 1 | separate flecks of plaque present at the cervical margin |
| 2 | continuous band of plaque up to 1 mm at the cervical margin |
| 3 | a band of plaque that is wider than 1 mm but covering less than one-third of the side of the crown of the tooth |
| 4 | plaque covering at least one-third but less than two-thirds of the side of the crown |
| 5 | plaque covering more than two-thirds of the side of the crown |
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