In both maxillary and mandibular arches, marginal ridges of adjacent posterior teeth shall be at the same level, or within 0.50 mm of the same level (fig. 6).

figure 6

In scoring, do not include the canine-premolar contact; and do not include the distal of lower 1st premolar.

If adjacent marginal ridges deviate from 0.50 to 1 mm (fig. 7), then 1 point shall be scored for that interproximal contact. If the marginal ridge discrepancy is greater than 1 mm (fig. 8), then 2 points shall be scored for that interproximal contact. No more than 2 points will be subtracted for any contact point. The marginal ridge will be considered as the most occlusal point that is within 1 mm of the contact at the occlusal surface of adjacent teeth.

figure 7                                                figure 8

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