If greater than 0.50 to 1 mm of interproximal space exists between two adjacent teeth (fig. 31), then 1 point is scored for that interproximal contact. If more than 1 mm of space is present between two teeth (fig. 32), then 2 points are scored for that interproximal contact. No more than 2 points are scored for any contact that deviates from ideal.

figure 31                                                      figure 32

The relative angulation of the roots of the maxillary and mandibular teeth is assessed on the panoramic radiograph. Although this is not ideal, it gives a reasonably good assessment of root position. Generally, the roots of the maxillary and mandibular teeth should be parallel to one another and oriented perpendicular to the occlusal plane (fig. 33). If this situation exists, then no points are scored.

figure 33

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