Fig. 1From: Predictability of crowding resolution in clear aligner treatmentMeasurements: upper and lower arch widths, arch length, and interproximal enamel reduction. A–C Intercuspid width: linear distance between inner lingual points; interpremolar width: linear distance between inner lingual points; intermolar width: linear distance between inner lingual points; D arch length: the perpendicular to a line connecting the contact point passing through the buccal point; E Interproximal enamel reduction: the difference between mesiodistal diameter at T0 and T1Back to article page