Model Analysis of Digital Models in Moderate to Severe Crowding: In Vivo Validation and Clinical Application

Figure 1

Linear measurements used in this study. (A) Tooth width measurement; the greatest width of the posterior tooth in the occlusal view; the greatest width of the anterior tooth in the labial view. (B) Sectional arch length was measured in four separate segments. a, d: posterior sectional arch length; length between the mesial contact point of the first molar and the distal contact point of the canine. b, c: anterior sectional arch length; length between the distal contact point of the canine and the mesial contact point of both central incisors. (C) a, b: arch width; the distance between the cusp tips of both canines and both first molars. c: arch length; the distance from the line connecting the distal surface of the first molars to the contact point between the central incisors. (D) a: overjet. (E) b: overbite.