Evaluation of Growth and Development of Late Mixed Dentition Upper Dental Arch with Normal Occlusion Using 3-Dimensional Digital Models

Figure 1

(a) Illustration of UAAL and UTAL. UAAL: connecting points b and c, the vertical distance from point a to the connecting line between point b and point c; UTAL: connecting points d and e, the vertical distance from point a to the connecting line between point d and point e. (b) Illustration of the UICW, UIMW, and UDAL. UICW: connecting points b and c gives line h, which represents the UICW; UIMW: connecting points f and g gives line i, which represents the UIMW; UDAL: connecting points a and d gives line j; and connecting points a and e gives line k. UDAL = line j + line k. (c) Illustration of plane 1, UAAH, and UTAH. Plane 1: established by l, m, and n points; UAAH: the distance from the highest point toward the canine on the midline palatine suture to plane 1; UTAH: the distance from the highest point toward the maxillary first molar on the midline palatine suture to plane 1.

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