Figure 7.

Left panel: LTh development for males (black open circle) and females (shaded gray triangles) with growth curve using a fourth degree polynomial fit for males (dashed black line) and females (solid gray line). Male versus female fits are significantly different (p<0.001). The second Y-axis reflects the percent growth for males (black, outwards tick orientation) and females (gray, inwards tick orientation). LTh defined as the distance between two lines, the first of which is drawn tangential to the anterior aspect of the maxillary and mandibular lips and the second to the posterior or buccal aspect of the maxillary and mandibular lips. Right panel: Growth rate of LTh for males (dashed black line) and females (solid gray line) as a function of age.