Skin expansion in pediatric forehead reconstruction. Case study I: Simultaneous forehead, anterior and posterior scalp expansion. Temporal evolution of normalized total area, elastic area, and growth area upon gradual expander inflation, 0.0 < t ≤ 0.125, constant pressure 0.125 < t ≤ 0.75, and deflation 0.75 < t ≤ 1.0. The expanded area increases from 149.4 cm2 to 251.2 cm2, corresponding to a final fractional area gain of 1.68. Vertical dashed lines correspond to the time points displayed in Figure 7.