The ratio R33/R77X increased significantly from 0.57 in tapered arch form to 0.59 in ovoid form and 0.61 in square form, but the ratios D13/R33 and D13/D17X significantly decreased from 0.27 and 0.21 in tapered form to 0.24 and 0.19 in ovoid form and were the lowest at 0.19 and 0.16 in square form.