4. Bolton’s Tooth size ratio
• Overall ratio
= mesiodistal width of all mand (12) teeth x 100
mesiodistal width of all max (12) teeth
= 91.3 %
. Anterior ratio
= mesiodistal width of all anterior mand (6) teeth x 100
mesiodistal width of all anterior max (6) teeth
= 77.2 %
15. Huckaba’s Analysis
X Y
True width of premolar on cast x True width of primary molar on cast
True width of premolar on x-ray True width of primary molar on x- ray
x’ Y’
X = Y x X
Y’