arch

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Squarish, tapering and ovoid arch forms were determined on two hundred and fifty maxillary casts by applying two different methods (Mathematical formula proposed by Noroozi3 and using diagnostic orthoform templates marketed by 3M Unitek.
The squarish, tapering and ovoid arch forms were determined by using the formula of arch width and depth suggested by Noroozi (Wc/Wm)x(Dc/Dm).
Nojima et al10 used tapered, square and ovoid arch form templates to evaluate the arch forms of angle class I, II and III cases in both Japanese and Caucasian samples.