3. Cheek flexibility (CF) was measured according to the method described by Bailoor and Nagesh. Two points were marked, one on each side of the face at 1/3rd the distance from angle of the mouth on a line joining the tragus of the ear and the angle of the mouth. The distance measured between these two points was V2. The subject was asked to blow his cheek fully and the distance measured between the same two points was V1. CF=V2-V1.