Fig. 2

The image showing the use of ImageJ tools for calculating the crypt area and the tooth area of the mandibular second molar. A Selecting the tooth understudy from the digital OPG; B using the image enhancement tools to visualize the mineralized component of the tooth; C using the elliptical tool and drawing the outline of the crypt; and D adjusting the threshold tool to select the mineralized part of the crown of the second molar