Page 157 - My FlipBook

Fig. 84. Caries of enamel. d. Dentin. e. Enamel. x. Area of decay. In this figure the
outer ends of the enamel rods have been broken away in grinding. Notice particularly the flamelike
tongues of penetration sweeping toward the dento-enamel junction, following the lines of the length of
the enamel rods. Also the penetration on the margins of the principal area are seen to follow the
This rigid following of the enamel rods is a characteristic of
lines of the length of the enamel rods.
caries of enamel beginning in smooth surfaces.