CARIES OF ENAMEL
Smooth surface Caries:
Due to plaque formation on enamel. The earliest manifestation of incipient
caries (early caries) of enamel is usually seen beneath dental plaque as areas
of decalcification (white spots).
The first change seen histologically is the loss of inter-rod substance of
enamel with increased prominence of the rods.
-this is followed by the loss of mucopolysaccharides in the organic substance.
-presence of transverse striations of the enamel rods,
- accentuated incremental lines of Retzius
as it goes deeper, the caries forms a triangular pattern or cone shaped lesion
with the apex towards DEJ and base towards the tooth surface. Finally there
is loss of enamel structure, which gets roughened due to demineralization,
and disintegration of enamel prisms.