Page 171 - My FlipBook
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Fig. 96. A photomicrograph showing a portion of a section of enamel in which caries has pro-
gressed part way through its thickness. e. Enamel that is perfect. x. Decayed enamel. The
decayed portion of the enamel has been filled with yellow shellac, which has taken the place of the
cementing substance dissolved out from between the rods, and takes dark. The sound enamel, being
solid, does not absorb the shellac. The plan of doing this is given in the text. In this particular
section not much of the structure of the enamel can be seen in the undecayed portion.
