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into contact with the flesh it makes a painfnl wound. Utmost care
should, therefore, be exercised in handling the acid; but if it should get
on the hands it should be neutralized at once witli a solution of sodium
bicarbonate.
The acid having been thoroughly neutralized the inlay should be
removed from the wax and placed in boiling water for about five minutes.
After this it should be thoroughly washed with chloroform to remove any
wax that niav still adhere to it. It is then to be dried with warm air.

Fig. 131. Fig. 132.

If, by judicious use of absorbents, the cavity
can not be kept dry, the rubber dam should now be
Setting the
Tnlay. adjusted. It has been found that most cavities in
upper teeth can be kept dry by placing a small
napkin between the teeth and a roll of absorbent cotton between the lips
or cheeks and the gums. After the cavity has been thoroughly dried it
is then grooved with a small inverted cone bur. It should now be wiped
with a pellet of cotton saturated with chloroform, and after this has been
done it should be thoroughly dried with warm air.
The ideal cement for setting inlays would be translucent and very
adhesive. But since it is necessary to use an opaque cement, the ideal
kind not yet having been produced, the whitest that can be obtained
is probably the best for setting all large inlays. When inlays are con-
structed of a monochromatic porcelain and are slightly lighter than the
tooth, a cement that is the same color as the porcelain, but of a lighter
hue, is the best for setting them, because the rays that are transmitted
through the porcelain are not so freely absorbed by the cement, but are

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