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198 THE GOLD AND PORCELAIN INLAY

that used in the model. Before setting the inlay, this is
removed, affording space for increased body of cement.
Some operators also advocate removal of wax from the under

surface of the model before casting, thus affording an increased

Fig. 245.—Same cavity shown in Fig. 246.—A badly involved mo-
Fig. 244. lar. The entire occlusal surface will
be restored in gold. The points of
the cusps have been removed]for rea-
sons of strength.

Fig. 247.—Same preparation illus- Fig. 248.—Preparation for
trated in Fig. 246. a Carmichael attachment.

grip of the cement on the inlay after it is cast and set. Some
also advise the undercutting of the walls of the cavity after
casting the inlay and before setting, for the same purpose.
The author does not advocate either of these latter procedures,

as routine practice, since he believes that more ideal results