Page 226 - My FlipBook

194 THE GOLD AND PORCELAIN ENLAY

differs very little from that for other materials except in the
method of retention and in the character of the marginal

bevel.

t^0^ ^

-_^'

Fig. 229.—Proximo-occlusal cav- Fig. 230.—Step form in a bi-
ity on a molar. cuspid.

Fig. 231.—Another view Fig. 232.—A step form involv-
of the cavity shown in Fig. ing the mesial, lingual and incisal
229. surfaces of an abraded central in-
cisor. The inlay is locked in place
by^ the incisal step.

Adequate Resistance Form should always be obtained.
Walls should not be made absolutely parallel, but should

diverge slightly, to allow for proper "draw'' (see Figs. 219,
220, 221, 222, 223, 224, 225 and 226). Retention should be

i