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6o MECHANICAL DENTISTRY AND METALLURGY.
continuously around the outer portion of the cast, just
inside of the plate line. In many cases this results in an
Fig. 33.
increased adhesion ; especially is this so in mouths having
fiat or soft surfaces. This method is shown in Figs. 33
and 34.
Fig. 34.
Repairing.—One of the most frequent repairs we are
called upon to make is a fracture through the center of an
upper partial denture, the break extending from the region
