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THE PORCELAIN INLAY. 2>11
are unable to withstand the solvent action of saliva and the force of
mastication.
The preparation of the cavity for either high-fusing or low-fusing
porcelains is identical. The cavities should be free from undercuts. If
Fig. 353. Fig. 354. Fig. 355. Fig. 356. Fig. 357. Fig. 358.
these are unavoidable through extensive decay, the cavity should first
be filled with oxyphosphate of zinc. The edges should be sharp and
