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ARTIFICIAL DENTURES. 93

adopting either of these methods the plates, after they are
united to each other with solder, should be again swaged to
correct any change of form which may take place during the
soldering process.
Partial Lower Base.—To avoid encroaching upon the re-
flected portion of the mucous membrane, the glands beneath
the tongue, or the frenum lingure, it is necessary to make the
lingual surface of the anterior portion of the palate quite
narrow, which, of course, in partial cases, weakens the plate
at this point. It is, therefore, desirable—even though the

ordinary thickness of metal has been used—to reinforce or
double this connecting band, the duplicate piece extending
back over the lateral wings of the plate, and crossing them
obliquely as indicated in Fig. 58.
After this has been accomplished and the plate carefully
fitted to the mouth, the " bite,"' antagonizing model, etc.,
are secured in the manner previously described.
Grinding and Adjusting the Teeth.—In arranging or
adjusting single gum teeth to the plate, the portions applied
to the base should be ground away just sufficiently to restore
the required fulness of the parts and to give proper length
and inclination to the teeth. The coaptation of the ground