Page 127 - My FlipBook

METALLIC BASK WITH Rl'BHER ATTACHMENT. II5
enamel, and retire. The plate when done will present a
i^iassy or watery appearance. The gas must then be turned
off, and the case allowed to cool in the cooling muine. Fig.
C)fi illustrates the finished denture.

METALLIC BASE WITH RUBBER OR
CELLULOID ATTACHMENT.
The method of attaching porcelain teeth to a metallic
plate by means of rubber or celluloid has, in full dentures,
many advantages over the soldering process. In point of
cleanliness and purity it is much superior; the diminished
lial)ility to fracture of the teeth on account of the pliable
nature of the attaching material used, the facility with
which injury may be repaired, the practicability of remodel-
ing the piece without impairment of the teeth or plate, are
among, the qualities w hich commend this form of denture.
In mounting teeth by this method, any of the metals em-
ployed for artificial dentures, wdiether gold, silver, platinum,
aluminum, cast metal, or that formed by the electro-deposit
process may be used. When a silver base is used it should
be made from refined silver alloyed with platinum, with the
additional precaution of interposing a layer of tin-foil in
packing the case betw^een the rubber and plate; this, how-
ever, is not necessary when celluloid is used.
Method of Procedure.—After securing the metallic base
and fitting it to the mouth, the " bite " should be secured in
the usual way and the plaster cast with the metal plate in
position should be secured in an articulator. We now^ pro-
ceed as for ordinary gold w'ork, the teeth are ground and
jointed (if block or gum teeth are used), and held tem-
porarily in position with a little wax upon the labial surface.
Next mark with a sharp-pointed instrument on the palatine
surface of the plate each point \vhere it is desirable to solder