Page 169 - My FlipBook

CYLINDER OR BLOCK FILLING. . 165

of fracturing the tooth, breaking down the wall of
the cavity, where the filling is terminated. Another
method is to fill up the cavity principally with blocks,
and to put in the last part of the filling in the strip,
fitted in from the bottom to the orifice. The objec-
tion to this method is, that unless adhesive foil is
employed, the portion inserted in the strip is liable
to be displaced, and in this way the whole, filling

become destroyed.
Another method of arranging this kind of filling,
particularly when the bottom of the cavity is irreg-
ular, is to make a large, flat pellet, condense it firmly
to the bottom, and set the blocks upon this for a
foundation. By this method there is a more perfect
adaptation of the gold to the bottom of the cavity,
than by placing the ends of the blocks down upon an

uneven surface. After the gold is all introduced, a
small-pointed plugger must be passed all over the
surface, to consolidate the protruding portions and
form a surface to the filling. These protruding por-
tions should be sufficient to make the surface perfectly
for a depression
flush with the border of the cavity ;
here is fatal to a complete finish. After the surface
is condensed with the fine and large points, it may
be rubbed down with an instrument serrated upon
the side, and afterward with the coarse file, and then

with the fine, etc.