Page 68 - My FlipBook

52 THE TIGHTENING OF LOOSE TEETH

"When polished with fine sandpaper discs, the gold
fillings acquire a dull appearance.
If teeth are to be fired or to have gum added, this
may be done after they have been coloured, the colours
having a higher melting-point than prosthetic or
enamel.
A great many porcelain fillings in natural front
teeth can be imitated by grinding a small groove in
them and melting in Jenkins' porcelain.
Artificial porcelain fillings like these should be dark-
coloured, to stand out from the surface of the artifi-
cial tooth.
I never use the pure low-fusing enamel ; it is
generally better practice to mix two-thirds of pros-
thetic with one-third of Jenkins' enamel. Fillings
are thus given a valuable hardness.
Breakage of the vitreous and fissured margins has
not been observed.
It is only in the last baking that the filling gets the
corresponding colour of Jenkins' low-fusing enamel.
The colour of the prosthetic is to be in accordance
with the total colour. In a yellowish filling I mix
2 parts of yellow prosthetic, in a white filling, 2 parts
of white prosthetic with 1 part of the corresponding
filling colour.