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84 GENERAL REMARKS ON FILLING.
structible in the mouth ; more easily affected by cer-
tain agents, such as nitric acid, nascent chlorine, etc.
less pliable and less adaptable ; more difficult to work
into foil ; not so readily formed into fillings ; and pos-
sessed of much less cohesiveness, being almost un-
weldable by the ordinary method of manipulation.
Silver is a better conductor than tin, and would there-
fore in some cases be more objectionable. The saliva
is often in such a condition as to act upon it with
great energy and rapidity. Its color, too, is objec-
tionable. With these disadvantages, its use has very
properly been wholly abandoned.
Platinum.—This metal has been but little used for
the purpose of filling ; though it possesses some of
the requisite qualities in a. very high degree ; as, for
instance, indestructibility, in which property it is su-
perior to gold. In other respects, however, it is very
it has not as yet been wrought into any
deficient ;
form in which it can be welded with facility ; it is
difficult to work into foil ; and when it is put into this
form, it possesses a stiffness and harshness that ren-
der its adaptation and condensation almost impracti-
cable. It is more on this account, perhaps, than on any
other, that it has been so little employed for the pur-
pose of filling. It has also less adhesiveness than
gold, and much sooner parts with this property. Slight
crumpling or bending serves to stiffen it so as to de-
84 GENERAL REMARKS ON FILLING.
structible in the mouth ; more easily affected by cer-
tain agents, such as nitric acid, nascent chlorine, etc.
less pliable and less adaptable ; more difficult to work
into foil ; not so readily formed into fillings ; and pos-
sessed of much less cohesiveness, being almost un-
weldable by the ordinary method of manipulation.
Silver is a better conductor than tin, and would there-
fore in some cases be more objectionable. The saliva
is often in such a condition as to act upon it with
great energy and rapidity. Its color, too, is objec-
tionable. With these disadvantages, its use has very
properly been wholly abandoned.
Platinum.—This metal has been but little used for
the purpose of filling ; though it possesses some of
the requisite qualities in a. very high degree ; as, for
instance, indestructibility, in which property it is su-
perior to gold. In other respects, however, it is very
it has not as yet been wrought into any
deficient ;
form in which it can be welded with facility ; it is
difficult to work into foil ; and when it is put into this
form, it possesses a stiffness and harshness that ren-
der its adaptation and condensation almost impracti-
cable. It is more on this account, perhaps, than on any
other, that it has been so little employed for the pur-
pose of filling. It has also less adhesiveness than
gold, and much sooner parts with this property. Slight
crumpling or bending serves to stiffen it so as to de-
