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150 FILLING TEETH.
DRYING CAVITIES.
After a cavity is properly formed, it should be
thoroughly cleaned and dried. Every particle of de-
tached bone or foreign substance should be removed
during the excavation every thing should be kept
out, every fragrant removed as soon as it is de-
tached ; but generally there is something of the kind
to remove after the cavity is formed. This may be
done probably better with a syringe than by any
this, however, used in connection with
other method ;
a moist lock of cotton on a probe, will serve to re-
move every extraneous material that may be in the
cavity. Any foreign substance remaining in the
cavity prevents a perfect adaptation of the gold to
the part, and consequently as perfect an attachment
as would otherwise be obtained. After washing out
thoroughly, wipe out with successive locks of dry cot-
ton, till all the moisture is removed. The ordinary
cotton will not accomplish this very effectually. By
washing cotton in sulphuric ether, it is much im-
proved for this purpose. The ether removes a peculiar
oily substance from it, and thus increases its capacity
to absorb moisture. Ether or chloroform will either
answer the purpose ; or boiling the cotton in water
in which there is a small portion of carb. soda, or
150 FILLING TEETH.
DRYING CAVITIES.
After a cavity is properly formed, it should be
thoroughly cleaned and dried. Every particle of de-
tached bone or foreign substance should be removed
during the excavation every thing should be kept
out, every fragrant removed as soon as it is de-
tached ; but generally there is something of the kind
to remove after the cavity is formed. This may be
done probably better with a syringe than by any
this, however, used in connection with
other method ;
a moist lock of cotton on a probe, will serve to re-
move every extraneous material that may be in the
cavity. Any foreign substance remaining in the
cavity prevents a perfect adaptation of the gold to
the part, and consequently as perfect an attachment
as would otherwise be obtained. After washing out
thoroughly, wipe out with successive locks of dry cot-
ton, till all the moisture is removed. The ordinary
cotton will not accomplish this very effectually. By
washing cotton in sulphuric ether, it is much im-
proved for this purpose. The ether removes a peculiar
oily substance from it, and thus increases its capacity
to absorb moisture. Ether or chloroform will either
answer the purpose ; or boiling the cotton in water
in which there is a small portion of carb. soda, or
