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206 DENTAL MEDICINE.
Reduce the cotton by cutting and cross- gutta percha, or paste of oxyphos-
cutting to a soft fine fuzz, then in- phate of zinc. This application
corporate it with the above mixture should remain 48 hours in the case
dry and separate into small pieces of an adult ; 24 hours in case of a
for convenient application. patient under 21 and more than 12
Or arsenic, morphine and cinnamon years of age; and 8 to 12 hours in
applied to cotton in same manner as case of a patient under 12 years of
above. age.
Devitalizing Pulps of Teeth.
For Destroying and Removing Pulps.
Dr. a. W. Harlan.
Dr. a. W. Harlan.
First apply to point of exposure
R. Acidi arseniosi . . . gr.xc
vinum opii or any anodyne (not car-
Cocaini hydrochlor. . gr.x
bolic acid) for a minute or two, then
lodoformi gr.v to vij
use the following
Either oil of cloves, or
R. Acidi arseniosi . . . 3J oil of cassia . . . q.s.
Hydrochlorate of co- To form a stiff paste.
caine gij Apply ^ij grain to the pulp and allow it
Lanolin ad.q.s. to remain 48 hours. Seal cavity with
To make a stiff paste, gutta percha, when the dressing is
SiGNA.—Apply a small quantity to the removed keep cavity dry, and wash
exposure on a little square of gummed it with dialyzed iron, and apply alco-
paper about ^-^ of an inch in size; holic solution of tannin. Seal cavity
this should be covered with a pellet for 8 days, when the pulp may be
of cotton saturated with liquid vase- removed painlessly. The root may
line and the cavity filled with soft be filled at once.
Tests for Jrsenic.—Arsenic, in the solid state, may be detected
by its volatility ; heated over a spirit-lamp, it passes off in the
form of a white vapor, devoid of smell, and is deposited on a
cool surface as an amorphous powder, or in octahedral crystals.
When arsenic is thrown on burning charcoal, it is deoxidized,
and gives out the garlic ordor of metallic arsenic. When heated
in a glass tube with charcoal or black flux, it sublimes, and con-
denses in the form of a brilliant steel-gray ring or mirror.
The following reagents will detect it when it is in aqueous
solution : Sulphuretted hydrogen, or sulphide of ammonium, pro-
duces a lemon or yellow sulphide of arsenic ; the addition first of
ammonia, and then of nitrate of silver, produces a light-yellow
arsenite of silver ; the addition of potassa, and then of sulphate of
copper, produces a light-green arsenite of copper. The most
206 DENTAL MEDICINE.
Reduce the cotton by cutting and cross- gutta percha, or paste of oxyphos-
cutting to a soft fine fuzz, then in- phate of zinc. This application
corporate it with the above mixture should remain 48 hours in the case
dry and separate into small pieces of an adult ; 24 hours in case of a
for convenient application. patient under 21 and more than 12
Or arsenic, morphine and cinnamon years of age; and 8 to 12 hours in
applied to cotton in same manner as case of a patient under 12 years of
above. age.
Devitalizing Pulps of Teeth.
For Destroying and Removing Pulps.
Dr. a. W. Harlan.
Dr. a. W. Harlan.
First apply to point of exposure
R. Acidi arseniosi . . . gr.xc
vinum opii or any anodyne (not car-
Cocaini hydrochlor. . gr.x
bolic acid) for a minute or two, then
lodoformi gr.v to vij
use the following
Either oil of cloves, or
R. Acidi arseniosi . . . 3J oil of cassia . . . q.s.
Hydrochlorate of co- To form a stiff paste.
caine gij Apply ^ij grain to the pulp and allow it
Lanolin ad.q.s. to remain 48 hours. Seal cavity with
To make a stiff paste, gutta percha, when the dressing is
SiGNA.—Apply a small quantity to the removed keep cavity dry, and wash
exposure on a little square of gummed it with dialyzed iron, and apply alco-
paper about ^-^ of an inch in size; holic solution of tannin. Seal cavity
this should be covered with a pellet for 8 days, when the pulp may be
of cotton saturated with liquid vase- removed painlessly. The root may
line and the cavity filled with soft be filled at once.
Tests for Jrsenic.—Arsenic, in the solid state, may be detected
by its volatility ; heated over a spirit-lamp, it passes off in the
form of a white vapor, devoid of smell, and is deposited on a
cool surface as an amorphous powder, or in octahedral crystals.
When arsenic is thrown on burning charcoal, it is deoxidized,
and gives out the garlic ordor of metallic arsenic. When heated
in a glass tube with charcoal or black flux, it sublimes, and con-
denses in the form of a brilliant steel-gray ring or mirror.
The following reagents will detect it when it is in aqueous
solution : Sulphuretted hydrogen, or sulphide of ammonium, pro-
duces a lemon or yellow sulphide of arsenic ; the addition first of
ammonia, and then of nitrate of silver, produces a light-yellow
arsenite of silver ; the addition of potassa, and then of sulphate of
copper, produces a light-green arsenite of copper. The most
