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MENTHOL. 459

Dental Uses.—In dental practice, menthol has given satisfac-
tion as an external remedy in facial neuralgia, odontalgia, as an
obtunder of sensitive dentine, and as a local anaesthetic. For re-
lieving the pain of sensitive dentine, a small portion of the crys-
tals is applied to the sensitive surface, and in a feu' minutes the
local anaesthetic effect is produced. As an antiseptic it has been
employed in the treatment of decomposing pulps of teeth,
necrosed teeth, etc. When applied to mucous surfaces for its
anaesthetic effect, a twenty to thirty per cent, solution is used,
but it is more evanescent than cocaine. Menthol also forms an
ingredient of a devitalizing mixture.
The oil of the ordinary peppermint is considered to be a germi-
cide and antiseptic of considerable power and rapidity. It is
readily diffusible, does not evaporate quickly, and is non-poison-
ous. It is useful in root-canals and fistulous tracts after removal
of pulps, and for hypersensitive dentine.

DENTAL FORMULi^.
For Facial Neuralgia and Odontalgia. For Odontalgia.
R . Mentholi gr.j R . Mentholi gr-xv
Spts. vini rectificati . X(\] Cocaine hydrochlor. gr.xv
Olei caryophylh . lTl,x. M.
. Pul. opii
.
^j
SiGNA.—For facial neuralgia, painted
Mucilag. acacise,
on the affected part. For odontal-
Pulv. altheas . ., . aa q. s. M.
gia, applied on cotton to carious SiGNA.—Introduce on a pledget of
cavity.
cotton.
For Neuralgia and Odontalgia.
For Odontalgia.
R . Mentholi gr.v
Olei caryophylli (or oil R Mentholi .... 5 parts
Chloroformi ... M.
of cajeput) .... fjj. M. 8 parts.
SiGNA.—To be painted on affected SiGNA.—Apply on cotton.
part, or, for odontalgia, applied on
cotton. Local Anastketic.
Local AncEsthetic. Dr. a. W. Harlan.
R . 2 parts
For Abscesses, Boils, Felons, etc. Mentholi ...
R . Chloroformi 3 v Ether .... 15 parts
Ether sulphurici . . . ^j Chloroformi . lOO parts. M.
Mentholi ^ss. M. Signa.—For injection, or applied on
SiGNA.—Use with spray apparatus. cotton about tooth.