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DENTAL MEDICINE, ;
376
DENTAL FORMULA.
For Alveolar Pyorrhcea,
Dr. a. W. Harlan.
R. Creolin jj
Sodium fluo. silicate gr.xx
Olei cassiae TTLxx
Glycerins; 5 iv. M.
Dilute with water to suit.
SiGNA.—Use as a mouth wash on a soft brush, during the intervals between
sittings when escharotic and antiseptic agents have been applied.
CRETA PR^PARATA—PREPARED CHALK.

PRECIPITATED CHALK, CARBONATE OF LIME.
Formula.—CaCOg.
Derivation.—Prepared chalk is obtained by freeing chalk from
such impurities as gritty and flinty substances and soluble saline
matter, by elutriation, and afterward drying it. It is the only
form in which chalk is used medicinally.
Medical Properties and Action.—Prepared chalk is antacid, ab-
sorbent and astringent. It diminishes the secretion of the
mucous membrane, and at the same time acts as an antacid in
correcting any acidity present. When internally administered
for a considerable time, like magnesia, it accumulates in the
bowels and forms intestinal concretions; hence an occasional
aperient is necessary.
Therapeutic Uses.—Prepared chalk is an excellent antacid in
diarrhoea from acidity, in acidity attending dyspepsia and gout,
chronic bronchitis in advanced stages, rachitis, etc. Externally,
it is employed in the treatment of ulcers, burns, excoriations and
skin diseases. It moderately stimulates ulcers and absorbs the
discharge, thus preventing them from spreading.
It is an antidote for poisoning by oxalic and most of the vege-
table and mineral acids.
Dose.—Of prepared chalk, gr. v to 3j, in powder or sus-
pended in water by the aid of mucilage and sugar.
Chalk Mixture— Mistura Creta—(prepared chalk, 5ss
acacia, gr. cxx; water, f.^iv) is often combined with opiates and