Page 546 - My FlipBook

544 — DENTAL MEDICINE.

For Erythema.
Dr. a. Eichler.
R . Saloli 3 ij
Zinci oxidi
^
Pulv. amyli aa ^iv
Lanoline gj- M.
SANDARACA—SANDARACH.
Source.—Sandarach is a resinous substance obtained from an
evergreen tree Thuya Articulata—which grows in the northern
part of Africa. The gum is in the form of small, irregular,
round and oblong tears, of a pale yellow color, sometimes brown,
and more or less transparent, dry and brittle. It has a faint,
agreeable odor, which is increased by warmth, and a resinous,
somewhat acrid taste. It melts with heat, diffusing a strong
balsam odor, and is inflammable. It is soluble in alcohol and
ether, and slowly dissolves in warm oil of turpentine. It con-
sists of three resins, varying in their relations to alcohol, ether
and oil of turpentine. The sandaracin which remains after
sandarach has been exposed to the action of ordinary alcohol
is a mixture of two of these resins.
Uses.—Sandarach was formerly employed as a medicinal agent,
and entered into the composition of various ointments and
plasters, but its use is now restricted to such purposes as the
composition of a varnish, ingredient of incense, etc. After the
erasion of ink marks, its powder, if rubbed on such a surface,
will prevent fresh ink marks from spreading.
Dental Uses.— In dental practice, sandarach, dissolved in
alcohol, forms a varnish for coating the surface of plaster models,
etc. ; it is also used for checking secretions from the gums during
the operation of filling teeth, either applied as a coating to the
surface, or on bibulous paper saturated with it. It is also em-
ployed to saturate cotton to be used as a temporary filling in
cavities of the teeth, for the protection of medicinal applications.
DENTAL FORMULA.
Tra7isparent Sandarach Varnish.
R . Gum sandarach ^ y
Alcohol qt.j.
Mix and digest over a moderate heat until the sandarach is dissolved.