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680 MANAGEMENT OF THE DECIDUOUS TEETH.

Salol, whicli was advocated as a root filliiijir for permanent teeth by
Dr. A. E. Mascort^ of Paris, France, is well adapted also for fillino; the
canals of deciduous teeth, " It is a white crystalline powder, insoluble
in water and glycerol, but soluble in alcohol, ether, chloroform, etc.
fuses at 40° C. but crystallizes quickly again." Melted together, salol
and aristol, salol and iodoform, or salol and paraffin, become liquid
like salol alone. After a pulp canal is thoroughly dried the salol may
be fused on a small spatula and carried to the canal, into which it wiir
be taken by capillary attraction or a broach may be heated and inserted
in the salol. A small (juantity will adhere like a drop of liquid and
may thus be carried to the canal. The heated broach may be again
introduced in the canal to insure thorough apj)lication. Dr. Mascort
uses the hypodermic syringe Avith a small needle for introducing into
the canals. It will crystallize in a very short time, making a solid fill-
ing. Though the writer has not had much experience with salol as a
root filling, he is so far well pleased with the result. (See Chapter
XVII., p. 439.)

Alveolar Abscess.
The treatment should be the same as with the permanent teeth, that
is, removal of the cause—which is, almost invariably, a decomposed
pulp. Even with a decomposed pulp an abscess seldom occurs if there
be any opening from the cavity of decay to the l)ulp chamber, unless
such opening has become stopped by some foreign substance.
Make a free opening into the pulp chamber and Avith a syringe
Avash out as much of the contents as possible. Dry the chamber and
Avith a " minim " syringe (see Chapter XVII. , Fig. 441), or drop tube,
apply hydrogen dioxid. While capillary attraction will carry this
into a dry canal, the application of a nerve broach, preferably platino-
iridium, will serve to mix it thoroughly Avith the contents of other
canals, and increase its efficiency.
If a fistulous opening has formed through the outer alveolar plate
but not through the gum, an opening should be made through the latter
with a sharp lancet about five minutes after the application of 4 per
cent, cocain hydrochlorid solution on a Avad of cotton.
If hydrogen dioxid can be forced from the pulp chamber through
the root canals and fistulous opening, the accumulated pus Avill be
thoroughly evacuated and the cure hastened. As a rule, hoAvever, the
abscess disappears after the cause is remoA^ed, that is, the jjutrescent or
decomposed contents of the pulp chamber and canals.
After drying the pulp chamber and canals, apply iodoform paste
1 Dental Cosmos, 1894, p. 352.
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