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VITAL PULPS 213

(i) TREATMENT OF VITAL PULPS
—
(A) Pulps Capable of being Restored to the Normal.
The treatment is known as Conservative treatment, and de-
pends on whether the decay, when present, has extended to
the pulp chamber, constituting the condition known as
Exposure of the Pulp, or whether it has not produced this

condition. If the pulp be not exposed, the treatment applied
is known as Pulp Protection ; if the pulp be exposed, the opera-
tion of Pulp Capping may be resorted to.
1. Pulp Protection.— (a) Under ''aseptic precautions,"

establish the outline form of the cavity, remove the decay,
make slight retentive form, and seal into the cavity with base
plate gutta percha or cement, a small pledget of cotton
moistened with an antiseptic and anod5me (pain reliever),
such as eugenol or oil of cloves, (b) At the end of 24 or 48

hours, if pain is relieved, remove the dressing under ''aseptic
precautions," varnish the cavity walls, place a cement
intermediate in position and fill.
2. Pulp Capping.—The indications for the operation are

accidental exposures, teeth with incompletely formed roots,
and very badly broken down teeth, otherwise impossible to
save. In all of these, the condition of the pulp must not have
passed beyond the stage of artereal hyperaemia, since it is
usually impossible to restore pulps to a normal condition
which have progressed beyond this stage.

A thin paste composed of one of the following substances
or mixtures may be used for capping pulps.
1. Thymolized calcium phosphate and clove oil, eugenol
or phenol compound (Buckley).

2. Zinc oxide and clove oil.
3. Chlora-percha.
4. Parafhne (melted), or parafhne and salol.