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1G4 DENTAL MEDICINE. ;

Treatment.—Extraction, by first making an incision through
the mucous membrane, and then exposing the tooth by the
removal of its bony capsule.
Necrosis of the 'Jaw is indicated by inflammation like that of
periodontitis in the early stage, but differing as the disease pro-
gresses; gum over affected part thickened, tumid and of a red
color; pus oozing from the edge of gum, which soon separates
from the alveolus, the margins of which become exposed ; loosen-
ing and loss of the teeth ; the detachment of the dead alveoli
from the living bone, and remaining loose in the substance of the
thickened gum which becomes dark in color, surrounded by pus
the escape of the pus into the mouth, or pointing below the chin,
or beneath the fascia of the neck, as low, at times, as the clavicle.
Treatment.—Remove the dead portions from the living bone.
Syringe with peroxide of hydrogen, or caustic pyrozone, to cleanse
the part, and use chlorinated washes, such as chloride of soda or
permanganate of potash, to correct the offensive odor and disa-
greeable taste. Make daily applications of dilute aromatic sul-
phuric acid, adding to the acid a few drops of the tincture of
capsicum for its stimulating effect; diluted carbolic acid, tincture
of iodine and chloride of zinc, sulphate of copper, listerine and
ethereal solution of iodoform, aristol, etc., are also used as appli-
cations. Support the strength by stimulants, tonics and nour-
ishing diet. For a dead bone solvent, wash out the sinus with
peroxide of hydrogen, and inject into it the following, twice a
day, so that it will come in contact with the dead bone : Pure
scale pepsin, 5ss ; nitro-muriatic acid, 5j ; distilled water, Oj.
(See Necrosis and Caries of Bone.)
Dislocation of the Lower faw, when double, is indicated by
inability to close the mouth ; the mouth widely open ; the chin
prominent, with a distinct hollow in front of each ear. A single
dislocation is indicated by the mouth being only partially open,
the chin displaced to one side, the distinct hollow below the ear
being on the opposite side.
Treatment.—Reduction is made by placing the thumbs, pro-
tected by napkins, as far back upon the molars as possible, and
then depressing the back part of the jaw, and at the same time