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DIAGNOSIS OF MOUTH AFFECTIONS. 155

then
ate of potash ; dress daily with a solution composed of
carbolic acid one part, and oil of sweet almonds fifteen parts,
applied on cotton secured in the cavity. If no improvement,
then syringe the antrum with a solution consisting of carbolic
acid oji tinct. iodine, .5), iodide of potassium gr. xv, water i^viij.
Where a more powerful stimulant is required, use an injection of
zinc, gr. x to the ounce of water. For systemic treatment, ad-
minister sulphide of calcium in the form of one-tenth of a grain
pill three times a day after meals, doubling the dose if necessary.
[Dr. Frank Jbbott.) When an opening has been made into the
antrum, sufficiently large to admit the little finger, the following
treatment has proved effectual; syringe first with a warm solution
of chloride of sodium, after which inject diluted peroxide of
hydrogen, increasing the strength of the solution gradually if
necessary, until the pus has ceased discharging; after this a solu-
tion of boric acid or listerine may be used. The injection of
peroxide of hydrogen into the antrum through a small opening is
not justifiable owing to its effervescent action on the pus. Dr. F.
D. Weisse recommends injecting the antrum at least five times a
day with a solution of hyposulphite of soda, one drachm to one
ounce of water. Dr. S. Marshall recommends as a wash for
J.
the antrum, boracic acid twelve parts, salicylic acid four parts,
water one-thousand parts ; iodoform, iodol, aristol, pyoktanin,
sulphonal and boric acid, in form of powder, are also recom-
mended. M. Emile Denis recommends syringing out the cavity
twice a day with a sixteen per cent, solution of boricine (see
boricine), and then applying about ateaspoonful of the powdered
boricine.
Alveolar Ulceration is distinguished from alveolar abscess by the
presence of an ulcerated surface of peridental membrane instead
of pus contained in a fibrous sac, the purulent matter in alveolar
ulceration oozing out through the gum or around the neck of the
affected tooth : no new tissue is formed, as in the case of abscess ;
but the normal tissue is disorganized and wasted, and the matter
discharged is watery, translucent, and may be in some cases odor-
less, while that from an abscess is thick, opaque and offensive.
Ulceration causes little or no swelling, and the inflammation is