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246 INFECTIONS OF THE PERI-APICAL TISSUES

blood pressure, low hemoglobin index and deficiency of red
and white blood cells with a lymphocytosis. The minority
vary from normal to very high blood pressure with an exhibi-

FiG. 288.—^Large granuloma. Fig. 289.—Marked case of
Protruding canal filling. absorption surrounding the
root of an upper cuspid.

tion of leucocytosis. With a little training, the dentist should
be able to estimate, approximately at least, the state of ar-

terial tension of the patient and be guided accordingly. (See
Figs. 278 to 290.)

Fig. 290.—Pronounced case of p^s formation affecting many teeth. One tooth
presents badly absorbed roots.

CHRONIC ALVEOLAR ABSCESS

Causes.—The causes of this condition are the same as

those producing the acute variet}^ The condition is one in