Page 932 - My FlipBook

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942 DISEASES OF THE PERIDENTAL MEMBRANE.

the chill seems to be a favorite point for them to open. Another form
that opens at the same place I have illustrated in Fig. 501 ; in this the
Fig. 500. Fig. 501.

Chronic Alveolar Abscess at the Root of Chronic Alveobir Abscess of the
a Lower Incisor with Fistula discharg- Root of the Lower Incisor with
ing on the Face under the Chin : a, ab- Absce-ss-cavity jjassing throufih
scess-cavity in the bone; 6, b, h, fistula the Body of the Bone and dis-
following the periosteum down to the charging on the Skin beneath
lower margin of the body of the bone the C'hin : n, very large abscess-
and discharging on the skin. cavity f), mouth of the fistula.
;
pus has burrowed directly through the body of the bone. Such cases
as this must, I think, usually occur from abscesses that were chronic
from the first hli)id abscesses,
Fig. 502. the pus from whicli has never
penetrated the outer lamina of
bone over the affected root. In
such a case the pus may very
readily make its way through
the body of the bone, in obe-
dience to gravitation.
This class of cases is not ne-
cessarily confined to the anterior
part of the lower jaw, but may
occur at any point from angle
to auffle. Fio;. 502 illustrates
rather an unusual case that
Fistula pa.ssing down through the Body of the Lower to me some
Maxilla. (See page 943.) was presented
years ago. There was a fis-
tulous opening just beneath the body of the lower maxilla, about the point
where the facial artery crosses over the bone in ascending to the face ; this,