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DIAGNOSIS OF MOUTH AFFECTIONS. 163
ing prominence of the cheek, which more or less involves the
mouth, obstructing the nostril, causing double vision by dis-
placing the eyeball.
Treatment.—Removal by a surgical operation.
j4 Malignant Form of Tumor of the faws is indicated by a solid
prominence, rapid in growth, and having a tendency to invade
surrounding structures, and to fungate like a mushroom.
Treatment.—Removal by a surgical operation, and the applica-
tion of escharotics, as chromic acid, or chloride of zinc, etc., to
prevent its reproduction.
A Dentigerous Cyst.—Cysts of the teeth are of two kinds
those connected with the roots of developed or eruptive teeth,
and those connected with imperfectly developed or unerupted
teeth, and both varieties are common to either jaw; the latter,
however, are known as " dentigerous cysts." A dentigerous
cyst is indicated by the expansion of the bone of the jaw at some
particular spot, with disfigurement of the adjacent parts ; a sense
of weight and tension in the affected part ; in some cases, con-
stitutional irritation from pressure ; pressure producing a parch-
ment-like crackle or crepitation ; absence of a tooth, which has
never been erupted nor extracted. Heath remarks that " the
clinical history of cysts connected with the teeth is that of
painless expansion of the alveolus of either jaw, but more fre-
quently of the upper, with crackling of the bone on pressure,
and ultimate absorption of the bony wall. The cyst then pre-
sents a bluish appearance through the distended mucous mem-
brane, and if large, gives distinct evidence of fluctuation."
Treatment.—A free incision, and the removal of the unerupted
tooth by destroying the front wall of the cyst, and the cavity
filled with antiseptic gauze or lint, so as to induce granulation
and gradual obliteration. In the case of a cyst of the lower jaw,
after the removal of the contents and a portion of the wall, the
plates of bone should be pressed together as much as is possible.
Jn Unerupted Impacted Tooth is indicated by a hard, bony tumor
on the alveolar ridge, sometimes extending along the surface of
the palate bone, or the body of the maxilla, and in form corre-
sponding to a tooth, the absence of which is noted.
DIAGNOSIS OF MOUTH AFFECTIONS. 163
ing prominence of the cheek, which more or less involves the
mouth, obstructing the nostril, causing double vision by dis-
placing the eyeball.
Treatment.—Removal by a surgical operation.
j4 Malignant Form of Tumor of the faws is indicated by a solid
prominence, rapid in growth, and having a tendency to invade
surrounding structures, and to fungate like a mushroom.
Treatment.—Removal by a surgical operation, and the applica-
tion of escharotics, as chromic acid, or chloride of zinc, etc., to
prevent its reproduction.
A Dentigerous Cyst.—Cysts of the teeth are of two kinds
those connected with the roots of developed or eruptive teeth,
and those connected with imperfectly developed or unerupted
teeth, and both varieties are common to either jaw; the latter,
however, are known as " dentigerous cysts." A dentigerous
cyst is indicated by the expansion of the bone of the jaw at some
particular spot, with disfigurement of the adjacent parts ; a sense
of weight and tension in the affected part ; in some cases, con-
stitutional irritation from pressure ; pressure producing a parch-
ment-like crackle or crepitation ; absence of a tooth, which has
never been erupted nor extracted. Heath remarks that " the
clinical history of cysts connected with the teeth is that of
painless expansion of the alveolus of either jaw, but more fre-
quently of the upper, with crackling of the bone on pressure,
and ultimate absorption of the bony wall. The cyst then pre-
sents a bluish appearance through the distended mucous mem-
brane, and if large, gives distinct evidence of fluctuation."
Treatment.—A free incision, and the removal of the unerupted
tooth by destroying the front wall of the cyst, and the cavity
filled with antiseptic gauze or lint, so as to induce granulation
and gradual obliteration. In the case of a cyst of the lower jaw,
after the removal of the contents and a portion of the wall, the
plates of bone should be pressed together as much as is possible.
Jn Unerupted Impacted Tooth is indicated by a hard, bony tumor
on the alveolar ridge, sometimes extending along the surface of
the palate bone, or the body of the maxilla, and in form corre-
sponding to a tooth, the absence of which is noted.
