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466 THE TREATMENT AND FILLING OF ROOT CANALS.
is ordinarily done where a roughened eotton-earryino- ])rol)e Is used.
With a smootli broach and the cotton fiber iehcd on as (k'scribed the
broach may be pnshed forward with considerable force into a canal
Avithout piuicturing the cotton, which is securely carried as
Fig. 455.
far as the broach will go. On account of the smoothness
of the sides of the broach it may be easily withdrawn for
a slight distance, and then engaging in the surrounding
cotton it is used as a pluggcr to pack the cotton ahead of
it, and the plugging action continues until the material is
all ])a('ked in })lace. The adjustment of the cotton to the
broach as described really forms a tube-like arrangement
of the cotton with the instrument in its central lumen
an arrangement greatly favoring the operation of carrying
the cotton into place and enabling the operator to use the
cotton or any suitable fiber as a vehicle for canal dressings
or for permanent filling in connection with the oxychlorid
of zinc cement.
If gutta-percha be the material selected for filling the
canal, a careful examination is made to determine whether
the apical foramen be comparatively large or very small
in the latter case chloro-])ercha may be first pumped into
the canals ; in the former it is wiser to omit the fiuid,
owing to the possibility of passing it through the apical
foramen. In all cases where a canal filling is to be made
of gutta-percha cones it is advisable to first lubricate the
walls of the canal with one of the antiseptic oils, cinnamon,
eucalyptus, or cajuput ; these will facilitate the passage of
the point to the apex, and as solvents of gutta-percha will
J soften its surface and permit a more close adaptation to
the canal walls. Should the apical foramen be found large
enough to admit the pointed extremity of one of the gutta-
])ercha cones, the end of the latter is cut oif. The canal is
lubricated with the oil, the cone itself dipped in the same
medium, its base caught upon the end of a canal plugger,
and it is passed carefully into the canal as far as it will go,
when the plugger is withdrawn ; blasts of hot air from a
hot-air syringe are directed against the exposed end of the
cone until it is softened, and it is then pressed firmly into
position by means of fine pluggers. A sufficient number
Flagg's dress- of cones are added, softened and packed in position, filling
ing pliers.
the canal flush with the pulp chamber.
In fine tortuous canals it is the usual practice to first pumji them
full of thin chloro-percha. A portion of the solution is caught be-
466 THE TREATMENT AND FILLING OF ROOT CANALS.
is ordinarily done where a roughened eotton-earryino- ])rol)e Is used.
With a smootli broach and the cotton fiber iehcd on as (k'scribed the
broach may be pnshed forward with considerable force into a canal
Avithout piuicturing the cotton, which is securely carried as
Fig. 455.
far as the broach will go. On account of the smoothness
of the sides of the broach it may be easily withdrawn for
a slight distance, and then engaging in the surrounding
cotton it is used as a pluggcr to pack the cotton ahead of
it, and the plugging action continues until the material is
all ])a('ked in })lace. The adjustment of the cotton to the
broach as described really forms a tube-like arrangement
of the cotton with the instrument in its central lumen
an arrangement greatly favoring the operation of carrying
the cotton into place and enabling the operator to use the
cotton or any suitable fiber as a vehicle for canal dressings
or for permanent filling in connection with the oxychlorid
of zinc cement.
If gutta-percha be the material selected for filling the
canal, a careful examination is made to determine whether
the apical foramen be comparatively large or very small
in the latter case chloro-])ercha may be first pumped into
the canals ; in the former it is wiser to omit the fiuid,
owing to the possibility of passing it through the apical
foramen. In all cases where a canal filling is to be made
of gutta-percha cones it is advisable to first lubricate the
walls of the canal with one of the antiseptic oils, cinnamon,
eucalyptus, or cajuput ; these will facilitate the passage of
the point to the apex, and as solvents of gutta-percha will
J soften its surface and permit a more close adaptation to
the canal walls. Should the apical foramen be found large
enough to admit the pointed extremity of one of the gutta-
])ercha cones, the end of the latter is cut oif. The canal is
lubricated with the oil, the cone itself dipped in the same
medium, its base caught upon the end of a canal plugger,
and it is passed carefully into the canal as far as it will go,
when the plugger is withdrawn ; blasts of hot air from a
hot-air syringe are directed against the exposed end of the
cone until it is softened, and it is then pressed firmly into
position by means of fine pluggers. A sufficient number
Flagg's dress- of cones are added, softened and packed in position, filling
ing pliers.
the canal flush with the pulp chamber.
In fine tortuous canals it is the usual practice to first pumji them
full of thin chloro-percha. A portion of the solution is caught be-
