Page 118 - My FlipBook

114 THE TECHNICAL PROCEDURES IN FILLING TEETH.

In distal cavities in bicuspids and molars it is more
difficult to obtain the best angle of force, and often the building
must proceed differently. The angle of force inclined from the
distal toward the mesial can not generally be obtained, and it is
necessary to substitute an inclination from the buccal
toward the lingual. In the beginning, build a thick mass of
gold in the axio-linguo-gingival angle, and gradually extend it
out to the cavo-surface angle of the cavity at that point ; then
continue the building, keeping the plane of the surface of gold
being built sloping occluso-gingivally from lingual to buccal,
gradually covering the gingival wall and its cavo-surface angle,
until the bucco-gingival angle is reached. Then wedge the
gold into the bucco-gingival angle, between the gold already
built and'the buccal wall. After this is accomplished the build-
ing will proceed without especial difficulty. In accomplishing
this the greatest difficulties will be found in lower bicuspids that
have a distal and lingual inclination, and occasionally in lower
molars that have a strong lingual inclination. In these the
reverse pluggers are a necessity to easy and safe w^ork.
With these the procedure is the same as in mesial cavities, except
that the order is reversed, as the left hand is the reverse of the
right. Begin in the axio-bucco-gingival angle and work along the
axio-gingival angle to the lingual, and generally fill the axio-
linguo-gingival convenience point with a direct plugger. After
this is accomplished the building is not difficult. In making these
fillings entirely with direct pluggers, hand pressure lateral to the
direction of the shaft of the instrument is often necessary in
starting the filling, and in building over the gingival cavo sur-
face angle, and also in much of the building against the buccal
wall.
In proximate cavities in the incisors and mesial sur-
faces of the cuspids, no great difficulty will be found in
gaining the proper angle of force in building over the gingival
wall and its cavo-surface angle. These, like all other gingival
walls and margins, should be covered only after having secured
a mass of gold in the axio-gingival line angle, and then keeping
the plane of the surface of gold being built sloped at an angle of
about twelve centigrades to the long axis of the tooth until the
gingival wall and its cavo-surface angle are covered.