Page 113 - My FlipBook

FILLING WITH GOLD. 109

we need some special forms of shank. Especially in filling upon
the gingival walls of proximate cavities in the bicuspids and
molars, a straight or nearly straight plugger would necessarily
bring the angle of force almost perpendicular to the plane of
the wall. In order that a more desirable angle of force may be
had, a contra-angled shank is provided that will reach over the
proximating tooth and permit an inclination of about twelve cen-
tigrades of the angle of force toward this wall. In your sets
there is a pair of these in parallelogram forms of impacting area
in which the width of blade is in opposite directions to the plane
of the curves of the shank.
For filling the incisal anchorages of incisor cavities an angle
of twenty-five centigrades (a right-angled plugger) is provided
which is used entirely by hand pressure. This instrument,
though used only for this one purpose, is a necessity to every
outfit. These are, with the exception of the foot pluggers, the
only curves of shanks required, and are quite sufficient for ordi-
nary filling operations.
In addition to these the school has provided reverse plug-
gers of several patterns, which are issued upon order of the
demonstrators for use in some especially difficult positions.
These are occasionally needful for certain positions in filling
lower molars and bicuspids, especially for packing against buccal
walls in teeth that have a strong lingual inclination.
List of Pluggers Required.
University No. 4, 5x10-3-3 ) Face rounded on dimension lo
;
University No. 5, 10x5-3-3 ^ serrated.
University No. 6, 4x6-5-5 I
^^""^ ^""^ ^'^'''^^^'^
University No. 7, 6x4-5-5 ^ '
University No. 9, 6x12-6-10) Contra-angled ; face rounded on
University No. 10, 12x6-6-10) dimension 12; serrated.
University No. 14, 5-2-23.
No. 7, 5-10-3
I
No. 8, 7-10-3 - Round.
No. 9, 10-10-3 3
No. 322, 4x4 Bayonet ; serrated.
^o- 393. 5x20. Angle of face 20 ; serrated.
No. 408, 5x20-5-15
I
)^'°°^-
VarneyNo. 5, 5x15-3-6