Page 598 - My FlipBook

290 THE TECHNICAL PKOCEDURES IN FILLING TEETH.

pens ill these that the filling must be made without much change
of the line of force used, which will be directed from mesial to
distal with an inclination to the lingual and gingival. If this
line of force is exclusively used, there is certain to be imperfect
adaptation to the occlusal wall of the cavity. The large number
of cases observed showing leakage along this wall give warning
of the danger of neglect in changing the line of force sufficiently
often to proijerly wedge the gold against this wall. Another
point of special care is the mesial wall of cavities of this class
far back in the mouth. Occasionally, it will be necessar_y to use
the right-angle plugger with hand pressure in these positions.
A little neglect of the proper line of force in wedging is sure to
bring defeat, and eventual loss of the filling.