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26-4 THE TECHNICAL PROCEDURES IN FILLING TEETH.

a tooth found in this condition. This arrangement simplifies
this matter greatlj^ and it is desirable that the manufacturers
find sufficient encouragement to place these in their general list
of supplies. For this purpose, two extra bars should be pro-
vided. The first one should be enough longer than the labial
bar usually sold that it (the present labial bar) maj'^ be used as
the lingual bar, and the new bar used as the labial bar. The
change requires that the two bars be screwed out and the
exchange made as stated. The second additional bar would
work as the labial bar with the first additional bar as the lingual
bar, making the extension so much greater. Much the better
plan, however, would be to have the additional separators with
the long bars complete.