Page 82 - My FlipBook

66 THE TREATMENT OF TEETH
blow. The best manner of adjusting tbe blow will
also, no doubt, vary in different mallets. The writer
finds as the result of testing fillings (made out of the
mouth), for cohesion, that with the automatic mallet
he prefers to use, a long stroke and a light blow give
better results than a short stroke and a heavy blow
;
and for ease of manipulation, comfort of the patient,
and general efficiency, he has adopted a medium or
light medium blow, and an adjustment of the length
of stroke or blow that is exactly midway between the
longest and shortest adjustments. He also finds,
as the result of trying them on his own teeth, that
an automatic mallet is the least disagreeable of all
the mallets he has used. The various dental ensrine
and electric mallets are much liked by some
operators, and the use of suspension electric dental
engines enables the engine mallets to be used with
the greatest convenience. The writer finds that
these fast-striking mallets greatly interfere with the
sense of touch, and it is consequently difficult to
know exactly when the gold is condensed. He
also finds that the blow of some of these instru-
ments is so indistinct (more a vibration than a blow),
that it is necessary either to use them with great
pressure—which is disagreeable to the patient—or
else spend a very long time in condensing each layer
of gold. These instruments, however, vary in their