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THE FORCE USED IN MASTICATION. 171
the teeth and bolting it, the necessary trainiug will be the same,
but the preparatory treatment will be unnecessary.
In preparatory work of this kind the utmost care should
be had to see that food does not crowd into some interproximal
spaces and cause pain or injury to the gum septums. Leaving
opportunity for this will often defeat the whole scheme of treat-
ment. The key to the whole matter is that the patient shall find
that chewing food becomes a pleasure.