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160 PATHOLOGY OF THE HARD TISSUES OF THE TEETH.
on to the gum tissue and a new lodgment occurs, and this con-
tinues meal after meal, day after day, until the gum tissue is
pushed aside, and a great pocket is formed between the teeth.
If this food lies continually between the teeth, fermentation will
or putrefactive decompo-
go on, giving rise, perhaps to caries ;
sition may occur with disease of the peridental membrane. Many
eases of disease of the gums are begun in that way, and the
dentist should guard this point very carefully.
