“Maintenance of dental health and of reasonable oral cleanliness can be accomplished only by effective personal oral hygiene"
“Injury to the gums is the most general harmful effect of improper use of inappropriate toothbrushes. Frequent traumatizing and injuring the border of the thin gingiva upon the enamel covered crown gradually wears it off from the enamel and forces it to recede beyond the cemento-enamel junction.”
“The smaller size .007" bristle is of still greater importance in, cleaning the teeth at the gingival crevice. This size bristle not only is applicable to the tooth at the exposed gingival margin but it also enters the crevice (Fig. 3) to considerable depth, thus mechanically dislodging, and promoting removal of bacterial and other soft material of the tooth within the crevice.”
"A Clean Tooth Does Not Decay, nor does periodontoclasia occur about a clean tooth." C. C. Bass, M.D.