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Fig. 308: Division of each dental arch into six definite sections, for the purpose of systematic brushing

1 January 1939


The cuspid (in some instances, the first bicuspid), forming a prominent contour of the arch, should be brushed by the bristles at either end of the brush-head and not by the center bristles, to obviate traumatization by uneven pressure with the brush.

Black & white photograph


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