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Fig. 24: Microphotograph of cross-section of molar and toothbrush bristles

1 January 1939

Abstract

Microphotograph of a cross-section of a molar and toothbrush bristles of two different thicknessess, showing the limitations of the bristles in the thorough cleansing of occlusal grooves and fissures (after Bodëcker). This fissure here shown is too narrow to admit even the thinnest bristle.


Black & white photograph

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