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Fig. 317: [Application of the brush in buccal cleansing]

1 January 1939


A - Improper application of the brush in buccal cleansing. Since only the heel bristles function, the force of the brushing, thus limited to a small area, is likely to be excessive and may entail gingival traumatization [...]. B - Correct position; the brushhead is parallel to the buccal plane of the arch.

Black & white photograph


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