Tooth brushing causes mechanical disruption of the dental plaque bio film. It is justified scientifically to assess the efficacy of toothbrushing intervention during and after formation of plaque formation. Many studies have assessed the efficacy of either tooth brushing techniques or the bristles after 1 week. But none of the studies have provided explanation regarding the rational for using 1 week as the outcome assessment period. Could anyone help me answer this question please?

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