Fig. 4From: “You should brush your teeth better”: a randomized controlled trial comparing best-possible versus as-usual toothbrushingMean and standard error of the means of plaque assessed after brushing by the Marginal Plaque Index (MPI) overall and with respect to plaque at outer, inner, cervical and proximal sections (left panel); percentage of TQHI scores 3–5 referring to rather coronal aspects of the teeth (right panel). *p < 0.05Back to article page