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[Plax more effective than water?].

Ten persons participated in a cross-over study in which the effect of rinsing with Plax and subsequent toothbrushing was compared with water rinsing and subsequent toothbrushing. Plaque was evaluated at baseline and after rinsing and toothbrushing. Bacterial and epithelial cells were counted in the material that was removed by rinsing and brushing. In addition the dry-weight of this material was determined. The differences between Plax and water in plaque reduction, the number of bacterial and epithelial cells in the material removed from the mouth were statistically not significant. The weight of the material removed by the rinsing and brushing was higher after rinsing with Plax. This was caused by the more vigorous removal of epithelial cells by Plax than by water.