In xerostomia The amount of bacteria t The quality of plaque change S mutans, Lactobacillus, Yeast, Actinomyce t S sanguis, Veillonella, NeisseriaIn xerostomia The amount of bacteria The quality of plaque change S.mutans, Lactobacillus, Yeast, Actinomyce S. sanguis, Veillonella, Neisseria