Changes in amount of total bacteria in dental plaque after removal. Values shown in closed circles are averages of the amount of total bacteria expressed as logarithm values of the genome weight of 16S rRNA universal in whole collected dental plaque samples (A) following tongue cleaning and (B) without tongue cleaning. Error bars and asterisks are the same as in Figure 1.
Matsui et al. BMC Oral Health 2014 14:4 doi:10.1186/1472-6831-14-4