Richness and diversity of plaque during the induction of experimental gingivitis.

<p>Box-and-whisker plots comparing the species-level OTU richness and diversity of time points during experimental gingivitis. The top and bottom boundaries of the boxes show the 75^th and 25^th percentile and the ends of the whiskers show the maximum and minimum values. Bold lines within the boxes represent median values (50^th percentile). (<b>A</b>) Number of observed OTUs at baseline (B), one week (W1) and two weeks (W2). (<b>B</b>) Simpson's inverse diversity index at baseline (B), one week (W1) and two weeks (W2).