Fig. 1
From: Ca2+ release and buffering effects of synthetic hydroxyapatite following bacterial acid challenge
pH and Ca2+ release in planktonic cultures. Results from pH (a) and Ca2+ release measurements (b) in planktonic cultures of S. mutans at baseline and after 24 h and 48 h of culture. All results are depicted medians, 1st and 3rd quartiles from the values of at least 10 independent duplicate experiments. Asterisks indicate statistically significant differences between groups (** p ≤ 0.01; *** p ≤ 0.001)