Fig 3.

Average elastic modulus (E_R) values across human dentin from most demineralized outer surface of the lesion and proceeding inwards through the depth of the lesion and into sound dentin before (A) and after PILP treatments (B). Results and statistical comparisons from calculations of the differences in areas under the data curves from 0–100 μm (C) and 100–140 μm (D) depths of each group. Means designated with the different capital letters indicate significant differences between groups, using one-way ANOVA and Tukey's multiple comparison tests (*p < 0.05). Mean ± SD; n = 5; dotted red line = shrinkage (designated by pointer).