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The graph shows a plot of compressive strength over time in elution (days) for the six different poragen fractions (0, 1, 2, 4, 8, 16 g xylitol). Data are expressed as the mean of five samples; error bars = SD. Compressive strength decreased with increasing poragen fraction (p < 0.001) and increasing time in elution (p < 0.001). The dashed line represents the control (no antimicrobial) [Ctrl (No Ab)]. The lower horizontal line represents the ISO standard of 70 MPa.
