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Box-and-whisker plot of diametral tensile strength (DTS) of Flow-Art material. Statistically-significant differences were detected between the following: (a,b) Protocol 6 (water, 5 days, 55 °C) vs. (a) Protocol 2 (artificial saliva, 90 days, 37 °C) (p = 0.028899); (b) Protocol 5 (0.1 M NaOH, 7 days, 60 °C) (p = 0.026107).
