Bulletin of the National Research Centre

Table 2 Means and standard deviations of pH values after 7 and 14 days for the two tested cements stored in distilled water

From: Solubility, pH change, and calcium ion release of low solubility endodontic mineral trioxide aggregate

Test group	Harvard	ProRoot	P value
pH after 7 days	12.56 ± 0.07	11.97 ± 0.1	≤ 0.001*
pH after 14 days	12.52 ± 0.01	12.04 ± 0.02	≤ 0.001*
Pvalue	0.3	0.3

*significant (P < 0.05)

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