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ALP activity of osteoinductive DPSCs on different surface treated titanium, zirconia and BioHPP after 14 and 21 days. ALP activity was increased in general after UV light and NTP treatment compared to control groups. The increase in ALP between the experimental groups and their corresponding control group was statistically significant except for the argon treated surface of titanium at 14 days and BioHPP at 21 days. * p < 0.05.
