2018 Volume 61 Issue 4 Pages 235-240
Purpose: Recently developed self-adhesive resin cement that does not require pretreatment is now available on the market. However, it is considered that postoperative pain after inlay restoration may be related to the acidity of the dental cement immediately after mixing. Therefore, we measured the pH values of different self-adhesive resin cements and investigated the determinations of pH after mixing.
Methods: Maxcem Elite (Kerr), Clearfil SA Cement Automix (Kuraray Noritake) and RelyX Unicem 2 Automix (3M ESPE) were used as the test materials. The mixing of each material was carried out according to the manufacturer’s instructions. Advantec pH paper was immersed in distilled water and allowed to react with the sample for 3 min. Referring to the standard pH color chart, the pH value was determined immediately after mixing, and 5 min, 10 min, 24 h, 48 h and 72 h after mixing. The data was statistically analyzed using Tukey’s test (n=3).
Results: Maxcem Elite showed no significant change between immediately after and 72 h after mixing (pH=3.0). The pH of Clearfil SA Cement Automix and RelyX Unicem 2 Automix immediately after mixing was 2.5 and 2.8, respectively, but rose to 7.4 and 6.2 after 72 h.
Conclusion: The pH of Clearfil SA Cement Automix and RelyX Unicem 2 Automix was low immediately after mixing but approached neutrality after 72 h. On the other hand, the pH of Maxcem Elite remained low from immediately after mixing to 72 h after mixing.
