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Physicochemical properties of radiopaque dicalcium silicate cement as a root‐end filling material in an acidic environment
Author(s) -
Chiang T. Y.,
Ding S. J.
Publication year - 2013
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1111/j.1365-2591.2012.02112.x
Subject(s) - cement , distilled water , materials science , ultimate tensile strength , porosity , apatite , dental cement , silicate , composite material , mineralogy , chemical engineering , chemistry , chromatography , adhesive , layer (electronics) , engineering
Aim To investigate the effect of two solutions differing by pH (7.4 and 4.0) on the physicochemical properties of a radiopaque dicalcium silicate cement. Methodology The cement was prepared by hand‐mixing the dicalcium silicate powder with distilled water in a liquid‐to‐powder ratio of 0.4 mL g −1 . A total of 253 cement specimens with dimension of 6 mm (diameter) × 3 mm (height) were used. The morphology, weight loss, porosity and diametral tensile strength of the cement were evaluated after soaking in a solution for different time intervals, in addition to pH changes in the cement‐immersed solutions. Results After soaking in a pH 7.4 solution for 1 day, the particle size of precipitated apatite spherulites on the cement surfaces was greater than that obtained in a pH 4.0 solution. Solution pH did not result in a significant difference ( P > 0.05) in diametral tensile strength of cement specimens at the same soaking time‐point. On day 30, the sample was associated with a weight loss of 0.8% in a pH 4.0 solution, whereas in a pH 7.4 solution, a weight increase of 0.2% occurred. A greater porosity of the cement soaked in a pH 4.0 was found compared with that in the solution with pH 7.4. Soaking time affected significantly ( P < 0.05) the porosity, weight change and strength of the cements in an acidic environment more than at pH 7.4. Conclusions High apatite–forming activity and low degradation were the characteristics of a radiopaque dicalcium silicate cement.