J Korean Acad Pediatr Dent.  2022 Nov;49(4):379-391. 10.5933/JKAPD.2022.49.4.379.

pH, Ion Release Capability, and Solubility Value of Premixed Mineral Trioxide Aggregates

Affiliations
  • 1Department of Pediatric Dentistry, College of Dentistry, Dankook University, Cheonan, Republic of Korea
  • 2Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, Republic of Korea
  • 3Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
  • 4Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea
  • 5UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan, Republic of Korea

Abstract

The current study aimed to compare the pH, solubility value, and ion release capability of premixed mineral trioxide aggregates (MTAs) versus conventional pulp capping materials before and after setting. The following materials were used: resin-modified calcium silicate cement (TheraCal LC®, TLC), resin-modified calcium hydroxide cement (Ultra-BlendTM plus, UBP), and 2 kinds of premixed MTA (Endocem MTA® premixed regular 〔EMPR〕 and Well-RootTM PT 〔WRP〕). The specimens of each material were prepared before and after setting and were immersed in distilled water. The materials’ pH and solubility value were assessed. Next, three kinds of ion (calcium, sulfide, and strontium) released by pulp capping materials were evaluated via inductively coupled plasma atomic emission spectrometry. In the after-setting group, the pH of TLC and UBP decreased. However, the pH of the premixed MTAs increased with time. TLC released a higher concentration of strontium ion compared with the other materials. Meanwhile, EMPR released a significantly high concentration of sulfide ion (p < 0.05). In the after-setting group, the 2 kinds of premixed MTAs released a significantly higher concentration of calcium ion compared with the other materials (p < 0.05). In the after-setting group, EMPR had a significantly low solubility value (p < 0.05). The Kruskal-Wallis test, followed by the Mann-Whitney U test with Bonferroni correction, was used in statistical analysis. In conclusion, resin-modified calcium silicate cement, modified calcium hydroxide cement, and the 2 kinds of premixed MTAs had an alkaline pH and low solubility value and they released various concentrations of ions after setting.

Keyword

Pulp capping materials; Premixed MTA; pH; Solubility; Ion release
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