Different Setting Conditions Affect Surface Characteristics and Microhardness of Calcium Silicate-Based Sealers

Dong Kyu Yang, Sunil Kim, Jeong Won Park, Euiseong Kim, Su Jung Shin

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Objective. To investigate the effect of different setting conditions on surface microhardness and setting properties of calcium silicate-based sealers. Methods. Three sealers, EndoSequence Bioceramic (BC; Brasseler USA, Savannah, GA, USA), Endoseal MTA (ES; Maruchi, Wonju, Korea), and Well-Root ST (WR; Vericom, Chuncheon, Korea), were compared. Specimens were exposed to either butyric acid (pH 5.4) or phosphate-buffered saline (PBS [pH 7.4]) for 48 h and stored at 100% humidity for 12 days. The control specimens were stored at 100% humidity for 14 days. Surface microhardness was measured, topographic changes were observed, and phase analysis was performed using X-ray diffraction. Microhardness according to storage conditions was compared using one-way analysis of variance and Tukey's multiple comparison tests (P<.05). Results. The BC and ES sealers exhibited decreased microhardness when stored in acid or PBS compared with control (P<.05). In the WR group, acid exposure lowered microhardness of the specimens compared with control (P<.05). Scanning electron microscopy revealed different topographies in specimens from all tested sealers exposed to acid or PBS. Conclusion. The surface microhardness of calcium silicate-based sealers was reduced by exposure to either acid or PBS. Acid solutions, however, had a more detrimental effect than PBS.

Original languageEnglish
Article number7136345
JournalScanning
Volume2018
DOIs
Publication statusPublished - 2018

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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