Synthesis of partial stabilized cement-gypsum as new dental retrograde filling material

S. Sadhasivam, Jung-Chih Chen, S. Savitha, Ming Xiang Hsu, Chung King Hsu, Chun Pin Lin, Feng Huei Lin*

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

The study describes the sol-gel synthesis of a new dental retrograde filling material partial stabilized cement (PSC)-gypsum by adding different weight percentage of gypsum (25% PSC + 75% gypsum, 50% PSC + 50% gypsum and 75% PSC + 25% gypsum) to the PSC. The crystalline phase and hydration products of PSC-gypsum were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. The handling properties such as setting time, viscosity, tensile strength, porosity and pH, were also studied. The XRD and microstructure analysis demonstrated the formation of hydroxyapatite and removal of calcium dihydrate during its immersion in simulated body fluid (SBF) on day 10 for 75% PSC + 25% gypsum. The developed PSC-gypsum not only improved the setting time but also greatly reduced the viscosity, which is very essential for endodontic surgery. The cytotoxic and cell proliferation studies indicated that the synthesized material is highly biocompatible. The increased alkaline pH of the PSC-gypsum also had a remarkable antibacterial activity.

Original languageEnglish
Pages (from-to)1859-1867
Number of pages9
JournalMaterials Science and Engineering C
Volume32
Issue number7
DOIs
StatePublished - 1 Oct 2012

Keywords

  • Dental materials
  • Endodontics
  • Gypsum
  • Hydroxyapatite
  • Partial stabilized cement
  • Setting time

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