The effect of nano-sized ß-tricalcium phosphate on remineralization in glass Lonomer dental luting cement

Y. W. Hong, J. H. Kim, B. H. Lee, Y. K. Lee, B. J. Choi, J. H. Lee, H. J. Choi

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9 Citations (Scopus)

Abstract

This study aimed to evaluate the anticariogenic and remineralization effects of the glass ionomer dental luting cement containing nano-ß-TCP in vitro. The ß-Tricalcium Phosphate (ß-TCP) are the components of dental enamel and bone mineral as biological apatites. In addition, ß-TCP contains a significant amount of calcium and phosphate, which can promote remineralization of enamel subsurface lesions in animal and human. RelyX™ glass ionomer cement(3M/ESPE, USA) was used as dental luting cement. Film thickness, setting time, and compressive strength was measured for each group of pure glass GIC, 15% nano-ß-TCP GIC. Human molars were prepared in box-shaped cavities that were filled with the GIC with and without the 15% nano-ß-TCP were placed in 25ml of pH 5.0 acid buffer for 4 days at 37 °C. After 4 days, longitudinal sections (100μm) were obtained through the center of each restoration. The sections were analyzed using a scanning electronic microscope (SEM) and confocal laser scanning microscopy (CLSM) to identify the change in the enamel surface. A significant difference in the CLSM images between pure GIC and nano-ß-TCP-GIC. CLSM allows the demineralized surface layers of sound enamel to be visualized down to approximately 100 μm. The pure GIC specimens had a relatively thick fluorescent layer. On the other hand, the fluorescent layer of the nano-ß-TCP-GIC specimens were thinner. The SEM images of micro surfaces demonstrate that nano-ß-TCP-GIC is less rough than pure GIC. Therefore, the addition of nano-ß-TCP enhanced protection against acid demineralization and promoted remineralization of enamel surface.

Original languageEnglish
Pages (from-to)861-864
Number of pages4
JournalKey Engineering Materials
Volume361-363 II
Publication statusPublished - 2008

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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