Abstract
The effects of the Tannin-Fluoride preparation, called the HY-agent, on dentin substrate were examined by immersion of the dentin previously treated with HY-agent into the calcifying fluid at 37℃.
The changes in the nature of the dentin surface and penetration of elements in the dentin were observed.
CaF2 was formed on the dentin as a result of a reaction between F, an element of the HY-agent, and Ca which precipitated from the calcifying fluid.This observation was confirmed by means of the X-ray diffraction method.
Penetration of F, Zn, Sr and Ca into dentin was confirmed by the use of an electron probe X-ray microanalyser(EPMA).
Application of the HY-agent to the dentin for sevendays increased the hardness of the dentin about 10%.
Application of the HY-agent to the dentin for sevendays increased the contact angle about 3%.These results suggested that the organic and inorganic matter in dentin can be stabilized effectively both chemically and physically by treatment with an HY-agent.
