| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Research Abstract |
The cause for regression of hypersensitivity has not yet been fully elucidated. We have established a method to measure quantitatively dentin permeability, and to analyze the time-based effect of hypersensitivity. The gradual relief of hypersensitivity with time was analyzed by morphological analysis of the dentin slices and measurement of their permeability. Crystal deposition in orifices of dentinal tubules was evident. Even small particle size crystallites not completely obturating dentinal tubules, have a major effect on reduction of permeability. The concentration of hydroxyethyl methacrylate affects the permeability of resin-based material for hypersensitivity. The structure and volume of the internal crystal varies depending on the stock solution in calcium phosphate-based material.
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