Hiroshi Kuwahata

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The deterioration of the mechanical properties of composite resins was examined. The bending strength and the stress relaxation rate for sixteen experimental composite resins with different filler shapes, particle sizes and filler contents immersed in distilled water for 0-60 days were measured. The bending strength of all of the composites decreased with(More)
Dust figures can be used to visualize the distributions of positive and negative charges that remain on the surface of an insulator using two types of charged powder; one is attached to the insulator and positive charges, and the other is attached to negative charges. In this study, dust figures were used to visualize the spreading pattern of an(More)
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