Jeong-Won Park

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OBJECTIVES To evaluate the inhibitory effect of ursolic acid (UA)-containing composites on Streptococcus mutans (S. mutans) biofilm. MATERIALS AND METHODS Composite resins with five different concentrations (0.04, 0.1, 0.2, 0.5, and 1.0 wt%) of UA (U6753, Sigma Aldrich) were prepared, and their flexural strengths were measured according to ISO 4049. To(More)
OBJECTIVES This study was performed to determine whether the combined use of one-bottle self-etch adhesives and composite resins from same manufacturers have better bond strengths than combinations of adhesive and resins from different manufacturers. MATERIALS AND METHODS 25 experimental micro-shear bond test groups were made from combinations of five(More)
Does the dryness of tooth surface influence the bonding efficacy of self-adhesive resin cement? I would like to know how much I should dry the tooth surface for better adhesion of self-adhesive resin cement. Q Self-adhesive resin cements are designed to adhere to the tooth substrate without a separate adhesive or etchant. The first commercial product, RelyX(More)
Inspection of unpiggable pipeline becomes one of major issues in the gas pipelines industry. Remote field eddy current testing (RFECT) has strong potential for inspecting unpiggable pipelines among the various NDE methods. Thus, in this study, design of RFECT system including driving coil, sensing coil and passive scanning module and intial experimental(More)
1. ABSTRACT Velocity retrieval of a moving object from recorded signals by a single-channel SAR is a difficult task. To retrieve a velocity of moving object, it is necessary to estimate the speeds of the object in two dimensions of range and azimuth. Both azimuth and range (or antenna line-of-sight) component of target moving motion changes the Doppler(More)
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