EPMAによる歯質内フッ素分析に関する基礎的検討(1)

概要

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Effect of embedding of materials on the accuracy to determining the fluoride distribution in human enamel was investigated using EPMA. Extended premolar teeth were soaked in 2% NaF aqueous solution for 60 sec and divided into three groups (A : without embedding, B : embedded in PMMA, C : embedded in gallium alloy) . Each group was analyzed under four different conditions (15 kV : 1 and 5×10^<-8> A, 1 and 5×10^<-7> A). For group A, a highly reproducible value for each of three measurements was obtained under each analyzing condition. The fluoride distribution could be clearly detected on the color map image in groups A and C under higher current value. A SEM in group A showed surface damage by the electron beam under higher current values. In SEM (5×10^<-7> A) of group B, surface contamination was observed due to decomposition products of the surrounding resin due to the heat of the electron beam. However, the color map images for B were as same as those for groups A and C. A layer contaminated by carbon was observed on the enamel surface on the color mapping image in group B, but contamination by gallium was not observed in group C.
福岡歯科大学学会の論文
1997-12-31