合着用セメントの計量誤差とその影響 : 第 3 報コンシステンシーの変動

概要

論文の詳細を見る
It was demonstrated in the previous report that the setting time, film thickness and compressive strength of the luting cements were significantly changed by the variation of powder/liquid (P/L) ratio within the dispensational errors. In the present report, the changes in consistency of the cement slurry resulting from dispensational errors were examined. Significant differences in fluidity were found among the materials used but not among the cement types. The fluidity was significantly decreased with increase in the P/L ratio over the standard ratio recommended by the manufacturer and the slurry could no more get the standard consistency specified for the zinc phosphate cement at the maximum P/L ratio within the dispensational errors in most of the materials used. As the P/L ratio decreased beneath the standard ratio, the fluidity was significantly increased to yield the standard consistency interacting with the time elapse after the end of mix in all the materials. The foregoing results will be also applied to the clinical practice to intentionally alter the P/L ratio to get the proper consisitency if only referring the effects on the other characteristics demonstrated in the previous papers.
九州歯科学会の論文
1993-08-25