A-6 球状シリカ微粒子とジルコニア微粒子の複合添加による改良型MTAセメントの開発(セメント,一般講演(口頭発表),第63回日本歯科理工学会学術講演会)

概要

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MTA has been utilized for endodontic treatment, however, the granular consistency and slow setting time often makes MTA difficult to use. The object of this study was to improve handling characteristics of MTA by the addition of particulate mixture of spherical silica and zirconia to Portland cement powder. The consistency, setting time, and radiopacity of the Portland cement were decreased with an increase in the amount of silica particle up to 20 mass%. The compressive strength of the Portland cement with 20 mass% silica particles was 50 MPa while that of MTA cement was 28 MPa. The radiopacity of the Portland cement was increased by the addition of silica and zirconia particles without reducing handling properties and mechanical strength.
2014-03-25