Effects of Zirconia Addition on Fracture Toughness and Bending Strength of Dental Porcelains

Masayuki Kon, Kunio Ishikawa, Norihiko Kuwayama

研究成果: ジャーナルへの寄稿記事

19 引用 (Scopus)

抜粋

Zirconia dispersed composite porcelains with glass and aluminous porcelain as matrix were prepared as models of dental porcelains. The bending strength and fracture toughness of the composite porcelains were examined. The bending strength and fracture toughness of composite porcelains containing 50 wt% zirconia were 20 to 80 % greater than in glass alone. However, bending strength and fracture toughness decreased upon the addition of zirconia at more than 50 wt%. Moreover, in the case of aluminous porcelain as matrix, fracture toughness increased to a maximum value of 2.6 MPam1/2by addition of 23 wt% zirconia, twice the toughness of glass alone. On the other hand, no increase of bending strength was observed in this case. Deflection and bowing of cracks as well as microcracking effects were related to these increases of mechanical properties in zirconia dispersed composite porcelains.

元の言語英語
ページ(範囲)181-192230
ページ数192050
ジャーナルdental materials journal
9
発行部数2
DOI
出版物ステータス出版済み - 1 1 1990
外部発表Yes

    フィンガープリント

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Dentistry(all)

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