Variables Affecting the Fracture Toughness of Dental Composites:,, and '

J. L. Ferracane, R. C. Antonio, H. Matsumoto

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Abstract

The fracture toughness of a variety of dental composites was evaluated using notched bending specimens, with and without pre-cracks. The pre-crack simulates more accurately a sharp, natural flaw in a material than does a notch, and is standard procedure in fracture-toughness evaluation. The fracture toughness was related to the filler composition and degree of conversion in the composite resins. In general, fracture toughness was highest in the more heavily filled resins, independent of degree of conversion in the matrix. The results also show that producing a pre-crack in certain composites reduced the value of their fracture toughness compared with notched-only specimens.

Original languageEnglish (US)
Pages (from-to)1140-1145
Number of pages6
JournalJournal of dental research
Volume66
Issue number6
DOIs
StatePublished - Jun 1987

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ASJC Scopus subject areas

  • Dentistry(all)

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