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Indentation Fracture Toughness Testing of and Crack Propagation Mode in Dental Composites

Published online by Cambridge University Press:  26 February 2011

Jack L. Ferracane
Jack L. Ferracane*
Affiliation:
Dept. of Dental Materials, Baylor College of Dentistry, 3302 Gaston Ave., Dallas, TX 75246
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Abstract

The use of a Vicker's indenter to measure the fracture resistance of dental composite resins was correlated to fracture toughness results obtained by bending of notched bars. There is a fair correlation between the methods, but many dental composites do not form cracks by the indentation technique, thereby limiting its usefulness. SEM micrographs reveal a crack propagation mode which is mostly through the matrix and along the filler/matrix interface, with evidence of particle fracture

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 110: Symposium M – Biomedical Materials and Devices , 1987 , 619
Copyright
Copyright © Materials Research Society 1988

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