Study of Ceramic-Polymer Composites Reliability Based on the Bending Strength Test

Abstract

In this paper the reliability assessment of structural reliability of the selected light-cured dental composites based on the biaxial flexural strength test results has been presented. A two-parameter Weibull distribution was applied as a reliability model in order to estimate probability of strength maintenance in the analysed population. Weibull distribution parameters were interpreted as a characteristic material strength (scale parameter) and structural reliability parameter in terms of ability to maintain strength by each of specimen from the general population (shape parameter). 20 composite specimens underwent strength tests, including 2 "flow" type composites and 2 standard composites (with typical filler content). "Flow" type composites were characterized with lower characteristic strength and higher structural reliability comparing to other studied composites.