Dental Materials Journal
Online ISSN : 1881-1361
Print ISSN : 0287-4547
ISSN-L : 0287-4547
Original Paper
Correlations among bending test methods for dental hard resins
Daisuke MIURATaira MIYASAKAHarumi AOKIYusuke AOYAGIYoshiki ISHIDA
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2017 Volume 36 Issue 4 Pages 491-496

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Abstract

Three types of bending tests —the 3-point bending test, 4-point bending test and biaxial flexural test— were performed to examine the correlations among the testing methods for dental hard resins (HRs). The results for 5 HRs showed that the bending strengths in descending order were: biaxial flexural strength>3-point bending strength>4-point bending strength. Regression analysis of the test methods indicated that the coefficients of determination were large for all test methods; the largest was for the combination of the 4-point bending test and biaxial flexural tests. The Weibull moduli ranged from 5.42 to 10.61, and a similar descending-order trend was found in the Weibull characteristic strength (S0) of the test methods. The biaxial flexural test method is thus a valid test of the flexural strength of dental hard resins.

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© 2017 The Japanese Society for Dental Materials and Devices
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