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HomeKey Engineering MaterialsKey Engineering Materials Vols. 330-332A New Method for Evaluating Thermal Compatibility...

A New Method for Evaluating Thermal Compatibility of Multi-Layer Dental Ceramic Composites

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Abstract:

Dental ceramic materials do not always show linear expansion behavior. In general, thermal contraction behavior of dental porcelain can be described with the polynomial function: L/L= C+α1 T+α2 T2. In addition, a new method for taking into consideration of nonlinear contraction behavior of dental ceramics is proposed for calculating thermal mismatch value (α) between substrate and veneering materials. Discs of eight substrate/veneer combinations (n=10) were fabricated for thermal shock testing. In this study, a stepwise multiple regression analysis was performed to determine the relationship between thermal shock test results and thermal mismatch value (α) on these combinations. A high degree of correlation was found between αs-b and T. The new method proves to be a reliable one to predict thermal compatibility of multi-layer dental ceramic composites.

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Bioceramics 19

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Periodical:

Key Engineering Materials (Volumes 330-332)

Pages:

1401-1404

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.330-332.1401

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Online since:

February 2007

Authors:

Jun Cui, Jun Ou, Yong Lie Chao, Q.P. Gao, Guang Fu Yin, H. Wang, J.F. Shen, Yang Xi Chen

Keywords:

Dental Ceramic, Thermal Compatibility, Thermal Contraction Measurement, Thermal Shock Test

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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