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

Abstract:

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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.

Info:

Periodical:

Key Engineering Materials (Volumes 330-332)

Main Theme:

Edited by:

Xingdong Zhang, Xudong Li, Hongsong Fan, Xuanyong Liu

Pages:

1401-1404

DOI:

10.4028/www.scientific.net/KEM.330-332.1401

Citation:

J. Cui et al., "A New Method for Evaluating Thermal Compatibility of Multi-Layer Dental Ceramic Composites", Key Engineering Materials, Vols. 330-332, pp. 1401-1404, 2007

Online since:

February 2007

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$35.00

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