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Advances in Materials Science and Engineering
Volume 2013 (2013), Article ID 128065, 7 pages
http://dx.doi.org/10.1155/2013/128065
Research Article

Influence of Surface Treatment on Strength Distribution of Vita VMK 68 Dental Porcelains

Marine Engineering Department, Faculty of Engineering, Zirve University, 27260 Gaziantep, Turkey

Received 12 June 2013; Revised 22 August 2013; Accepted 24 August 2013

Academic Editor: Liyuan Sheng

Copyright © 2013 Serkan Nohut et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Weibull distribution function is the most commonly used statistical model for the investigation of mechanical properties of dental ceramics and design process with dental ceramics. However, it is still unclear whether the Weibull distribution function is the most appropriate function for fitting the strength data of dental ceramics with different surface treatments. In this paper, three-point bending test results of feldspathic body porcelain (Vita VMK 68) specimens with four different surface treatments are analysed. According to goodness-of-fit tests (Anderson-Darling test, Kolmogorov-Smirnov test, and Akaike information criterion), it is shown that the type of surface treatment has an important influence on deviation of strength distribution from perfect Weibull statistics. It is concluded that estimation of the most suitable statistical model for Vita VMK 68 is not only a material-dependent but also a process-dependent (machining of the specimens) procedure.