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Finite element analysis of stress distribution in porcelain discs

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Abstract

Achievement of a controlled stress distribution in feldspathic porcelain is essential for successful dental restorations. In this study, a program for visco-elastic finite element analysis (FEM) of the stress distribution produced during processing of porcelain was developed. This method was applied to simulate the stress change in porcelain discs that were subjected to convective cooling. The heat transfer coefficient was assumed to be 2.1 μJ mm-2 min-1 °C-1 at the surface of the discs. These discs were 2 mm in thickness and had radii varying between 4.8 and 38 mm.

As the discs cooled from their sintering temperature, stresses initially developed at about 600°C. Residual tensile stress of 8.3 MPa was produced at the centre of the top surface of a 16-mm diameter disc compared with a compressive stress of −7.6 MPa for a 50-mm diameter disc.

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Authors and Affiliations

  1. Hiroshima Dental Technician School, 1-1 Sakatahonmachi, Hatsukaichi-shi Hiroshima, 738, Japan

    A NAKATSUKA

  2. Department of Dental Biomaterials, College of Dentistry, University of Florida, Gainesville, FL, 32610-0446, USA

    K. J ANUSAVICE

Authors
  1. A NAKATSUKA
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  2. K. J ANUSAVICE
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NAKATSUKA, A., ANUSAVICE, K.J. Finite element analysis of stress distribution in porcelain discs. Journal of Materials Science 32, 3621–3627 (1997). https://doi.org/10.1023/A:1018678313122

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  • DOI: https://doi.org/10.1023/A:1018678313122

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