Paper Title:
Flexural Strength Measurement of Ceramic Dental Restorative Materials
  Abstract

Flexural strength of a dental material reflects its ability to withstand tensile stresses and thus the fracture risk of a filling. The flexural strength of an experimental bioceramic Calcium aluminate-based (CA) dental restorative material was measured using three different methods with a composite (Tetric Ceram), a glass ionomer cement (Fuji II) and a phosphate cement (Harward) as references. The three test methods were: a) ISO 4049 for dental composites, 3-point bend test b) EN 843-1 for ceramic materials, 3-point bend test and c) ASTM F-394, biaxial ball-on-disc for ceramic materials. The strength of the CA-material, tested in the ball-on-disc method, is close to the theoretical strength based on the microstructure of the material (max. grain size of 15 μm). The composite material and the phosphate cement were rather insensitive to the test method, while the glass ionomer cement as the CA-material showed sensitivity towards the test method. A modified biaxial test method for evaluation of strength of dental materials in a close to real-life component is proposed.

  Info
Periodical
Key Engineering Materials (Volumes 361-363)
Main Theme
Edited by
Guy Daculsi and Pierre Layrolle
Pages
873-876
DOI
10.4028/www.scientific.net/KEM.361-363.873
Citation
L. Hermansson, L. Kraft, K. Lindqvist, N. O. Ahnfelt, H. Engqvist, "Flexural Strength Measurement of Ceramic Dental Restorative Materials", Key Engineering Materials, Vols. 361-363, pp. 873-876, 2008
Online since
November 2007
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Price
$32.00
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