ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Flexural strength of a dental material reflects its ability to withstand tensile stresses andthus the fracture risk of a filling. The flexural strength of an experimental bioceramic Calciumaluminate-based (CA) dental restorative material was measured using three different methods with acomposite (Tetric Ceram), a glass ionomer cement (Fuji II) and a phosphate cement (Harward) asreferences. The three test methods were: a) ISO 4049 for dental composites, 3-point bend test b) EN843-1 for ceramic materials, 3-point bend test and c) ASTM F-394, biaxial ball-on-disc for ceramicmaterials. The strength of the CA-material, tested in the ball-on-disc method, is close to thetheoretical strength based on the microstructure of the material (max. grain size of 15 μm). Thecomposite material and the phosphate cement were rather insensitive to the test method, while theglass ionomer cement as the CA-material showed sensitivity towards the test method. A modifiedbiaxial test method for evaluation of strength of dental materials in a close to real-life component isproposed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.361-363.873.pdf
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