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Flexural Strength Measurement of Ceramic Dental Restorative Materials
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
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2008 (English)In: BIOCERAMICS, VOL 20, PTS 1 AND 2 / [ed] Daculsi G, Layrolle P, 2008, Vol. 361-363, p. 873-876Conference paper, Published paper (Refereed)
Abstract [en]

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 mu m). 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.

Place, publisher, year, edition, pages
2008. Vol. 361-363, p. 873-876
Series
KEY ENGINEERING MATERIALS, ISSN 1013-9826 ; 361-363
Keyword [en]
flexural strength, test methods, calcium aluminate, dental restorative material
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-126356ISI: 000253480200216OAI: oai:DiVA.org:uu-126356DiVA: diva2:323303
Conference
20th International Symposium on Ceramics in Medicine Nantes, FRANCE, OCT 24-26, 2007
Available from: 2010-06-10 Created: 2010-06-10 Last updated: 2018-02-08Bibliographically approved

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Hermansson, LeifEngqvist, Håkan

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