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Title: Biomechanical Characterization of Dental Composite Restoratives - A Micro-Indentation Approach
Keywords: Dental composite, resin-based dental restoratives, test method, mechanical properties, depth-sensing indentation test, fracture toughness
Issue Date: 11-Aug-2009
Source: CHUNG SEW MENG (2009-08-11). Biomechanical Characterization of Dental Composite Restoratives - A Micro-Indentation Approach. ScholarBank@NUS Repository.
Abstract: The current research aims to develop and apply the depth-sensing indentation method as a single test platform for determining the mechanical properties of dental composite restoratives. A customized indentation head that was capable of measuring the load and displacement with high accuracy was developed. The depth-sensing indentation protocol was then established for resin-based dental restorative materials. Subsequently, the indentation hardness, modulus, yield strength and fracture toughness were measured and calculated for all composite materials. The indentation modulus and fracture toughness values were compared and correlated with the test data obtained from the conventional three-point bend test method. The indentation hardness and modulus results were highly reproducible. A significant, positive and strong correlation was found between the flexural and indentation modulus. Correlation for KIC between SENB and indentation fracture testing was not significant. The application of indentation fracture test on dental composite materials warrants further research.
Appears in Collections:Ph.D Theses (Open)

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