Alex Dommann
Empa, Swiss Federal Laboratories for Materials Science and Technology, Switzerland
Title: Phase contrast and x-ray dark field imaging: new possibilities for analyzing tooth reconstruction
Biography
Biography: Alex Dommann
Abstract
Composite materials have been attracting increasing attention as materials for tooth reconstruction. In medical technology the ceramic reinforced polymers offer a wide range of opportunities. Specific advantages of this composite materials are their robustness, properties for biocompatibility which make them so appealing for tooth reconstruction. For tooth reconstruction, however, not only new manufacturing processes but also appropriate non-destructive testing and characterization tools are required. The presentation concentrates on a novel technique that has demonstrated great potential for non-destructive testing (NDT) and non-destructive evaluation (NDE). This method uses the Talbot-Lau grating interferometer principle. It enables X-ray insights extended by two additional contrast mechanisms: X-ray Phase Contrast Imaging (XPCI) and Scatter Dark Field Imaging (SDFI) [1-3]. Conventional radiographic systems, based on the absorption of x-rays in the sample, have limited contrast for light materials such as polymers and biological tissues. XPCI, on the other hand, is able to reveal subtle changes in the microstructure of the samples, such as micro-cracks in composite.
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