Experiment (IMAGE) University of Copenhagen - Niels Bohr Institute Caption On the left are X-rays of teeth with fillings of glass ionomer cement. The images show how porous the cement is. On the right are images of the same teeth using neutron scattering. Here you can see if the pores are filled with liquid. Credit (Credit: Benetti, A.R.et al., DOI:10.1038/srep08972 (2015). Usage Restrictions (Credit: Benetti, A.R.et al., DOI:10.1038/srep08972 (2015). License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.