PMMA Space Maintainer (IMAGE) Rice University Caption A scanning electron microscope image shows the outer surface of a porous PMMA space maintainer that has been cut to fit the dimensions of a jawbone defect. Scientists at Rice University have developed a method to infuse the porous material with time-released antibiotics that protect patients from infection while they heal. Credit The Mikos Research Group/Rice University Usage Restrictions For news reporting purposes only. 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.