Smoother is Not Better (IMAGE) Brown University Caption The faster endothelial cells (green) form a single smooth layer, the less chance exposed metal will provoke an immune response. Samples examined after 1, 3 and 5 days (left to right) show better coverage on nanotextured titanium (bottom row) than on conventional microstructured titanium. Credit Image: Thomas Webster Usage Restrictions None 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.