Medical-grade plastic surgical device (IMAGE) Osaka Metropolitan University Caption This polyether ether ketone plate has a thickness of 0.4 mm and can be fastened into a circular shape for use in robot-assisted heart surgery. Credit Osaka Metropolitan University Usage Restrictions News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. License Original 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.