Title: "Fracture Toughness of Different Zirconia Cores and Veneered or Heart-Pressed Ceramic Layers" Authors: Merlati, G., Salvi R., Sebastiani M., Massimi F., Battaini P., Menghini P., Bemporad E. Published in: Academy of Dental Materials, 13-15 October 2011, Costa Sauipe, Bahia, Brasil Volume #: 00 Pages: 00 Pub Year: 2011 ISSN: DOI: Publication Type: oral contribution at a conference