Summary. Multilayered zirconia products created with different yttria contents by layer have decrease flexural strength than Those people produced with gradient shade technological know-how and exactly the same yttria written content for every layer. Hence, several elements including the type of prostheses, nesting strategies of prostheses inside the zirconia disc, https://www.directivepublications.org/journal-of-dentistry-and-oral-research/